C8051T631-GM

Overview

The C8051T631-GM is an 8-bit microcontroller from the Silicon Labs C8051T series, featuring a pipelined 8051 core operating at a maximum frequency of 25 MHz. It integrates 8 kB of EPROM program memory and 768 bytes of RAM within a 20-pin QFN package measuring 4 x 4 x 0.95 mm. The device supports standard interfaces including one SPI channel, one I2C channel, and one UART. It operates on a typical supply voltage of 3 V across a temperature range of -40 °C to +85 °C.

Feature Summary

• Pipelined 8051 architecture delivering high instruction throughput
• Integrated mixed-signal capabilities with multiple communication peripherals
• Compact surface-mount packaging for space-constrained designs

Applications

• Embedded control systems requiring compact form factors
• Industrial monitoring applications with serial communication needs
• Consumer electronics utilizing low-power microcontrollers

Procurement Notes

Verify the specific suffix GM indicates the QFN-20 package configuration when sourcing. Confirm the component status as active or obsolete through official Silicon Labs channels prior to procurement planning. Ensure compatibility with existing PCB footprints matching the 4x4mm dimensions.

Selection Notes

Select this model for applications necessitating a balance between code capacity and physical size. The 8 kB memory suits moderate firmware requirements while the 20-pin interface limits GPIO availability. Evaluate if the integrated analog peripherals meet system signal conditioning needs without external components.

Part Context

This component belongs to the C8051T family of fully integrated mixed-signal system-on-chip solutions. These devices combine a high-speed 8051-compatible CPU with extensive on-chip digital and analog resources. The T-series typically targets cost-sensitive embedded markets requiring standalone functionality.

Replacement Considerations

Consult official documentation for direct pin-to-pin substitutes within the C8051T series. Verify memory sizes and package compatibility before considering alternative part numbers.