C8051T631-GMR

Overview

The C8051T631-GMR is an 8-bit microcontroller from Silicon Labs, based on the 8051 core architecture. It features 8 kB of EPROM program memory and 768 bytes of RAM. The device operates at a maximum clock frequency of 25 MHz and supports a supply voltage range of 1.8 V to 3.6 V. It is housed in a 20-pin QFN package with dimensions of 4 mm x 4 mm x 0.95 mm. The component includes one 16-bit PWM unit, one SPI channel, one I2C channel, and one UART channel. Operating temperatures range from -40°C to +85°C.

Feature Summary

• Integrates a high-speed 8051 CPU with pipelined instruction execution for efficient processing.
• Provides flexible digital interface connectivity through integrated SMBus, SPI, and UART peripherals.
• Includes a dedicated 16-bit pulse width modulation unit for precise control applications.

Applications

• Embedded systems requiring compact form factors
• Industrial control modules
• Battery-powered devices utilizing low-voltage operation

Procurement Notes

Verify the specific suffix against official documentation to confirm package type and temperature grade. Ensure compatibility with existing design constraints regarding pin count and memory size. Cross-reference the manufacturer's current status page as availability may vary. Confirm regulatory compliance requirements such as RoHS standards prior to integration into final products.

Selection Notes

Select this model when a balance of moderate code storage and rich peripheral set is required in a small footprint. The 25 MHz speed suits general-purpose control tasks. Consider alternative variants if higher ADC resolution or USB connectivity is needed, as this specific part lacks those features. Evaluate power consumption profiles against system requirements.

Part Context

This component belongs to the C8051T series of mixed-signal microcontrollers. The series is characterized by full system-on-chip integration, combining analog and digital peripherals with the standard 8051 core. This family targets cost-sensitive applications requiring robust performance without external discrete components.

Replacement Considerations

Check for C8051T63x series variants with different memory sizes. Verify pin-to-pin compatibility before substituting. Consult official cross-reference guides for confirmed equivalents.