SM1155 series

NIPPON PRECISION CIRCUITS—2

PAD DESCRIPTION

SPECIFICATIONS

Absolute Maximum Ratings

Electrical Characteristics

Number

Name

i/o

Function

1T 2

–

Test pins (must be open)

2T 1

3T G

1. Built-in pull-down resistor (the resistance of the pull-down resistor varies with the applied voltage, as described in the Electrical Characteristics).

Melody mode control input

4

V S S

–

G round

5

OUT

o

Piezoelectric speaker driver outputs. Both pins are LOW in non-play mode. OUT is LOW and O U T is HIGH

during output for a musical rest note. Both pins are HIGH during the gap between musical notes.

6

OUT

7

V D D

–

8

T C

–

Test pins (must be open)

P arameter

Symbol

Condition

Rating

Unit

Supply voltage range

−0.3 to 5.0

V

Input voltage range

V

O p e rating temperature range

−20 to 80

°C

Storage temperature range

−55 to 125

°C

P arameter

S y m b o l

Condition

Rating

Unit

min

typ

m a x

O p e rating voltage

1.2

1.5

3.6

V

1. Measurement circuit

Non-play mode

–

0.01

0.3

µ A

Melody modes: O U T, O U T open

–

2 5

5 0

µ A

T G L OW -level input voltage

––

V

TG HIGH-level input voltage

–

–

V

T G L OW -level input current

1.4

3.0

6.0

µ A

TG HIGH-level input current

1.4

3.0

6.0

µ A

OUT, OUT L OW -level output current

2.0

–

–

m A

OUT, OUT HIGH-level output current

2.0

–

–

m A

Internal oscillator frequency

– 2 0

–

+ 2 0

%

H

SM1155

×××1S

L evel hold 1

SM1155

×××2S

L evel hold 2

SM1155

×××3S

One-shot

L/open

SM1155

×××1S/ 2S/ 3S

Non-play

VDD

VSS

A

1.5V

2. Measurement circuit

VDD

TG

VSS

A

1.5V