C8051F122R

Overview

The C8051F122R is an 8-bit mixed-signal microcontroller from Silicon Labs, featuring a high-speed 8051 core with up to 100 MIPS throughput. It integrates 128 kB of in-system programmable Flash memory and 8448 bytes of internal data RAM. The device includes an 8-bit SAR ADC with up to 500 ksps throughput and two 12-bit DACs. Digital peripherals consist of hardware SMBus, SPI, and dual UART interfaces. Operating voltage ranges from 3.0 V to 3.6 V at maximum speed, housed in a 100-pin TQFP package.

Feature Summary

• High-performance pipelined 8051 core executing most instructions in one or two system clocks
• Integrated on-chip JTAG debug circuitry for non-intrusive in-circuit debugging
• Programmable digital I/O crossbar decoder allowing flexible pin assignment
• Mixed-signal capabilities including 8-bit ADC, 12-bit DACs, and analog comparators

Applications

• Industrial control systems requiring mixed-signal processing
• Data acquisition systems utilizing onboard ADC and DAC resources
• Embedded applications needing robust serial communication via UART and SPI
• Sensor interface circuits leveraging integrated temperature sensors and comparators

Procurement Notes

Verify the specific suffix 'R' indicates tape and reel packaging configuration when sourcing components. Confirm RoHS compliance status as availability may vary by manufacturing batch. Ensure the procurement channel provides valid traceability documentation for this discontinued series component. Cross-reference the manufacturer part number against current distributor catalogs to confirm authenticity and handling specifications.

Selection Notes

Select this model when a high-speed 8051 architecture is required alongside significant onboard analog conversion capabilities. The inclusion of dual 12-bit DACs distinguishes it from variants lacking these outputs. Consider the 100-pin TQFP form factor if extensive GPIO flexibility via the crossbar is necessary. Evaluate power supply constraints, as the 100 MHz operation requires a minimum 3.0 V input voltage.

Part Context

This component belongs to the C8051F12x family of fully integrated mixed-signal System-on-Chip microcontrollers. It shares architectural similarities with the C8051F13x series but differs in its specific analog peripheral configuration, notably the presence of the 8-bit ADC and 12-bit DACs instead of the 10/12-bit ADC found in other members. The family emphasizes high throughput and comprehensive on-chip debugging integration.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.