C8051T633-GMR

Overview

The C8051T633-GMR is an 8-bit microcontroller from Silicon Labs, part of the C8051T series. It features an 8051 core with a maximum clock frequency of 25 MHz. The device includes 4 kB of One-Time Programmable (OTP) EPROM and 768 bytes of RAM. It operates within a supply voltage range of 1.8 V to 3.6 V and supports an operating temperature range of -40°C to +85°C. The component is housed in a QFN-20 package.

Feature Summary

• Integrates an 8051-compatible processor core for standard instruction set execution.
• Includes on-chip analog-to-digital conversion capabilities for signal processing.
• Supports multiple serial communication interfaces including SPI, UART, and SMBus.

Applications

• General-purpose embedded control systems
• Industrial sensor interfaces
• Battery-powered devices requiring low voltage operation

Procurement Notes

Verify the specific suffix against official documentation, as variations may exist between tape-and-reel and tube packaging formats. Confirm that the OTP memory type aligns with permanent programming requirements, as it cannot be reprogrammed. Check current lifecycle status, as this model may be subject to obsolescence notices or production changes documented by the manufacturer.

Selection Notes

Select this component when a compact QFN-20 footprint is required alongside basic 8-bit processing needs. Ensure the design accommodates the single ADC channel and limited I/O count compared to higher-end variants. Consider the OTP constraint if future firmware updates are anticipated, favoring Flash-based alternatives in such cases.

Part Context

This MCU belongs to the C8051T family, which utilizes pipelined architecture for improved performance over traditional 8051 designs. The series is designed for cost-sensitive applications requiring integrated peripherals. The GMR suffix typically denotes a reel-packaged version of the standard QFN component.

Replacement Considerations

Consult official substitution guides for equivalent parts within the C8051T series or compatible 8051 derivatives. Verify pin compatibility and memory size before replacing with other models like the C8051T63x variants.