HT818D0 Datasheet (Holtek Semiconductor Inc)

HT818D0, 22.4-Second LOG-PCM Speech

The HT818D0 is a single chip LOG-PCM voice synthesizer LSI with 22.4-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 HT818D

HT818D0 Features

* Operating voltage: 3.6V~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 wi