SM1124 datasheet(1/10 Pages) NPC

Part #	SM1124

Description	Multimelody IC for Pagers

PDF	10 Pages

Scroll/Zoom	100%

Manufacturer	NPC [Nippon Precision Circuits Inc]

Direct Link	http://www.npc.co.jp/en

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SM1124 Series

NIPPON PRECISION CIRCUITS—1

NIPPON PRECISION CIRCUITS INC.

Multimelody IC for Pagers

OVERVIEW

The SM1124 Series are melody pager multi-melody

ICs fabricated in NPC’s Molybdenum-gate CMOS.

A maximum of 16 tunes can be stored in

programmable ROM, and the Molybdenum-gate

CMOS process realizes small-sized packages and

low power dissipation.

FEATURES

s

Maximum of 16 tune selections (with up to 512

steps)

s

Level hold playback mode

s

External reference clock input. The frequency can

be selected from the following 12 settings.

• Playback frequency of each song varies (8

frequencies)

- 32.768 kHz system: 32.768 and 65.536 kHz

- 37.5 kHz system: 37.5 and 75.0 kHz

- 38.4 kHz system: 38.4 and 76.8 kHz

- 48.0 kHz system: 48.0 and 96.0 kHz

• Playback frequency of all songs is ﬁxed (4

frequencies)

- 32.768 kHz system: 131.072 kHz

- 37.5 kHz system: 150.0 kHz

- 38.4 kHz system: 153.6 kHz

- 48.0 kHz system: 192.0 kHz

s

2-pin serial data tune selection

s

Power save function

s

External clock gating in non-play mode.

s

2.4 to 3.6 V supply voltage

s

8-pin plastic SOP package

s

Molybdenum-gate CMOS process

PINOUT

8-pin SOP

PACKAGE DIMENSIONS

Unit: mm

CLK

SI

SC

ST

VSS

VDD

MTO

TEST

1

4

5

8

0.4 0.1

1.27

0.4 0.2

010

5.2 0.3

0.15

+ 0.10

− 0.05

0.695TYP

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