C8051F389-B-GQR

Overview

The C8051F389-B-GQR is an 8-bit microcontroller from the Silicon Labs C8051F38x series, featuring a high-speed 8051 core operating at up to 48 MIPS. It integrates 64 kB of in-system programmable Flash memory and 4352 bytes of RAM. The device includes a 10-bit ADC with up to 500 ksps conversion rate, two comparators, and a built-in temperature sensor. Communication interfaces consist of hardware-enhanced SPI, two I2C/SMBus ports, and two enhanced UARTs. It operates on a voltage supply of 2.7 V to 5.25 V using on-chip regulators and supports a temperature range of –40 °C to +85 °C.

Feature Summary

• High-speed pipelined 8051 core executing 70% of instructions in 1 or 2 system clocks
• Integrated 10-bit ADC with analog multiplexer supporting single-ended and differential modes
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators
• Flexible port I/O configuration with priority crossbar decoder and 5 V tolerant pins

Applications

• Industrial control systems requiring mixed-signal processing
• Data acquisition applications utilizing the high-speed ADC and temperature sensors
• Embedded devices needing robust serial communication via multiple UART and SMBus interfaces

Procurement Notes

Verify the specific suffix 'GQR' against the manufacturer's current documentation to confirm package type and tape-and-reel specifications. Confirm that the component status aligns with project lifecycle requirements, as this family may be marked for discontinuation. Ensure compatibility with existing PCB footprints for the 32-pin LQFP or QFN packages associated with this variant.

Selection Notes

Select this component when a fully integrated mixed-signal MCU with USB-independent operation is required. It is suitable for designs prioritizing high instruction throughput and extensive analog peripherals within a compact footprint. Consider the available pin count and memory size relative to application complexity. Evaluate the need for on-chip voltage regulators if power supply noise is a concern.

Part Context

This part belongs to the C8051F388/9/A/B Flash MCU family, which shares architectural similarities with the C8051F34x series but offers enhanced performance and peripheral sets. The C8051F389 variant specifically provides 64 kB of Flash and 4352 bytes of RAM, distinguishing it from lower-capacity siblings like the C8051F38A. It utilizes the CIP-51 core architecture for improved execution speed compared to standard 8051 implementations.

Replacement Considerations

Public confirmed substitute part numbers: C8051F389-B-GQ (same functionality, different packaging). Verify pinout compatibility and software register mapping before substitution.