SM8230A Ver la hoja de datos (PDF) - Nippon Precision Circuits

Número de pieza

componentes Descripción

Fabricante

SM8230A

Tone Dialer with Built-in Piezo Driver

Nippon Precision Circuits  

BLOCK DIAGRAM

SM8230A

SD

SCL

OE

CLK

VSS

Programmable

Counter

High Group

ROM

D/A

Converter

Output

Control

LATCH

SELECTOR

Programmable

Counter

Low Group

ROM

D/A

Converter

Output

Control

VDD

BZH

BZL

PIN DESCRIPTION

Number

1

2

Name

SD

SCL

3

OE

4

VSS

5

CLK

6

BZL

7

BZH

8

VDD

I/O

Description

I

Serial data input

I

Serial data transfer clock input.

(For valid transfer, OE must stay LOW for 16 clock cycles.)

I

DTMF output enable/serial data transfer select input.

Serial data transfer is selected when LOW.

–

Ground

I

System clock input. The clock can be set to one of four frequencies (480 kHz, 960

kHz, 1.92 MHz, 3.84 MHz).

O

DTMF low-frequency group analog output

O

DTMF high-frequency group analog output

–

Supply voltage

NIPPON PRECISION CIRCUITS—2

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