C8051T635-GMR

Overview

The C8051T635-GMR is an 8-bit microcontroller from Silicon Labs, part of the C8051T63x series. It features a high-speed pipelined 8051 core operating at up to 25 MHz with 25 MIPS throughput. The device includes 2 kB of byte-programmable EPROM and 768 bytes of internal data RAM. Key peripherals include four 16-bit timers, a programmable counter array (PCA) with three capture/compare modules, one UART, one SMBus interface, and one SPI interface. It operates on a supply voltage of 1.8 V to 3.6 V within a temperature range of -40 °C to +85 °C.

Feature Summary

• High-performance 8051 core with pipelined architecture for fast instruction execution
• Integrated non-volatile byte-programmable EPROM for code storage
• Flexible digital peripheral set including UART, SMBus, and SPI interfaces
• On-chip debug circuitry supporting full-speed, non-intrusive in-system debugging

Applications

• Industrial control systems requiring robust 8-bit processing
• Battery-powered devices utilizing low-power clock modes
• Embedded applications needing in-circuit reprogrammable memory
• Sensor interfacing using timer and serial communication protocols

Procurement Notes

Verify the specific suffix 'GMR' indicates tape-and-reel packaging when sourcing components. Confirm that the target application supports the 1.8 V to 3.6 V supply voltage range. Ensure the design accommodates the QFN-20 package dimensions and thermal requirements. Cross-reference the exact part number against the manufacturer's current datasheet revision to validate pinout and electrical characteristics before finalizing procurement.

Selection Notes

Select this component for designs prioritizing code density and reprogrammability via EPROM over larger Flash capacities. It is suitable for cost-sensitive applications where 2 kB of program memory suffices. Consider the QFN-20 package for compact board layouts. Evaluate the need for analog peripherals, as this specific model lacks the ADC and DAC found in other variants of the same family.

Part Context

This device belongs to the C8051T63x mixed-signal MCU family by Silicon Labs. These microcontrollers are designed for standalone system-on-a-chip solutions, integrating essential digital and analog functions. The C8051T635 variant specifically focuses on digital I/O and communication interfaces, omitting the high-speed ADC and DAC present in the T630/T632/T634 models.

Replacement Considerations

Direct replacements within the same package and feature set include C8051T634-GMR or C8051T632-GMR if analog peripherals are required. For identical digital-only specifications, verify availability of C8051T635-GM in alternative packaging.