The CY7C343B-25HC is a single-chip microcontroller developed by Cypress Semiconductor Corporation. It is a member of the Cypress 8-bit 8051 Microcontroller family, based on the 8051 architecture. The core features of the CY7C343B-25HC include 16K bytes of Mask ROM, 4KB of RAM, four 16-bit programmable timers/counters, three serial I/O ports with extended buffer, 16 interrupt sources, Watchdog Timer and a Clock Generator. In addition, its operations are powered by a low-power low-voltage operation, with 5V and 2.7V voltage options and a maximum operating frequency of 25MHz. The CY7C343B-25HC is primarily used in automotive and industrial applications.