TC8832F

The TC8832F is a single chip CMOS LSI for voice recording/play-back using the ADM(adaptive delta modulation).It composes 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.Since TC8832F has power down function, the voice recording / play-back system decreases power consumption.

Features of the TC8832F are:(1)low power consumption(Power down function); (2)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; (3)It's connectable to microprocessor easily and controlled by 13 kinds of command; (4)capable of recording / play-back maximum 16 phrases at the manual control; (5)various switch controls are available for manual control and optimum control method can be selected according to application; (6)4 kinds of bit rates(32K, 22K,16K,11K bps ) are provided; (7)recording/play-back time is up to four minutes and sixteen seconds(with four 1Mbit DRAMS and bit rate to be 16K bps); (8)voice trigger start function at recording; (9)on-chip microphone amplifier for recording and band-pass filter for play-back. Two kinds of band-pass filter cut-off frequencies are available; (10)on-chip ceramic oscillation circuit for recording / play-back; (11)on-chip RC oscillation circuit to refresh DRAbIs during power down mode; (12)single 6V power supply; (13)60-pin mini flat package.

The absolute maximum ratings of the TC8832F can be summarized as:(1)supply voltage:-0.3 to 6.0V;(2)input voltage:-0.3 to Vdd+0.3V;(3)output voltage:-0.3 to Vdd+0.3V;(4)storage temperature:-55 to 125.Bit rate is written at both the manual control and CPU control. Read out of bit rate at time of play-back, however, is carried out only at the CPU control. At the CPU control, the same value of bit rate at the recording is automatically set as the bit rate for the play-back. However, at the manual control, the bit rate at the recording and that at the play-back can be set independently by BPSO and BPSl terminals.