iC-NT
LIGHT CHAIN PULSE DRIVER
Rev A0, Page 6/8
OPERATING REQUIREMENTS: Logic
Operating Conditions: VDD= 4.75..5.5V, Ta= 0..70°C, CL()= 50pF,
input levels lo= 0..0.45V, hi= VDD-0.45V..VDD, see Fig. 1 for reference levels and waveforms
Item Symbol
Parameter
Conditions
Fig.
Min.
I1
I2
I3
I4
I5
I6
t
en
t
set1
t
hold1
t
set2
t
hold2
t
w
Activation Time (standby to operation):
DIN lo→hi before CLK lo→hi
Setup time:
DIN stable before CLK lo→hi
Hold time:
DIN stable after CLK lo→hi
Setup time:
SHEN stable before CLK hi→lo
Hold time:
SHEN stable after CLK hi→lo
LED Pulse time:
1st to 2nd CLK lo→hi
4
2
2
2
2
4
5
50
50
50
50
1.0
Max.
µs
ns
ns
ns
ns
µs
Unit
Fig. 1: Reference levels
Fig. 2: Timing characteristics
Fig. 3: LED Current Pulse
Fig. 4: Chain configuration (SHEN= hi),
LED pulse definition by clock signal
ICHAUS [ IC-HAUS GMBH ]
