SM8230A_06 Datasheet, PDF (1/8 Pages) NEC – Tone Dialer with Built-in Piezo Driver

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