SM1350 datasheet(1/21 Pages) NPC

Teilenummer	SM1350

Bauteilbeschribung	High Tone Quality Melody LSI

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Hersteller	NPC [Nippon Precision Circuits Inc]

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

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SM1350 series

NIPPON PRECISION CIRCUITS—1

NIPPON PRECISION CIRCUITS INC.

High Tone Quality Melody LSI

OVERVIEW

The SM1350 series are single-chip high tone quality

melody ICs, fabricated using NPC’s Molybdenum-

gate CMOS process. Melodies are selected in serial

or binary (parallel) mode, up to a maximum of 16

melody blocks. There are 4 sound generators

incorporated to produce 4 kinds of output tone

controlled by 16-tone data, making these ICs ideal

for mechanical clocks and similar applications where

high tone quality output is demanded.

FEATURES

s

Basic Functions

• 4.0 MHz oscillator frequency

• Power-save function

- Oscillator stopped when no output

- S0 to S3, MODE, LH pull-up resistors open

• BTL or A-class outputs

• Chattering prevention circuit (STN, STOP, S0

to S3)

• 10-bit D/A converter

s

Sound Generator Functions

• DWS (dual wave synthesis) sound generators

• 4 simultaneous sounds for 4 tones

• G2 to F#7 note range

• 16-tone programmable

s

Melody Functions

• Up to 16 programmable melodies (singly or in

medleys)

• 1024-step length (notes, rests, jumps, end

codes)

• Level hold/one-shot melody modes

• Serial/binary (parallel) select modes

• 4.8 to 605.6 tempo range in 127 steps

• 12 rhythm values

• Ties and slurs programmable

s

Control Signal Outputs

• BUSYN signal LOW during melody output

• CT signal output for external control

s

2.4 to 5.5 V supply voltage

s

Package

• 24-pin SSOP (SM1350

×××)

s

Molybdenum-gate CMOS

PINOUT(TOP VIEW)

PACKAGE DIMENSIONS

24-pin SSOP (Unit: mm)

ORDERING INFOMATION

3

D evice

Packag e

SM1350

×××M

24pin SSOP

VDD

S0

S1

S2

S3

MODE

LH

XT

XTN

TO

T3N

T2N

T1N

MSBN

STOP

MSB

STN

BUSYN

CT

SP

SPN

VOL

ICN

VSS

1

12

13

24

0.7

0.8

0.36 0.10

10.20 0.30

10.05 0.20

0.15

+ 0.1

− 0.05

010

0.50 0.20

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