C8051F391-A-GM

Overview

The C8051F391-A-GM is an 8-bit mixed-signal microcontroller from the Silicon Labs C8051F39x family, featuring a pipelined 8051 core with up to 50 MIPS throughput at a 50 MHz clock. It includes 16 kB of in-system programmable Flash memory and 1 kB of internal data RAM (256 bytes + 768 XRAM). The device integrates analog peripherals including a 10-bit ADC with up to 500 ksps throughput, two 10-bit current output DACs, and an analog comparator. It operates on a supply voltage of 1.8 V to 3.6 V and supports digital interfaces such as UART, SMBus, and SPI.

Feature Summary

• Pipelined 8051 architecture delivering high-speed processing with up to 50 MIPS throughput.
• Integrated analog subsystem comprising a 10-bit ADC, dual 10-bit current mode DACs, and a precision temperature sensor.
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators.
• Low-power operation capabilities including Stop mode current consumption of 200 nA.

Applications

• Battery-powered systems requiring low power consumption and extended temperature range.
• Industrial control applications utilizing multiple serial communication interfaces.
• Data acquisition systems leveraging integrated analog-to-digital conversion capabilities.
• Embedded motor control solutions using programmable counter array PWM functionality.

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm that the specific ordering suffix matches the required package type and temperature rating. Check for 'Not Recommended for New Designs' status if planning long-term production. Ensure compliance with RoHS standards and verify lead-free specifications before procurement.

Selection Notes

Select this MCU when a compact footprint with mixed-signal capabilities is required. Compare against the C8051F33x series for code compatibility while noting the enhanced performance and extended temperature range of the F39x family. Consider the availability of 16 kB Flash and 1 kB RAM for application memory requirements. Evaluate the need for specific analog peripherals like the precision temperature sensor or dual DACs.

Part Context

The C8051F391-A-GM belongs to the C8051F39x family, which serves as a next-generation upgrade to the widely used C8051F33x devices. It maintains hardware and software compatibility with the F33x series while offering improved speed, additional features, and an extended industrial temperature range. This positioning makes it suitable for migrating existing designs to higher performance levels without significant architectural changes.

Replacement Considerations

The C8051F331 is a compatible alternative within the same ecosystem, offering similar functionality but with lower performance specifications and a commercial temperature range. Designers should verify pinout compatibility and ensure that the reduced clock speed and memory capacity of the replacement meet application requirements.