AT89C55WD-24AU

The AT89C55WD-24AU is a low-power, high-performance CMOS 8-bit microcontroller from Microchip Technology (formerly Atmel). It utilizes the industry-standard 8051 core and offers 20KB of Flash program memory, 256 bytes of internal RAM, and 32 programmable I/O lines.

Key specifications: Operating at a maximum clock frequency of 33 MHz with a speed of 24 MHz, the device supports a supply voltage range of 4V to 5.5V. It includes three 16-bit timer/counters, a programmable serial channel (UART/USART), eight interrupt sources, a hardware watchdog timer, and dual data pointers. The microcontroller operates over an industrial temperature range of -40°C to 85°C.

Design and application: The on-chip Flash allows for user programmability with 10,000 write/erase cycles. The static logic design enables operation down to zero frequency, and low-power modes (Idle and Power-down) are supported for energy-sensitive applications. The 8-bit data bus and 16-bit address bus provide compatibility with a wide range of memory and peripherals.

Packaging: The device is supplied in a 44-pin TQFP package (10x10 mm, 0.80 mm pitch) with surface mount gull wing leads. It is available in a green (Pb/Halide-free) packaging option, complying with RoHS requirements.