Microchip Technology SST89E54RDA-40-C-PIE Connectivity: EBI/EMI, SPI, UART/USART Core: 8051 Core Processor: 8051 Core Size: 8-Bit Data Bus Width: 8 bit Data Converters: - Data Ram Size: 1 KB Eeprom Size: 8K x 8 ID_COMPONENTS: 1925596 Interface Type: SPI Maximum Clock Frequency: 40 MHz Maximum Operating Temperature: + 70 C Minimum Operating Temperature: 0 C Mounting Style: Through Hole Number Of I /o: 32 Number Of Programmable I/os: 32 Number Of Timers: 3 Operating Temperature: 0?°C ~ 70?°C Oscillator Type: External Package / Case: 40-DIP (0.600", 15.24mm) Peripherals: Brown-out Detect/Reset, POR, WDT Processor Series: SST89xxxRD Program Memory Size: 16KB (16K x 8) Program Memory Type: FLASH Ram Size: 1K x 8 Series: FlashFlex?® Speed: 40MHz Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V