8-bit microcontroller featuring an 8051 core architecture and 25MHz clock speed. This CMOS device offers 32KB of FLASH memory and 4.25KB of RAM, with 24 programmable I/O pins. Integrated peripherals include I2C, SPI, UART, USART, SMBus, and 2-Wire interfaces, alongside 6 PWM channels and 4 timers/counters. Operating from 1.8V to 3.6V, it supports temperatures from -40°C to 85°C and comes in a 24-pin QFN package.
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| Package/Case | QFN |
| Core Architecture | 8051 |
| Data Bus Width | 8b |
| Frequency | 25MHz |
| Interface | I2C, SPI, UART, USART, SMBus, 2-Wire |
| Max Frequency | 25MHz |
| Max Operating Temperature | 85°C |
| Max Supply Voltage | 3.6V |
| Memory Size | 32KB |
| Memory Type | FLASH, |
| Min Operating Temperature | -40°C |
| Min Supply Voltage | 1.8V |
| Number of I/Os | 24 |
| Number of Programmable I/O | 24 |
| Number of PWM Channels | 6 |
| Number of Timers/Counters | 4 |
| Oscillator Type | Internal |
| Package Quantity | 91 |
| Packaging | Rail/Tube |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT, Temp Sensor |
| Radiation Hardening | No |
| RAM Size | 4.25KB |
| Reach SVHC Compliant | Unknown |
| RoHS Compliant | Yes |
| Series | C8051F9xx |
| RoHS | Compliant |
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