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SM8230AS

Tone Dialer with Built-in Piezo Driver

NEC => Renesas Technology 

SM8230A

Tone Dialer with Built-in Piezo Driver

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 fre-

quencies 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

I 3-line serial interface to external CPU

I 2 independent, adjustable frequency outputs

I Piezo driver for direct connection to a piezo-elec-

tric buzzer

I 4 system clock frequencies selectable

(480kHz, 960kHz, 1.92MHz, 3.84MHz)

I 2.6 to 3.3V supply voltage

I Low current consumption

• 3.0mA (max) operating current

• 1µA (max) standby current

I Package: 8-pin plastic SOP

PINOUT

(Top view)

SD 1

SCL

OE

VSS 4

8 VDD

BZH

BZL

5 CLK

ORDERING INFORMATION

Device

SM8230AS

Package

8-pin SOP

PACKAGE DIMENSIONS

(Unit: mm)

Peripheral

5.2 ± 0.3

1.27

0.4 ± 0.1

0.15

+

−

0.10

0.05

0 to 10

0.4 ± 0.2

SEIKO NPC CORPORATION —1

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