C8051F021 The C8051F021 is a highly integrated mixed-signal 8-bit MCU featuring a 25MHz 8051 core, 64KB Flash, and 4.25KB RAM. It includes a 12-bit ADC, 12-bit DAC, and multiple communication interfaces.
Mfr Part #:

C8051F021

Available from 2 distributors
Mfr Name: Silicon Labs
Silicon Labs
The C8051F021 is a highly integrated mixed-signal 8-bit MCU featuring a 25MHz 8051 core, 64KB Flash, and 4.25KB RAM. It includes a 12-bit ADC, 12-bit DAC, and multiple communication interfaces.
✓ Total Stock: 11,050 pcs

C8051F021 Available from 2 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Non-Authorised Inventory information
7,450 pcs
7450 pcs On Request 1 On Request On Request On Request On Request On Request
Non-Authorised Inventory information
3,600 pcs
3600 pcs On Request 1 On Request On Request On Request On Request On Request

C8051F021 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
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Manufacturer Name
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Core Processor
Core Size
Data Converters
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Number of I
Operating Temperature
Oscillator Type
Peripherals
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Program Memory Type
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C8051F021 Description

Short technical summary and product information.

The C8051F021 is a highly integrated mixed-signal 8-bit microcontroller from Silicon Labs, part of the C8051F02x family. It features a powerful 8051 core operating at up to 25 MHz, delivering 25 MIPS throughput. The device includes 64 KB of Flash program memory and 4.25 KB of RAM. Analog peripherals include a 12-bit SAR ADC with up to 100 ksps sampling rate and 8 external inputs, two 12-bit DACs, and two analog comparators. Digital peripherals include 32 I/O lines, SMBus (I2C), SPI, and two UART serial interfaces, along with a 16-bit timer array with 5 capture/compare modules. The microcontroller operates from 2.7V to 3.6V and over a temperature range of -40°C to 85°C. It is housed in a 64-TQFP (10x10 mm) surface-mount package. On-chip JTAG debug and boundary scan provide full-speed, non-intrusive debugging. The C8051F021 is suitable for applications such as portable medical equipment, weigh scales, test equipment, and fiber optic systems. Note: This part is End of Life (EOL); Silicon Labs recommends the EFM8BB31F64G-QFN32 as a replacement.

C8051F021 Quick Information

Product Type: 8-bit Microcontroller
Canonical Name: C8051F021 Analog-Intensive MCU
Subcategory: 8-bit Microcontroller

C8051F021 Compliance

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

C8051F021 Features

  • 25MHz 8051 core with 25 MIPS throughput.
  • 64KB Flash and 4.25KB RAM memory.
  • Integrated 12-bit ADC and 12-bit DAC.
  • Multiple serial interfaces: SPI, I2C, UART.
  • Surface mount 64-TQFP package.

C8051F021 Applications

  • Ideal for portable medical equipment.
  • Used in weigh scale applications.
  • Suitable for test and measurement systems.
  • Fiber optic system control.
  • Industrial automation and control.

C8051F021 FAQs

7 frequently asked questions generated from this part’s specifications.
What is the operating voltage range of the C8051F021?

2.7V to 3.6V.

What is the package type of the C8051F021?

64-TQFP (10x10 mm).

What is the operating temperature range?

-40°C to 85°C.

Is the C8051F021 RoHS compliant?

RoHS3 Compliant (unverified).

What is the core processor of the C8051F021?

8051 8-bit core.

What is the maximum clock speed?

25 MHz.

What communication interfaces are available?

EBI/EMI, SMBus (I2C), SPI, UART/USART.

C8051F021 Alternate Parts

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