DM134B

點晶科技股份有限公司

SILICON TOUCH TECHNOLOGY INC.

16-Bit Constant Current LED Drivers

-3-

Version

：A.006

Block Diagram

Timing Diagram

(Note) Latches are level sensitive (not edge triggered).

LATCH-terminal = H level, latches become transparent; LATCH-terminal = L level, latches hold data.

ENABLE-terminal = H level, all outputs (OUT0~15) are off.

An external resistor is connected between R-EXT and GND for setting up the value of constant current.

SERIAL-OUT changes state on the rising edges of clock.

CLOCK

SERIAL_IN

LATCH

ENABLE

OUT0

OUT1

OUT2

OUT3

OUT13

OUT14

OUT15

5V

0V

5V

0V

5V

0V

5V

0V

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

5V

0V

SERIAL_OUT

Previous Data

16 Clocks

CK

CK

CK

D

D

D

Q

Q

Q

D

ST

Q

CLOCK

I-REG.

SERIAL-IN

LATCH

R-EXT

SERIAL-OUT

OUT15

OUT1

OUT0

D

ST

ST

Q

Q

D

ENABLE