C8051F342-GQR

Overview

The C8051F342-GQR is a mixed-signal System-on-Chip microcontroller from Silicon Labs, featuring a high-speed 8051 core operating at 48 MIPS. It integrates a full-speed USB 2.0 function controller with an on-chip transceiver and clock recovery, eliminating the need for external components. The device includes 64 kB of in-system programmable Flash memory and 4352 bytes of RAM. Digital peripherals consist of four 16-bit timers, a Programmable Counter Array (PCA), SPI, SMBus, and dual enhanced UARTs. Analog features include two comparators, a temperature sensor, and brown-out detection. It operates within a voltage range of 2.7 V to 5.25 V using an internal regulator and supports industrial temperatures from -40°C to +85°C.

Feature Summary

• Integrated full-speed USB 2.0 function controller with built-in transceiver and clock recovery for simplified connectivity.
• High-performance pipelined 8051 core delivering up to 48 MIPS execution speed.
• On-chip debug circuitry enabling non-intrusive in-system debugging without external emulators.
• Flexible digital I/O with a priority crossbar decoder allowing configurable peripheral pin mapping.

Applications

• USB-enabled PC peripherals
• Point-of-sale (POS) terminals
• Embedded modems
• Voice over Internet Protocol (VoIP) telephones

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix matches the required package type. Check for current lifecycle status as this family may be marked Not Recommended for New Designs. Ensure environmental compliance documentation aligns with project requirements.

Selection Notes

Select this model when a USB interface is required alongside standard 8051 functionality. The 48-pin TQFP variant offers more I/O options compared to the 32-pin LQFP versions. Consider the integrated voltage regulator if operating near the upper supply limit. Evaluate memory requirements against the available 64 kB Flash and 4352 bytes RAM capacity.

Part Context

This component belongs to the C8051F34x series of Full Speed USB Flash MCUs. It shares architectural similarities with other members like the C8051F340 and C8051F341 but differs in package configuration and specific peripheral availability. The series targets applications needing robust USB connectivity combined with general-purpose microcontroller capabilities.

Replacement Considerations

Direct substitutes within the same family include C8051F340-GQ, C8051F341-GQ, and C8051F344-GQ. Verify pin compatibility and software register mappings before substitution. Alternative packages such as QFN-32 are available for variants like C8051F342-GQ.

FAQ

Does the C8051F342-GQR require an external crystal for USB operation?

No, the device features an integrated clock recovery mechanism that allows full-speed USB operation without an external crystal.

What is the maximum operating frequency of the CPU core?

The C8051F342-GQR utilizes a high-speed 8051 core capable of executing instructions at up to 48 MIPS.