C8051T327-GMR

Overview

The C8051T327-GMR is an 8-bit microcontroller from the Silicon Labs C8051T622/3 and C8051T326/7 family, featuring a high-speed CIP-51 core with up to 48 MIPS throughput. It integrates a USB 2.0 full-speed function controller with an on-chip transceiver and clock recovery, eliminating external components. The device includes 16 KB of byte-programmable EPROM code memory and 1280 bytes of internal data RAM. Key peripherals include two enhanced UARTs, SMBus, SPI, four 16-bit timers, and a Programmable Counter Array. It operates within a supply voltage range of 1.8 V to 5.25 V and supports temperatures from -40°C to +85°C in a 28-QFN package.

Feature Summary

• Integrates a USB 2.0 compliant full-speed function controller with an integrated transceiver and on-chip clock recovery for simplified connectivity.
• Features a high-speed pipelined CIP-51 µC core capable of executing 70% of instructions in one or two system clocks.
• Includes 16 KB of byte-programmable EPROM that can be programmed directly from firmware running on the device.
• Provides comprehensive digital peripherals including dual enhanced UARTs, hardware-enhanced SPI, SMBus, and a Programmable Counter Array.

Applications

• Embedded USB connectivity implementations requiring industry-standard USB 2.0 compliance
• Code development platforms utilizing on-chip debug circuitry for non-intrusive in-system debugging
• Applications requiring on-chip programmable EPROM for field-updatable firmware

Procurement Notes

Verify the specific part number against the official datasheet revision history to ensure compatibility with current manufacturing standards. Confirm that the ordering suffix matches the required package type and temperature range. Cross-reference the component details with the manufacturer's latest product change notifications to account for any recent assembly or labeling updates.

Selection Notes

Select this component when a design requires integrated USB functionality without external transceivers or oscillators. The inclusion of byte-programmable EPROM allows for flexible in-application programming capabilities. Ensure the system voltage requirements align with the 1.8 V to 5.25 V operating range and verify that the available I/O ports meet the interface needs for UART, SPI, and SMBus connections.

Part Context

This microcontroller belongs to the C8051T622/3 and C8051T326/7 family, which are designed as single-chip solutions for embedded USB applications. The series combines a high-performance 8051-compatible core with extensive analog and digital peripherals. It is intended to reduce bill-of-materials by integrating functions typically handled by discrete components, such as voltage regulation and clock generation.

Replacement Considerations

Public confirmed substitute part numbers: C8051T326-GM, C8051T622-GM, C8051T623-GM.

FAQ

Does the C8051T327-GMR require external components for USB operation?

No, the device features an integrated USB transceiver and on-chip clock recovery, eliminating the need for external resistors, crystals, or voltage regulators for USB functionality.

Can the program memory be updated after manufacturing?

Yes, the device contains 16 KB of byte-programmable EPROM that can be programmed from firmware running on the device itself.

What debug capabilities are included on-chip?

The device includes on-chip debug circuitry that facilitates full-speed, non-intrusive in-system debug, providing breakpoints, single stepping, and memory/register inspection.