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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, Cap Sense, 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 C8051F991-GMR is an 8-bit microcontroller from the Silicon Labs C8051F9xx series, featuring a CIP-51 core operating at up to 25MHz. It integrates 8KB of in-system programmable Flash memory and 512 bytes of RAM. The device includes a 12-bit ADC, two PWM units, one SPI interface, and one UART. It operates on a supply voltage range of 1.8V to 3.6V within a temperature range of -40°C to +85°C. The component is housed in a compact 20-QFN (3x3) package.
Feature Summary
- Integrates a high-performance 8-bit CIP-51 core with Harvard architecture for efficient instruction execution.
- Includes built-in analog peripherals such as a 12-bit ADC and multiple PWM channels for signal control.
- Supports standard digital communication interfaces including SPI and UART for system connectivity.
- Features low-voltage operation suitable for energy-sensitive embedded applications.
Applications
- Battery-powered sensor nodes
- Low-power industrial control systems
- Portable medical devices
Procurement Notes
Verify the specific suffix 'GMR' indicates the tape-and-reel packaging variant when ordering. Confirm RoHS compliance status and moisture sensitivity level requirements against your assembly process specifications. Ensure the 20-QFN footprint matches your PCB design guidelines before finalizing procurement.
Selection Notes
Select this model if your application requires an 8-bit MCU with integrated 12-bit ADC capabilities and minimal pin count. Compare against other C8051F9xx variants if higher Flash capacity or additional I/O lines are necessary. Consider the 25MHz maximum clock speed relative to your processing throughput requirements.
Part Context
This component belongs to the Silicon Labs C8051F9xx family of mixed-signal microcontrollers. These devices combine a fast 8051-compatible CPU with extensive on-chip peripherals, reducing the need for external components. The series is designed for cost-sensitive and space-constrained embedded designs requiring mixed-signal processing.
FAQ
What is the resolution of the integrated ADC?
The C8051F991-GMR features a 12-bit Analog-to-Digital Converter.
Does this part support USB communication?
No, the C8051F991-GMR does not include a USB interface; it supports SPI and UART.
