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C8051F121-GQR 8-bit 8051 microcontroller from Silicon Labs with 128KB Flash program memory, 8.25KB RAM, 32 I/O lines, and up to 100 MHz operation in a 64-TQFP package.
Mfr Part #:

C8051F121-GQR

Available from 3 distributors
Mfr Name: Silicon Labs
Silicon Labs
8-bit 8051 microcontroller from Silicon Labs with 128KB Flash program memory, 8.25KB RAM, 32 I/O lines, and up to 100 MHz operation in a 64-TQFP package.
✓ Total Stock: 2,447 pcs

C8051F121-GQR Available from 3 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Xingangxin ✓
Non-Authorised Inventory information
1,259 pcs
On Request
1259 pcs On Request 1 On Request On Request On Request On Request On Request
Smaxon Electronics ✓
Non-Authorised Inventory information
1,000 pcs
On Request
1000 pcs On Request 1 On Request On Request 21+ On Request On Request
Risen Electronics ✓
Non-Authorised Inventory information
188 pcs
On Request
188 pcs On Request 1 On Request On Request On Request On Request 2026-02-23 21:33:16
DistyParts aggregates offers from multiple distributors. Final prices, lead times and terms are subject to the distributors' discretion and may change without prior notice. DistyParts is not liable for any discrepancies.

C8051F121-GQR Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Connectivity
Core Processor
Core Size
Data Converters
Mounting Type
Number of I
Operating Temperature
Oscillator Type
Peripherals
Program Memory Size
Program Memory Type
RAM Size
Speed
Supplier Device Package
Voltage
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C8051F121-GQR Description

Short technical summary and product information.

The C8051F121-GQR is an 8-bit microcontroller based on the high-speed pipelined 8051 core from Silicon Laboratories. It operates at up to 100 MHz and delivers up to 100 MIPS throughput. The device features 128KB of in-system programmable Flash memory and 8.25KB of internal data RAM.

 

On-chip analog peripherals include a 10 or 12-bit SAR ADC with programmable throughput up to 100 ksps, up to 8 external input channels, and two 12-bit DACs. Additional peripherals include a temperature sensor, brown-out detect/reset, power-on reset, PWM, and a watchdog timer.

 

Connectivity options include EBI/EMI, SMBus (I2C compatible), SPI, and two UART/USART serial interfaces. The device is offered in a 64-pin TQFP (10x10 mm) package with surface mount mounting. It is specified for operation over the industrial temperature range of -40°C to +85°C.

C8051F121-GQR Quick Information

Product Type: Microcontroller
Series: C8051F12x
Canonical Name: C8051F121-GQR
Subcategory: 8051 MCU

C8051F121-GQR Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

C8051F121-GQR Features

  • High-speed pipelined 8051 core up to 100 MIPS.
  • 128KB in-system programmable Flash memory.
  • 8.25KB internal data RAM (8K + 256 bytes).
  • 10/12-bit SAR ADC with up to 100 ksps throughput.
  • Dual 12-bit DACs for analog waveform generation.

C8051F121-GQR Applications

  • Industrial control and automation systems.
  • Mixed-signal data acquisition applications.
  • Embedded control requiring high-speed processing.
  • Sensor interface and signal conditioning.
  • Motor control with PWM and analog feedback.

C8051F121-GQR FAQs

5 frequently asked questions generated from this part’s specifications.
What is the operating voltage range of the C8051F121-GQR?

3V to 3.6V

What is the operating temperature range?

-40°C to +85°C

What package does this microcontroller come in?

64-TQFP (10x10 mm)

How much Flash memory does the C8051F121-GQR have?

128KB (128K x 8)

What is the maximum speed of the core?

100 MHz

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