SM1125V 查看數據表（PDF） - Nippon Precision Circuits

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SM1125V

Multimelody IC for Pagers

Nippon Precision Circuits  

SM1125 series

Multimelody IC for Pagers

OVERVIEW

The SM1125 series are melody ICs fabricated in NPC’s Molybdenum-gate CMOS for use in mobile telecom-

munications equipment. A maximum of 16 melodies can be stored in programmable ROM.

FEATURES

I Maximum of 16 melody selections (with up to 512

steps)

I Level hold playback mode

I External reference clock input versions and built-

in RC oscillator versions available, set by master-

slice option (RC oscillator versions require an

external resistor and capacitor).

I 12 selectable clock frequencies (fixed for all melo-

dies)

• External clock input versions (12 frequencies)

- 32.768kHz system: 32.768, 65.536 and

131.072kHz

- 37.5kHz system: 37.5, 75.0 and 150.0kHz

- 38.4kHz system: 38.4, 76.8 and 153.6kHz

- 48.0kHz system: 48.0, 96.0 and 192.0kHz

• Built-in oscillator versions (4 frequencies)

- 38.4kHz (standard oscillator frequency)

- 32.768kHz

- 37.5kHz

- 48.0kHz

I 2-pin serial data melody selection and 1-pin mel-

ody playback control

I Power save function

• External clock input versions

Clock gating in no-play modes

• Built-in RC oscillator versions

Oscillator stopped in no-play modes

I Molybdenum-gate CMOS process

I 8-pin plastic VSOP package

PINOUT

(Top view)

OSC

1

SI

2

SC

3

ST

4

8

VSS

7

VDD

6

MTO

5

TEST

PACKAGE DIMENSIONS

(Unit: mm)

0.575 TYP

3.1 ± 0.3

+ 0.1

0.15 − 0.05

0.65

0.10

0.22 ± 0.1

+ 0.12 M

ORDERING INFORMATION

Device

SM1125××V

Package

8pin VSOP

SEIKO NPC CORPORATION —1

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