DS89C450-MNG 8-bit, 25 MHz, 64kB Flash Microcontroller, 2 PieceLotCondition:* New Old Stock, No OEM Packaging. As Pictured.Additional Notes:* Series: 89C* Core Processor: 8051* Core Size: 8-bit* Speed: 25 MHz* Connectivity: EBI/EMI, SIO, UART/USART* Number of I/O: 32* Program Memory Size: 64kB (64K x 8)* Program Memory Type:Flash* RAM Size: 1k x 8* Supply Voltage: 4.5-5.5 Volt DC* Oscillator Type: External* Operating Temperature: -40C To +85C* Mounting Type: Through-Hole* Device Package: 40-PDIP* Package: 40-DIP (0.600″, 15.24mm)UNKDS89C450-MNG