C8051T621-GMR

Overview

The C8051T621-GMR is an 8-bit microcontroller from the Silicon Labs C8051T6xx family, featuring a high-speed pipelined CIP-51 core operating at up to 48 MHz. It integrates 64 kB of byte-programmable EPROM and up to 3328 bytes of internal data RAM. The device includes a Full Speed USB 2.0 function controller with integrated transceiver and clock recovery, supporting eight flexible endpoints and 1 kB of buffer memory. Analog peripherals consist of a 10-bit ADC with up to 500 ksps sampling rate and two comparators. Digital interfaces include hardware-enhanced SPI, SMBus, and dual UARTs.

Feature Summary

• Integrated Full Speed USB 2.0 function controller with built-in transceiver and clock recovery for simplified system design
• High-performance CIP-51 core delivering up to 48 MIPS throughput with pipelined instruction architecture
• On-chip debug circuitry enabling non-intrusive in-system debugging via breakpoints and single stepping
• Flexible clocking options with two internal oscillators allowing on-the-fly switching for power management

Applications

• USB-enabled embedded control systems
• Data acquisition devices requiring analog-to-digital conversion
• Industrial communication nodes using serial protocols
• Battery-powered applications utilizing low-power clock modes

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package type matches design requirements, as QFN and LQFP variants exist within the family. Check revision status as this series may be marked Not Recommended for New Designs. Ensure ESD handling procedures are followed during assembly due to surface mount packaging sensitivity.

Selection Notes

Select this model when USB connectivity and moderate code storage are required alongside analog sensing capabilities. Compare against C8051T620/6/7 derivatives if specific pin counts or peripheral configurations differ. Evaluate power consumption profiles across active and idle modes relative to application duty cycles. Consider alternative families if newer design support is mandatory for long-term production.

Part Context

This component belongs to the C8051T6xx series of 8-bit microcontrollers designed for USB applications. It shares architectural similarities with the C8051T3xx series but offers distinct memory and peripheral configurations tailored for full-speed USB operations. The family utilizes the CIP-51 core to balance processing speed with power efficiency in compact packages.

Replacement Considerations

C8051T620-GM

FAQ

Does the C8051T621-GMR require external components for USB operation?

No, the device features an integrated USB transceiver and clock recovery circuit, eliminating the need for external resistors or oscillators for full-speed or low-speed USB connections.

What is the maximum sampling rate of the onboard ADC?

The 10-bit ADC supports a maximum sampling rate of up to 500 ksps.