C8051T326-GMR

Overview

The C8051T326-GMR is an 8-bit microcontroller from the Silicon Labs C8051T32x/7 family, featuring a high-speed pipelined 8051 core with up to 48 MIPS throughput at 48 MHz. It integrates 16 kB of byte-programmable EPROM and 1280 bytes of internal data RAM. The device includes a full-speed USB 2.0 function controller with an integrated transceiver and clock recovery, supporting six flexible endpoints and 256-byte buffer memory. Digital peripherals consist of two enhanced UARTs, hardware-enhanced SPI, SMBus, four 16-bit timers, and a 16-bit PCA. It operates on a supply voltage of 1.8 V to 5.25 V and is available in a 28-pin QFN package.

Feature Summary

• Integrates a high-speed 8051 CPU core capable of executing 70% of instructions in one or two system clocks for efficient processing.
• Features a full-speed USB 2.0 compliant function controller with an integrated transceiver and on-chip clock recovery, eliminating external components.
• Includes on-chip debug circuitry that facilitates non-intrusive in-system debugging with breakpoints and single-stepping capabilities.
• Provides flexible port I/O configuration via a priority crossbar decoder, allowing digital and analog functions to be assigned to specific pins.

Applications

• Embedded USB connectivity devices requiring host or peripheral communication
• Data acquisition systems utilizing the onboard serial interfaces and timer resources
• Industrial control applications needing robust digital peripheral integration

Procurement Notes

Verify the specific ordering suffix to confirm the tape and reel packaging format associated with the GMR designation. Confirm the exact memory capacity variant within the C8051T32x family, as EPROM sizes may vary across derivatives. Ensure compatibility with the required operating voltage range and temperature specifications for the target environment before finalizing procurement.

Selection Notes

Select this component when a fully integrated USB solution without external transceivers is required. Consider the C8051T326-GMR for designs needing significant EPROM storage for firmware updates or field programming. Evaluate the pin count and peripheral set against application requirements, noting the availability of multiple serial interfaces and timer modules for complex signal generation.

Part Context

This part belongs to the C8051T622/3 and C8051T326/7 family of mixed-signal microcontrollers. These devices are designed to simplify USB implementation by combining the MCU core, USB controller, and necessary analog peripherals on a single chip. The family supports various package options including QFN-24 and QFN-28, catering to space-constrained embedded applications.

Replacement Considerations

Check the C8051T327 derivative for potential functional equivalence within the same datasheet family. Verify pinout compatibility and memory size differences when substituting with other members of the C8051T series. Consult the manufacturer's documentation for any obsolescence notices or recommended upgrades for legacy designs.