10PCS AT89S52-24PU AT89S52 DIP-40 ATMEL Microcontroller CHIP IC | eBay
At89s52 - 8051 Microcontroller
AT89S52-24PU Microchip Technology | Mouser
My TechnoCare AT89S52 IC ATMEL 8051 Microcontroller 40 Pin DIP Mount Chip 8 Bit Microprocessor 8Kb ISP(in System Programming) Flash Memory Up to 33MHz Clock Frequency Speed : Amazon.in: Industrial & Scientific