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Product Detailed Parameters
- Description：IC MCU 8BIT 8KB FLASH 20QFN
- Series：C8051F9xx
- Mfr：Silicon Labs
- Package：Tape & Reel (TR)
- Core Processor：CIP-51 8051
- Core Size：8-Bit
- Speed：25MHz
- Connectivity：SMBus (2-Wire/I2C), SPI, UART/USART
- Peripherals：Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O：16
- Program Memory Size：8KB (8K x 8)
- Program Memory Type：FLASH
- EEPROM Size：-
- RAM Size：512 x 8
- Voltage - Supply (Vcc/Vdd)：1.8V ~ 3.6V
- Data Converters：-
- Oscillator Type：Internal
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Supplier Device Package：20-QFN (3x3)
- Package / Case：20-UFQFN Exposed Pad
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Overview
The C8051F981-GMR is an 8-bit microcontroller from the Silicon Labs C8051F9xx series, utilizing the CIP-51 core architecture. It integrates 8KB of in-system programmable Flash memory and 512 bytes of RAM. The device operates at a maximum clock frequency of 25MHz and supports a supply voltage range of 1.8V to 3.6V. It features 16 general-purpose I/O pins and is housed in a 20-QFN package. The component includes four timer/counters and supports Enhanced SPI, Enhanced UART, I2C, and SMBus interfaces.
Feature Summary
- Integrates high-speed 8-bit CIP-51 processor with in-system programmable Flash for code storage.
- Provides multiple communication peripherals including Enhanced SPI, Enhanced UART, I2C, and SMBus interfaces.
- Includes four timer/counters for precise timing control and event counting applications.
Applications
- Battery-powered embedded systems requiring low voltage operation
- Industrial control devices utilizing serial communication protocols
- Simple sensor interface nodes with limited I/O requirements
Procurement Notes
Verify current availability status as this specific part number may be discontinued or subject to obsolescence notices. Confirm package marking and revision level against latest datasheets before procurement. Ensure compatibility with existing design-in tools and debuggers if upgrading from previous revisions.
Selection Notes
Select this component for designs requiring a compact 20-pin footprint with basic serial connectivity. Compare against C8051F980 variants if analog-to-digital conversion capabilities are not required. Evaluate power consumption specifications against system battery life requirements given the 1.8V minimum operating voltage constraint.
Part Context
This MCU belongs to the C8051F9xx family, which focuses on cost-effective solutions for simple control tasks. The family shares architectural similarities with other C8051F series devices but offers specific memory and peripheral configurations tailored for volume production applications.
Replacement Considerations
Public documentation indicates the C8051F980-C-GMR as a related variant within the same series. Verify functional equivalence regarding peripheral availability and pinout compatibility before substitution.
