IS22C040

www.DataSheet4U.com IS22C040 IS22C040 32 to 40 SEC INSTANT VOICE ROM GENERAL DESCRIPTION ISSI OCTOBER 1998 ISSI ® ® FEATURES Voice length at – 8 KHz sampling is 32 seconds – 6 KHz sampling is 40 seconds Silence compression to save memory Eight trigger pins, S1 to S8 for 32 sections SBT pin play-all or sequential play-all 15 ms debounce time suitable for CDS IRP interrupt pin stops playback at once STP stop pulse generated at end of playback BUSY signal for CPU control Two LEDs flash at 3 Hz interval 3.0V to 6V single power supply operation Low standby current (<5 µA at 3V) Auto-power down Built-in oscillator, D/A converter, EPROM ADPCM data compression Optional pop noise elimination function COUT pin drives speaker with a transistor Development tools support VOUT1 and VOUT2 drives buzzer directly Sampling rate determined by external resistor Holdable and unholdable triggering option Industrial temperature available IS22C040 is a high-quality voice synthesizer with a capacity of 32 to 40 seconds. A proprietary ADPCM algorithm is used. The audio message is stored in a 1024-Kbit on-chip EPROM. The IS22C040 eliminates the need of complicated circuitry in voice playback (Figure 1) but still achieves high voice quality. Sounds such as human speech, animal sounds, musical sounds, and even special sound effects can be synthesized. Devices can be cascaded to achieve longer voice duration (Figure 3). Two devices can be configured in par...