點晶科技股份有限公司

SILICON TOUCH TECHNOLOGY INC

.

新竹市科學園區展業一路9號7樓之1

9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.

Tel：886-3-5645656

Fax：886-3-5645626

16-channel 16-bit PWM Constant Current LED Driver

Version : A.003

Page 3

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DM634

Pin Connection

1

2

3

4

5

6

7

8

24

23

22

21

20

19

18

17

OUT0

OUT1

OUT2

OUT3

VCC

REXT

DAO

SOMODE/GCK

GND

DCK

LAT

OUT 15

OUT 14

OUT 13

OUT 12

DAI

SOP24

SSOP24

TSSOP24E

( top view )

9

10

11

12

16

15

14

13

OUT4

OUT5

OUT6

OUT7

OUT 11

OUT 10

OUT 9

OUT 8

Pin Description

PIN No.

PIN NAME

FUNCTION

SOP24/SSOP24/TSSOP24E: 1

TSSOP24E: exposed pad

GND

Ground terminal.

SOP24/SSOP24/TSSOP24E: 2

DAI

Serial data input terminal.

SOP24/SSOP24/TSSOP24E: 3

DCK

Synchronous clock input terminal for serial data

transfer. Data is sampled at the rising edge of DCK.

SOP24/SSOP24/TSSOP24E: 4

LAT

Input terminal of data strobe:

latch

(level trigger),

SOP24/SSOP24/TSSOP24E: 5~20

OUT0~15 Sink constant-current outputs (open-drain).

SOP24/SSOP24/TSSOP24E: 21

SOMODE

/GCK

Serial Out Mode Selection(SOMODE) :

falling edge of DCK,

rising edge of DCK.

Gray Scale Clock(GCK) : Input terminal for PWM

operation.

SOP24/SSOP24/TSSOP24E: 22

DAO

Serial data output terminal.

SOP24/SSOP24/TSSOP24E: 23

REXT

External resistors connected between REXT and

GND for output current value setting.

SOP24/SSOP24/TSSOP24E: 24

VCC

Supply voltage terminal.