AT89S51-24AI. Analog peripheral circuits: -. Component family: microcontroller. Configuration: surface-mounted component (SMD). Digital interface circuits: UART. Digital peripheral circuits: WDT. Housing (JEDEC standard): -. Housing: TQFP44. MCU circuit family: ATMEL AT89. MCU type: 8-bit microcontroller. Max temperature: +85°C.. Number of I/O: 32. Number of terminals: 44. Program storage memory type: 'FLASH' memory. Program storage memory: 4 KByte. RoHS: no. Storage memory capacity: 128 Bytes. Storage memory type: SRAM. [MHz]: 24 MHz. [V]: +5.5V. Original product from manufacturer: Microchip (atmel). Quantity in stock updated on 12/11/2025, 21:03