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DM114
、DM115
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.002
Page 7
Preliminary
Switching Characteristics (Ta = 25 °C unless otherwise noted)
DM114
CHARACTERISTIC
SYMBOL
CONDITION
MIN.
TYP.
MAX.
UNIT
ENABLE-OUTn
⎯
40
80
Propagation
Delay Time
(“L” to “H”) CLK-SOUT
tpLH
⎯
16
20
ns
ENABLE-OUTn
⎯
70
140
Propagation
Delay Time
(“H” to “L”) CLK-SOUT
tpHL
⎯
16
20
ns
Output Current Rise Time
tor
⎯
250
400
ns
Output Current Fall Time
tof
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
tpLH
⎯
16
20
ns
ENABLE-OUTn
⎯
70
140
Propagation
Delay Time
(“H” to “L”) CLK-SOUT
tpHL
⎯
16
20
ns
Output Current Rise Time
tor
⎯
10
15
ns
Output Current Fall Time
tof
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.