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Product Detailed Parameters
- Description：IC MCU 8BIT 128KB FLASH 100TQFP
- Series：C8051F12x
- Mfr：Silicon Labs
- Package：Tray
- Core Processor：8051
- Core Size：8-Bit
- Speed：50MHz
- Connectivity：EBI/EMI, SMBus (2-Wire/I2C), SPI, UART/USART
- Peripherals：Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
- Number of I/O：64
- Program Memory Size：128KB (128K x 8)
- Program Memory Type：FLASH
- EEPROM Size：-
- RAM Size：8.25K x 8
- Voltage - Supply (Vcc/Vdd)：2.7V ~ 3.6V
- Data Converters：A/D 8x8b, 8x10b; D/A 2x12b
- Oscillator Type：Internal
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Supplier Device Package：100-TQFP (14x14)
- Package / Case：100-TQFP
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Overview
The C8051F126-GQ is an 8-bit mixed-signal microcontroller from the C8051F12x/13x family, featuring a pipelined CIP-51 core with 50 MIPS throughput. It includes 128 kB Flash and 8448 bytes RAM. Key peripherals are a 10-bit 100 ksps ADC, two 12-bit DACs, two comparators, and five 16-bit timers. Interfaces include SMBus, SPI, and dual UARTs. Operating voltage is 2.7–3.6 V at 50 MIPS or 3.0–3.6 V at 100 MIPS. The device supports industrial temperatures (-40 to +85 °C) and offers on-chip JTAG debug.
Feature Summary
- High-speed 8051-compatible core with up to 100 MIPS performance via internal PLL
- Integrated analog subsystem including 10-bit ADC, dual 12-bit DACs, and comparators
- On-chip non-intrusive JTAG debug system for real-time in-circuit debugging
- Flexible digital I/O with programmable crossbar and 5V tolerant ports
Applications
- Portable medical equipment
- Weigh scales
- Test equipment
- Fiber optic systems
Procurement Notes
Verify component status as this series is Not Recommended for New Designs (NRND). Confirm RoHS compliance and package type (GQ suffix indicates QFP packaging). Check for End of Life announcements and Last Time Buy dates before finalizing procurement plans.
Selection Notes
Select this model for applications requiring high analog integration within an 8-bit architecture. Ensure design compatibility with the 2.7V to 3.6V supply range. Verify that the 100-pin TQFP footprint fits the target PCB layout constraints.
Part Context
Part of the C8051F12x/13x family of highly integrated mixed-signal SoCs. Designed for standalone operation with extensive on-chip resources reducing external component count. Part of Silicon Labs' legacy 8-bit MCU portfolio.
Replacement Considerations
Silicon Labs recommends EFM8BB31F64G-QFN32 as a replacement. Note differences in pinout, memory size, and peripheral sets when migrating designs.
FAQ
Does the C8051F126 support 100 MIPS operation?
Yes, the device can operate at 100 MIPS if the supply voltage is maintained between 3.0 V and 3.6 V.
What is the maximum sampling rate of the ADC?
The integrated 10-bit SAR ADC supports a programmable throughput of up to 100 ksps.
