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CY8C3444AXI-116 8-Bit 50MHz 16KB Flash MCU | Infineon
CY8C3444AXI-116

CY8C3444AXI-116 8-Bit 50MHz 16KB Flash MCU | Infineon

Infineon Technologies CY8C3444AXI-116 is an 8-bit PSoC 3 programmable system-on-chip microcontroller with a 50 MHz maximum operating frequency, 16 KB of Flash program memory, and a 100-pin TQFP package measuring 14 x 14 mm. The device uses an 8051-compatible CPU and supports operation from 1.71 V to 5.5 V, making it suitable for embedded control, sensing, and low-power peripheral designs. A programmable system-on-chip is a microcontroller architecture that combines a CPU, Flash memory, programmable digital and analog blocks, and communication peripherals on one integrated circuit. Within the product hierarchy, the CY8C3444AXI-116 belongs to the PSoC 3 family, combining an 8051-compatible 8-bit MCU core with configurable mixed-signal resources. This integration can reduce the number of discrete components needed when a design requires digital control alongside analog sensing, signal conditioning, or communications. The principal device characteristics are a 50 MHz clock rating, 16 KB of Flash program memory, and a 100-pin TQFP package. The operating-voltage range of 1.71 V to 5.5 V supports both lower-voltage and conventional 5 V system environments. The PSoC 3 architecture adds configurable blocks rather than relying solely on fixed peripherals, allowing the same device family to address multiple control-panel, embedded sensing, and compact industrial applications. Program memory, RAM, EEPROM capacity, clock tolerance, and detailed peripheral specifications are not stated in the retrieved product summaries. These parameters must be confirmed in the manufacturer datasheet before final MCU selection. Likewise, the AXI and -116 order-code meanings, temperature range, device revision behavior, and exact pin assignments require verification against the official CY8C34-family documentation. The 14 x 14 mm TQFP format provides 100 external leads and is suitable for conventional surface-mount assembly when the board area and routing density permit. Typical uses include compact industrial controllers, sensor-interface modules, keypad and display products, building-control equipment, and general embedded-control boards. A design is a strong fit when it benefits from an 8051-compatible software model, mixed-signal programmability, and a low pin-count package relative to more complex microcontroller families. The 50 MHz rating also provides additional execution headroom for interrupt-driven control, communication handling, and state-machine software. Hardware design should begin with the exact datasheet pin table because this summary does not reproduce individual ball or lead functions. Confirm power pins, decoupling requirements, programming and debug connections, clock requirements, analog inputs, and exposed package details before layout. Because the family supports multiple supply conditions, the external circuitry and decoupling network should be designed for the exact voltage range and operating mode selected for the product. This product page combines the verified CY8C3444AXI-116 ordering information with engineering-focused selection guidance, a structured specification record, sourcing questions, and design checks. It also identifies the important limitation that no defensible pin-to-pin alternatives were established from the available cross-reference results, preventing unrelated microcontrollers from being presented as drop-in replacements.

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CY8C3444LTI-110 - 50MHz PSoC 3 MCU, 16KB Flash | Infineon
CY8C3444LTI-110

CY8C3444LTI-110 - 50MHz PSoC 3 MCU, 16KB Flash | Infineon

The Infineon Technologies CY8C3444LTI-110 is an 8-bit flash-programmable PSoC 3 CY8C34 family microcontroller with a 50 MHz 8051 CPU, 16 KB of flash memory, and 2 KB of SRAM, supplied in a 68-QFN 8 x 8 mm package. It supports a 1.71 V to 5.5 V operating supply range, making it suitable for low-voltage embedded systems that require programmable analog and digital peripherals in a single device. A programmable system-on-chip, or PSoC, is a mixed-signal microcontroller architecture that combines an embedded CPU with configurable analog and digital peripheral blocks. In the system hierarchy, the CY8C3444LTI-110 is a microcontroller within the broader semiconductor category, while its PSoC resources allow functions such as analog-to-digital conversion, timers, serial communication, and programmable logic to be integrated without relying on separate discrete ICs. The headline characteristics are a 50 MHz maximum operating frequency, 16 KB of flash, 2 KB of SRAM, and a 1.71 V to 5.5 V supply range. The CY8C34 family also supports operation from DC through 50 MHz, according to the family datasheet information supplied for this device. Its integrated programmable architecture can reduce the external component count in control, sensing, and communications designs while preserving deterministic embedded software control. This device uses the 8051 instruction set rather than an ARM Cortex core, so firmware, development tools, register expectations, and peripheral programming cannot be assumed interchangeable with Cortex-based MCUs. The 50 MHz CPU and 8-bit architecture suit compact control loops, user interfaces, protocol handling, and mixed-signal products where a larger 32-bit processor would add unnecessary cost or complexity. Exact peripheral counts, flash endurance, and electrical limits must be confirmed against the full manufacturer documentation. Typical applications include industrial condition monitoring, low-power sensor nodes, consumer control panels, programmable audio or signal-processing interfaces, and compact communication equipment. The 1.71 V minimum supply voltage also supports systems where the MCU must operate directly from a low-energy rail, provided the external analog and digital circuits remain compatible with that voltage. When designing around the CY8C3444LTI-110, verify every power pin, ground connection, analog reference, and high-speed signal against the package pinout and datasheet recommendations. Decouple each supply domain locally, route analog grounds according to the family guidance, and avoid assigning peripheral functions until the required routing and configuration blocks are known. The available data does not expose a verified 68-pin assignment table, so pin-level implementation should follow the manufacturer package drawing directly. This page consolidates the verified manufacturer and distributor specifications for the CY8C3444LTI-110, identifies same-family upgrade paths, and adds engineering-focused selection guidance and application context that are not presented as a substitute for the complete PSoC 3 family datasheet.

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CY8C3445AXA-108 - 8-Bit 50MHz PSoC 3 MCU | Infineon
CY8C3445AXA-108

CY8C3445AXA-108 - 8-Bit 50MHz PSoC 3 MCU | Infineon

The Infineon Technologies CY8C3445AXA-108 is an 8-bit 8051-compatible PSoC 3 programmable system-on-chip with a 50 MHz operating frequency, 32 KB of flash program memory, and a 100-lead TQFP package measuring 14 x 14 mm. It operates from 1.71 V to 5.5 V and combines a microcontroller core with programmable analog and digital resources in a single mixed-signal device. A programmable system-on-chip, or PSoC, is a mixed-signal semiconductor that integrates a microcontroller core with configurable analog blocks, digital peripherals, and routing fabric. The PSoC family extends the conventional MCU hierarchy by placing programmable signal-conditioning, conversion, and timing functions alongside the processor. This allows one configurable device to replace combinations of separate microcontroller, analog, and interface ICs. Verified device attributes include an 8051 instruction-set core, 8-bit architecture, 50 MHz maximum operating frequency, and 32 KB (32K x 8) flash memory. The 1.71 V to 5.5 V operating range supports low-voltage embedded systems, while the large 100-pin package provides extensive access to the device's analog, digital, and I/O resources. The CY8C3445 belongs to the CY8C34xx family of CY8C3xxx PSoC 3 devices. The 100-lead 14 x 14 mm TQFP package is suited to prototypes, control boards, industrial controllers, and measurement equipment that require numerous external connections. Because this device combines programmable analog and digital blocks with general-purpose control logic, firmware configuration, peripheral routing, and external component selection remain central to successful implementation. Typical uses include industrial sensor-conditioning controllers, analog measurement front ends, motor and power-system control, automotive electronic modules, and embedded human-machine interfaces. Its 50 MHz processing capability supports responsive control loops, while the 32 KB flash memory accommodates application firmware and configuration data. When designing a board around the CY8C3445AXA-108, verify the exact pin assignment and peripheral multiplexing in the manufacturer datasheet before routing signals. The wide package pin count should not be interpreted as 100 general-purpose I/O pins; many pins provide alternate analog, debug, programming, power, or clock functions. Decoupling, grounding, and unused-pin treatment must follow the manufacturer's board-layout guidance. This page consolidates verified distributor specifications, pricing references, family-level alternatives, and practical PSoC 3 design considerations so engineers can evaluate the CY8C3445AXA-108 without relying on duplicated distributor descriptions alone.

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CY8C3445AXE-097 - 50MHz 32KB Flash 8-Bit MCU | Infineon
CY8C3445AXE-097

CY8C3445AXE-097 - 50MHz 32KB Flash 8-Bit MCU | Infineon

The Infineon CY8C3445AXE-097 is an 8-bit PSoC 3 CY8C34xx microcontroller with a 50 MHz operating frequency, 32 KB of flash program memory, and a 100-pin TQFP package measuring 14 mm by 14 mm. It belongs to the 8051-compatible microcontroller family and is intended for embedded control applications requiring programmable digital resources, analog peripherals, and a substantial pin count. A microcontroller is a programmable semiconductor integrated circuit that executes firmware, reads inputs, controls outputs, and manages system behavior. The CY8C3445AXE-097 sits within the PSoC 3 family, combining an 8-bit 8051 processing core with programmable resources on one mixed-signal chip. This integration allows designers to implement embedded control functions without relying exclusively on external discrete components. The verified device data identifies a 50 MHz maximum clock frequency and 32 KB, or 32K x 8 bits, of flash memory. Its 100-TQFP package provides 100 physical pins and a 14 mm by 14 mm body size. These package and memory characteristics are the primary selection criteria for designs that cannot use a smaller microcontroller package or require more flash capacity than entry-level devices provide. The PSoC 3 architecture combines programmable digital blocks, analog functions, and fixed peripherals around the 8051 processor core. That mixed-signal architecture is useful in control panels, instrumentation, communications equipment, and industrial products where analog measurement, digital control, serial communication, and general-purpose processing must coexist in a compact embedded platform. Typical use cases include industrial monitoring and control, programmable logic, embedded communications, sensor acquisition, and compact consumer or appliance control systems. The 100-pin package is particularly useful when a design requires numerous general-purpose I/O connections, while the 32 KB flash allocation provides a defined code-storage budget for embedded firmware. Designers should confirm the exact peripheral mix, operating voltage range, RAM capacity, I/O ratings, clock requirements, and package drawing before committing the part to a PCB. The available verified listing does not provide those electrical details, so they must be checked in the official device documentation rather than inferred from the family name. This page combines verified distributor specifications, sourcing information, package attributes, application guidance, and explicit data gaps. It also distinguishes what is confirmed from what remains unverified, helping engineers identify the next documentation step without presenting unsupported pin, electrical, or compliance claims.

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CY8C3445AXE-107 - 8-Bit 50MHz 32KB MCU | Infineon
CY8C3445AXE-107

CY8C3445AXE-107 - 8-Bit 50MHz 32KB MCU | Infineon

Infineon Technologies CY8C3445AXE-107 is an 8-bit PSoC 3 CY8C34xx microcontroller with a 50 MHz operating frequency, 32 KB of flash memory, and a 100-pin TQFP package measuring 14 x 14 mm. It operates from 1.71 V to 5.5 V and belongs to the CY8C34xx family of 8051-compatible embedded microcontrollers. A microcontroller is a programmable semiconductor that integrates a processor core, memory, and peripheral functions into one device. The CY8C3445AXE-107 is specifically an 8-bit MCU with an 8051 instruction-set core. In the product hierarchy, it is an MCU, then a general-purpose embedded processor, and ultimately a semiconductor designed for compact control and monitoring systems. Its 50 MHz clock rate supports faster instruction execution than lower-frequency 8-bit MCUs while retaining a compact architecture. The principal verified features of this device include 32 KB flash memory organized as 32K x 8, 8-bit processing, 50 MHz maximum operating frequency, and a 1.71 V to 5.5 V supply range. The 100-TQFP package provides 100 external connection points and is suitable for automated board assembly. These characteristics make the part applicable to embedded controls, consumer products, industrial equipment, and connected peripherals that require a modest code-memory footprint and broad supply compatibility. The CY8C3445AXE-107 combines an embedded MCU with programmable system functionality associated with the PSoC 3 family. The verified distributor description identifies the device as an 8051 PSoC 3 CY8C34xx MCU. Its operating voltage range allows integration with 1.8 V, 2.5 V, 3.3 V, and 5 V system rails when the associated clock, memory, and peripheral requirements are met. A 50 MHz operating specification provides a useful benchmark for firmware performance, interrupt latency, and peripheral timing. Typical uses include embedded control panels, sensor hubs, motor and actuator controllers, communication modules, and compact consumer appliances. The MCU can execute application firmware from its 32 KB flash memory while coordinating external sensors, communications, and power-control components. For a board-level design, engineers should verify the complete pin mapping, clock requirements, and peripheral configuration against the manufacturer datasheet before finalizing the PCB. The most important design consideration is power-rail compatibility: the accepted input range is 1.71 V to 5.5 V, so the external supply must remain within that interval under transient and tolerance conditions. Designers should also place required bypass and decoupling capacitors close to the supply pins, route clock signals away from noisy switching nodes, and preserve the component's exposed thermal-relief and soldering requirements. This page consolidates distributor availability, verified device specifications, application guidance, and pin-compatible family alternatives. The practical benefit is a concise engineering reference that distinguishes known parameters from information that still requires confirmation from the manufacturer datasheet, helping designers evaluate the CY8C3445AXE-107 before committing a PCB footprint.

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CY8C3445AXE-181 - 50MHz 32KB PSoC 3 8-bit MCU | Infineon
CY8C3445AXE-181

CY8C3445AXE-181 - 50MHz 32KB PSoC 3 8-bit MCU | Infineon

The Infineon Technologies CY8C3445AXE-181 is an 8-bit 8051-compatible PSoC 3 CY8C34xx microcontroller running at up to 50 MHz with 32 KB (32K x 8) embedded flash, supplied from a 1.71 V to 5.5 V core supply, and packaged in a 100-lead TQFP (14 x 14 mm) surface-mount package. It belongs to the PSoC 3 automotive family of programmable system-on-chip devices. A microcontroller is a single integrated circuit containing a CPU core, memory, and peripherals dedicated to embedded control tasks. The CY8C3445 sits in the embedded microcontroller hierarchy (8-bit MCU -> microcontroller -> embedded processor -> semiconductor) and, in PSoC 3, it adds a configurable array of analog and digital blocks. That array replaces the fixed-function peripherals found in older 8051 parts with programmable analog amplifiers, ADC and DAC blocks, comparators, timers, and serial interfaces that are routed by firmware rather than fixed by silicon. Key features of the CY8C3445AXE-181 include the 50 MHz 8051 core with dedicated multiplier/accumulator hardware, 32 KB of flash for program storage, a wide 1.71 V to 5.5 V operating supply range, and the PSoC 3 configurable peripheral array with its characteristic low-leakage sleep modes and fast GPIO. Because the analog blocks are programmable, one device can serve as a mixed-signal controller for touch sensing, motor drive, and signal conditioning without external analog ICs. Technically, the CY8C34xx family is built around a small-footprint 8051 core that reaches 50 MHz using a pipelined architecture with separate multiplier and divider blocks. The configurable block array is connected through a routing fabric, so peripheral placement and pin assignment are decided in the PSoC Creator design tool rather than fixed at manufacture. This is the core architectural difference versus a conventional 8051 such as the AT89C51, where timers, UARTs, and ADC channels are hard-wired to fixed pins. Typical applications include automotive body control modules, sensor-hub and condition-monitoring nodes, industrial control panels, building automation endpoints, and low-power IoT sensing nodes where the programmable analog front end reduces the bill of materials. The 100-lead TQFP footprint exposes enough GPIO and analog-capable pins to bring out multiple mixed-signal channels simultaneously. A key design consideration is that the PSoC Creator toolchain and the generated configuration data must accompany the firmware image; the on-chip configuration is programmed at boot, so field updates need to include the configuration flash content alongside the application code. Users should also confirm the exact pin multiplexing of their chosen configuration against the 100-pin TQFP pinout. This page consolidates verified distributor pricing and availability for CY8C3445AXE-181 as of 2026-10-30, pin-compatible drop-in alternatives from the same PSoC 3 family, a parameter-by-parameter comparison, and practical design notes that go beyond the manufacturer datasheet.

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CY8C3445AXI-108 - 50MHz PSoC 3 MCU | Infineon
CY8C3445AXI-108

CY8C3445AXI-108 - 50MHz PSoC 3 MCU | Infineon

Infineon Technologies CY8C3445AXI-108 is an 8-bit PSoC 3 CY8C34-series programmable system-on-chip microcontroller with a 50 MHz operating frequency, 32 KB flash memory, 4 KB SRAM, and a 100-pin TQFP package measuring 14 x 14 mm. The device combines an 8051-compatible microcontroller core with programmable digital and analog system resources, making it suitable for embedded control designs requiring more integration than a conventional microcontroller. A programmable system-on-chip, or PSoC, is a mixed-signal microcontroller family that integrates a processor core, programmable digital blocks, analog resources, and configurable peripherals into one device. Its position in the semiconductor hierarchy is microcontroller -> programmable system-on-chip -> mixed-signal embedded controller. This integration can reduce the number of external components required when a design needs digital control, signal conditioning, data acquisition, or programmable timing. The verified device data identifies an 8-bit 8051 architecture, operation from DC to 50 MHz, 32 KB of flash, and 4 KB of SRAM. The 50 MHz maximum operating frequency provides a defined performance ceiling for timing-sensitive control tasks, while 32 KB of flash supplies embedded program storage and 4 KB of SRAM supports working memory. The operating-voltage range is 1.71 V to 5.5 V, allowing the device to operate across common low-voltage embedded systems. The CY8C3445AXI-108 is packaged in a 100-pin TQFP with a 14 x 14 mm body. This relatively high pin count provides access to the device's digital and analog resources, including external interfaces and programmable I/O paths. A 100-pin surface-mount package is more appropriate than a small-outline package when a design requires broad peripheral access or dedicated analog routing. Typical uses include industrial control modules, sensor-conditioning systems, digital power controllers, communications equipment, and compact embedded automation platforms. The PSoC architecture is particularly useful when a board must combine deterministic digital control with programmable analog acquisition or conversion. Firmware configuration determines how the available digital and analog blocks are assigned to the intended signal chain. Designers should verify the complete pin assignments, exposed power requirements, supported clock configurations, and decoupling requirements against the manufacturer datasheet before layout. Decoupling capacitors should be placed directly beside their associated supply pins, while sensitive analog inputs require short traces, controlled grounding, and separation from fast digital switching paths. Firmware and peripheral configuration must also be validated at the intended 1.71 V to 5.5 V supply conditions. This product page combines verified distributor specifications, source links, application guidance, and a conservative drop-in assessment. It explicitly distinguishes documented CY8C3445AXI-108 data from unavailable pin-level details and avoids presenting unverified cross-brand replacements as guaranteed drop-in equivalents.

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CY8C3445LTI-081 - 50MHz 8-bit USB MCU | Infineon Technologies
CY8C3445LTI-081

CY8C3445LTI-081 - 50MHz 8-bit USB MCU | Infineon Technologies

Infineon Technologies CY8C3445LTI-081 is an 8-bit PSoC 3 microcontroller with a 50 MHz maximum operating frequency, 32 KB of flash memory, 4 KB of SRAM, and USB plus serial connectivity in a 68-QFN 8 x 8 mm package. The device combines an 8051-compatible processing architecture with programmable analog and digital resources, making it suitable for embedded control designs that require more flexibility than a conventional fixed-function microcontroller. A programmable system-on-chip, or PSoC, integrates a processor core, programmable digital blocks, analog resources, and connectivity into one configurable device. Within the embedded-controller hierarchy, PSoC 3 belongs to the 8-bit microcontroller family and combines MCU operation with programmable mixed-signal capabilities. This architecture lets engineers place functions such as timers, serial interfaces, analog conversion, and control logic into a compact system while retaining the familiar 8051 instruction set. The CY8C3445LTI-081 provides 32 KB of flash, 4 KB of SRAM, 1 KB of data EEPROM, and 8 KB of ECC flash according to the verified Keil device record. It supports a maximum clock frequency of 50 MHz and includes USB plus serial connectivity, dual datapointers, four flash protection levels, 27 interrupt sources, and eight interrupt priority levels. These resources support connected consumer, industrial, and embedded-control products that need flexible I/O and mixed-signal support in a small package. The 8051 processing architecture provides a familiar development base for embedded software, while the PSoC programmable blocks allow peripheral behavior to be adapted to the product rather than relying entirely on fixed silicon functions. The verified device record identifies one Peripheral Hub Unit with eight parallel access paths. At the same time, the flash protection levels and EEPROM provide mechanisms for separating executable code from frequently updated data or application-specific parameters. Typical uses include USB-connected human-interface devices, compact industrial controllers, serial data acquisition equipment, and consumer products requiring several mixed-signal functions. The USB interface is especially useful for configuration, firmware update, logging, or direct host communication. The 32 KB flash capacity is appropriate for moderate embedded applications, while 4 KB of SRAM supports application state, buffers, and interrupt-driven control tasks. Designers should verify the exact USB electrical implementation, exposed-pin assignments, clock configuration, analog resources, and power requirements against the manufacturer datasheet before schematic release. Because the verified 68-QFN pin map is not included in the supplied source data, this page does not reproduce a potentially misleading pinout. The package drawing should also be checked against the source land pattern and exposed-pad requirements. This page consolidates verified distributor specifications, programming-oriented device details, source links, application guidance, and a constrained drop-in comparison into one engineering-oriented resource. It also distinguishes confirmed specifications from parameters that require confirmation in the manufacturer datasheet, helping designers make procurement and design decisions without inventing missing technical data.

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CY8C3445LTI-089 - 50MHz 8051 MCU, 32KB Flash | Infineon
CY8C3445LTI-089

CY8C3445LTI-089 - 50MHz 8051 MCU, 32KB Flash | Infineon

The Infineon CY8C3445LTI-089 is an 8-bit PSoC 3 mixed-signal microcontroller with an 8051 core, a 50 MHz maximum operating frequency, 32 KB of flash program memory, and a 48-VFQFN package measuring 7 mm by 7 mm. Its stated operating-voltage range is 1.71 V to 5.5 V, and its specified ambient operating-temperature range is -40 °C to +85 °C. The device also includes 8 KB of RAM according to its product listing. A PSoC 3 is a programmable system-on-chip, combining an embedded microcontroller core with configurable analog and digital peripheral blocks. Within the embedded-device hierarchy, it belongs to the 8-bit microcontroller family and uses an 8051-compatible architecture. This integration allows control logic, analog functions, communications, and human-interface functions to be implemented in a compact embedded system rather than requiring a separate microcontroller and several discrete support devices. The CY8C3445LTI-089 provides 32 KB of flash memory organized as 32K by 8 bits, 8 KB of SRAM, and a 50 MHz processor clock. Its communications feature set includes USB, LIN, and I2C interfaces. These interfaces make the device applicable to connected control products, industrial interfaces, human-machine interfaces, and USB-connected embedded equipment. Flash storage permits firmware to be updated after manufacture, while SRAM supports working memory for real-time control operations. The device is based on the CY8C34 family of ultra-low-power PSoC devices, whose configurable architecture allows digital functions and analog blocks to be combined according to application requirements. The family supports interrupt-driven embedded control and includes programmable resources that can replace combinations of counters, timers, communications logic, and analog interface circuitry. Peripheral configuration and firmware remain application-specific, so designers should verify the required block combinations, pin assignments, and clock settings before committing a layout. Typical uses include capacitive-touch control panels, USB-to-LIN equipment, compact industrial controllers, sensor-interface products, and consumer human-machine interfaces. The 48-VFQFN exposed-pad package supports compact board layouts and provides a thermal path to the PCB. In USB applications, firmware must also account for enumeration, power-state management, ESD protection, and the connector's bus-routing requirements. Layout planning should place decoupling capacitors close to the supply pins, connect the exposed pad to the appropriate ground plane, and keep sensitive analog and communication routes away from fast digital edges. Because no complete verified pin-name table or package drawing is published in the product record, use the pin-description table in the manufacturer datasheet when assigning tracks and programming the device. Confirm the exact exposed-pad and thermal-land pattern before fabrication. This page organizes the core electrical, memory, interface, environmental, and packaging characteristics into an engineering-focused selection reference. It also provides application guidance, sourcing questions, and design cautions that help teams evaluate the CY8C3445LTI-089 for compact 8051-based embedded designs without obscuring the differences between an exact orderable part and a broader functional equivalent.

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CY8C3446AXE-099 50MHz 64KB PSoC 3 MCU | Infineon
CY8C3446AXE-099

CY8C3446AXE-099 50MHz 64KB PSoC 3 MCU | Infineon

Infineon Technologies CY8C3446AXE-099 is an 8-bit PSoC 3 CY8C34xx mixed-signal microcontroller with a 50 MHz 8051 core, 64 KB of embedded flash memory, and a 100-pin TQFP package measuring 14 x 14 mm. The device operates from 1.71 V to 5.5 V, supports 62 I/O, and integrates programmable analog and digital resources for embedded control applications. A PSoC, or Programmable System-on-Chip, is a microcontroller architecture that combines a conventional CPU with configurable analog and digital peripheral blocks. The CY8C34xx family belongs to the broader hierarchy of embedded mixed-signal controllers, combining an 8051-compatible microcontroller core with programmable system resources. This integration allows designers to configure sensing, control, communication, and timing functions in a compact device instead of relying on numerous discrete components. The CY8C3446AXE-099 combines 64 KB flash with a 50 MHz processing core, a wide 1.71 V to 5.5 V operating range, and 62 I/O in the same 100-lead TQFP package. Its 24 universal digital blocks provide programmable logic and control functions, while the integrated analog resources support measurement and conditioning tasks. These features make the device useful in designs requiring flexible peripheral behavior, compact PCB area, and embedded control without a separate programmable logic device. The suffix AXE identifies a specific ordering configuration within the CY8C34xx family, and the -099 designation identifies the 64 KB flash configuration. The I variant and the E variant are both listed in the same 100-pin package family, but their temperature and ordering codes must be checked before substitution. Firmware portability, oscillator configuration, analog accuracy, and required operating temperature should therefore be evaluated as a complete system rather than relying on package appearance alone. Typical applications include industrial control panels, sensor nodes, programmable signal conditioners, building automation controllers, communication modules, and compact embedded test equipment. In these systems, the mixed-signal architecture can reduce component count and simplify firmware-based configuration. The 50 MHz core provides processing headroom for coordinating peripheral blocks, applying calibration, and supervising real-time control tasks. The primary design consideration is the 1.71 V to 5.5 V supply range and its effect on clocking, analog references, and communication interfaces. Designers should preserve the required decoupling network, route sensitive analog inputs away from fast-switching nodes, and validate startup and shutdown behavior across the intended voltage range. The 100-pin TQFP footprint also requires careful fanout planning because its lead pitch is substantially finer than a typical dual-inline package. This product record combines exact ordering information, verified distributor listings, package details, technical comparisons, and application-focused design guidance. It is intended to help engineers identify the correct CY8C34xx configuration, plan a pin-compatible procurement decision, and understand where the device's programmable mixed-signal resources can reduce external circuitry.

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CY8C3446LTI-074 50MHz 64KB Flash PSoC 3 | Infineon
CY8C3446LTI-074

CY8C3446LTI-074 50MHz 64KB Flash PSoC 3 | Infineon

Infineon Technologies CY8C3446LTI-074 is an 8-bit PSoC 3 programmable system-on-chip with a 50 MHz 8051 CPU, 64 KB flash memory, 8 KB SRAM, and a 68-QFN 8 x 8 mm package. It combines programmable digital peripherals with analog and memory resources in a compact system-on-chip, making it suitable for embedded control applications requiring more flexibility than a conventional fixed-function microcontroller. A programmable system-on-chip, or PSoC, is a mixed-signal microcontroller architecture that integrates a CPU with configurable digital blocks, analog conversion functions, and specialized peripherals. Within the semiconductor hierarchy, the CY8C3446LTI-074 is a microcontroller, a programmable controller, and a system-on-chip device. Its PSoC architecture allows designers to use programmable blocks for digital functions while retaining analog peripherals such as ADCs, DACs, comparators, and programmable gain amplifiers. The device operates with an 8051 CPU at up to 50 MHz and includes 64 KB of flash program memory, 8 KB of SRAM, 2 KB of data EEPROM, and 8 KB of ECC flash. Its peripheral hub provides eight parallel access paths, while 24 universal digital blocks support configurable digital logic and communication functions. The device also includes a configurable ADC unit, two data pointers, an interrupt system with 27 sources and eight priority levels, and four flash protection levels. The 68-QFN package measures 8 x 8 mm according to distributor listings, supporting compact PCB layouts in consumer, industrial, communications, and control equipment. Its 1.71 V to 5.5 V operating range permits operation from common low-voltage digital rails. The integrated programmable resources can reduce the number of discrete components needed for control, signal conditioning, and communication tasks, although the exact peripheral assignments and available divider, timer, and communication configurations must be confirmed in the manufacturer datasheet. Typical applications include industrial control panels, building automation modules, sensor-conditioning systems, motor and actuator controllers, low-cost data loggers, and compact communications equipment. The combination of 64 KB flash, 8 KB SRAM, 24 universal digital blocks, and analog peripherals supports applications that need both deterministic embedded control and flexible signal acquisition. Software can configure many peripherals, simplifying product variation without changing the PCB. When designing a board around the CY8C3446LTI-074, verify the exposed-pad and QFN assembly requirements, provide all specified bypass capacitors, and confirm the exact pin multiplexing in the device datasheet. Programming, clocking, and low-power behavior should also be validated with the current Cypress or Infineon PSoC Creator tooling before production release. This page consolidates verified distributor specifications, package details, procurement information, and practical design guidance for engineers evaluating the CY8C3446LTI-074. It also distinguishes directly documented PSoC 3 family variants from unsupported cross-package substitutions, helping BOM decisions remain grounded in available technical evidence.

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CY8C3446LTI-083 - 50MHz 8-Bit PSoC 3 MCU | Infineon
CY8C3446LTI-083

CY8C3446LTI-083 - 50MHz 8-Bit PSoC 3 MCU | Infineon

The Infineon CY8C3446LTI-083 is an 8-bit PSoC 3 system-on-chip microcontroller with an 8051 CPU, 50 MHz maximum operating frequency, 64 KB of flash memory, and a 48-QFN 7 x 7 mm package. It operates from 1.71 V to 5.5 V and combines programmable digital and analog resources with USB and serial connectivity. The device is positioned as a low-power embedded-control platform for industrial, consumer, motor-drive, motion-control, and connected peripheral designs. A PSoC, or Programmable System-on-Chip, is a microcontroller architecture that integrates a CPU with configurable peripheral blocks. In the CY8C34 family, the 8051 CPU executes firmware while programmable digital blocks support timing, serial protocols, control functions, and general-purpose logic. Analog resources can be used for signal conditioning and measurement, reducing the need for separate peripheral ICs when the application can be mapped into the device's programmable fabric. Key verified features of the CY8C3446LTI-083 include an 8-bit 8051-compatible processor, 50 MHz maximum clock operation, 64 KB flash, 8 KB SRAM, and operation from 1.71 V to 5.5 V. The family documentation also identifies 2 KB of data EEPROM, four flash protection levels, eight interrupt sources, eight priority levels, and one Peripheral Hub Unit with eight parallel access paths. These characteristics make the device suitable for designs requiring flexible peripheral allocation, embedded flash storage, and mixed control connectivity. The CY8C34 family's configurable blocks distinguish it from a conventional fixed-peripheral microcontroller. Designers can allocate digital resources according to system timing and communication requirements instead of selecting a device solely from a fixed block map. The result is a compact system-level solution for control boards, sensor interfaces, USB-connected products, and motor-drive or motion-control applications. The 48-QFN package also supports compact PCB layouts, although exposed-pad thermal management must be considered during layout. Typical uses include USB and serial connectivity in embedded peripherals, industrial measurement and control systems, consumer interfaces, and motor-control or motion-control platforms. The 1.71 V minimum operating voltage supports low-voltage system rails, while the 5.5 V maximum provides compatibility with conventional 5 V powered equipment. Firmware and peripheral configuration should be validated against the family's complete datasheet and the selected development kit before production release. When designing a board around the CY8C3446LTI-083, verify the exact package pinout, exposed-pad connection, supported I/O voltage, USB implementation requirements, and programming interface in the manufacturer documentation. Use the device's low-power operating modes when appropriate, but confirm wake-up behavior and active-state current against the actual system workload. USB-connected or motor-control designs also need careful grounding, filtering, and signal-integrity planning. This product summary consolidates verified distributor specifications, the available same-family cross-reference, and practical engineering guidance into one searchable reference. It is intended to help engineers evaluate the CY8C3446LTI-083 for embedded control, USB, serial, and motion-control designs without treating a nearby family member as an automatic substitute.

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CY8C3446PVI-102 - 50MHz 8051 PSoC 3 MCU | Infineon
CY8C3446PVI-102

CY8C3446PVI-102 - 50MHz 8051 PSoC 3 MCU | Infineon

The Infineon CY8C3446PVI-102 is an 8-bit PSoC 3 programmable system-on-chip microcontroller with an 8051 processing architecture, operation up to 50 MHz, 64 KB of Flash memory, and 8 KB of SRAM in a 48-SSOP package. Its 1.71 V to 5.5 V operating range makes it suitable for embedded control applications operating from low-voltage digital rails, while its integrated CAN/LIN networking capability supports connected industrial, automotive, and consumer equipment. A PSoC, or programmable system-on-chip, combines a microcontroller core with configurable analog and digital peripheral blocks on one integrated circuit. This product belongs to the CY8C34xx PSoC 3 family, whose 8051 core is supplemented by Universal Digital Blocks, a configurable ADC, communication peripherals, timers, and programmable interconnect. The result is a platform that can consolidate functions that would otherwise require a separate microcontroller and several discrete peripheral devices. The verified device data identifies 24 Universal Digital Blocks, two data pointers, 27 interrupt sources with eight priority levels, one Peripheral Hub Unit with eight parallel access paths, 64 KB of program Flash, and 8 KB of SRAM. It also includes a 2 KB data EEPROM and four Flash protection levels according to the Keil device record. These resources support structured firmware, concurrent control tasks, protocol handling, and protection of firmware intellectual property. Operation up to 50 MHz provides headroom for responsive control loops and mixed peripheral workloads. The configurable peripheral architecture allows designers to implement timers, serial interfaces, signal processing, and communication functions in hardware instead of relying entirely on CPU software. Because the supplied records identify CAN and LIN networking, the device is positioned for both higher-speed CAN networks and lower-cost LIN subnets commonly found in vehicle and industrial control networks. Typical applications include CAN-connected industrial controllers, LIN peripheral modules, automotive body electronics, motor and valve control, compact sensor hubs, and low-cost appliances. The 48-SSOP package supports compact through-hole PCB layouts, although pin density and thermal performance should be considered carefully in designs operating at elevated ambient temperatures. When designing around the CY8C3446PVI-102, confirm the device's complete pinout, exposed programming and power connections, peripheral routing options, and electrical limits against the manufacturer datasheet. The verified distributor listings do not provide a complete pin table, so engineers should not infer missing pin functions from the package outline. This page combines verified distributor and device-profile data with practical application guidance, comparison parameters, and engineering caveats. It is intended to support component identification and initial design planning while clearly separating confirmed values from parameters that require manufacturer-datasheet review.

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CY8C3645AXE-169 - 48MHz 32KB Flash MCU | Infineon
CY8C3645AXE-169

CY8C3645AXE-169 - 48MHz 32KB Flash MCU | Infineon

Infineon Technologies CY8C3645AXE-169 is an 8-bit PSoC 3 CY8C36xx programmable system-on-chip microcontroller with an 8051 core, a 48 MHz operating frequency, and 32 KB of flash memory. The device is supplied in a 100-pin TQFP package measuring 14 mm by 14 mm. Its operating-voltage range is 0.5 V to 5.5 V, making it suitable for embedded control systems that combine programmable digital logic, analog functions, and microcontroller processing in one integrated device. A PSoC 3, or programmable system-on-chip, is a mixed-signal microcontroller architecture that integrates a CPU, programmable analog and digital peripheral blocks, and signal-processing resources. This system-on-chip approach can reduce the number of separate components needed when a design requires sensor measurement, control logic, data processing, and digital communication. Within the component hierarchy, the CY8C3645AXE-169 belongs to the CY8C36 family of 8-bit microcontrollers and combines MCU functionality with configurable analog and digital peripherals. The principal verified specifications are a 48 MHz clock, 32 KB flash memory organized as 32K by 8 bits, an 8051 instruction-set core, and a 0.5 V to 5.5 V supply range. These parameters position the device for compact embedded-control applications requiring moderate processing speed and integrated programmable resources. The 100-pin TQFP package provides a substantial pin count for external sensing, communication, control, and mixed-signal connections compared with smaller microcontroller packages. The CY8C36 family architecture supports signal acquisition, signal processing, and control through configurable blocks. This enables designers to implement functions such as analog sensing, digital logic, and communications control around a common programmable platform. The 32 KB embedded flash provides on-chip program storage, while the 48 MHz operating frequency supports faster execution than basic low-speed 8-bit control devices. Exact RAM, peripheral count, GPIO count, and converter performance require confirmation from the manufacturer datasheet. Typical uses include industrial sensing and control modules, building automation interfaces, consumer product controllers, communication equipment, and embedded systems requiring programmable analog and digital blocks. The device may also be evaluated in educational and prototype platforms because its broad peripheral integration can simplify board partitioning. Firmware compatibility and peripheral availability must be checked for each exact family member before production use. A key design consideration is package complexity. The 100-pin TQFP footprint requires careful escape routing and adequate PCB land-pattern accuracy. Designers should also verify the selected voltage range, clock configuration, pin multiplexing, and power-supply requirements against the manufacturer datasheet rather than assuming that every CY8C36 member has identical resources. The verified distributor data identifies the CY8C3645AXE-169 as a 100-TQFP, 14 mm by 14 mm device.

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CY8C3646AXE-178 - 8-Bit 48MHz 8051 MCU | Infineon Technologies
CY8C3646AXE-178

CY8C3646AXE-178 - 8-Bit 48MHz 8051 MCU | Infineon Technologies

Infineon Technologies CY8C3646AXE-178 is an 8-bit 8051-compatible PSoC 3 CY8C36xx microcontroller operating at up to 48 MHz with 64 KB of flash memory and a 0.5 V to 5.5 V supply range. It is packaged in a 100-pin TQFP (14 mm x 14 mm) package. The device is identified in the verified distributor data as an automotive-oriented 3.3 V/5 V MCU, with the complete ordering suffix -178 identifying the specific package, temperature, qualification, and configuration. What is an 8-bit MCU? An 8-bit microcontroller is a programmable embedded controller whose central processing unit operates on 8-bit data words. The CY8C3646AXE-178 belongs to the 8051 MCU family and combines a general-purpose CPU with embedded flash, digital peripherals, and mixed-signal-capable PSoC resources. This hierarchy places it between simple fixed-function controllers and higher-performance 32-bit microcontrollers used in industrial, automotive, and consumer applications. The verified specifications identify 48 MHz operating frequency, 64 KB (64K x 8) flash, an 8051 instruction-set core, and a 0.5 V to 5.5 V operating-voltage range. These headline values make the part suitable for embedded control, communication, sensing, and general automotive electronic modules where deterministic 8-bit processing and integrated nonvolatile program memory are useful. Exact RAM capacity, peripheral configuration, GPIO count, ADC characteristics, and automotive qualification details require confirmation in the manufacturer documentation. The CY8C36xx architecture is positioned for connected embedded designs that need more control capability than a basic 8-bit device but can benefit from the simple programming model and resource integration of the PSoC 3 family. Its 48 MHz clock rate provides additional processing headroom for protocol handling, state-machine control, and mixed-signal system management, subject to the resource limits and electrical conditions specified by the manufacturer. Typical uses include automotive body and comfort modules, sensor nodes, actuator controllers, industrial interfaces, and embedded communication equipment. The 100-TQFP package provides many external connection points, but its relatively large 14 mm x 14 mm footprint requires adequate routing space, thermal copper, and assembly clearance. Designers should also account for automotive qualification, clock configuration, supply sequencing, and the exact peripheral assignments associated with the selected device variant. A primary design consideration is to validate the -178 ordering suffix against the required package, temperature range, qualification level, and production configuration before PCB release. Because the verified data does not provide the manufacturer datasheet URL, detailed pin map, electrical limits, or calibrated pricing, this page marks those fields as data needed rather than guessing. This page consolidates the supplied distributor specifications, sourcing constraints, and design guidance for faster component review.

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CY8C3665AXA-010 - 67MHz 8051 32KB Flash MCU | Infineon
CY8C3665AXA-010

CY8C3665AXA-010 - 67MHz 8051 32KB Flash MCU | Infineon

The Infineon CY8C3665AXA-010 is an 8-bit 8051-compatible PSoC 3 microcontroller with 32KB of Flash memory, a maximum stated clock frequency of 67 MHz, and a 0.5 V to 5.5 V operating supply range. The component is listed in a 100-pin TQFP package measuring 14 mm by 14 mm by the distributor specification. Its combination of programmable digital and analog peripherals, embedded memory, and an 8051-compatible core places it within the PSoC 3 CY8C36xx family. A programmable system-on-chip is an integrated semiconductor that combines a microcontroller core, memory, configurable digital peripherals, and configurable analog resources. PSoC devices extend the MCU concept by allowing designers to configure peripheral functions in hardware and software rather than relying only on fixed peripheral blocks. The CY8C36xx family therefore serves as a programmable embedded system-on-chip within the broader microcontroller and embedded semiconductor hierarchy. The verified distributor listing identifies 32KB of Flash organized as 32K by 8, an 8-bit 8051 architecture, and operation up to 67 MHz. The stated 0.5 V to 5.5 V supply range provides compatibility with low-voltage digital systems, while the 100-pin TQFP package exposes a comparatively large number of external connections for mixed-signal designs. Exact peripheral counts, SRAM capacity, clock configurations, and electrical limits require confirmation in the manufacturer documentation. Typical implementation areas include embedded control panels, industrial interface modules, data-acquisition equipment, consumer peripherals, and connected products that benefit from programmable analog and digital functions. The 8051-compatible instruction set and integrated peripherals can simplify designs that would otherwise require a discrete MCU plus support ICs. Firmware and peripheral configuration remain design-specific, so the application should be validated against the complete manufacturer documentation before production release. A primary design consideration is package and pin verification. The available distributor records identify a 100-pin TQFP, while another listing describes a 100-LQFP; engineers must therefore confirm the exact package drawing, exposed-pad treatment, and land pattern before layout or replacement. This page combines verified distributor facts, conservative data markers, replacement analysis, and engineering guidance to distinguish confirmed information from values that still require manufacturer confirmation.

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CY8C3665LTI-199 - 67MHz PSoC 3 MCU with 32KB Flash | Infineon
CY8C3665LTI-199

CY8C3665LTI-199 - 67MHz PSoC 3 MCU with 32KB Flash | Infineon

The Infineon CY8C3665LTI-199 is a PSoC 3 programmable system-on-chip microcontroller with an 8051 CPU, 67 MHz maximum operating frequency, 32 KB flash memory, and a 12-bit ADC in a 68-QFN surface-mount package. The CY8C36xx family combines a microcontroller core with programmable analog and digital resources, allowing compact designs to integrate sensing, control, and communications functions without relying on several discrete components. A PSoC, or programmable system-on-chip, is an MCU-family device that places a processor, programmable peripheral blocks, analog conversion functions, and digital logic on one integrated circuit. Within the product hierarchy, a PSoC is a microcontroller and embedded control device, while its configurable analog and digital blocks extend beyond the functions of a basic fixed-function MCU. This integration can reduce board area and development effort when firmware can configure the required peripheral combination. The CY8C3665LTI-199 operates at up to 67 MHz and includes 32 KB of flash plus 4 KB of SRAM according to the distributor product data. Its 12-bit ADC supports applications that require measurements beyond the resolution of an 8-bit microcontroller input. A 1.71 V to 5.5 V flexible supply range provides compatibility with embedded supply rails, while the industrial temperature range of -40°C to +85°C supports operation across industrial, consumer, and automotive-adjacent environments. The device belongs to the CY8C36xx PSoC 3 family and uses the Infineon or Cypress PSoC Creator-compatible design ecosystem. Its architecture is suited to mixed-signal products in which analog sensing, digital control, timers, communication, and programmable logic must share a compact microcontroller platform. The supplied manufacturer information confirms the 8051 core, 32 KB flash, and 12-bit ADC; detailed peripheral assignments and register behavior must be checked against the manufacturer datasheet for the selected clock, routing, and converter configuration. Typical uses include industrial control panels, capacitive sensing interfaces, compact consumer controls, temperature and environmental measurement systems, and communication-enabled embedded products. The 12-bit ADC is particularly useful for monitoring analog sensors, while the 67 MHz processing rate provides additional headroom for protocols, control logic, and system management tasks. Designers should verify the complete 68-QFN pin assignment, exposed-pad connection, decoupling requirements, clock options, and power-sequencing limits in the manufacturer documentation before layout. Because this is a configurable mixed-signal MCU, unused analog and digital blocks should be configured deliberately, and analog routing and sensitive measurement circuits should be placed away from high-current switching paths. This product record combines verified manufacturer and distributor specifications, availability links, procurement guidance, and design-focused selection criteria. It also distinguishes confirmed technical facts from details that require validation in the full datasheet, helping engineers evaluate the CY8C3665LTI-199 without mistaking a related-family device for a verified drop-in replacement.

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CY8C3665PVI-008 - 67MHz 8051 PSoC 3 MCU | Infineon
CY8C3665PVI-008

CY8C3665PVI-008 - 67MHz 8051 PSoC 3 MCU | Infineon

Infineon Technologies CY8C3665PVI-008 is an 8-bit PSoC 3 programmable system-on-chip with a 67 MHz 8051 MCU core, 32 KB of Flash memory, and a 12-bit ADC in a 48-pin SSOP package. The device combines a microcontroller with programmable analog and digital peripheral resources in a single mixed-signal IC. A PSoC 3 is a programmable system-on-chip in the embedded microcontroller hierarchy. It integrates an 8051-compatible CPU core with configurable analog and digital blocks rather than relying exclusively on fixed peripherals. This system-level integration can reduce external component count in applications requiring mixed-signal sensing, control, communication, or low-power operation. The CY8C3665PVI-008 provides 32 KB of Flash organized as 32K x 8 bits, 4 KB of SRAM, 1 KB of data EEPROM, and 8 KB of ECC Flash according to the manufacturer and Keil device information. Its 12-bit ADC supports analog measurement tasks, while the dual datapointers and interrupt architecture help manage time-critical data movement and event handling. Technical information identifies the device as an 8-bit, single-core 8051 microcontroller operating up to 67 MHz. The manufacturer product page lists the part as a CY8C36-series PSoC 3 with 32 KB Flash and a 12-bit ADC. Mouser additionally identifies a 0.5 V to 5.5 V operating range, while distributor listings identify the 48-pin SSOP package and 3.3 V operating class. Typical uses include industrial sensing and control, low-power monitoring, embedded instrumentation, general-purpose control panels, and compact consumer products. The 67 MHz CPU speed supports faster control-loop execution, the 12-bit ADC supports analog input conditioning, and the programmable PSoC architecture allows peripheral functions to be adapted to a particular board design rather than fixed entirely at manufacture. When designing around this device, verify the exact pin arrangement, exposed-pad requirements, operating-temperature grade, and clock implementation against the current manufacturer documentation. Supply decoupling and grounding remain important because analog measurements can be affected by noise coupling from digital and switching circuitry on a mixed-signal PCB. This product record combines current distributor availability information, verified device parameters, manufacturer sourcing, and practical application guidance. It also distinguishes documented characteristics from unavailable details and clearly identifies the limited number of confirmed same-footprint drop-in alternatives.

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CY8C3666AXI-200 - 67MHz 64KB PSoC MCU | Infineon
CY8C3666AXI-200

CY8C3666AXI-200 - 67MHz 64KB PSoC MCU | Infineon

Infineon Technologies CY8C3666AXI-200 is an 8-bit PSoC programmable system-on-chip microcontroller with a 67 MHz 8051-compatible core, 64 KB of flash memory, 8 KB of SRAM, CAN and LIN networking, and timer/PWM control. The device is supplied in a 100-pin TQFP package and is identified as an in-production part. Its operating voltage options are 2.5 V, 3.3 V, and 5 V, providing flexibility for embedded industrial, automotive, and consumer-control designs. A programmable system-on-chip, or PSoC, is a mixed-signal microcontroller architecture that combines a CPU, programmable digital and analog peripherals, memory, and configurable signal-processing resources on one integrated circuit. The CY8C3666 belongs to the PSoC 3 family and retains the familiar 8051 instruction architecture while adding dedicated networking and control blocks. In the hierarchy, it is a microcontroller, mixed-signal IC, and embedded processor rather than a general-purpose application processor. The verified device data identifies 64 KB of flash, 8 KB of SRAM, a maximum operating frequency of 67 MHz, dual datapointers, 27 interrupt sources with eight priority levels, and eight parallel access paths through its Peripheral Hub Unit. Additional memory resources include four flash protection levels, 2 KB of data EEPROM, and 8 KB of ECC flash. These resources support moderate protocol stacks, state-machine control, data logging, and connected embedded products without requiring external memory. CAN and LIN connectivity make the CY8C3666AXI-200 especially relevant to automotive and industrial networks. CAN supports higher-bandwidth, multi-node communication, while LIN addresses lower-cost, lower-bandwidth vehicle sub-networks. Dedicated timers and PWM resources support motor, lighting, actuator, and general timing functions. The combination allows designers to consolidate control, communication, and peripheral functions into a single 100-pin TQFP device. Typical uses include automotive body and gateway controllers, CAN-to-LIN network nodes, industrial sensor hubs, building-control equipment, motor-control subsystems, and compact consumer-control boards. Designers should verify every pin, peripheral mapping, clock configuration, transceiver interface, and electrical limit against the manufacturer datasheet before production release. Software and peripheral assignments should also be validated with the supported PSoC development environment. The principal design consideration is package allocation: the 100-pin TQFP exposes many I/O and peripheral resources, but every assigned function must comply with the published pin-mux and electrical characteristics. This page combines verified device specifications, sourced availability references, same-family substitution findings, package information, and practical engineering guidance to support design review and procurement.

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CY8C3666AXI-202 - 67MHz PSoC 3 MCU | Infineon | 100-TQFP
CY8C3666AXI-202

CY8C3666AXI-202 - 67MHz PSoC 3 MCU | Infineon | 100-TQFP

The Infineon Technologies CY8C3666AXI-202 is a PSoC 3 programmable system-on-chip based on an 8-bit 8051 CPU, operating up to 67 MHz and integrating 64 kByte of flash memory, 8 kByte of SRAM, and 62 GPIOs in a 100-TQFP package measuring 14 x 14 mm. A PSoC 3 is a mixed-signal microcontroller that combines a CPU, programmable digital blocks, analog resources, and specialized peripherals in one integrated circuit. The MCU belongs to the hierarchy 8051 microcontroller, embedded microcontroller, programmable system-on-chip, and integrated semiconductor. Unlike a general-purpose 8051 device, it provides configurable peripheral resources and a hardware hub for connecting blocks within the chip. The verified feature set includes a single-core 8051 processor rated up to 67 MHz, 64 kByte of flash organized as 64K x 8, 8 kByte of SRAM, and 2 kByte of data EEPROM. The device also provides 27 interrupt sources with eight priority levels, one Peripheral Hub Unit with eight parallel access paths, and two data pointers. These resources support interrupt-driven control, data acquisition, communications, and programmable signal-processing tasks. The 62 GPIOs make the CY8C3666AXI-202 suitable for devices requiring numerous external connections, including service robots and embedded control systems. Its 100-TQFP package provides substantially more I/O than smaller microcontroller packages while retaining a conventional leaded footprint that can be assembled using standard surface-mount production methods. Operating voltage information available from distributor results identifies a 5.50 V maximum device rating, but detailed electrical limits still require confirmation in the manufacturer datasheet. Typical embedded applications include service-robot control, industrial interface modules, sensor-heavy control boards, programmable input and output systems, and compact consumer equipment. Designers should preserve the peripheral routing and pin constraints of the PSoC 3 architecture, verify the unused pins and power requirements against the datasheet, and confirm that the selected development toolchain supports the CY8C36xx device family. This page consolidates the verified manufacturer and distributor details for the CY8C3666AXI-202 and separates documented specifications from unavailable pricing, pin-level data, and regulatory details. It also provides practical application and design guidance for evaluating the MCU before committing a PCB layout or production order.

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CY8C3846AXE-175 - 48MHz 8-bit PSoC 3 MCU | Infineon
CY8C3846AXE-175

CY8C3846AXE-175 - 48MHz 8-bit PSoC 3 MCU | Infineon

Infineon Technologies CY8C3846AXE-175 is an 8-bit PSoC 3 CY8C38xx programmable system-on-chip microcontroller operating at 48 MHz, with 64 KB of embedded flash memory, in a 100-pin TQFP package measuring 14 x 14 mm. The device accepts a 0.5 V to 5.5 V operating-voltage range and combines an 8051-compatible MCU with programmable mixed-signal and digital resources. A microcontroller is a semiconductor integrated circuit containing a processor core, nonvolatile program memory, data memory, and peripherals on one die. In the broader IC hierarchy, the CY8C3846AXE-175 belongs to the embedded-microcontroller category and provides a compact platform for combining control logic with analog functions. Its 8051 architecture and PSoC 3 family position it between simple fixed-function controllers and higher-performance 32-bit microcontrollers. The principal verified features include a 48 MHz operating frequency, 64 KB of flash organized as 64K x 8 bits, 8-bit processing, and a 100-TQFP gull-wing package. Distributor records also identify 2.5 V, 3.3 V, and 5 V operating options for this device family. Its 100 terminals provide a substantial number of external connections compared with smaller 8-, 16-, or 32-pin microcontroller packages, supporting integration into control and mixed-signal systems that require numerous I/O resources. The CY8C38xx architecture combines an 8051-compatible core with programmable analog blocks, digital blocks, and programmable system resources. This enables designers to consolidate functions that might otherwise require separate analog and digital ICs. The 64 KB flash capacity provides sufficient on-chip storage for embedded firmware, while the 48 MHz clock rate supports responsive control and measurement routines. However, it remains an 8-bit MCU rather than a 32-bit processor, so workloads requiring large data movement, complex operating systems, or high computational bandwidth may benefit from a more capable platform. Typical uses include industrial control panels, building automation modules, sensor interfaces, motor and power-control systems, consumer appliances, and compact embedded instruments. The high pin count can reduce external glue when a design needs numerous GPIO, communication, control, or analog connections. Firmware and board validation remain essential because peripheral availability, routing, and operating conditions depend on the selected PSoC configuration. Designers should use the manufacturer datasheet for the definitive pin map, electrical limits, programming requirements, and exposed-pad connection details. Layout planning should preserve the required decoupling structure, provide clean grounding for sensitive analog measurements, and route high-speed or switching signals away from precision analog inputs. Firmware should also include startup and brownout behavior appropriate to the selected supply range. This product record consolidates verified distributor specifications, current commercial information, and practical engineering guidance. It also distinguishes confirmed facts from unavailable details rather than inferring pin assignments, electrical limits, lifecycle guarantees, or cross-references that are not present in the supplied source data.

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CY8C3865AXA-018 - 8051 PSoC 67MHz 32KB TQFP-100 | Infineon Technologies
CY8C3865AXA-018

CY8C3865AXA-018 - 8051 PSoC 67MHz 32KB TQFP-100 | Infineon Technologies

The Infineon Technologies CY8C3865AXA-018 is an 8-bit PSoC 3 CY8C38xx programmable system-on-chip microcontroller with a 67 MHz operating frequency, 32 KB flash memory, and a 100-pin TQFP package. The device belongs to the PSoC family, which combines configurable analog and digital peripherals with embedded flash memory and a microcontroller in a single integrated circuit. Its operating supply range is listed as 0.5 V to 5.5 V. The CY8C3865AXA-018 is identified as an 8051-compatible 8-bit MCU architecture. Its programmable system-on-chip structure allows selected analog and digital functions to be configured in the device rather than relying on a fixed combination of peripheral functions. This makes the device suitable for embedded designs that need programmable control, signal conditioning, sensing, and communication functions in one package. The 100-pin TQFP package provides a large pin count for external connectivity and mixed-signal implementations. Key cataloged features include 32 KB of flash, a maximum stated clock frequency of 67 MHz, an 8051 instruction-set architecture, and a 0.5 V to 5.5 V supply range. The part is listed with an LFQFP package code by an aggregator, while the distributor listing describes the package as 100-TQFP in a 14 x 14 mm outline. These package descriptions identify the same general 100-pin gull-wing footprint. The PSoC architecture can be used for industrial control, sensor interfaces, consumer products, communications equipment, and embedded control systems. Its combination of configurable peripherals and flash-based program storage allows a compact design to integrate control logic with application-specific analog functions. Device selection should also account for the required peripheral configuration, memory capacity, clocking requirements, voltage range, and the availability of the exact package variant. When designing a board around the CY8C3865AXA-018, use the manufacturer datasheet pin description table to assign every power, ground, programming, clock, analog, and digital signal. The 100-pin package offers many peripheral connections, so accurate pin planning is essential to avoid conflicts between reusable functions. Do not infer a complete pinout from package dimensions or distributor descriptions. This page combines the manufacturer datasheet reference, distributor catalog information, and the available cross-reference candidates for the CY8C3865AXA-018. It also identifies which replacement candidates require additional verification. The exact lifecycle status, detailed electrical limits, programming model, and manufacturer-approved drop-in alternatives should be confirmed before production release.

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CY8C3865AXI-204 - 67MHz 8051 MCU, 32KB Flash | Infineon
CY8C3865AXI-204

CY8C3865AXI-204 - 67MHz 8051 MCU, 32KB Flash | Infineon

Infineon Technologies CY8C3865AXI-204 is an 8-bit PSoC 3 CY8C38xx microcontroller built around a single-core 8051 architecture. It operates up to 67 MHz, provides 32 KB of flash program memory, 8 KB of SRAM and 1 KB of data EEPROM, and is housed in a 100-lead TQFP package measuring 14 mm by 14 mm. The device also includes one Fast USB 2.0 interface, 16 Universal Digital Blocks, a Peripheral Hub Unit, dual data pointers, 27 interrupt sources and eight priority levels. An 8051 microcontroller is an embedded-processing component that combines a general-purpose CPU core, program memory, data memory, peripherals and interrupt handling on one integrated circuit. The CY8C38xx family belongs to the PSoC architecture, placing programmable digital blocks and a peripheral hub beside the 8051 core. This hierarchy—8-bit MCU, 8051 microcontroller, PSoC 3 microcontroller, embedded processor and semiconductor—makes the part suitable for designs requiring flexible digital peripherals and USB connectivity. The principal features combine a 67 MHz operating ceiling with 32 KB of flash, 8 KB of SRAM and 1 KB of EEPROM. Sixteen Universal Digital Blocks support configurable digital functions, while the Peripheral Hub Unit provides eight parallel access paths, or spokes, for peripheral traffic. The integrated Fast USB 2.0 interface is particularly useful for USB-connected control, data-acquisition and human-interface equipment. Four flash protection levels add configurable firmware-control options. The interrupt architecture supports 27 sources and eight priority levels, allowing time-sensitive USB, timer, serial, and programmable digital events to be handled deterministically. Dual data pointers improve access to separate data regions, and the 8051 instruction-set architecture supports a mature embedded-software ecosystem. The part's combination of CPU performance, programmable logic resources and USB reduces the need for separate programmable-logic devices in suitable designs. Typical applications include USB data-acquisition equipment, industrial control panels, programmable serial interfaces, USB-connected test systems, embedded user-interface controllers and compact automation modules. The 100-lead TQFP package exposes substantially more I/O than a small-outline MCU, allowing several peripheral functions to remain active simultaneously. It is also appropriate for industrial control designs where a mature 8051 core, EEPROM and USB coexist on one device. A principal design consideration is firmware and board validation. Before layout approval, engineers should use the manufacturer's pin-description table and application guidance to assign every power, ground, programming, clock and peripheral signal. USB layouts require careful routing of the data lines and placement of the required passive components. Firmware should also account for the separate program Flash, data EEPROM and SRAM regions. This page combines manufacturer-level device facts, package details, practical design guidance, sourcing answers and a structured comparison of related CY8C38xx devices. These engineering views support component selection, firmware planning, PCB design and supply-chain assessment without duplicating the role of the manufacturer datasheet.

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CY8C3865LTI-205 - 67MHz PSoC 3 MCU | Cypress Semiconductor
CY8C3865LTI-205

CY8C3865LTI-205 - 67MHz PSoC 3 MCU | Cypress Semiconductor

The Cypress Semiconductor CY8C3865LTI-205 is an 8-bit PSoC 3 microcontroller in the CY8C38xx family, operating at up to 67 MHz with 32 KB of embedded flash memory and 4 KB of SRAM in a 68-QFN surface-mount package. The device combines an 8051-compatible processor core with programmable digital and analog resources for embedded control, sensing, and communications designs. A programmable system-on-chip, or PSoC, combines a microcontroller core with configurable peripheral blocks on one integrated circuit. The PSoC 3 architecture belongs to the broader microcontroller and embedded-processing hierarchy. By placing programmable digital functions, analog conversion resources, and general-purpose I/O near the processor core, the architecture can reduce external discrete circuitry and allow peripheral behavior to be adapted through device configuration and firmware. The CY8C3865LTI-205 provides a 67 MHz operating speed, 32 KB of flash program memory, and 4 KB of SRAM. Its 8-bit processor architecture and 8051 compatibility make it suitable for control-oriented embedded systems requiring responsive peripheral handling. The 68-QFN package measures 8 mm by 8 mm and supports compact, high-density PCB layouts where the exposed thermal pad and fine-pitch routing requirements can be managed correctly. The CY8C38xx family supports configurable system resources rather than relying on a fixed peripheral map. This approach is useful when a design needs mixed-signal behavior, digital control logic, serial communications, timing functions, or application-specific signal conditioning. Final peripheral performance, voltage limits, temperature ratings, and electrical characteristics should be confirmed against the manufacturer datasheet for the exact ordering code and temperature grade. Typical applications include industrial sensing and control modules, connected equipment, building automation interfaces, compact consumer products, motor and actuator controllers, and IoT edge nodes. In these systems, the MCU can combine control logic with mixed-signal functions while reducing component count. The 32 KB flash capacity is suitable for moderate firmware workloads, while 4 KB of SRAM supports real-time control, protocol stacks, and data buffering. PCB implementation requires careful treatment of the 68-QFN footprint. Place the exposed pad according to the manufacturer land-pattern and thermal-via guidance, maintain the specified solder-mask and paste geometry, and route high-impedance or noise-sensitive signals away from fast-switching and power-conversion nodes. Validate the assembled board for shorts between the fine-pitch leads and exposed pad before programming. This page consolidates the confirmed device identity, memory configuration, package information, sourcing links, engineering-use guidance, and compatibility limits into one practical reference for evaluating the CY8C3865LTI-205 in new embedded designs.

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