1618

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

2 of 5

www.unisonic.com.tw

QW-R502-007.H



PIN CONFIGURATION

1

2

3

4

5

6

7

8

GND

S1

S2

S6

S4

S5

S3

VDD

16

15

14

13

12

11

10

9

INI

NC

BZ1

BZ2

OSC1

OSC2

NC

NC



PIN DESCRIPTIONS

PIN No.

PIN NAME

I/O

DESCRIPTION

1

VDD

-

Power supply pin (+).

2

S3

I

Sound selection keys. These keys connect with internal pull-down resistors. The

sound output will be enabled when a key is connected to VDD. On other hands,

the sound output will be disabled if a key is N.C. or connected to GND.

When two or more keys are selected in the same time, the sound will be

generated in cycling sequence. According to the priority of the keys, the proirity of

S1~S6 list below : S1>S2>S6>S4>S5>S3.

3

S5

I

4

S4

I

5

S6

I

6

S2

I

7

S1

I

8

GND

-

Power supply pin (-).

9

INI

I

An internal pull-up resistor. Might disable BZ1, BZ2, when connected to GND.

10

NC

-

No connecting.

11

BZ1

O

Audio output pins.

12

BZ2

O

13

OSC1

O

Oscillator pin with external resistor.

14

OSC2

I

15

NC

-

No connecting.

16

NC

O

No connecting.