C8051T635-GM

Overview

The C8051T635-GM is a mixed-signal microcontroller from Silicon Labs, featuring an 8051 core with pipelined architecture. It operates at up to 25 MHz and includes 2 kB byte-programmable EPROM code memory and 768 bytes of internal data RAM. The device supports a supply voltage range of 1.8 V to 3.6 V and functions within a temperature range of -40 °C to +85 °C. Digital peripherals include one UART, one SMBus, one SPI, four 16-bit timers, and a Programmable Counter Array (PCA). It utilizes a 20-pin QFN package.

Feature Summary

• Features a high-speed 8051 CPU core with pipelined instruction execution for efficient processing.
• Includes on-chip debug circuitry supporting full-speed, non-intrusive in-system debugging via the C2 interface.
• Integrates flexible digital communication interfaces including UART, SMBus, and SPI.
• Provides multiple clock sources, including two internal oscillators for crystal-less operation.

Applications

• Battery-powered devices requiring low-power operation
• Industrial control systems
• Consumer electronics

Procurement Notes

Verify the specific ordering suffix matches the required package type and temperature grade. Confirm that the 2 kB EPROM capacity meets application requirements, as other variants in this series offer different memory sizes. Ensure the 1.8 V to 3.6 V supply voltage range aligns with the system design. Check for any RoHS compliance markings if environmental regulations apply.

Selection Notes

Select this component when a compact 20-pin solution with moderate program memory is needed. The absence of an ADC distinguishes it from other members of the C8051T63x family. Consider the pipelined 8051 core performance relative to standard architectures. Evaluate the available digital peripherals against interface requirements before choosing alternative models with additional analog features.

Part Context

This part belongs to the C8051T63x series of mixed-signal microcontrollers by Silicon Labs. These devices are designed as standalone system-on-a-chip solutions, integrating essential analog and digital peripherals alongside the CPU. The series offers various memory configurations and package options to suit different embedded applications.

Replacement Considerations

Check for C8051T630 through C8051T634 variants if additional analog peripherals like ADC or DAC are required. Verify pin compatibility and software compatibility when considering cross-series replacements.