C8051F120-GQR

Overview

The C8051F120-GQR is an 8-bit microcontroller from the Silicon Labs C8051F12x series, featuring a pipelined CIP-51 core operating at up to 100 MIPS. It integrates 128 kB of in-system programmable Flash memory and 8448 bytes of internal data RAM. The device includes a 12-bit SAR ADC with 8 channels and a separate 8-bit SAR ADC, alongside two 12-bit DACs. Digital peripherals consist of hardware SMBus, SPI, and dual UART interfaces, supported by five 16-bit timers and a 2-cycle 16x16 MAC engine. It operates within a voltage range of 3.0 V to 3.6 V at maximum speed and is housed in a 100-TQFP package.

Feature Summary

• High-speed 8051-compatible core with pipelined architecture and integrated multiply-and-accumulate engine
• Mixed-signal integration including 12-bit and 8-bit analog-to-digital converters with programmable gain amplifiers
• On-chip JTAG debug circuitry enabling full-speed, non-intrusive in-circuit debugging without emulation chips
• Concurrent digital communication interfaces including hardware SMBus, SPI, and dual UART ports

Applications

• Portable medical equipment
• Weigh scales
• Test equipment
• Fiber optic systems

Procurement Notes

Verify component status as this part is designated Not Recommended for New Designs (NRND) or End of Life (EOL). Confirm availability through authorized distributors and check for Last Time Buy notifications. Ensure replacement strategies are evaluated prior to procurement due to potential discontinuation risks.

Selection Notes

Select this component for applications requiring high analog integration and fast processing in an 8-bit architecture. Consider the 100-pin TQFP package constraints and verify power supply requirements align with the 3.0 V to 3.6 V operational range. Evaluate if the discontinued status impacts long-term project viability compared to newer Silicon Labs alternatives.

Part Context

This MCU belongs to the C8051F12x family of highly integrated mixed-signal system-on-chip solutions. It is designed for standalone operation with extensive on-board peripherals, reducing external component count. The series emphasizes high throughput and precise analog control capabilities suitable for demanding embedded environments.

Replacement Considerations

Silicon Labs recommends the EFM8BB31F64G-QFN32 as a replacement for the C8051F120. Verify pinout compatibility and peripheral mapping differences when migrating designs to the EFM8 Busy Bee series.

FAQ

Does the C8051F120 include both 12-bit and 8-bit ADCs?

Yes, the C8051F120 integrates a 12-bit SAR ADC with up to 8 external inputs and a separate 8-bit SAR ADC, also supporting 8 external inputs.

What is the maximum clock throughput of the CIP-51 core?

The CIP-51 core achieves a maximum throughput of 100 MIPS using the on-chip PLL technology.