8-Bit Microcontroller (MCU) featuring an 8051 core architecture, operating at a maximum frequency of 25MHz. This CMOS device offers 8KB of FLASH memory and 0.75KB of RAM, with 16 programmable I/O pins. Integrated peripherals include I2C, SPI, UART, USART, SMBus, and 2-Wire interfaces, alongside 4 timers/counters, 15 ADC channels, and a watchdog timer. The QFN package has tin contact plating, a width of 4mm, length of 4mm, and a height of 0.8mm, with an operating temperature range of -40°C to 85°C.
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| Package/Case | QFN |
| Contact Plating | Tin |
| Core Architecture | 8051 |
| Data Bus Width | 8b |
| Frequency | 25MHz |
| Height | 0.8mm |
| Interface | I2C, SPI, UART, USART, SMBus, 2-Wire |
| Length | 4mm |
| Max Frequency | 25MHz |
| Max Operating Temperature | 85°C |
| Max Supply Voltage | 3.6V |
| Memory Size | 8KB |
| Memory Type | FLASH, |
| Min Operating Temperature | -40°C |
| 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 | 4mm |
| RoHS | Compliant |
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