C8051F120R

Overview

The C8051F120R is a highly integrated mixed-signal 8-bit microcontroller featuring a high-speed 8051 core with up to 100 MIPS throughput. It includes 128 kB of in-system programmable Flash memory and 8448 bytes of internal data RAM. The device integrates an 8-bit SAR ADC with up to 500 ksps throughput, two 12-bit DACs, and two analog comparators. Communication interfaces include hardware SMBus, SPI, and two UART ports. It operates within a voltage range of 3.0 V to 3.6 V at maximum speed and supports JTAG debug.

Feature Summary

• High-performance pipelined 8051 core executing 70% of instructions in one or two system clocks
• Integrated 8-bit SAR ADC with programmable throughput up to 500 ksps and multiple gain settings
• Dual 12-bit digital-to-analog converters capable of synchronized timer-based waveform generation
• On-chip JTAG debug circuitry providing full-speed non-intrusive in-circuit debugging capabilities

Applications

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

Procurement Notes

Verify the specific suffix 'R' against the manufacturer's current documentation to confirm tape-and-reel packaging status. Confirm RoHS compliance requirements for the target application. Check for End-of-Life announcements or Last Time Buy notices as this component family has reached maturity. Ensure the 100-pin TQFP package dimensions match the PCB footprint design constraints.

Selection Notes

Select this model when a complete stand-alone system-on-chip solution is required with high analog integration. The inclusion of dual 12-bit DACs and an 8-bit high-speed ADC distinguishes it from variants lacking these peripherals. Consider the 100-pin TQFP package size if external memory interface access is needed alongside extensive GPIO availability.

Part Context

This component belongs to the C8051F12x series of 8K ISP Flash MCUs from Silicon Labs. It shares architectural similarities with the C8051F13x series but differs in analog peripheral configurations. The device utilizes the CIP-51 microcontroller core and is designed for applications demanding high processing speed combined with precise analog signal conditioning.

Replacement Considerations

Silicon Labs recommends the EFM8BB31F64G-QFN32 as a replacement for this part.