Atmel AT89S8253 8-bit Microcontroller, 12KB Flash, 44-Pin LCC, SMD

The Atmel AT89S8253-24JU is an advanced 8-bit, low-power, high-performance CMOS microcontroller, offering a versatile solution for embedded control applications. It features 12KB of in-system programmable (ISP) flash program memory and 2KB of EEPROM data memory, manufactured using Atmel's high-density nonvolatile memory technology. The device is fully compatible with the industry-standard MCS-51 instruction set and pinout, ensuring easy integration into existing designs.

A key advantage is the on-chip downloadable flash, which allows the program memory to be reprogrammed in-system via an SPI serial interface or by a conventional nonvolatile memory programmer. This flexibility significantly reduces development time and cost. By combining a powerful 8-bit CPU with re-programmable flash on a single chip, the AT89S8253 provides a highly adaptable and economical solution for a wide range of embedded projects.

Core Features & Specifications

• Memory: 12KB ISP Flash, 2KB EEPROM, 256 Bytes RAM.
• Clock Speed: Operates from 0 to 24 MHz in x1 and x2 modes, with fully static operation.
• I/O & Communication: 32 programmable I/O lines, enhanced UART with framing error detection, and an enhanced SPI (double buffered) serial interface.
• Timers & Interrupts: Three 16-bit timer/counters, a programmable watchdog timer, and a four-level enhanced interrupt controller with nine interrupt sources.
• Power Management: Features low-power idle and power-down modes, with interrupt recovery from power-down, and a power-off flag.
• Additional Hardware: Dual data pointer, internal power-on reset, and three-level program memory lock for software security.
• Supply Voltage: Wide operating range from 2.7V to 5.5V.

This surface-mount device in a 44-pin LCC package is designed for robust performance in industrial environments, with an operating temperature range of -40°C to