Microchip Technology SST89E58RD2-40-I-TQJE Connectivity: EBI/EMI, SPI, UART/USART Core: C51 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: 1925579 Interface Type: SPI Maximum Clock Frequency: 40 MHz Maximum Operating Temperature: + 85 C Minimum Operating Temperature: - 40 C Mounting Style: SMD/SMT Number Of I /o: 36 Number Of Programmable I/os: 5 Number Of Timers: 3 Operating Supply Voltage: 4.5 V to 5.5 V Operating Temperature: -40?°C ~ 85?°C Oscillator Type: External Package / Case: 44-TQFP Peripherals: Brown-out Detect/Reset, POR, WDT Processor Series: FlashFlex51 Program Memory Size: 32KB (32K 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