The STC12C5628AD-35I-SKDIP28 is an integrated circuit manufactured by STC. It is a DIP-28 package with 300mil RoHS (Restriction of Hazardous Substances) certification. It is designed for applications such as smart meters and home appliances. The STC12C5628AD-35I-SKDIP28 contains a 8-bit 8051 microcontroller with 35 kB of Flash ROM, 1 KB of SFR and 2 KB of SRAM, AES Encryption/Decryption Unit, SPI and I2C serial bus interface, UART, two 16-bit timers/counters, two 8-bit PWM timers, a 12-cycle watchdog timer and 11 interrupt sources.