TC8831F-1

The TC8831F-1 is a kind of single chip CMOS LSI for voice recording/play-back using the ADM (adaptive delta modulation). TC8831F-1 includes a voice recording system with a dynamic RAM for voice memory and an audio circuit including a microphone, speaker, amplifier, etc, as an external circuit.

There are some features of TC8831F-1 as follows: (1)DRAMs (dynamic RAM) are used as a voice data memory up to 4 pieces of 256 Kbit, 4 pieces of 1M, or 4 pieces of 4M; (2)connectable to microprocessor easily and controlled by 13 kinds of command; (3)various switch controls are available for manual control and optimum control method can be selected according to application; (4)4 kinds of bit rates (32K, 22K, 16K, 11K bps) are provided; (5)voice trigger start function at recording; (6)on-chip ceramic oscillation circuit for recording/play-back; (7)single 5 V power supply; (8)60-pin mini flat package.

The following is about the absolute maximum ratings of TC8831F-1: (1)VDD, supply voltage: -0.3 to 6.0 V; (2)VIN, input voltage: -0.3 to VDD+0.3 V; (3)VOUT, output voltage: -0.3 to VDD+0.3 V; (4)TSTG, storage temperature: -55 to 125.