IL91531 - Parallel Input Tone/Pulse Dialer

IK Semiconductor

General Description

Pin No.

Tone mode select input.

When this input is high, the tone output and ASK output are normal.

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IL91531 parallel input tone/pulse dialer by IK Semiconductor - Datasheet Preview

Datasheet Details

Part number	IL91531
Manufacturer	IK Semiconductor
File Size	303.84 KB
Description	Parallel Input Tone/Pulse Dialer
Datasheet	IL91531 Datasheet

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IL9151-3	Pulse Dialer
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Full PDF Text Transcription (Reference)

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TECHNICAL DATA IL91531 PARALLEL INPUT TONE/PULSE DIALER High-Performance Silicon-Gate CMOS The IL91531 provides a 4-bit data input and a handshaking signal to serve as microcomputer interfaces. Under microcomputer control the IL91531 generates both a DTMF signal and a pulse output for telephone dialing. All necessary dual-tone frequencies and dial pulse outputs are derived from the widely used TV crystal standard, providing high accuracy and stability. The required sinusoidal waveform for individual tones is digitally synthesized on the chip, resulting in a waveform with very low total harmonic distortion. • 4-bit parallel data input from microcomputer • TTL compatible inputs and outputs • Uses TV crystal standard (3.