8-bit MCU with 8KB FLASH memory, 0.75KB RAM, and 15 ADC channels. Features an 8051 core architecture operating at up to 25MHz, with 16 programmable I/Os. Supports I2C, SPI, UART, USART, SMBus, and 2-Wire interfaces. Includes 4 timers/counters, internal oscillator, and peripherals like Brown-out Detect/Reset, POR, PWM, WDT, and Temp Sensor. Packaged in a 24-pin QSOP with Tin contact plating, operating from -40°C to 85°C with a max supply voltage of 3.6V.
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| Package/Case | QSOP |
| Contact Plating | Tin |
| Core Architecture | 8051 |
| Data Bus Width | 8b |
| Frequency | 25MHz |
| Height | 1.75mm |
| Interface | I2C, SPI, UART, USART, SMBus, 2-Wire |
| Length | 8.65mm |
| Max Frequency | 25MHz |
| Max Operating Temperature | 85°C |
| Min Operating Temperature | -40°C |
| Max Supply Voltage | 3.6V |
| Memory Size | 8KB |
| Memory Type | FLASH, |
| Number of ADC Channels | 15 |
| Number of I/Os | 16 |
| Number of Programmable I/O | 16 |
| Number of SPI Channels | 1 |
| Number of Timers/Counters | 4 |
| Number of UART Channels | 1 |
| Oscillator Type | Internal |
| Packaging | Rail/Tube |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT, Temp Sensor |
| RAM Size | 0.75KB |
| RoHS Compliant | Yes |
| Series | C8051F9xx |
| Watchdog Timer | Yes |
| Width | 3.9mm |
| RoHS | Compliant |
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