C8051F931-F-GM

Overview

The Silicon Labs C8051F931-F-GM is an 8-bit microcontroller based on the 8051 architecture, housed in a 32-pin QFN (5 x 5 mm) package. It features a high-speed pipelined core delivering up to 25 MIPS at a 25 MHz clock frequency. The device includes 64 kB of in-system programmable Flash memory and 4352 bytes of internal data RAM. Key analog peripherals consist of a 10-bit SAR ADC with up to 23 external inputs and a throughput of 300 ksps, alongside two comparators. Power management is supported by a built-in DC-DC converter for one-cell operation down to 0.9 V.

Feature Summary

• Integrated hardware SmaRTClock oscillator provides real-time clock functionality while consuming less than 0.5 µA supply current.
• Built-in DC-DC converter enables efficient single-cell battery operation from 0.9 V to 1.8 V.
• On-chip debug circuitry facilitates full-speed, non-intrusive in-system debugging without requiring external emulators.
• High-speed 8051 core utilizes a pipelined instruction architecture to execute the majority of instructions in one or two system clocks.

Applications

• Single-cell or dual-cell battery-powered embedded systems
• Low-power portable instrumentation
• Battery-operated consumer electronics
• Real-time clock applications requiring minimal standby power

Procurement Notes

Verify that the specific suffix '-F-GM' corresponds to the required tape-and-reel packaging configuration rather than tube packaging. Confirm the operating temperature range matches the industrial specification of -40°C to +85°C. Ensure the voltage supply requirements align with the 0.9 V to 3.6 V operational limits defined in the datasheet electrical characteristics.

Selection Notes

Select this component when a complete mixed-signal solution is required within a compact footprint. The inclusion of a 10-bit ADC with programmable gain amplifier and multiple serial interfaces reduces external component count. The availability of both low-power oscillators and high-speed processing capabilities supports flexible power management strategies across varying operational states.

Part Context

This part belongs to the C8051F93x family of fully integrated mixed-signal microcontrollers. It shares architectural similarities with the C8051F92x series but offers double the Flash memory capacity. The device integrates extensive analog peripherals and digital communication interfaces onto a single chip, targeting applications where board space and power efficiency are critical constraints.

Replacement Considerations

C8051F930-G-GMR

FAQ

What is the maximum throughput rate of the onboard ADC?

The 10-bit SAR ADC supports a programmable throughput of up to 300 ksps.

How does the device support single-cell battery operation?

A built-in DC-DC converter allows the MCU to operate efficiently in one-cell mode with supply voltages ranging from 0.9 V to 1.8 V.