This is an 8-bit 8051 CISC microcontroller with 4KB of Flash memory operating at 3.3V or 5V. It comes in a 20-pin SOIC package and is supplied in a tube.
You can click on the BUY or RFQ button to purchase AT89S405124SU from an authorized Microchip Technology distributor.
You can download the AT89S405124SU datasheet or visit the Microchip Technology website for support.
Microchip Technology