Microcontroller,
W79E4051ASG 8051 Core UART/USART Microcontroller, 4KB FLASH, 17 I/Os, -40°C to 85°C
W79E2051RASG 8051 Microcontroller, 2KB FLASH, 17 I/Os, UART, USART, SOIC
W79E2051ARG 8051 Core UART/USART Microcontroller, 2KB FLASH, 17 I/Os, SSOP