HT81R03 Datasheet (Holtek Semiconductor Inc)

HT81R03, EasyVoice Speech

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.

HT81R03 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