NPC CF1155 Datasheet

CF1155 series

NIPPON PRECISION CIRCUITS INC.

Melody LSIs

OVERVIEW

The CF1155 series are CMOS melody LSIs that, together with a battery and piezoelectric buzzer, operate in
one of 3 melody modes determined by input level or bonding options. The y also feature an oscillator stop func­tion in non-play mode and a variable pull-down resistance function that responds to input levels in order to
reduce power consumption, reduce cost, and extend battery life, making them ideal in a wide range of applica­tions including greeting cards and toys.

FEATURES

■

Requires few external components

■

1.2 to 3.6V wide operating voltage range

■

Low power consumption

■

3 melody modes (bonding option)

■

Oscillator stop function in non-play mode

■

Power saving pull-down resistor built-in

■

RC oscillator circuit

■

Power-ON initialization function

■

2 V

pad connections

SS

■

Wide pitch dynamic range (G

■

Chip form

to D

3

)

7

PAD LAYOUT and COORDINATES

(Unit: µm)

VDD

TC

T2
T1

(0,0)

OUT OUT

23

4

5
6

78910

HA1155

VSS

TO OSH

Chip size: 1.23 × 1.23mm

Chip thickness: 300 ± 30µm

T1, T2, T C , and TO bonding is not required.

1

11

LH

ORDERING INFORMATION

De vice Pack ag e

CF1155 Chip form

(1230,1230)

VSS

Number Pad X Y

1 OUT 930 1075
2 OUT 529 1075
3 V DD 155 1075
4 TC 155 887
5 T2 155 608
6 T1 155 420
7 VS S 223 155
8 TO 486 155

9 O SH 750 155
10 LH 1041 155
11 VS S 1075 420

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−

−

−

−

°

−

° C

∆

∆

CF1155 series

PAD DESCRIPTION

Name Function

OSH, LH

OUT, OUT

VD D Supply. The rear surface of the chip is V

Melody mode control inputs. Built-in pull-down resistors mean LOW-level signals are obtained when inputs are open circuit. The
resistance of the pull-down resistor varies with the applied voltage, as described in the Electrical Characteristics.

Piezoelectric speaker driver outputs. Both pins are LOW in non-play mode. OUT is LOW and OU T is HIGH dur ing output for a
musical rest note. Both pins are HIGH during the gap between musical notes.

level.

DD

VS S Ground

T1, T2, T C Test inputs. Pull-down resistor built-in.

TO Test output. The oscillator frequency (typ. 50kHz) is output for monitoring pur poses.

SPECIFICATIONS

Absolute Maximum Ratings

Parameter Symbol Condition Rating Unit

Supply voltage range V
Input voltage range V
Operating temperature range T
Storage temperature range T

Electrical Characteristics

T

= 25 ° C, V

a

Operating voltage V
Current consumption
Current consumption
LH, OSH LOW-level input voltage V
LH, OSH HIGH-level input voltage V
LH, OSH LOW-level input current I
LH, OSH HIGH-level input current I
OUT, OUT L OW -level output current I
OUT, OUT HIGH-level output current I
TO oscillator frequency f

TO frequency stability (relative to
voltage)

TO oscillator start voltage V
TO oscillator stop voltage V

1. Measurement circuit

= 0V, V

SS

DD

= 1.5V

Parameter Symbol Condition

1
2

DD

DD

I

DD1

I

DD2

IL
IH

OL

OH

OSC

f/f
f/f

DOB
DOS

IN
opr
stg

V

SS

0.3 to 5.0 V

V

SS

0.2 to V

+ 0.2 V

DD

20 to 80

65 to 150

Rating

min typ max

1.2 1.5 3.6 V
Non-play mode – 0.01 0.3 µ A
Melody modes: OUT, O U T open – 25 50 µA

IL
IH

V

= 0.4V 0.7 1.5 3.0 µ A

IL

V

= 1.5V 0.7 1.5 3.0 µ A

IH

V

= 0.75V 2.0 – – mA

OL

V

= 0.75V 2.0 – – mA

OH

––V

V

– 0.2 – – V

DD

SS

35 50 65 kHz

V

1
2

= 1.2 to 2.0V – 1 – %/0.1V

DD

V

> 2.0V – 2 – %/1V

DD

– – 1.2 V
– – 1.2 V

2. Measurement circuit

C

Unit

+ 0.2 V

1.5V

VDD

A

VSS

1.5V

VDD

A

LH VSS

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CF1155 series

FUNCTIONAL DESCRIPTION

Melody Modes

The CF1155 series melody mode is determined by the bonding options and levels on the mode control inputs
OSH and LH. When either OSH or LH or both go HIGH (V
shown in the following table.

OS H LH Melody mode

HIGH HIGH Level hold 1
LOW HIGH Level hold 2
HIGH LOW One-shot
LO W LO W Non-play

Level hold 1

), the corresponding melody mode is selected as

DD

When both OSH and LH go HIGH, melody play starts and continues while both are held HIGH. When both
inputs go open circuit or LOW, melody play stops, even if during mid melody.

Note that both OSH and LH inputs should be switched simultaneously using a single switch. If there is timing
difference between the two inputs, then LH has priority.

OSH

LH

OUT

1 TUNE

Oscillator

Pull-down resistance

(2-pin parallel resistance)

REPEAT REPEAT

500kΩ135kΩ 135kΩ

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