Atmel AT89S8253-24PI 8-bit MCS-51 Microcontroller, 12 KB ISP Flash
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Prices updated: 13 Oct 2026
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About this product
The AT89S8253-24PI is an 8-bit microcontroller compatible with the industry-standard MCS-51 (8051) instruction set and pinout. It has 12 KB of in-system programmable flash and 2 KB of EEPROM, and can be reprogrammed over an SPI serial interface. The -24 suffix indicates a 24 MHz maximum clock, and the PI suffix denotes a PDIP package with industrial temperature grade.
Specifications
- Core
- MCS-51 (8051) compatible
- Flash memory
- 12 KB ISP
- EEPROM
- 2 KB
- Maximum clock
- 24 MHz
- Programming interface
- SPI (ISP)
- Package
- PDIP (P)
- Temperature grade
- Industrial (I)
Frequently asked questions
How do I program it?
Use an ISP programmer over SPI, or a parallel programmer. For writing C code, common 8051 toolchains include SDCC and Keil C51. The Arduino IDE does not target this chip directly.
What does the chip need to run?
Like most 8051 designs, it needs a clock source (commonly a crystal with two load capacitors) and a reset circuit. 12 MHz is a common crystal choice for 8051 projects, though the chip supports up to 24 MHz.
