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AT28C040-20BC - 4Mbit Parallel EEPROM 200ns 32-CDIP | Microchip
AT28C040-20BC

AT28C040-20BC - 4Mbit Parallel EEPROM 200ns 32-CDIP | Microchip

The Microchip Technology AT28C040-20BC is a 4-Mbit (512K x 8) parallel EEPROM memory IC delivering 200 ns access time in a 32-pin ceramic DIP (0.600 inch, 15.24 mm) windowed package, designed for non-volatile storage in legacy industrial, telecom, and embedded systems. A parallel EEPROM is a non-volatile memory device that retains data without power and is accessed via a parallel data bus (8 bits per cycle in this case). Within the broader memory taxonomy, the AT28C040 sits as a byte-alterable EEPROM, a category below flash memory in write granularity but offering superior endurance for byte-level updates and a write-cycle model that behaves like static RAM without external components. It is part of the AT28C parallel EEPROM family, predecessors of modern serial flash in most new designs but still preferred where in-system reprogrammability, byte-write flexibility, and parallel throughput are required. Key specifications include 4 Mbit density organized as 524,288 words x 8 bits, 200 ns access time, 256-byte page register for page-mode writes, 10 ms write cycle time per byte or page, 4.5 V to 5.5 V single-supply operation, and 440 mW maximum active power dissipation. The device supports read, byte-write, and page-write modes, with internal latch and software data protection mechanisms to prevent inadvertent writes. Technically, the AT28C040 employs a CMOS EEPROM cell array with on-chip high-voltage generation for the Fowler-Nordheim tunneling write process. The integrated 256-byte page register allows up to 256 bytes to be loaded and then written simultaneously, substantially accelerating bulk programming relative to byte-write EEPROMs. The -20 speed grade denotes the 200 ns access time bin, and the BC suffix identifies the 32-pin side-brazed ceramic DIP package with a transparent quartz window for in-circuit UV erasure. Typical applications include legacy industrial controllers, telecom equipment firmware storage, point-of-sale terminals, avionics instrumentation data logging, and embedded boot/program memory where parallel bus interface simplifies host integration. When designing with this part, derate access time for capacitive bus loading and place 0.1 uF decoupling capacitors near the VCC pins. The UV-erasable window allows factory re-programming, but in-system byte-writes do not require erasure. Use the JEDEC-standard 32-CDIP footprint to ensure compatibility with legacy sockets and PCBs. This page synthesizes distributor stock, parametric specifications, drop-in alternative candidates, and practical design notes beyond the datasheet itself, enabling engineers to evaluate, source, and integrate the AT28C040-20BC with confidence.

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AT28C17-15PC - 16Kbit Parallel EEPROM, 150 ns, 28-PDIP | Microchip
AT28C17-15PC

AT28C17-15PC - 16Kbit Parallel EEPROM, 150 ns, 28-PDIP | Microchip

The Microchip AT28C17-15PC is a 16 Kbit parallel Electrically Erasable and Programmable Read-Only Memory (EEPROM) organized as 2,048 words by 8 bits, packaged in a 28-pin PDIP through-hole plastic DIP. The -15 speed grade denotes a 150 ns maximum read access time and operates on a single 4.5 V to 5.5 V supply compatible with standard TTL logic levels. What is a parallel EEPROM? A parallel EEPROM is a non-volatile memory device that provides byte-wide data access (typically 8 bits per read/write cycle) over a parallel bus, as opposed to serial EEPROMs (I2C/SPI/Microwire) that move data one bit at a time. Parallel EEPROMs sit in the system hierarchy as: parallel EEPROM -> non-volatile memory (NVM) -> memory IC -> integrated circuit -> semiconductor. They were widely adopted in 8-bit and 16-bit microprocessor systems before flash memory densities made serial interfaces practical for all but the smallest data sets. Key features include fast read access (150 ns), self-timed byte write cycle of 1 ms typical, internal address and data latches, an internal control timer, automatic clear-before-write, direct microprocessor control, DATA POLLING, and a READY/BUSY handshake output. The device is manufactured on Atmel's reliable nonvolatile CMOS process and supports byte-write operations without external erase cycles, simplifying firmware routines on legacy MCU platforms. From an architectural standpoint, the AT28C17 integrates charge-pump-based high-voltage generation on-chip for the floating-gate cells, eliminating the need for an external VPP programming supply. An internal control timer sequences the write cycle automatically, freeing the host CPU to perform other tasks. WRITE PROTECT (pin WP) hard-disables writes to the upper half of the array, and DATA POLLING on I/O7 lets software detect end-of-write without continuous polling of the BUSY signal. Typical applications include microcontroller-based configuration parameter storage, industrial control firmware scratchpad, point-of-sale terminal non-volatile data logs, legacy 8085/Z80/8051 system memory expansion, and instrumentation calibration tables. The 28-PDIP through-hole package makes the part especially useful for prototype boards, repair replacements for vintage equipment, and educational lab environments where socketed parts are preferred. When designing with this device, observe the 4.5 V minimum supply for reliable byte-write operation and provide proper decoupling (typically 0.1 uF) close to VCC. The READY/BUSY open-drain output requires a pull-up resistor to VCC if used with a wired-OR connection to interrupt logic or other status lines. This page synthesizes distributor pricing, parallel-EEPROM drop-in alternatives (AT28C16 family, M28C16, X28C16), and practical design notes not found in a single place on the manufacturer datasheet.

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AT28C64B-15JC - 64Kbit Parallel EEPROM, 150ns, 32-PLCC | Microchip
AT28C64B-15JC

AT28C64B-15JC - 64Kbit Parallel EEPROM, 150ns, 32-PLCC | Microchip

The Microchip AT28C64B-15JC is a 64-Kbit (8,192 x 8) parallel EEPROM with 150 ns read access time, housed in a 32-pin PLCC (13.97 x 11.43 mm) package and rated for commercial temperature operation. It draws 40 mA active current while delivering 220 mW typical power dissipation, and falls back to a 100 µA CMOS standby current when deselected for low-power system designs. A parallel EEPROM is a non-volatile memory device whose I/O architecture mirrors static RAM (SRAM) for read and write cycles but retains its contents without power. Within the broader memory hierarchy, parallel EEPROMs sit between serial EEPROMs (smaller, slower, fewer pins) and NOR flash (higher density but more complex write/erase sequencing), making them ideal for legacy parallel buses, boot ROM, configuration stores, and parameter tables that demand byte-level writes without an erase step. Key features include automatic page-write operation up to 64 bytes per 10 ms cycle, software data protection (SDP) to lock out inadvertent writes, hardware write protection via the WP pin, and a standard JEDEC-compatible pinout that simplifies design-in. The device operates from a single 5 V supply and supports TTL-compatible inputs and outputs. Architecturally, the AT28C64B uses Microchip's advanced non-volatile CMOS process with on-chip latches for address, data, and control, accessed like static RAM for both read and write cycles. The internal charge pump generates the high-voltage programming supply on-chip, eliminating the external VPP required by legacy EPROMs and simplifying board layout. Typical applications include legacy industrial control firmware storage, communication equipment parameter backup, point-of-sale terminals, set-top box configuration memory, and as a direct replacement for older 27C64/2764 EPROMs in systems requiring in-system reprogrammability without UV erasure. The 32-PLCC JEDEC footprint also suits socketed designs where mechanical compatibility with through-hole PLCC sockets is required. When designing with this part, ensure VCC decoupling with a 0.1 µF ceramic capacitor placed within 5 mm of the supply pin. For reliable page-mode writes, respect the maximum 10 ms write cycle time per 64-byte page and assert WE according to the datasheet timing diagram. The WP pin should be tied to VCC or GND through a defined logic level rather than left floating. This page synthesizes distributor pricing, drop-in JEDEC-compatible alternatives, and practical design considerations not found in the manufacturer datasheet alone, giving engineers a single reference for sourcing, replacement, and board-level implementation of the AT28C64B-15JC.

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AT29C040A-90TU - 4Mbit 5V Parallel Flash 90ns 32-TSOP | Microchip
AT29C040A-90TU

AT29C040A-90TU - 4Mbit 5V Parallel Flash 90ns 32-TSOP | Microchip

The Microchip Technology AT29C040A-90TU is a 4-Mbit (512K x 8) 5-volt-only in-system Flash programmable and erasable read-only memory (PEROM) housed in a 32-pin TSOP (Type I) package, organized as 2048 individually-erasable sectors of 256 bytes each. It supports a parallel interface with a fast 90 ns read access time, a single 4.5 V to 5.5 V supply rail, and single-cycle sector reprogram (erase + program) via internal address and data latches. A Flash memory IC is a type of non-volatile memory that retains stored data when power is removed and supports in-system electrical erasure and reprogramming. The AT29C040A belongs to the NOR Flash family — within the hierarchy non-volatile memory -> Flash memory -> NOR Flash -> parallel NOR Flash -> boot/parameter-storage Flash. NOR Flash provides random byte-level access and execute-in-place capability, which is why it is preferred over NAND for code storage in embedded systems. Key specifications include a 90 ns maximum read access time, a sector program time of approximately 10 ms per 256-byte sector, 2048 eraseable sectors, and an endurance rating of 10,000 write cycles per sector (typical). The device also features hardware and software data protection, low-power CMOS operation, and a JEDEC-standard 32-pin TSOP footprint compatible with surface-mount assembly lines. Operating current is typically 50 mA active and 100 µA standby, supporting battery-friendly embedded designs. The AT29C040A employs a sector-based architecture where any sector can be erased and reprogrammed in a single internal operation without external erasure. The on-chip state machine handles timing and verification internally, offloading complexity from the host microcontroller. Compared with byte-programmable legacy EEPROM, the 256-byte sector architecture dramatically reduces software overhead for firmware updates while still supporting parameter storage when only a few bytes change. Typical applications include embedded firmware storage for industrial controllers, automotive infotainment boot Flash, networking equipment firmware, point-of-sale terminals, and any system requiring in-system reprogrammable non-volatile memory. It is also widely used as a 5V-compatible data-logging buffer where EEPROM density is insufficient. When designing with this device, ensure VCC decoupling with a 0.1 µF ceramic capacitor placed within 5 mm of the supply pin, and respect the maximum 10 ms sector-program timing in your firmware state machine. Because it is a 5 V part, do not connect directly to a 3.3 V MCU without a level translator on the address and data lines. This page synthesizes distributor pricing from DigiKey and Mouser, drop-in Microchip alternatives in the same 32-TSOP footprint, and practical design notes that complement the manufacturer datasheet.

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AT32F403ARGT7 - 240MHz Cortex-M4F MCU 1MB Flash | Artery
AT32F403ARGT7

AT32F403ARGT7 - 240MHz Cortex-M4F MCU 1MB Flash | Artery

The Artery Technology AT32F403ARGT7 is a 32-bit ARM Cortex-M4F microcontroller with FPU running at up to 240 MHz, featuring 1 MB embedded Flash and 224 KB SRAM, housed in a 64-pin LQFP (10x10 mm) surface-mount package. A microcontroller unit (MCU) is a single-chip embedded processor that integrates a CPU core, memory, and peripherals such as timers, ADCs, and communication interfaces onto one die. Within the embedded systems hierarchy, the MCU sits below application processors (MPU/SoC) and above simple logic ICs, and this part belongs to the general-purpose high-performance MCU family built on the ARM Cortex-M architecture. Key differentiating specifications include the 240 MHz maximum core clock (well above the 72-168 MHz class of typical STM32F1/F4 counterparts), 1 MB of embedded Flash with sLib secure library protection, 17 timers, and 51 GPIO pins. Operating voltage spans 2.6 V to 3.6 V and the junction temperature range is -40C to +105C, covering industrial and automotive-adjacent environments. Technically, the AT32F403A series combines a single-precision floating-point unit (FPU) and DSP instructions with an advanced process node that Artery leverages to reach 200-240 MHz computing speeds. Peripherals include 3 x 12-bit ADCs, 20 communication interfaces including USBFS, multiple USART/SPI/I2C/CAN blocks, and a flexible clock control mechanism that supports both built-in and external Flash execution. Typical applications include FPV drone flight controllers, industrial motor control, communication modules and gateways, and consumer electronics where STM32F103-class pinouts are required at higher performance and lower cost. The AT32 family emerged as a proven STM32 alternative during the chip shortage and is widely used as a pin-to-pin upgrade path. Design consideration: because the 240 MHz core draws more dynamic current than 72 MHz Cortex-M3 parts, budget decoupling capacitance and PCB power-plane copper accordingly, and verify that your flash accelerator/wait-state settings match the higher clock in firmware. This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not found together in the manufacturer datasheet.

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AT32F407VGT7 - 240MHz Cortex-M4 MCU 1MB Flash | Artery
AT32F407VGT7

AT32F407VGT7 - 240MHz Cortex-M4 MCU 1MB Flash | Artery

The Artery AT32F407VGT7 is an ARM 32-bit Cortex-M4 microcontroller with FPU and DSP instructions, operating up to 240 MHz, integrating up to 1 MB dual-bank Flash and 224 KB SRAM in a 100-pin LQFP package (14x14 mm, 0.5 mm pitch). A microcontroller (MCU) is a single-chip computer containing a processor core, program memory (Flash), data memory (SRAM), and a rich set of on-chip peripherals. The Cortex-M4 family targets high-performance embedded applications that require deterministic real-time control, DSP for audio/signal processing, and a single-precision Floating Point Unit (FPU) for efficient math. Within the power-management and embedded hierarchy, this part sits as: Cortex-M4 -> ARMv7-M architecture -> 32-bit MCU -> embedded processor -> semiconductor. The AT32F407 line is engineered by Artery as a cost-effective alternative to mainstream M4 families, with faster core clocks and dual-bank Flash for safer firmware updates. Key features include 240 MHz core speed, single-precision FPU, DSP extensions, 1 MB Flash (dual-bank option with sLib security library), 224 KB SRAM, three 12-bit ADCs (3 MSPS), two 12-bit DACs, USB 2.0 FS host/device/OTG, 10/100 Ethernet MAC, two CAN 2.0B interfaces, SDIO, FSMC, and up to 17 timers. Communication peripherals include I2C, SPI, I2S, USART and UART, totalling up to 21 communication interfaces. Operating voltage is 2.6 V to 3.6 V with an industrial -40C to +105C junction temperature range. The architecture combines an M4 core with tightly-coupled SRAM, multi-layer AHB/APB buses, and a DMA controller for low-CPU-overhead data movement. The dual-bank Flash supports in-application programming (IAP) without halting execution, and the sLib security region protects intellectual property. The 240 MHz clock enables deterministic control loops and DSP workloads that are typically out of reach for lower-end MCUs. Typical applications include industrial motor control (BLDC, FOC drives), USB/Ethernet connected gateways, USB Type-C power-delivery controllers, consumer audio with DSP effects, human-machine interface (HMI) panels with LCD via FSMC, drones/flight controllers, and IoT edge nodes. The combination of CAN, Ethernet and USB makes it well-suited to automotive aftermarket and industrial automation products. When designing with this MCU, ensure the external quartz or resonator load capacitors match the AT32 reference design (typically 8-20 pF), and place the on-board 1uF/100nF decoupling network within 3 mm of every VDD/VDDA pin. Always configure the option-byte write protection for production units to lock the bootloader region from accidental erase during field updates. This page synthesises distributor pricing, drop-in alternatives, and practical design notes that complement the manufacturer datasheet DS_AT32F407_V2.04_EN.pdf and the LCSC stock snapshot.

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AT32UC3A0512-ALUT - 32-bit AVR32 MCU 66MHz 512KB Flash LQFP-144
AT32UC3A0512-ALUT

AT32UC3A0512-ALUT - 32-bit AVR32 MCU 66MHz 512KB Flash LQFP-144

The Microchip Technology AT32UC3A0512-ALUT is a high-performance, low-power 32-bit AVR32 RISC microcontroller based on the UC3 A0 system-on-chip architecture, operating at frequencies up to 66 MHz and packaged in a 144-pin LQFP (20x20 mm). The device integrates 512 KB of Flash and 64 KB of SRAM, combined with a rich set of peripherals including a 10/100 Ethernet MAC, full-speed USB 2.0 with embedded host capability, I2S audio interface, and a stereo audio D/A converter. An MCU (Microcontroller Unit) is a single-chip computer that combines a processor, memory, and programmable I/O. The 32-bit AVR32 UC3 family belongs to the broader category of embedded microcontrollers -> RISC processors -> semiconductors -> integrated circuits, designed for cost-sensitive embedded applications with particular emphasis on low power consumption, high code density, and high computational throughput. The AVR32 core implements a compact single-cycle RISC instruction set including DSP extensions, with the AT32UC3A0512 reaching approximately 1.38 DMIPS/MHz. Key specifications include 1.65 V to 3.6 V supply voltage operation, 66 MHz maximum CPU clock, 512 KB on-chip Flash program memory, 64 KB SRAM, integrated 10/100 Mbps Ethernet MAC, USB 2.0 full-speed On-The-Go controller, multi-layer AHB bus architecture, and a built-in audio DAC with I2S interface. The device supports external memory bus interfaces and provides extensive connectivity for embedded networking, audio, and human-machine-interface designs. The AVR32 UC3 core uses a Harvard-style architecture with separate instruction and data paths to the Flash and SRAM subsystems, enabling single-cycle instruction fetch and high deterministic interrupt latency. The integrated audio DAC and I2S make the part particularly well-suited for consumer audio applications, while the Ethernet MAC and USB OTG target industrial connectivity and embedded host stacks. The architecture includes read-modify-write atomic bit manipulation and DSP instruction extensions for signal-processing workloads. Typical applications include industrial Ethernet gateways, USB audio peripherals, point-of-sale terminals, smart energy metering, motor control front-ends, and embedded HMI panels. The combination of high-performance 32-bit compute with on-chip audio and networking peripherals enables the application to consolidate multiple discrete ICs into a single chip, reducing BOM cost and PCB footprint. Design considerations for this device include thermal management of the 20x20 mm LQFP-144 footprint, careful PCB layout for USB and Ethernet differential pairs, and adequate decoupling near the multiple VDD pins. Engineers should consult the AVR32 UC3 Technical Reference Manual for detailed peripheral programming guidance and the datasheet's electrical characteristics section before committing to a layout. This page synthesizes distributor pricing, an Octopart inventory view, Microchip cross-reference guidance, and practical design notes not found in the manufacturer datasheet, supporting both initial component evaluation and long-term re-purchase decisions.

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AT32UC3C0512C - 32-bit AVR MCU 512KB Flash 66MHz | Microchip
AT32UC3C0512C

AT32UC3C0512C - 32-bit AVR MCU 512KB Flash 66MHz | Microchip

The Microchip (formerly Atmel) AT32UC3C0512C is a 32-bit AVR32 UC3 microcontroller delivering 66 MHz CPU performance with 512 KB Flash and 64-68 KB SRAM, housed in a 144-pin LQFP (20x20 mm) industrial-grade package. The device is engineered for industrial and automotive-grade control applications, with hardware dedicated to fast communication, motor control, and deterministic real-time response. A built-in single-precision floating-point unit (FPU) and DSP instruction extensions accelerate math-heavy control loops without burdening the core. An MCU (microcontroller unit) is a compact, self-contained computer on a single IC that integrates a CPU core, non-volatile program memory, working RAM, and a rich set of peripherals. The AT32UC3C0512C belongs to the 32-bit MCU category within the broader hierarchy of microcontrollers, embedded processors, and finally semiconductors. It targets motor-control and industrial-automation designs where deterministic latency and high analog integration matter more than raw clock speed. Key features include 512 KB Flash program storage, on-chip SRAM, full-speed USB 2.0 with OTG, 10/100 Ethernet MAC with MII/RMII, multiple USART (SPI/LIN mode capable), an Inter-IC Sound (I2S) controller, up to 16-bit ADC, and FlashVault code protection for IP security. A peripheral event system and 4-channel DMA offload the CPU, while an interrupt controller with autovector handling keeps latency predictable under heavy event load. The architecture pairs the AVR32 RISC core (including DSP and SIMD-friendly instructions) with hardware dedicated to power-conversion feedback loops: high-resolution PWM, motor-control timers, and synchronized analog comparators. This combination enables field-oriented control (FOC) algorithms and tight torque/velocity loops on a single chip, eliminating the need for external DSPs. Typical applications include industrial motor drives (BLDC, PMSM, stepper), automotive body and chassis ECUs, factory-automation PLCs, smart-grid metering, USB-to-Ethernet gateways, and embedded audio interfaces. The wide operating temperature range and FlashVault protection also make it suitable for secure connected nodes and industrial IoT edge controllers. Designers should size external decoupling carefully (1 µF + 100 nF near each supply pin), keep analog and digital ground returns separated, and use the on-chip DMA to keep ISR latency bounded. For motor-control firmware, the Atmel AVR32 framework and ASF provide production-ready FOC and PFC reference implementations. This page synthesizes Microchip product-page information, datasheet doc9166, distributor stock data, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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AT32UC3C0512C-ALUT - 32-bit AVR UC3 512KB Flash MCU | Microchip
AT32UC3C0512C-ALUT

AT32UC3C0512C-ALUT - 32-bit AVR UC3 512KB Flash MCU | Microchip

The Microchip Technology AT32UC3C0512C-ALUT is a 32-bit AVR UC3 C-series microcontroller featuring a 66 MHz AVR32 RISC core, 512 KB of in-system programmable Flash and 64 KB SRAM, housed in a 144-pin LQFP (20x20 mm, industrial -40C to +85C) package supplied in tray. The device targets industrial and automotive control applications with a focus on fast communication interfaces and motor control peripherals. An MCU (Microcontroller Unit) is a single-chip computer that integrates a CPU core, program and data memory, peripherals, and I/O. The AT32UC3 family belongs to the broader taxonomy of embedded microcontrollers within the semiconductor category, designed for deterministic, real-time control tasks. The 'AVR32 UC3 C' label specifies the 32-bit AVR32 RISC architecture (32-bit -> microcontroller -> embedded processor -> semiconductor), making it suitable for code-density-critical and signal-processing workloads. Key features include a 1.5 Msps 12-bit ADC (8 channels with dual sample-and-hold for simultaneous current/voltage sensing), single or dual CAN interfaces, Full-Speed USB 2.0 with On-The-Go host capability, NAND Flash and SDRAM external memory controllers, PWM channels with dead-time insertion for motor drive, and an MII/RMII 10/100 Ethernet MAC. The integrated media-independent interface (MII) and reduced MII (RMII) provide direct PHY connectivity without external glue logic. The architecture pairs a high-performance AVR32UC core with a Peripheral DMA Controller (PDCA) and a multi-layer High-Speed Bus Matrix, enabling parallel data movement between ADC, PWM, communication peripherals and memory without CPU intervention. This is essential for high-bandwidth motor control and audio streaming loops. The Nanotrace debug interface supports both JTAG and single-pin aWire debug through the RESET pin. Typical applications include industrial motor drives (BLDC/PMSM FOC), automotive body and chassis controllers, USB audio peripherals, CAN-connected sensor nodes, and Ethernet-enabled industrial gateways. The AT32UC3C0512CAU-ALUT variant is the Audio licensed-firmware IP version of the same silicon. When designing with this MCU, plan Pinout 144-LQFP PCB escape carefully because of the high pin count and 0.5 mm pitch; allocate at least four PCB layers with dedicated power and ground planes. Ensure the brown-out detector and watchdog timer are enabled for automotive-grade reliability. This page synthesizes Microchip datasheet extracts, same-package UC3C family variants, and design considerations not consolidated in the datasheet alone.

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AT32UC3C0512C-ALZR - 32-bit AVR MCU 512KB Flash Automotive LQFP-144 | Microchip
AT32UC3C0512C-ALZR

AT32UC3C0512C-ALZR - 32-bit AVR MCU 512KB Flash Automotive LQFP-144 | Microchip

The Microchip Technology (formerly Atmel) AT32UC3C0512C-ALZR is an AVR32 UC3 C-series 32-bit RISC flash microcontroller integrating 512KB of Flash, 68KB of SRAM, and a hardware floating-point unit, housed in a 144-pin LQFP package (20x20 mm) and qualified to AEC-Q100 grade 1 for automotive control applications. It runs at 66 MHz core clock, supports 3.3V and 5V operating voltages, and is optimised for fast serial interfaces and field-oriented motor control. A microcontroller (MCU) is a single-chip computer that combines a CPU core, program memory (Flash), volatile memory (SRAM), and a rich set of on-chip peripherals (timers, communication, ADC, PWM, GPIOs). Within the broader system hierarchy, this part belongs to embedded microcontroller → 32-bit MCU → RISC MCU → automotive-grade MCU → semiconductor IC. The UC3 C-series specifically targets motor-control and industrial-control subsystems requiring deterministic PWM generation, fast ADC sampling, and CAN/LIN connectivity. Key features of the AT32UC3C0512C-ALZR include a 7-channel peripheral event controller, a 4-channel 12-bit ADC capable of simultaneous dual-sample conversion, programmable analog comparators with window detection, a Multi-purpose Timer Counter (TC) module with quadrature decoding, full-speed USB 2.0 device, two CAN controllers, four USARTs, and FlashVault code-protection for secure firmware IP. The hardware FPU accelerates single-precision math used in field-oriented control (FOC) algorithms. The device uses a Harvard-cache architecture with separate code and data memories to maximise throughput, and integrates dedicated motor-control peripherals such as the Pulse Width Modulation Controller (PWMC) and Quadrature Decoder (QDEC). AEC-Q100 grade 1 qualification ensures operation across -40C to +125C and resilience to automotive EMC profiles, making the part suitable for under-hood applications. Typical applications include industrial servo drives, automotive HVAC blower and pump controllers, BLDC and PMSM motor control, power-tool inverter control, field-oriented control of three-phase motors, and CAN/LIN node ECUs. The combination of FPU and motor-control peripherals removes the need for an external DSP in low-power-control designs. When designing with this MCU, budget Flash and SRAM carefully because the part does not include external memory bus, so all firmware must fit in the on-chip 512KB Flash and 68KB SRAM. Use the on-chip QTouch library for capacitive touch acquisition, and add CAN bus transceivers (e.g., MCP2551) and 12V-tolerant ESD diodes on automotive harnesses. This page synthesises distributor pricing from DigiKey, Mouser and Octopart, identifies same-brand and cross-brand drop-in alternatives, and adds practical design notes not found in the manufacturer datasheet, giving engineers a one-stop engineering summary.

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AT40K10-2AJC - 10K Gate FPGA w/ FreeRAM, 84-PLCC | Microchip
AT40K10-2AJC

AT40K10-2AJC - 10K Gate FPGA w/ FreeRAM, 84-PLCC | Microchip

The Microchip Technology AT40K10-2AJC is a 5V, 10K to 20K gate AT40K/KLV family Field Programmable Gate Array (FPGA) IC featuring 4608 logic elements, 576 flip-flops, 62 user I/O pins, and built-in FreeRAM distributed SRAM in a 84-pin LCC (J-Lead) package. Per the ATMEL Corporation datasheet (67 pages, 1Mb), this part targets high-performance coprocessor and glue-logic applications where system speeds up to 100 MHz and on-chip multipliers faster than 50 MHz (10 ns pipeline cycle) are required. The '-2' speed grade combined with industrial temperature grading makes the part suited to demanding embedded designs. An FPGA (Field Programmable Gate Array) is a reconfigurable digital integrated circuit that combines programmable logic blocks, programmable interconnect, and configurable I/O on a single die. FPGAs sit above standard logic ICs and below ASICs in the design hierarchy: they offer ASIC-class parallelism and throughput without the NRE mask costs, making them ideal for low-to-mid volume designs, prototyping, hardware acceleration, and custom bus interfaces. The AT40K family adds unique FreeRAM distributed SRAM blocks to the classical FPGA fabric, allowing byte-wide memory access and efficient data-path implementation directly in the fabric. Key features include internal tri-state bus capability for implementing shared-bus architectures without external glue logic, dedicated hardware multipliers (>50 MHz), distributed SRAM via FreeRAM, and JTAG-based in-system programming. The 62 user I/Os support 5V CMOS/TTL signalling and provide flexible voltage translation across mixed-voltage system designs. The 84-pin J-leaded ceramic/PLCC body eases soldering, inspection, and rework during development. Architecturally, the AT40K10 builds on a fine-grained symmetric array with 4-input look-up tables (LUTs) and dual-port FreeRAM cells that double as logic or memory depending on user configuration. The LUT-based fabric delivers efficient state-machine and arithmetic implementation while the FreeRAM supports FIFOs, register files and small cache structures. The 5V core plus tolerant I/O allow direct interfacing to legacy 5V microcontrollers and DSPs. Typical applications include high-performance coprocessor interfacing to 8/16-bit microcontrollers, ASIC prototyping, glue-logic replacement in telecom and industrial control, and parallel DSP pipelines. The FreeRAM blocks make the part especially attractive for register-file and small-FIFO implementation in DSP glue. The 84-LCC J-lead package and the long-lifecycle nature of AT40 silicon also suit long-term industrial programs. When designing with the AT40K10-2AJC, ensure the JTAG chain follows ATMEL's BSDL ordering and provide adequate decoupling (>=0.1uF + 10uF bulk) close to each VCC/IO bank. Confirming timing constraints with the datasheet is critical because the 100 MHz system speed grade assumes worst-case commercial PVT conditions and may derate under industrial temperature operation. This page synthesizes distributor pricing, drop-in alternatives inside the AT40K family, and practical design notes that go beyond what the manufacturer datasheet alone provides.

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AT40K10AL-1BQU - 10K Gate 3.3V AT40KAL FPGA | Microchip 144-LQFP
AT40K10AL-1BQU

AT40K10AL-1BQU - 10K Gate 3.3V AT40KAL FPGA | Microchip 144-LQFP

The Microchip Technology (formerly Atmel) AT40K10AL-1BQU is a CMOS Field Programmable Gate Array from the AT40KAL series, integrating 10,000 system gates with up to 50,000 usable gates and 576 logic cells in a 144-pin LQFP package. It operates from a 3.0V to 3.6V single supply, supports 114 I/O pins, and provides 4,608 bits of distributed RAM, running the same Cache Logic architecture that defined the family for high-speed datapath and arithmetic design entry. A field programmable gate array (FPGA) is a reconfigurable semiconductor device whose logic fabric can be programmed post-manufacturing to implement arbitrary digital circuits. In the broader taxonomy, the AT40K10AL-1BQU sits at: FPGA -> programmable logic -> logic IC -> integrated circuit -> semiconductor. Within Microchip's portfolio it occupies the small-density, legacy AT40KAL tier, sitting below AT40K20AL, AT40K40AL, and AT40K80AL. Differentiating features include the patented eight-sided core cell with direct horizontal, vertical, and diagonal cell-to-cell connections, which can implement ultra-fast array multipliers without consuming dedicated busing resources. The device advertises a 1 ns combinatorial pin-to-pin delay class, 2.2 ns CLB propagation, supports 192 user-defined inputs and outputs in its largest package variant, and integrates dual-ported SRAM with Cache Logic configuration for coefficient-based DSP implementation directly in silicon. Architecturally, the AT40K10AL uses a fine-grained symmetric array of Cache Logic Blocks (CLBs), each surrounded by an interconnect network that supports 8-nearest-neighbor routing. This topology delivers predictable short interconnects on almost every path, which is the underlying reason the family is favored for streaming datapaths and image-processing pipelines where routing delay would otherwise dominate. Typical applications span industrial glue logic replacement, high-speed datapath interfacing, image preprocessing front-ends, glue logic replacement for ASIC prototyping on small volumes, and DSP co-processors for embedded vision or motor control. The wide 3.3V IO tolerance lets it bridge 5V legacy buses with level shifters. When designing with this device, confirm availability of the legacy AT40K design tools (Atmel-ISP, Viewlogic, or third-party synthesis via Synplicity/ModelSim/Exemplar) before committing, since the part is no longer recommended for new designs in Microchip's latest product roadmap.

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AT45DB041D-SU - 4Mbit SPI DataFlash 66MHz 8-SOIC | Renesas
AT45DB041D-SU

AT45DB041D-SU - 4Mbit SPI DataFlash 66MHz 8-SOIC | Renesas

The Renesas Electronics (formerly Atmel) AT45DB041D-SU is a 4-megabit serial-interface DataFlash NOR memory with SPI and RapidS modes up to 66 MHz, supplied from a single 2.7 V to 3.6 V rail and housed in an 8-pin SOIC (150 mil, EIAJ standard) package. DataFlash is a category of nonvolatile memory that organizes storage as uniform pages rather than the sectors used by conventional serial NOR flash. Within the memory hierarchy it sits AT Series in the storage IC stack as a low-pin-count alternative to parallel NOR and small NAND, ideally placed between an MCU and any removable storage. The AT45DB041D-SU has 4,325,376 bits organized as 2,048 pages of either 264 bytes (binary mode) or 256 bytes (standard mode), giving 528 KB or 512 KB depending on the configuration selected at design time. Key specifications include a RapidS serial interface compatible with SPI modes 0 and 3 at 66 MHz maximum clock frequency, single-cycle page programming, an industry-leading endurance of 100,000 program/erase cycles per page, a minimum 20-year data retention, and two independent 264-byte SRAM data buffers that allow simultaneous read/write of the host side while a page is being programmed in the background. The device also offers a 128-byte security register, page erase, block erase, and chip erase. Technically the device uses a dual-buffer architecture in which the two SRAM buffers decouple the SPI bus from internal program/erase timing, so the host can stream the next data block at full 66 MHz while the previous page programs in the background. The single 2.7 V to 3.6 V supply allows direct connection to 3.3 V MCU rails without a level shifter. Typical applications include digital voice recorders, image storage buffers in digital cameras, program code and data storage in 8/16/32-bit embedded controllers, DSP coefficient storage, and battery-powered data loggers. The dual-buffer architecture makes it especially attractive where continuous streaming is required without flow control. When designing with this device, choose either the 256-byte or 264-byte page mode at design time, since the two modes use different opcodes and configuration register settings and are not interchangeable after firmware is locked in. Use a 1 kΩ to 10 kΩ pull-up on the CS pin to avoid spurious selection during power-up. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet. Pricing referenced is as of 2026-10-06.

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AT45DB041E-SHN2B-T - 4Mbit 1.65V SPI DataFlash 85MHz | Renesas
AT45DB041E-SHN2B-T

AT45DB041E-SHN2B-T - 4Mbit 1.65V SPI DataFlash 85MHz | Renesas

The Renesas AT45DB041E-SHN2B-T is a 4-Mbit (512K x 8) serial-interface DataFlash memory with an extra 128 kbits, operating from 1.65V to 3.6V and packaged in an 8-pin SOIC (EIAJ 208mil). It uses a three-wire SPI interface (SI, SO, SCK plus active-low CS) at up to 85 MHz clock rate, with an additional RapidS mode for higher throughput. A DataFlash is a type of NOR flash memory that combines a serial SPI interface with a dual SRAM buffer architecture. The hierarchy is: NOR flash -> serial flash -> DataFlash. DataFlash devices fill the niche between small EEPROMs and larger parallel NOR flashes, optimizing for low pin count, low voltage, and byte/ page granular access. The AT45DB041E family is widely used for code shadowing, parameter storage, and data logging in battery-powered and embedded systems. The AT45DB041E features dual SRAM buffers (256/264 bytes per page, configurable), a 4-Mbit main memory organized as 2048 pages of 256 bytes (or 2112 pages x 264 bytes), hardware and software write protection, sector erase, page program, and deep power-down with typically under 5 uA standby current. Per the manufacturer datasheet, the SPI clock can reach 85 MHz in standard mode and the device supports Page Erase, Block Erase (4 KB), and Sector Erase (64 KB) commands. Architecturally the AT45DB041E integrates an SPI controller, command decoder, write state machine, and high-voltage generation circuits on a single die, with built-in ECC on each page. The continuous read mode enables sequential access without page boundary delays, simplifying firmware code-shadow implementations where the host copies flash content into RAM at boot. Typical applications include firmware storage in IoT sensors, data logging in industrial metering, voice recorders, image storage in low-cost camera peripherals, and consumer wearables requiring small, low-power non-volatile storage. The wide 1.65 V to 3.6 V range supports both Li-ion and 3.3 V systems. When designing with this part, ensure the CS signal is properly controlled to avoid partial writes, and consider adding a small decoupling capacitor (100 nF) close to VCC. The SOIC-8 EIAJ 208mil footprint has different pin spacing than a standard 150mil SOIC-8 - verify your PCB land pattern before placing the part. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing an engineer-focused decision aid for selecting the AT45DB041E in new designs.

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AT45DB041E-SSHN2B-T - 4Mbit SPI DataFlash, 85MHz, 8-SOIC | Renesas
AT45DB041E-SSHN2B-T

AT45DB041E-SSHN2B-T - 4Mbit SPI DataFlash, 85MHz, 8-SOIC | Renesas

The Renesas AT45DB041E-SSHN2B-T is a 4 Mbit (4,194,304 bits) serial-interface Flash memory organized as 2,048 pages of 256 bytes (or 264 bytes in binary page mode), housed in an 8-pin SOIC-N 150 mil package supplied on tape and reel. It supports SPI modes 0 and 3 plus the RapidS high-speed variant, operating at up to 85 MHz clock frequency across a 1.65 V to 3.6 V wide Vcc range, and is specified from -40 °C to +85 °C. The part belongs to the Adesto AT45DB DataFlash family now owned and re-marketed by Renesas Electronics Corporation after its 2020 acquisition of Dialog Semiconductor's Adesto memory line. A DataFlash is a serial NOR Flash memory optimized for sequential, page-oriented access rather than random byte access. Compared with standard SPI NOR, it adds on-chip dual SRAM buffers that enable simultaneous read-while-write and erase-while-write operation, dramatically reducing processor overhead for data logging. DataFlash sits in the broader hierarchy as a sub-class of NOR Flash -> non-volatile memory -> semiconductor memory, complementary to denser but slower NAND Flash. Key features include 4 Mbit density in a 256/264-byte page architecture, dual on-chip SRAM buffers (256/264 bytes each), hardware and software write protection, an absolute write protection pin, power-on reset, and JEDEC manufacturer/device ID read-back. The 85 MHz RapidS interface enables fast boot and continuous data capture, while the wide 1.65 V to 3.6 V supply range allows direct connection to 1.8 V, 2.5 V, and 3.3 V rails without level shifters. The AT45DB041E-SSHN2B-T uses a 3-wire SPI interface (SI, SO, SCK) plus chip select, accessed through standard op-codes for page read, page program, block erase, sector erase, chip erase, and buffer read/write. Its page-erase granularity is as small as 256 bytes, much finer than the 4 KB to 64 KB sectors of competing SPI NOR parts, simplifying software wear-leveling for data-logging use cases. Typical applications include digital voice recording, image storage, firmware shadowing, IoT sensor data capture, and industrial data logging. Its wide Vcc range and small footprint also suit battery-powered wearables, smart meters, and point-of-sale terminals where the SPI host is a low-power MCU. When designing with this part, observe the Vcc decoupling requirement of 0.1 µF placed within 5 mm of the VCC pin, hold CS high during power-up until Vcc stabilizes, and avoid simultaneous buffer-1 read and buffer-2 write operations to the same page address without arbitration in firmware. This page synthesizes distributor pricing, drop-in alternatives from the same AT45DB041E family and competing SPI Flash parts, and practical design notes not collected in the manufacturer datasheet alone.

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AT45DB081D-SU - 8Mbit SPI DataFlash, 66MHz, 2.7-3.6V | Renesas
AT45DB081D-SU

AT45DB081D-SU - 8Mbit SPI DataFlash, 66MHz, 2.7-3.6V | Renesas

The Renesas AT45DB081D-SU is an 8-megabit (1 Mbyte) serial-interface DataFlash memory organized as 4,096 pages of 256 bytes (or 264 bytes in binary mode), housed in an 8-pin SOIC (EIAJ) package. It operates from a single 2.7V to 3.6V supply and supports RapidS serial interface clock rates up to 66 MHz, with SPI modes 0 and 3. Two user-configurable page sizes (256 or 264 bytes per page) enable flexible firmware/data partitioning for embedded designs. A DataFlash is a serial NOR flash architecture optimized for high-density byte-level storage with built-in SRAM buffers and page-oriented programming. Compared with parallel NOR flash, DataFlash drastically reduces pin count (typically 8 pins versus 28-48), simplifies PCB layout, and lowers system cost. DataFlash sits within the broader hierarchy of non-volatile memory: serial flash > NOR flash > flash memory > non-volatile semiconductor memory. Its two-buffer architecture allows simultaneous read-while-write, enabling efficient logging in data-acquisition and firmware-update workflows. Key features of the AT45DB081D-SU include 4,096 page-erase sectors, single-cycle reprogram (erase + program) per page, a hardware page-size configuration lock via the binary page-size bit, deep power-down mode reducing ICC to a few microamps, and JEDEC-standard manufacturer/device ID read commands. The device supports 100,000 erase/write cycles per page minimum and a 20-year data retention guarantee. The AT45DB081D-SU uses a 264-byte SRAM buffer plus a second 264-byte buffer to enable read-while-write. Each main-memory page transfers to a buffer in 80 microseconds (typical). The RapidS SPI engine supports Mode 0 and Mode 3, allowing interoperability with most microcontrollers and DSPs without external logic. Typical applications include digital audio storage, firmware shadowing in set-top boxes and printers, data logging for industrial sensors, EFR32/SAMD MCU external program memory, and GPS/navigation waypoint storage. The wide 2.7-3.6V supply range supports both 3.3V and battery-backed 3V designs. When designing with the AT45DB081D-SU, place a 0.1 microfarad decoupling capacitor adjacent to the VCC pin and keep SPI traces short to avoid ringing above 66 MHz. Confirm that your host controller supports mode-0 SPI with a clock divider that does not exceed 66 MHz; many 8-bit MCUs require peripheral clock prescalers below 1:1. This page synthesizes distributor pricing, drop-in same-package alternatives, and PCB/design guidance not found in the manufacturer datasheet. Compared with bare Octopart/DigiKey listings, this view includes same-package alternatives that share the SOIC-8 (EIAJ) footprint and explains parametric deltas.

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AT45DB321C-TC - 32Mbit SPI DataFlash, 28-TSOP | Microchip
AT45DB321C-TC

AT45DB321C-TC - 32Mbit SPI DataFlash, 28-TSOP | Microchip

The Microchip Technology AT45DB321C-TC is a 32-megabit (4 MB) serial-interface DataFlash memory IC supporting SPI and RapidS (4-wire SPI) modes at up to 40 MHz clock frequency, housed in a 28-pin TSOP-I package. It operates from a 2.7 V to 3.6 V single supply and delivers typical active read current below 15 mA, with standby and deep power-down modes reducing quiescent draw to microamp levels for battery-aware designs. A DataFlash is a page-oriented serial NOR-flash memory that divides the array into 8192 pages of 528 bytes (or 8192 pages of 512 bytes in binary page mode), with two SRAM buffers of 528 bytes each enabling single-clock rewrite-in-place operations. Unlike generic SPI NOR flash, DataFlash supports simultaneous read-while-write via these buffers, making it a hybrid between raw flash and small EEPROM. Architecturally it sits inside the NOR flash -> serial flash -> DataFlash hierarchy, and within power management it functions as non-volatile storage rather than a regulator. AT45DB321C refers specifically to the 32-Mbit density in the AT45DB series, which spans 2-Mbit through 128-Mbit densities. Key features include dual SRAM data buffers (528 bytes each), built-in hardware page-erase and block-erase engines, a 128-byte security register, JEDEC-standard SPI mode 0/3 support, and a RapidS mode for sustained throughput approaching byte-per-clock efficiency. The device also integrates a sequential read command that streams data with a single opcode, plus deep power-down at less than 10 uA typical. Industrial temperature grade (-40C to +85C) is offered for embedded and commercial applications. Typical applications include firmware and bootloader storage in microcontroller systems, data logging in industrial sensors, voice/audio sample storage, image storage in mid-resolution camera modules, and configuration parameter storage in networking equipment. The 528-byte page size is convenient for audio frames and small sector writes. Designers should note that the 'TC' suffix denotes the TSOP-I commercial-grade package, distinct from the lead-free 'CC' (BGA) and industrial 'TI' versions. This datasheet synthesizes distributor pricing, drop-in compatibility information, and application design notes beyond the manufacturer datasheet summary.

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AT80C32X2-RLTUM - 8-Bit 8051 ROMless MCU, 40/20MHz, 44-VQFP | Microchip
AT80C32X2-RLTUM

AT80C32X2-RLTUM - 8-Bit 8051 ROMless MCU, 40/20MHz, 44-VQFP | Microchip

The Microchip (formerly Atmel) AT80C32X2-RLTUM is an 8-bit ROMless 80C51/80C52-compatible microcontroller IC operating at 40 MHz (or 20 MHz in the lower-voltage range) in a 44-pin VQFP (10x10 mm) package. It features four 8-bit I/O ports (32 I/O lines), three 16-bit timer/counters, a full-duplex UART, and 256 bytes of on-chip scratchpad RAM. As a ROMless derivative of the AT89C family, external program memory is required, making this part ideal for memory-intensive or field-upgradeable firmware designs. A microcontroller (MCU) is a single-chip computer containing a CPU, memory, and peripherals. The 8051 architecture is a foundational 8-bit ISA widely used in industrial control, automotive body electronics, and consumer appliances. Within the taxonomy: 8051 -> 8-bit MCU -> microcontroller -> embedded IC -> semiconductor. The AT80C32X2 belongs to the ROMless segment of this family, where code is fetched from external EPROM/Flash rather than internal non-volatile memory, simplifying code development during prototyping. Key features include dual clock domain support (0 to 40 MHz at 5 V, 0 to 20 MHz at 3 V), six interrupt sources with two priority levels, on-chip analog watchdog, power-saving idle and power-down modes, and an extended 16-bit program counter supporting up to 64 KB of external code space. The -RLTUM suffix designates the 44-pin VQFP industrial-temperature (-40C to +85C) operating range, lead-free RoHS-compliant package. Architecturally, the AT80C32X2 uses CMOS technology with static design, allowing the clock to be stopped without losing internal state. The four-port parallel I/O structure provides 32 flexible bidirectional lines, and the on-chip oscillator supports external crystal, ceramic resonator, or external clock source. The non-volatile code execution model (external ROM) suits designs where code must be updated in the field without re-spinning silicon. Typical applications include industrial control systems, motor drive interfaces, sensor data acquisition nodes, building automation controllers, and legacy 8051 firmware migration designs where code density or revision history exceeds internal Flash capacity. It is also well-suited as a drop-in replacement for legacy Atmel 80C32 systems requiring an RoHS-compliant upgrade path. When designing with this device, ensure the EA pin is tied low to force external code fetch (ROMless), and provide proper bus-cycles timing accounting for any external memory wait states. The VQFP-44 footprint requires standard surface-mount assembly with the exposed-pad thermal pad soldered to a copper pour for thermal dissipation in enclosed industrial enclosures. This page synthesizes verified distributor stock data, same-brand drop-in VQFP-44 alternatives, and practical 8051 design notes not consolidated in any single source.

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AT89C51AC3-S3SUM - 8-Bit 80C51 MCU, 64KB Flash, 60MHz | Microchip
AT89C51AC3-S3SUM

AT89C51AC3-S3SUM - 8-Bit 80C51 MCU, 64KB Flash, 60MHz | Microchip

The Microchip Technology (formerly Atmel) AT89C51AC3-S3SUM is a high-performance 8-bit 8051-family microcontroller with 64KB of in-system programmable flash, 2KB boot flash, 2KB EEPROM, and 2048 bytes of ERAM, offered in a 52-pin PLCC package rated for the industrial temperature range. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and a rich set of programmable peripherals on one die. The 8051 architecture, originally introduced by Intel in 1980 and now widely licensed through Microchip/Atmel, sits in the broader product hierarchy: microcontroller -> embedded MCU -> 8-bit MCU -> CISC processor -> semiconductor. The AT89C51AC3 belongs to the 89C family (flash-based 8051), which is itself a derivative of the original 80C51, an industry standard for decades of legacy embedded designs. Key features include a 60 MHz maximum core clock (or 20 MHz in X2 mode), full MCS-51 instruction-set compatibility, three-level program memory lock, ISP/IAP (in-system and in-application programming), a 10-bit ADC, dual hardware PWM channels, a hardware watchdog, and a CAN 2.0B controller that distinguishes this part from the older AT89C51/C52. The 52-pin PLCC (plastic leaded chip carrier) gives designers 36 programmable I/O lines plus dedicated analog, PWM, and CAN pins, with a JEDEC-standard J-lead footprint that supports both socketed and surface-mount assembly. Typical applications include industrial automation controllers, motor drives (via the hardware PWM and 10-bit ADC), automotive body and chassis ECUs (CAN bus), smart metering, building automation, and any brownfield 8051 design that needs to retain legacy code while adding modern flash memory and on-chip peripherals. The 5V industrial-grade supply simplifies integration into legacy 5V rails, and the AEC-Q100-style temperature range suits outdoor and automotive environments. When designing with the AT89C51AC3, ensure that the SST89E516RD-style bootstrap loader pins are connected to a UART for ISP, and observe the 5V supply range. Because the part uses the 8051 CISC core, throughput-sensitive paths should leverage the X2 mode or migrate code to the faster SFR access patterns available in the AC3 silicon revision.

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AT89C51CC01UA-SLSUM - 8-bit CAN MCU, 32KB Flash, 40MHz, PLCC-44 | Microchip
AT89C51CC01UA-SLSUM

AT89C51CC01UA-SLSUM - 8-bit CAN MCU, 32KB Flash, 40MHz, PLCC-44 | Microchip

The Microchip Technology AT89C51CC01UA-SLSUM is an enhanced 8-bit 80C51 AT89C CAN microcontroller with 32 KB of in-system programmable Flash, 2 KB of boot Flash, 2 KB of EEPROM, and 1.2 KB of internal RAM, operating up to 40 MHz (20 MHz) in X2 mode) and supplied in a 44-pin PLCC (16.6 x 16.6 mm) package. It is the first member of the Microchip/Atmel CAN family of 8-bit MCUs designed specifically for CAN network nodes. A CAN microcontroller is a microcontroller that integrates a hardware Controller Area Network (CAN) peripheral on-chip, allowing the device to communicate directly on CAN bus segments used in automotive, industrial, and building-automation networks. The AT89C51CC01UA belongs to the broader 8051 (MCS-51) family, which is one of the longest-lived 8-bit MCU architectures; devices in this hierarchy range from bare 8051 cores through 8051 derivatives, embedded microcontrollers, and on to system-on-chip devices that integrate peripherals such as CAN, ADC, and PWM. Key features include a fully static 8051 core, 32 programmable I/O lines, three-level program memory lock for code protection, an endurance rating of 1,000 write/erase cycles per Flash sector, hardware CAN 2.0B controller, ISP/IAP via bootloader, and an industrial operating temperature range of -40 C to +85 C. The PLCC-44 package provides a robust through-hole-style surface-mount footprint that is easy to prototype with standard PLCC sockets. Typical applications include automotive body and chassis ECUs, industrial CAN-based sensor/actuator nodes, HVAC control modules, building-automation gateways, and CAN-to-UART bridges. The integrated CAN peripheral is one of the three most differentiated capabilities of this device, making it attractive in designs that need a single-chip CAN node without an external CAN controller. When designing with the AT89C51CC01UA, ensure the oscillator circuit follows the manufacturer reference design and that adequate decoupling (typically 100 nF ceramic per VCC pair plus bulk 10 uF) is placed close to the supply pins. The PLCC-44 socket should be of the proper polarization type to avoid pin reversal damage during field service. This page synthesizes verified distributor data, drop-in compatible parametric and behavioral notes, and engineering design considerations not found in the manufacturer datasheet. Pricing is shown as of 2026-10-07 and reflects real-time inventory from authorized distributors.

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AT89C51CC03CA-RDTUM - 8-bit CAN MCU, 64KB Flash, 40MHz | Microchip
AT89C51CC03CA-RDTUM

AT89C51CC03CA-RDTUM - 8-bit CAN MCU, 64KB Flash, 40MHz | Microchip

The Microchip Technology AT89C51CC03CA-RDTUM is an 8-bit 80C51-core microcontroller with an integrated full CAN (Controller Area Network) controller, 64KB of in-system programmable Flash, 2KB of boot Flash, 2KB of SRAM, and a 40MHz maximum CPU clock (6.66 MIPS), housed in a 64-pin VQFP (10x10) tray-packaged package. The integrated CAN 2.0A/B controller, large Flash complement, and automotive-friendly 3.0V to 5.5V supply range make it a drop-in workhorse for industrial CAN nodes, automotive body and chassis ECUs, and embedded networking appliances where MCS-51 firmware migration matters. An 8-bit CAN MCU is a microcontroller that combines the deterministic, low-overhead 8051 instruction set with an on-chip CAN protocol engine for in-vehicle and industrial networks. It sits in the embedded hierarchy between classic 8051 microcontrollers (no networking) and 32-bit CAN microcontrollers (more performance, more power, more code complexity). The AT89C51CC03CA belongs to Microchip's AT89C51CC03 family, which extends the legacy AT89C51 line by adding CAN, ISP/IAP, and a hardware bootloader for field-upgradeable nodes. Key features include 64KB of in-system programmable Flash with 1000 write/erase cycles, 2KB SRAM for stack and frame buffers, 2KB boot Flash with dedicated bootloader, 2048 bytes of EEPROM for non-volatile parameters (CAN node ID, calibration), 32 programmable I/O lines, three 16-bit timer/counters, a programmable hardware watchdog, full CAN 2.0A/B controller, hardware SPI, UART with enhanced framing, and X2 mode for up to 40MHz equivalent throughput from a 20MHz crystal. The wide 3.0V to 5.5V operating range supports both 3.3V and 5V CAN transceivers and bus rails. Architecturally the device uses the standard 12-clock-per-instruction MCS-51 core and adds dual Flash banks plus a true hardware CAN state-machine rather than a bit-banged software stack. In X2 mode, every peripheral cycle is divided by two, allowing the CPU to perform one instruction per external clock cycle and reach 300ns instruction timing at 20MHz external crystal, doubling effective throughput without redesigning firmware. Typical applications include CAN nodes in industrial fieldbus and DeviceNet systems, automotive body controllers, HVAC and instrument-cluster slaves, sensor and actuator modules with CAN connectivity, building-automation gateways, and any embedded 8051 firmware base that needs an in-place migration path to CAN. The 64-pin VQFP (10x10) footprint is the same land pattern as the rest of the AT89C51CC03 family, which simplifies PCB reuse. When designing with this device, ensure that the unused I/O pins are configured as outputs or pulled up to reduce supply current; ground the unused CAN RX input when CAN is not used. Verify that the CAN baud-rate prescaler, oscillator accuracy, and bit-timing configuration support the chosen bus length, because these directly affect sample point and EMC robustness. This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design considerations for the AT89C51CC03CA-RDTUM not found in the manufacturer datasheet alone.

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AT89C51CC03CA-RLTUM - 8-bit 8051 MCU 64KB Flash CAN VQFP-44 | Microchip
AT89C51CC03CA-RLTUM

AT89C51CC03CA-RLTUM - 8-bit 8051 MCU 64KB Flash CAN VQFP-44 | Microchip

The Microchip AT89C51CC03CA-RLTUM is an 8-bit 8051-family microcontroller with an integrated full CAN (Controller Area Network) controller, 64 KB of in-system programmable Flash, 2.25 KB of RAM, and 2 KB of EEPROM, housed in a 44-pin VQFP package. It executes the standard 80C51 instruction set at up to 40 MHz (X1 mode), and in X2 mode a 20 MHz external crystal reaches a 300 ns machine cycle, doubling effective throughput for compute-bound nodes. An 8051 microcontroller is a CISC 8-bit MCU architecture originally introduced by Intel in 1980 and now widely produced as a license-free core by several vendors. The 8051 sits within the broader hierarchy of microcontrollers -> embedded controllers -> semiconductor ICs and is widely deployed in industrial, automotive, and consumer nodes where deterministic behavior, low cost, and a mature toolchain outweigh the need for high-performance 32-bit cores. Devices with on-chip CAN are specifically positioned for automotive body and chassis networks, industrial fieldbus, and building-automation backbones where a CAN 2.0B controller simplifies bus arbitration. The AT89C51CC03CA integrates a full CAN 2.0B controller (15 message objects, programmable bit timing up to 1 Mbit/s), three 16-bit timer/counters, a hardware watchdog, dual UARTs, SPI, and a 10-bit ADC. With 1,000 write/erase cycle endurance on Flash, three-level program memory lock, and 4 KB of boot Flash for in-application re-programmability over UART or CAN, the device targets field-upgradable nodes and CAN bootloader implementations. The 32 programmable I/O lines on the 44-pin VQFP expose most of the 8051 peripheral set without external glue logic. Typical applications include CAN nodes in automotive body ECUs (door modules, seat controllers, lighting), industrial CANopen / DeviceNet slave nodes, HVAC controllers, building automation gateways, and sensor hubs that must communicate over an ISO 11898 bus. The combination of 64 KB Flash, 2 KB EEPROM for parameter storage, and an on-chip CAN controller lets engineers build a complete CAN node with no external protocol IC. The wide 3.0 V to 5.5 V supply range also supports both 3.3 V and legacy 5 V CAN transceivers without level shifting. When designing with this MCU, ensure the CAN bus termination, slew-rate, and common-mode voltage ratings of the external transceiver (such as MCP2551 or ATA6560) match the target network. The VQFP-44 thermal resistance is modest; at 40 MHz the core is well within junction limits, but a ground plane and decoupling close to VCC/AVCC pins are required to keep the ADC reference stable. This page synthesizes distributor pricing, drop-in VQFP-44 alternatives within the AT89 family, and practical design notes that go beyond the manufacturer datasheet.

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AT89C51CC03CA-SLRUM - 8-bit 8051 CAN MCU 64KB Flash 40MHz | Microchip
AT89C51CC03CA-SLRUM

AT89C51CC03CA-SLRUM - 8-bit 8051 CAN MCU 64KB Flash 40MHz | Microchip

The Microchip (formerly Atmel) AT89C51CC03CA-SLRUM is an 8-bit 8051-compatible microcontroller featuring an integrated full CAN 2.0B controller, 64KB of in-system programmable Flash program memory (including 2KB boot Flash), 2KB EEPROM data Flash, and 2KB of internal SRAM, packaged in a 44-pin PLCC (16.6x16.6 mm). It runs at up to 40MHz in standard mode (6.66 MIPS) and supports the X2 clock-prescaler mode where 20MHz external crystal achieves 300ns instruction cycles. What is an 8051 CAN microcontroller? The 8051 is a CISC 8-bit microcontroller architecture originally introduced by Intel in 1980 and now maintained by NXP/Microchip/Atmel. A CAN-enabled variant integrates the Bosch CAN 2.0B controller on-chip, allowing the MCU to communicate on Controller Area Network bus lines without an external transceiver, while a small external CAN transceiver provides physical-layer signaling. Within the broader hierarchy, this part is a microcontroller > embedded controller > semiconductor IC. The 'CA' suffix denotes the 5V industrial variant; the 'SLRUM' suffix denotes the 44-PLCC package with industrial-grade operating temperature. Key features include 36 programmable I/O lines, full-duplex enhanced UART, SPI, dual 16-bit timers, three-level program memory lock, 1000 write/erase cycle endurance, hardware watchdog timer, dual data pointers for faster XRAM access, and 8-channel 10-bit ADC. The integrated CAN controller with 15 message objects eliminates the need for a separate CAN peripheral. Power-on reset and brown-out detection are built in. Architecturally, the device is built on a standard 8051 core enhanced with peripherals mapped into the SFR space. The 64KB code space is linear (no banking) and the 2KB EEPROM (HEF) is mapped into a dedicated data region with a small page buffer for write operations, allowing byte-level non-volatile storage without external EEPROM chips. Typical applications include industrial CAN-bus nodes (sensor interfacing, HVAC controls), automotive body controllers (comfort modules, lighting controllers), motor control via CANopen or DeviceNet, building automation nodes, and embedded instrumentation. The integrated CAN and EEPROM make it particularly attractive for distributed industrial nodes that must store calibration data locally. When designing with this part, allocate PCB area carefully: the PLCC-44 footprint is 16.6 mm square with J-leads, larger than QFP-44 alternatives. Decouple VCC with 100 nF + 10 µF close to the pins, and route the CANINT stack on a twisted pair with 120 Ω termination at each bus end. The boot-loader UART pins (RXD/TXD) must be accessible for ISP firmware updates. This page synthesizes current distributor stock and pricing, parametric drop-in alternatives from the same 8051/CAN family, and practical design notes (PLCC-44 footprint, CAN bus termination, EEPROM endurance) not found in the standalone datasheet.

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AT89C51RD2-SLSUM - 8-bit 80C51 Flash MCU, 64KB, 60MHz, 44-PLCC | Microchip
AT89C51RD2-SLSUM

AT89C51RD2-SLSUM - 8-bit 80C51 Flash MCU, 64KB, 60MHz, 44-PLCC | Microchip

The Microchip AT89C51RD2-SLSUM is an 8-bit CMOS flash microcontroller from the 80C51 family, delivering 60 MHz CPU performance with 64 KB of on-chip flash memory and 2048 bytes of RAM in a 44-pin PLCC (16.6x16.6 mm) package. It operates from 2.7 V to 5.5 V across the industrial temperature range and integrates peripherals including three 16-bit timers, a programmable counter array, UART, SPI, hardware multiplier, dual data pointers, and a four-level interrupt priority controller. The flash memory supports both parallel and serial In-System Programming (ISP) with boot loader support and 100K erase/write cycle endurance. What is an 8051 microcontroller? The 8051 is a classic Harvard-architecture 8-bit CISC microcontroller originally introduced by Intel in 1980. It belongs to the broader category of microcontrollers -> single-chip microcomputers -> embedded processors -> semiconductor devices. Modern 8051 cores are widely used because they combine deterministic interrupt response, low power consumption, abundant code memory, and a simple instruction set, making them ideal for industrial control, consumer appliances, and legacy equipment migration. Key features of the AT89C51RD2-SLSUM include 64 KB single-voltage flash program memory, 2 KB SRAM with XRAM expansion to 1024 bytes, an 8-bit clock prescaler with two power-saving modes (Idle and Power-down), and a built-in hardware multiplier/divider. The flash endurance reaches 100 K erase/write cycles with 10-year data retention, and the chip supports 6-clock or 12-clock selectable operation modes. The architecture uses a 6-clock machine cycle per instruction (configurable to legacy 12-clock mode), giving it 1.8-2x performance advantage over the original 80C51. ACPI-based Idle and Power-down modes reduce current to under 50µA in Power-down with external interrupts or watchdog wake-up, suiting battery-backed designs. The hardware multiply/divide unit executes MUL AB in 4µs and DIV AB in 8µs at maximum frequency. Typical applications for the AT89C51RD2-SLSUM include industrial PLCs, motor control interfaces, smart metering, vending machines, HVAC thermostats, security alarm panels, and embedded white-goods controllers. The wide voltage range and ISP capability make it a strong choice for upgrading AT89S52 designs without PCB rework. Designers choose this part for its deterministic interrupt latency (six-way vectored interrupts) and proven toolchain (Keil C51, SDCC) compatibility. When designing with this device, ensure the ISP UART pins are not latched during reset to enable in-circuit firmware updates. The boot loader uses the PSEN pin to enter boot mode at reset - tie this pin high through a 10K resistor for normal application operation. Reference Microchip application note for ISP boot loader timing constraints. This page synthesizes distributor pricing, drop-in replacement candidates, and practical design notes for the AT89C51RD2-SLSUM not found in any single manufacturer document.

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