HT814D0

HT814D0 8.4-Second LOG-PCM Speech Features · · · · · · · · · · Operating voltage: 2.4V~5.0V Directly drives an external transistor Low standby current (1mA typ. for VDD=3V) Minimal external components 508 words table ROM for key functions Programmable silence length and end-pulse width (minimal end-pulse width is 330ms at a 6kHz sampling rate) 8.4-second voice capacity (based on a 6kHz sampling rate) 12 keys Controllable volume FLAG1 options - End-pulse output - 3HzB flash - 6HzB flash - Voice output indication - Busy output · · · · FLAG2 options - 3Hz flash - 6Hz flash - Busy output Key options - Stop key: KEY12 - Random (only for KEY1) - Sequential (only for KEY1) - Repeat (for all KEYs) - Key debounce time (for all KEYs): 700ms, 22ms, 45ms, 180ms (based on a sampling rate of approximate 6kHz) - One shot (for all KEYs) - Level-trigger - Pull-high resistance (for all KEYs) Section options - Retriggerable - Non-retriggerable Dice form or 20/24-pin DIP/SOP package Applications · · · Leisure products Alarm clocks Public address system · · Alert and warning system Sound effect generators General Description The HT814D0 is a single chip LOG-PCM voice synthesizer LSI with 8.4-second voice capacity at a 6kHz sampling rate. The chip when triggered drives a speaker through an external transistor with a current switch D/A converter output. Negligible current will be consumed in the standby state. The HT814D0 provides 12 key inputs and 2 programmable FLAG outputs. With a 2.4V...