DM115B

點晶科技股份有限公司

SILICON TOUCH TECHNOLOGY INC.

8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage

Version:A.001

Page 7

CHARACTERISTIC

SYMBOL

CONDITION

MIN.

TYP.

MAX.

UNIT

ENABLE-OUT0

⎯

66

132

Propagation

Delay Time

(“L” to “H”) CLK-SOUT

⎯

16

20

ns

ENABLE-OUT0

⎯

81

162

Propagation

Delay Time

(“H” to “L”) CLK-SOUT

⎯

16

20

ns

Output Current Rise Time

⎯

30

60

ns

Output Current Fall Time

VDD=5.0V

VIH=VDD

VIL=GND

REXT=630

Ω

VL=5.0V

RL=150

Ω

CL=15pF

⎯

32

50

ns

Note: (Delay between outputs)

The DM115B also incorporated the delay unit between outputs. The delay time is 4 ns(typ.), out7 has no delay,

out5 has 4 ns delay, out 3 has 8 ns delay, and then out 1, out 0, out 2, out 4, out6. The delay is to prevent large current

impulse.