C8051F34B-GM

Overview

The C8051F34B-GM is a mixed-signal System-on-Chip microcontroller from Silicon Labs, belonging to the C8051F34x family. It features a high-speed 8051 core operating at up to 48 MIPS with pipelined architecture. The device integrates a full-speed USB 2.0 function controller with an integrated transceiver and clock recovery, eliminating the need for external crystals or resistors. Memory resources include 64 kB of Flash memory and 4352 Bytes of RAM. Analog peripherals consist of a 10-bit ADC supporting up to 200 ksps, two comparators, and an internal voltage reference. Digital interfaces include enhanced SPI, SMBus, and dual UARTs. The component operates within a supply voltage range of 2.7 V to 5.25 V and supports industrial temperature ranges from -40 °C to +85 °C.

Feature Summary

• Integrated full-speed USB 2.0 controller with on-chip clock recovery and transceiver
• High-performance 8051 CPU executing instructions in one or two system clocks
• On-chip debug circuitry enabling non-intrusive in-system debugging without external emulators
• Flexible digital crossbar allowing configurable peripheral pin assignments

Applications

• Medical diagnostic equipment
• Point-of-sale (POS) terminals
• Embedded modems
• Voice over Internet Protocol (VoIP) telephones

Procurement Notes

Verify that the specific ordering suffix corresponds to the required package type, as the C8051F34x family utilizes multiple form factors including LQFP and QFN. Confirm the exact memory configuration matches project requirements, as variations exist within the series. Note that this product line is designated as Not Recommended for New Designs; ensure long-term availability aligns with lifecycle planning before finalizing procurement decisions.

Selection Notes

Select this component when a single-chip solution for embedded USB connectivity is required alongside significant analog processing capabilities. The integration of a 10-bit ADC and comparators reduces external component count compared to discrete MCU solutions. Consider the available GPIO flexibility and the presence of dual UARTs if serial communication redundancy is necessary. Evaluate the power supply constraints, as the device supports both low-voltage operation and extended ranges via its internal regulator.

Part Context

This device is part of the C8051F34x Full Speed USB Flash MCU Family produced by Silicon Laboratories. The family shares a common architectural foundation but varies in memory size, package options, and specific peripheral configurations. The C8051F34B variant specifically offers 64 kB of Flash and 4352 Bytes of RAM, distinguishing it from lower-capacity models like the C8051F34A which contains 32 kB of Flash.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source documentation.