SM8230A datasheet(1/7 Pages) NPC

No de pièce	SM8230A

Description	Tone Dialer with Built-in Piezo Driver

Download	7 Pages

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Fabricant	NPC [Nippon Precision Circuits Inc]

Site Internet	http://www.npc.co.jp/en

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SM8230A

NIPPON PRECISION CIRCUITS—1

NIPPON PRECISION CIRCUITS INC.

OVERVIEW

The SM8230A is a dual-tone signal generator LSI

developed for DTMF (dual tone multi-frequency)

dialing. It features a built-in piezo-electric speaker

driver for direct connection to a piezo-electric

buzzer.

The DTMF frequencies can be set to correspond to

the DTMF standards of any country. The output level

is also adjustable under software control. These

features, combined with its small package and low

power dissipation, make the SM8230A a very use

device to use.

FEATURES

s

3-line serial interface to external CPU

s

2 independent, adjustable frequency outputs

s

Piezo driver for direct connection to a piezo-

electric buzzer

s

4 system clock frequencies selectable (480 kHz,

960 kHz, 1.92 MHz, 3.84 MHz)

s

2.6 to 3.3 V supply voltage

s

Low current consumption

• 3.0 mA (max) operating current

• 1 µA (max) standby current

s

8-pin plastic SOP

PINOUT

PACKAGE DIMENSIONS

VDD

5

4

8

1

BZH

BZL

CLK

SD

SCL

OE

VSS

0.4 0.1

1.27

0.4 0.2

010

5.2 0.3

0.15

+ 0.10

− 0.05

Tone Dialer with Built-in Piezo Driver

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SM8230A Fiches technique(PDF) 1 Page - Nippon Precision Circuits Inc

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