HT81012

HT81xxx EasyVoiceTM Speech Features · Operating voltage: 2.4V~5V · Directly drives an external transistor · PWM function directly driver speaker · Low standby current (1mA typ. for VDD=3V) · Minimal external components · 240 notes table ROM for key functions · Programmable silence length and end-pulse width (minimal end-pulse width is 1.3ms at 8kHz sampling rate) · Controllable volume · FLAG1 options - End-pulse output - 3Hz, 3HzB flash - 6Hz, 6HzB flash - Busy output - OFF · FLAG2 options - 3Hz flash - 6Hz flash - Busy output - OFF · 6 keys (Directed) · 8 keys (Matrix key) · Key options - Sequential/Directed - Repeat (KEY2~KEY6) - STOP key (KEY6) - Key debounce time: 1.2ms, 22ms, 45ms (based on a 8kHz sampling rate) - One shot/Normal - Pull-high resistance: 0, 50kW, 100kW, 200kW · Section options - Retriggerable - Non-retriggerable · Package types: HT81006/009/012/018: 16-pin DIP package HT81R09/R18/R36: 16-pin SOP package Applications · Leisure products · Alarm clocks · Alert and warning system · Sound effect generators General Description The EasyVoiceTM is a single-chip voice synthesizer LSI . The chip when triggered drives a speaker directly or through an external transistor with a PWM output. Negligible current is consumed in the standby state. The HT81xxx provides direct key or Matrix key input and 2 programmable FLAG outputs. With 2.4V~5.0V power supply, a complete synthesized voice playback system can be easily built with very few external components. The custo...