/RC2/RD2 8-bit 80C51 5 V low power 16/32/64 kB flash microcontroller with 1 kB RAM

8-bit 80C51 low power 8 kB flash microcontroller with 256 B RAM, 192 B data EEPROM

5 V, 3.3 V and 2.5 V UART with 16-byte FIFOs

256 x 8-bit static low-voltage RAM with I²C-bus interface

Mono BTL audio amplifier with DC volume control

Stereo BTL audio output amplifier with DC volume control