C8051F394-A-GMR

Overview

The C8051F394-A-GMR is a mixed-signal microcontroller from the C8051F39x family, featuring a pipelined 8051 core with up to 50 MIPS throughput at 50 MHz. It integrates 16 kB of Flash memory, 1 kB of internal data RAM (256 bytes + 768 bytes XRAM), and 21 GPIOs. The device includes a 10-bit ADC with programmable throughput up to 500 ksps, 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 a temperature range of –40 °C to +105 °C in a 24-pin QFN package.

Feature Summary

• High-performance CIP-51 core executes 70% of instructions in one or two system clocks for efficient processing.
• Integrated precision analog peripherals include a 10-bit ADC, dual 10-bit current mode DACs, and a calibrated temperature sensor.
• On-chip debug circuitry enables full-speed, non-intrusive in-system debugging without external emulators.
• Flexible clocking system allows seamless switching between internal oscillators and external sources for power management.

Applications

• Battery-powered portable instrumentation
• Industrial process control systems
• Consumer electronics requiring high integration
• Medical devices needing precise analog signal acquisition

Procurement Notes

Verify component authenticity through authorized Silicon Labs distributors. Confirm the specific suffix matches the required package and temperature grade. Check for end-of-life status as this series may be marked Not Recommended for New Designs. Ensure ESD handling protocols are followed during storage and assembly.

Selection Notes

Select this model when 16 kB Flash and 1 kB RAM are sufficient for application logic. Choose the C8051F394 variant specifically for its 24-pin QFN package and 21 GPIO count. Verify that the 10-bit ADC resolution meets signal accuracy requirements compared to higher-resolution alternatives. Consider the extended industrial temperature range if operating in harsh environments.

Part Context

This part belongs to the C8051F39x family, which serves as a next-generation upgrade to the C8051F33x series. It maintains footprint and code compatibility while offering increased speed, more RAM, and additional features. The family is designed as a standalone system-on-a-chip solution with integrated power management and clock oscillators.

Replacement Considerations

The C8051F394-A-GM is the tape-and-reel equivalent of the GMR suffix. For legacy migration, the C8051F33x series offers pin-compatible options but with lower performance specifications. Verify software compatibility when transitioning between these families due to peripheral enhancements.