NPC SM1125 Datasheet

SM1125 series

NIPPON PRECISION CIRCUITS INC.

OVERVIEW

The SM1125 series are melody ICs fabricated in
NPC’s Molybdenum-gate CMOS for use in mobile
telecommunications equipment. A maximum of 16
melodies can be stored in programmable ROM.

FEATURES

■

Maximum of 16 melody selections (with up to 512
steps)

■

Level hold playback mode

■

External reference clock input versions and built­in RC oscillator versions available, set by master­slice option (RC oscillator versions require an
external resistor and capacitor).

■

12 selectable clock frequencies (fixed for all melo­dies)

• External clock input versions (12 frequencies)

- 32.768 kHz system: 32.768, 65.536 and

131.072 kHz

- 37.5 kHz system: 37.5, 75.0 and 150.0 kHz

- 38.4 kHz system: 38.4, 76.8 and 153.6 kHz

- 48.0 kHz system: 48.0, 96.0 and 192.0 kHz

• Built-in oscillator versions (4 frequencies)

- 38.4 kHz (standard oscillator frequency)

- 32.768 kHz

- 37.5 kHz

- 48.0 kHz

■

2-pin serial data melody selection and 1-pin mel­ody playback control

■

Power save function

• External clock input versions
Clock gating in no-play modes

• Built-in RC oscillator versions
Oscillator stopped in no-play modes

■

8-pin plastic VSOP package

■

Molybdenum-gate CMOS process

Multimelody IC for Pagers

PINOUT

8-pin VSOP

PACKAGE DIMENSIONS

Unit: mm

OSC

SI
SC
ST

(Top View)

0.575 TYP

0.65

1
2
3
4

0.10

0.22 0.1

1125××

3.1 0.3

6.4 0.3

4.4 0.2

1.15 0.05

0.1 0.05

+

0.12

0.15

8
7
6
5

+ 0.1

− 0.05

M

VSS
VDD
MTO
TEST

0.5 0.2

ORDERING INFORMATION

DEVICE PACKAGE

SM1125 ×× V

1. ×× is v ersion name.

1

8pin VSOP

NIPPON PRECISION CIRCUITS—1

BLOCK DIAGRAM

SM1125 series

OSC

SI

SC

ST

PIN DESCRIPTION

OSC

Gate

Divider

Control

Circuit

Tempo Latch

Tempo Counter

master slice

SW1

1/128

Rhythm
Counter

1/2 or 1/4

Scale

Counter

Scale

ROM

Main

ROM

Multi-

Plexer

Address

Counter

Address

Latch

SW2

VSS

VDD

MTO

TEST

(Pull-down resistance
built-in)

Start

Number Name I/O Function

1 OSC I

2 SI I Playback control serial interface data input
3 SC I Playback control serial interface clock input
4 ST I Playback start/stop control signal input
5 TEST I Test input pin. Leave open or tie to VSS. (Pull-down resistance built-in)
6 MTO O Playback melody signal output
7 VDD – Supply pin (+)
8 VSS – Ground pin

Built-in RC oscillator option: External resistor and capacitor connection pins
External clock input option: External reference clock input (gate circuit b uilt-in)

NIPPON PRECISION CIRCUITS—2

−

−

−

−

°

°

−

° C

−

SPECIFICATIONS

Absolute Maximum Ratings

Parameter Symbol Condition Rating Unit

Supply voltage range V
Input voltage range V
Power dissipation P
Storage temperature range T
Soldering temperature T
Soldering time t

Recommended Operating Conditions

V

= 0 V

SS

DD

VSS

IN

D

stg

sld

sld

−

SM1125 series

∆

0.3 to 5.0 V

V

SS

0.2 to V

+ 0.2 V

DD

100 mW

40 to 125

255

C
C

10 s

Parameter Symbol Condition Rating Unit

Supply voltage V
Operating temperature T

DD

opr

DC Characteristics

Unless otherwise noted T

Parameter Symbol Condition

Supply voltage (1) V
Supply voltage (2) V
Current consumption (1) I

Current consumption (2) I

Current consumption (3) I

Input voltage

Input current (1)

Input current (2) I
Open voltage V

Output voltage

Oscillator frequency f

Frequency stability
Oscillator start voltage V
Oscillator stop voltage V

= − 20 to 70 ° C, V

a

External clock input option 1.5 3.0 3.6 V

DD1

Built-in RC oscillator option 2.0 3.0 3.6 V

DD2

Non-playback mode, T

DD1

External clock input option: Playback mode,

DD2

MTO pin open
Built-in RC oscillator option: Playback mode,

DD3

MTO pin open

V

IH

ST, SI, SC and OSC (External clock input
option) pins

V

IL

ST, SI, SC and OSC (External clock input

I

IH1

option) pins, V
ST, SI, SC and OSC (External clock input

I

IL1

option) pins, V
TEST pin, V

IH2

TEST pin – – 0.1 V

OPN

V

MTO pin, I

OH

V

MTO pin, I

OL

Built-in RC oscillator option: NPC test board
measurement, R

OSC

V

= 2.0 to 3.6V

DD

f/f Built-in RC oscillator option – 0.1 – %/0.1V

Built-in RC oscillator option – – 1.6 V

DOB

Built-in RC oscillator option – – 1.6 V

DOS

= 0 V, V

SS

= 25 ° C – – 0.5 µA

a

= V

, T

IH

DD

a

= 0 V , T

= 25 ° C

IL

a

= V

IH

DD

= 1 mA V

OH

= 1 mA V

OL

= 91 k Ω , C

O

= 25 ° C

O

DD

= 200 pF

= 1.5 to 3.6 V

2.0 to 3.6 V
20 to 70

Rating

min typ max

– 25 200 µ A

– 215 600 µA

V

0.2 – V

DD

V

SS

–V

DD

+ 0.2 V

SS

– – 0.5 µA

– – 0.5 µA

– – 200 µA

0.4 – V

DD

SS

–V

DD

+ 0.4 V

SS

34.5 38.4 42.5 k Hz

Unit

V

V

NIPPON PRECISION CIRCUITS—3

AC Characteristics

SM1125 series

Unless otherwise noted T

= − 20 to 70 ° C, V

a

= 0 V, V

SS

Parameter Symbol Condition

OSC pulse cycle t
OSC HIGH-level pulsewidth t
OSC LOW-level pulse width t
OSC pulse rise time t
OSC pulse fall time t
SC pulse cycle t
SC HIGH-level pulsewidth t
SC L OW-level pulsewidth t
SC pulse rise time t
SC pulse fall time t
SI-SC setup time t
SI-SC hold time t

OSC

OWH

OWL

Or

Of

SC

SWH

SWL

Sr

Sf

DS

DH

“OSC input pulse (External clock
input option)” timing

“SC input pulse” timing

“SC-SI serial input pulse” timing

OSC input pulse (External clock input option)

tt

OWH

t

OSC

OWL

= 1.5 to 3.6 V

DD

t

Of

Rating

min typ m ax

5.0 – – µs

2.0 – – µs

2.0 – – µs
– – 200 ns
– – 200 ns

5.0 – – µs

2.0 – – µs

2.0 – – µs
– – 200 ns
– – 200 ns

2.0 – – µs

2.0 – – µs

V

0.9VDD

0.1VDD

t

Or

IH

0.5VDD
V

IL

Unit

SC input pulse

t

SWH

SC-SI serial input pulse

SC

SI

V

IH

IH

0.5VDD
V

IL

0.9VDD

0.1VDD

t

SWL

t

SC

OWL

t

Sf

t

Sr

V

0.5VDD
V

IL

t

DS

t

DH

V

IH

0.5VDD
V

IL

NIPPON PRECISION CIRCUITS—4