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C8051F340-GQ

8051 USB 2.0 MCU, 48MIPS, 64KB Flash, 10-bit ADC, 40 I/O, 48-TQFP

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Manufacturer Part：

C8051F340-GQ

Package：

48-TQFP (7 x 7 x 1.0mm)

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Description

Product Overview

The C8051F340-GQ from Silicon Labs is a full-speed USB 2.0 mixed-signal 8051 MCU in a 48-TQFP (7x7mm) package. It features a 48 MIPS 8051 core, 64KB Flash, 4.25KB RAM, integrated USB transceiver with clock recovery, 10-bit 200ksps ADC with 20 channels, and on-chip debug, providing a single-chip USB solution requiring no external crystal or resistors.

Key Specifications

MCU Core High-speed 8051 (pipelined)
Max Clock Speed 48MHz (48 MIPS)
Flash Memory 64KB
RAM 4352 bytes (256 + 4KB XRAM)
USB 2.0 Full-speed (12Mbps) / Low-speed
USB Endpoints 8 flexible (control + 7 data)
USB Buffer 1KB dedicated FIFO RAM
ADC 10-bit, 20-channel, 200 ksps
Comparators 2
Serial Interfaces SMBus, SPI, 2x UART
Digital I/O 40 pins (5V tolerant)
Timers 4x 16-bit + PCA (5 modules)
Supply Voltage 2.7V to 5.25V (internal regulator)
Package 48-TQFP (7 x 7mm)
Operating Temperature -40°C to +85°C

Features

  • Full-speed USB 2.0 with integrated transceiver
  • On-chip clock recovery – no external crystal needed for USB
  • 1KB dedicated USB FIFO buffer RAM
  • 8 flexible USB endpoint pipes
  • 10-bit 200 ksps ADC with 20 external inputs
  • Built-in temperature sensor (±3°C)
  • Internal voltage reference
  • 2 analog comparators
  • On-chip debug (breakpoints, single-step, memory inspect)
  • 5V tolerant digital I/O
  • Internal oscillator: 0.25% accuracy with clock recovery
  • USBXpress development kit available

Applications

  • USB peripherals and custom USB devices
  • Data acquisition with USB connectivity
  • USB-based industrial instrumentation
  • Medical device USB interfaces
  • Embedded USB bridge and dongle applications

The C8051F340-GQ from Silicon Labs is a fully integrated mixed-signal System-on-Chip microcontroller featuring an on-board USB 2.0 function controller with integrated transceiver and on-chip clock recovery. No external resistors, crystal, voltage regulator, EEPROM, or other components are required for USB operation. The high-speed pipelined 8051 core achieves up to 48 MIPS throughput with 64KB Flash and 4.25KB RAM. On-chip analog peripherals include a 10-bit 200ksps ADC with 20 external inputs, internal voltage reference, temperature sensor, and two comparators.

The C8051F340 uses a pipelined 8051 core that executes 70% of instructions in 1-2 system clock cycles, achieving up to 48 MIPS at 48MHz. The USB function controller integrates a transceiver, Serial Interface Engine (SIE), and 1KB FIFO buffer RAM, handling USB protocol independently. On-chip clock recovery extracts the USB clock from incoming data, eliminating the need for an external crystal. The Crossbar architecture allows flexible mapping of digital peripherals (UART, SPI, SMBus, PCA, timers) to any of the 40 I/O pins. The on-chip debug circuitry provides non-intrusive in-system debug with breakpoints and single-step capability via the C2 interface.

Pin Name Type Function
1-8 P0.0-P0.7 I/O Port 0: ADC / debug / VREF digital I/O
9-16 P1.0-P1.7 I/O Port 1: EMIF / external memory I/O
17-24 P2.0-P2.7 I/O Port 2: EMIF address bus I/O
25-32 P3.0-P3.7 I/O Port 3: EMIF / ADC input I/O
33-40 P4.0-P4.7 I/O Port 4: EMIF data bus I/O
41 REGIN Power Internal regulator input (5V)
42 VDD Power Digital supply (2.7-3.6V)
43 VBUS Input USB bus voltage detect
44 D- I/O USB data negative
45 D+ I/O USB data positive
46 GND Power Ground
  • USB data acquisition modules with 10-bit ADC
  • Custom USB HID devices for industrial control
  • Medical instrumentation with USB connectivity
  • USB-to-UART/SPI bridge adapters
  • Embedded USB dongles for authentication and licensing
Manufacturer Part Number Package Notes
Silicon Labs C8051F340-GM QFP-48 Tape and reel version
Silicon Labs C8051F341-GQ TQFP-48 32KB Flash variant
Microchip PIC18F45K50-I/PT TQFP-44 USB 2.0 8-bit MCU, 32KB Flash
ST STM32F103C8T6 LQFP-48 ARM Cortex-M3, USB 2.0 FS
NXP LPC11U37FBD48 LQFP-48 Cortex-M0, USB 2.0, 128KB Flash
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Quality Assurance

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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