C8051F342-GM

Overview

The C8051F342-GM is a fully integrated mixed-signal System-on-Chip MCU from the C8051F34x family, designed for USB applications. It features a high-speed pipelined 8051-compatible core operating at up to 48 MIPS with 25 MHz clock frequency. The device includes 64 kB of in-system programmable Flash memory and 4352 Bytes of RAM. Key peripherals include a full-speed USB 2.0 function controller with an integrated transceiver and clock recovery, a 10-bit ADC supporting up to 200 ksps, two comparators, and multiple digital interfaces such as UARTs, SPI, and SMBus. It operates on a voltage supply of 2.7 V to 5.25 V and is available in a 32-pin LQFP package.

Feature Summary

• Integrated full-speed USB 2.0 function controller with built-in transceiver and clock recovery, eliminating the need for external crystals or resistors.
• High-performance 8051 microcontroller core with pipelined architecture delivering up to 48 MIPS throughput.
• On-chip debug circuitry enabling non-intrusive in-system debugging without requiring external emulation hardware.
• Mixed-signal capabilities including a 10-bit analog-to-digital converter, internal voltage reference, and temperature sensor.

Applications

• PC peripherals
• Point-of-sale terminals
• Medical diagnostic equipment
• Embedded modems

Procurement Notes

Verify the specific suffix 'GM' corresponds to the 32-pin QFN package variant if required, although datasheet lists LQFP-32 for F342. Confirm RoHS compliance status and check for 'Not Recommended for New Designs' warnings in current Silicon Labs documentation before finalizing procurement plans.

Selection Notes

Select this component when a single-chip USB solution with significant Flash memory and mixed-signal processing is needed. Ensure the 32-pin package fits the board layout constraints. Verify that the 48 MIPS performance meets application timing requirements and that the 2.7V to 5.25V supply range aligns with system power design.

Part Context

The C8051F342 belongs to the C8051F34x series of Full Speed Flash MCUs by Silicon Labs. This family provides a complete embedded USB connectivity solution by integrating the USB controller, CPU, memory, and analog peripherals onto a single die. It is part of the broader C8051F product line known for high integration and direct code compatibility with standard 8051 architectures.

Replacement Considerations

Check for newer Silicon Labs USB MCU families such as the C8051F39x or EFM8 series for modern designs, as the C8051F34x is marked 'Not Recommended for New Designs'. Ensure any substitute maintains USB 2.0 full-speed compatibility and similar pinout or software interface if migration is necessary.

FAQ

Does the C8051F342 require an external crystal for USB operation?

No, the device features an integrated clock recovery mechanism that allows it to operate in full-speed or low-speed mode without an external crystal.

What is the maximum sampling rate of the ADC on the C8051F342?

The integrated 10-bit ADC supports a maximum sampling rate of up to 200 ksps.