CY8C3646AXE-178 - 8-Bit 48MHz 8051 MCU | Infineon Technologies
MPN: CY8C3646AXE-178 ✓ ActiveCY8C3646AXE-178 Overview
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.
Drop-in alternatives for CY8C3646AXE-178 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
No drop-in alternatives available for this product.
Request AlternativesCY8C3646AXE-178 Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit 8051 microcontroller |
| Product Family | PSoC 3 CY8C36xx |
| CPU Architecture | 8051 |
| Maximum Frequency | 48 MHz |
| Flash Memory | 64 KB (64K x 8) |
| Operating Voltage Range | 0.5 V to 5.5 V |
| Nominal Supply Levels | 3.3 V and 5 V |
| Core Width | 8 bit |
| Package | 100-pin TQFP (14 mm x 14 mm) |
| Mounting Type | Surface mount |
| Automotive Classification | Automotive |
| RoHS Status | unknown |
| REACH Status | unknown |
| AEC-Q100 Status | unknown |
CY8C3646AXE-178 100-pin tqfp (14 mm x 14 mm) Pin Configuration Guide
Pin configuration for CY8C3646AXE-178 (100-pin tqfp (14 mm x 14 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for CY8C3646AXE-178.
Refer to the datasheet for full pin configuration.
Typical Applications
CY8C3646AXE-178 is suitable for 6 applications: Automotive Body Control Module, Industrial Sensor Node, Actuator and Motor Interface Controller, Communication Gateway, Consumer Appliance Controller, Connected IoT Peripheral.
Automotive Body Control Module
The CY8C3646AXE-178 fits automotive body-control tasks that require an 8-bit 8051 core, 48 MHz processing speed, and 64 KB of embedded flash. The 100-pin TQFP package provides a large number of external connections for switches, lamps, actuators, diagnostic interfaces, and communication peripherals. Designers should place the device in a module architecture where its -178 ordering suffix has been confirmed for the required automotive qualification and environmental grade. The 0.5 V to 5.5 V range supports compatible mixed-voltage peripherals, but every external signal must satisfy the individual pin limits. Firmware can use the flash for application code, calibration tables, diagnostics, and communication state machines. Final qualification still requires manufacturer documentation, EMC validation, and confirmation of all peripheral resources.
Recommended
Industrial Sensor Node
The 48 MHz 8051-based CY8C3646AXE-178 can serve as the control core of a configurable industrial sensor node that needs local flash and deterministic embedded processing. Its 64 KB program memory is suitable for acquisition routines, protocol handling, filtering, logging, and device-management code, while the 100-pin package exposes substantially more I/O than a small-package MCU. The verified 0.5 V to 5.5 V operating range can support low-voltage sensing and 3.3 V or 5 V interface sections when the schematic respects each pin's limits. Because exact RAM, ADC, timer, and communications specifications are not available in the supplied records, the application should be conditioned on those resources being confirmed. Industrial qualification, isolation, surge immunity, and long-term availability require separate review.
Recommended
Actuator and Motor Interface Controller
CY8C3646AXE-178 is appropriate for embedded actuator-control logic requiring more timing headroom than a basic 8-bit device. The 48 MHz CPU can execute closed-loop control, fault monitoring, PWM sequencing, and communications routines, while the 64 KB flash stores application logic and calibration values. Its 100-pin TQFP package provides ample connections for position sensing, command inputs, driver enables, and status reporting. The verified operating range of 0.5 V to 5.5 V allows integration with compatible low-voltage sensing and 3.3 V or 5 V logic. Engineers must verify timer outputs, PWM resolution, ADC performance, and pin multiplexing in the manufacturer documentation. Suitable power stages, protection networks, thermal management, and safety diagnostics should be designed around the actual motor or actuator load.
Recommended
Communication Gateway
The CY8C3646AXE-178 can serve as a low-cost protocol gateway or embedded communications controller when an 8-bit architecture is sufficient. Its 48 MHz operating frequency provides useful throughput for framed protocols, UART handling, packet routing, and supervisory tasks, while 64 KB of flash accommodates firmware, protocol tables, and configuration data. The 100-pin TQFP package leaves sufficient I/O for multiple serial channels, status indicators, reset supervision, and expansion buses. The verified 3.3 V and 5 V nominal levels can align with industrial interface hardware if signal tolerances are confirmed. Exact UART, CAN, USB, timer, and memory resources are not specified in the supplied data and must be checked before assigning interfaces. EMC, isolation, surge protection, and protocol-specific certification remain system-level requirements.
Recommended
Consumer Appliance Controller
The CY8C3646AXE-178 is suitable for appliance and embedded consumer control boards that benefit from 8-bit code density, 48 MHz processing, and 64 KB flash. It can coordinate user inputs, display segments, relays, sensors, and communications while operating across a verified 0.5 V to 5.5 V range. The 100-pin TQFP footprint simplifies access to a broad pin count but requires more PCB area than compact MCU packages, so it is most attractive when adequate I/O is genuinely needed. Designers should confirm SRAM, timers, ADC channels, and pin assignments before finalizing the board. Failsafe behavior, brownout handling, ESD protection, surge suppression, thermal margins, and production programming must be addressed at system level. The -178 suffix and automotive classification should not be mistaken for a consumer-specific qualification.
Recommended
Connected IoT Peripheral
CY8C3646AXE-178 can act as the local controller in a connected IoT peripheral that needs persistent program storage and low-cost 8-bit processing. The 64 KB flash can hold networking state, device identity, configuration, diagnostics, and application logic, while the 48 MHz CPU manages sampling and communication timing. Its 100-pin package offers enough I/O for sensors, status LEDs, local controls, and a network bridge. The verified 0.5 V to 5.5 V range supports low-voltage digital sections, although power consumption in active and sleep modes remains unknown from the supplied information. Before design release, verify the exact radio or network interface, memory map, peripheral availability, and low-power requirements. Regulatory approvals for the finished wireless product remain separate from the microcontroller component qualification.
Recommended
Recommended Products Summary
Engineering reference data for CY8C3646AXE-178 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product |
|---|---|
| Package | 100-pin TQFP (14 mm x 14 mm) |
| Brand | Infineon Technologies |
| Product Type | 8-bit 8051 microcontroller |
| Product Family | PSoC 3 CY8C36xx |
| Maximum Frequency | 48 MHz |
| Flash Memory | 64 KB (64K x 8) |
| Operating Voltage Range | 0.5 V to 5.5 V |
| Core Width | 8 bit |
| Nominal Supply Levels | 3.3 V and 5 V |
Key Differentiators
- Distinctive 48 MHz processing speed within an 8-bit design (vs AT80C51SND1C-ROTUL)
- 64 KB integrated program memory (vs TMS320F28067PZT)
- Broad verified operating-voltage range (vs AT80C51SND1C-ROTUL)
Design Notes
Design the supply network around the verified 0.5 V to 5.5 V operating range, but do not assume that every I/O pin accepts the full range. Review each VDD and signal pin's absolute maximum and recommended operating limits in the manufacturer datasheet. Place local bulk and high-frequency decoupling capacitors close to the device's power pins, with the final values selected from the reference design and stability requirements.
Reserve a clean, uninterrupted ground system beneath and around the 100-pin TQFP because the package provides many signal transitions at up to 48 MHz. Follow the manufacturer's footprint dimensions and paste-land pattern exactly. Route high-speed or sensitive interfaces away from switching nodes and noisy power-conversion stages, and provide adequate copper thermal area without compromising the recommended solder mask and assembly process.
Do not substitute a similarly named 8051 or 100-pin MCU without checking every pin and peripheral. The verified alternatives search produced AT80C51SND1C-ROTUL in an 80-pin TQFP and TMS320F28067PZT with a different processor architecture, so neither establishes drop-in compatibility. Validate package pins, power rails, clock configuration, reset, programming interface, peripheral mapping, and automotive qualification before redesigning the PCB.
Compliance Information
The supplied distributor data describes the device as automotive but does not provide explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements. Compliance must be extracted from the manufacturer product page and supporting declarations.
