​C8051F33x Small Form Factor Microcontrollers​​​

The C8051F33x small MCU devices are available in 20-pin and 24-pin packages and include up to 16 kB flash with 10-bit ADC and 10-bit DAC. A pin-for-pin compatible one-time Programmable (OTP) EEPROM version is also available (C8051T63x).
With on-chip Power-On Reset, VDD monitor, Watchdog Timer and clock oscillator, the C8051F33x devices are truly stand-alone System-on-a-Chip solutions. The Flash memory of these small MCUs can be reprogrammed even in-circuit, providing non-volatile data storage, and also allows field upgrades of the 8051 firmware. User software has complete control of all peripherals and may individually shut down any or all peripherals for power savings.


  • 25 MIPS 8051 CPU
  • 2 to 8 kB Flash
  • 768 B RAM
  • 10-bit, 200 ksps, 16-ch. ADC (F330/32/34 only)
  • 10-bit DAC (F330 only)
  • 17 digital I/O, 5 V tolerant
  • 2.7 to 3.6 V supply
  • –40 to +85 °C operating temperature
  • On-chip debug
  • 24-pin QFN or 20-pin QFN



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Data Sheet (3)

Data Short (10)

C8051F330 Data Short
1.10.20111/13/201186 kB
C8051F331 Data Short
1.10.20111/13/201179 kB
C8051F332 Data Short
4.19.2005435 kB
C8051F333 Data Short
4.19.2005432 kB
C8051F334 Data Short
4.19.2005435 kB
C8051F335 Data Short
4.19.2005432 kB
C8051F336 Data Short
8.13.07419 kB
C8051F337 Data Short
8.13.07404 kB
C8051F338 Data Short
8.13.07417 kB
C8051F339 Data Short
8.13.07399 kB

Errata (1)

C8051F336/7/8/9 Rev A Errata
12110812/16/200844 kB

User Guides (8)

Quick Start Guide (1)

MCU Quick-Start Guide Featuring the USB Debug Adapter
0.51246 kB

Application Notes (29)

AN0822: Simplicity Studio User's Guide
0.12/12/20141412 kB
AN101: Configuring the Port I/O Crossbar Decoder
2.27/19/2013272 kB
AN103: Using the On-Chip Temperature Sensor
1.37/19/2013326 kB
AN104: Integrating Keil 8051 Tools into the IDE
3.06/18/2013525 kB
AN107: Implementing 16-bit PWM Using the PCA
1.1298 kB
AN111: Using the C8051Fxxx in 5 Volt Systems
1.37/20/2013243 kB
AN117: Using the C8051Fxxx On-Chip Interface Utilities DLL
3.37/19/2013268 kB
AN119: Calculating Settling Time for Switched Capacitor ADCs
1.27/19/2013301 kB
AN123: Using the DAC as a Function Generator
1.1272 kB
AN124: Pin Sharing Techniques for the C2 Interface
1.27/19/2013191 kB
AN125: Integrating Raisonance 8051 Tools into the IDE
1.3162 kB
AN126: Integrating Tasking 8051 Tools into the Silicon Labs IDE
2.4207 kB
AN127: FLASH Programming via the C2 Interface
1.21/15/2013179 kB
AN136: Production Programming Options for MCU Devices
1.37/19/2013200 kB
AN140: Integrating HI-TECH 8051 Tools into the IDE
1.3207 kB
AN141: SMBus Communication for Small Form Factor Device Families
1.37/19/2013490 kB
AN148: Magnetic Stripe Reader
1.38/12/20081674 kB
AN191: Motor Control Software Examples
1.17/19/2013574 kB
AN198: Integrating SDCC 8051 Tools into the Silicon Labs IDE
0.2224 kB
AN201: Writing to Flash from Firmware
0.77/19/2013201 kB
AN203: C8051Fxxx Printed Circuit Board Design Notes
0.27/19/2013314 kB
AN236: Integrating IAR 8051 Tools into the Silicon Laboratories IDE
0.3442 kB
AN324: Advanced Encryption Standard
0.1176 kB
AN533: Modular Bootloader Framework for Silicon Labs C8051Fxxx Microcontrollers
0.112/3/2010165 kB
AN568: EEPROM Emulations for Flash Microcontrollers
0.11/5/201158 kB
AN767: SMBus Bootloader
0.14/24/201397 kB
AN778: UART Bootloader
0.16/18/2013224 kB
AN788: Porting Considersations from C8051F30x and C8051F330/1/2/3/4/5 to C8051F85x/86x
0.110/22/2013159 kB
AN798: EEPROM Emulation with Wear-Leveling for 8-Bit Flash MCUs
0.110/21/201361 kB

White Papers (6)

Miscellaneous (1)

C2 Specification
1.1273 kB

PCN (5)

Development Tools


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Design Tools

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Software (40)

Interfacing an External SRAM to the C8051Fxxx
2 kB
16-bit PWM using an on-chip timer
1 kB
8 Bits Tools Installer
4.907/23/2014680562 kB
Advanced encryption standard
20 kB
AN767SW: SMBus Bootloader Software
4/25/2013252 kB
AN778 Software
6/21/2013448 kB
Configuration Wizard 2 Installer
4.4012/11/201316076 kB
Configuring the internal and external oscillators
7 kB
Configuring the Port I/O Crossbar Decoder
0 kB
EEPROM emulation for flash microcontrollers
16 kB
F850_BLDC_RD software kB
Flash programming via the C2 interface
97 kB
FLASHUtil Installer
4.407/23/20147754 kB
Hex to Svf conversion utility software
V 1.317/17/20123623 kB
IDE Installer
4.907/23/201425866 kB
Implementing 16-bit PWM using the PCA
6 kB
Implementing a real-time clock
2 kB
Improving ADC resolution by oversampling and averaging
3 kB
Integrating Hi-Tech 8051 tools into the Silicon Labs IDE
1 kB
Integrating IAR 8051 tools into the Silicon Labs IDE
12 kB
Integrating SDCC 8051 tools into the Silicon Labs IDE
7 kB
Integrating Tasking 8051 tools into the Silicon Labs IDE
1 kB
IR Performance Analysis Tool
7641 kB
Low Pin-Count LCD Interface Software
4 kB
Magnetic Stripe Reader
20 kB
Modular bootloader framework for Silicon Labs MCUs
372 kB
Motor control software examples
19 kB
Production Programmer
3.207/23/20142594 kB
Simplicity Studio v2
v210/15/2014185708 kB
Simplicity Studio v2, Linux Installer
v210/15/2014197559 kB
Simplicity Studio v2, Mac Installer
v210/15/2014138770 kB
Simplicity Studio v2, Offline Installer
v210/15/20141912663 kB
SMBus communication for small form factor devices
223 kB
Software UART examples
13 kB
Three-Channel Power Sequencer.
25 kB
ToolStick Development Tools
2.60.18/2/201345699 kB
USB Debug Adapter Reset Utility
1.76/1/201349 kB
Using the on-chip temperature sensor
5 kB
uVision Driver
4.107/23/20144982 kB
Writing to flash from firmware
76 kB

Schematics/Layout (12)

Models (1)

C8051F330-5 IBIS Model
1.040 kB

Training (2)

Product Matrix
Part NumberMCU CoreMHzFlashRAMDig I/O PinsTimers (16-bit)PCA ChannelsInternal Osc.ADC 1ADC 2DACTemp SensorVREFComparatorsDebug InterfaceOtherPackage TypePackage SizeAlternativeDev KitAEC-Q100CommunicationsFootnotes
C8051F330-GM8051258 kB0.751743±2%10-bit, 16-ch., 200 ksps10-bit, 1-ch.YesYes1C2LFOQFN204x4 mmT630C8051F330DK
C8051F330-GP8051258 kB0.751743±2%10-bit, 16-ch., 200 ksps10-bit, 1-ch.YesYes1C2LFODIP204x4 mmC8051F330DK
C8051F3318051258 kB0.751743±2%NoNo1C2LFOQFN204x4 mmT631C8051F330DK
C8051F3328051254 kB0.751743±2%10-bit, 16-ch., 200 kspsYesYes1C2LFOQFN204x4 mmT632C8051F330DK
C8051F3338051254 kB0.751743±2%NoNo1C2LFOQFN204x4 mmT633C8051F330DK
C8051F3348051252 kB0.751743±2%10-bit, 16-ch., 200 kspsYesYes1C2LFOQFN204x4 mmT634C8051F330DK
C8051F3358051252 kB0.751743±2%NoNo1C2LFOQFN204x4 mmT635C8051F330DK
C8051F33680512516 kB0.751743±2%10-bit, 16-ch., 200 ksps10-bit, 1-ch.YesYes1C2LFOQFN204x4 mmC8051F336DK
C8051F33780512516 kB0.751743±2%NoNo1C2LFOQFN204x4 mmC8051F336DK
C8051F33880512516 kB0.752143±2%10-bit, 16-ch., 200 ksps10-bit, 1-ch.YesYes1C2LFOQFN244x4 mmC8051F336DK
C8051F33980512516 kB0.752143±2%NoNo1C2LFOQFN244x4 mmC8051F336DK
    ​The on-chip 2-Wire (C2) development Interface allows non-intrusive (uses no on-chip resources), full speed, in-circuit debugging using the production MCU installed in the final application. This debug logic supports inspection and modification of memory and registers, setting breakpoints, single stepping and run and halt commands. All analog and digital peripherals are fully functional while debugging using C2. The two C2 interface pins can be shared with user functions, allowing in-system debugging without occupying package pins.
    Each device is specified for​​ 2.7 to 3.6 V operation over the industrial temperature range (–40 to +85 °C).


    Product Matrix





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