DM114

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.007

Page 7

DM114

CHARACTERISTIC

SYMBOL

CONDITION

MIN.

TYP.

MAX.

UNIT

ENABLE-OUTn

⎯

40

80

Propagation

Delay Time

(“L” to “H”) CLK-SOUT

⎯

16

20

ns

ENABLE-OUTn

⎯

70

140

Propagation

Delay Time

(“H” to “L”) CLK-SOUT

⎯

16

20

ns

Output Current Rise Time

⎯

250

400

ns

Output Current Fall Time

VDD=5.0V

VIH=VDD

VIL=GND

REXT=210

Ω

VL=5.0V

RL=47

Ω

CL=15pF

⎯

30

50

ns

DM115

CHARACTERISTIC

SYMBOL

CONDITION

MIN.

TYP.

MAX.

UNIT

ENABLE-OUTn

⎯

40

80

Propagation

Delay Time

(“L” to “H”) CLK-SOUT

⎯

16

20

ns

ENABLE-OUTn

⎯

70

140

Propagation

Delay Time

(“H” to “L”) CLK-SOUT

⎯

16

20

ns

Output Current Rise Time

⎯

10

15

ns

Output Current Fall Time

VDD=5.0V

VIH=VDD

VIL=GND

REXT=630

Ω

VL=5.0V

RL=150

Ω

CL=15pF

⎯

30

50

ns

Note: (Delay between outputs)

The DM114、DM115 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.