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ELECTRICAL CHARACTERISTICS:
( All voltages referenced to Vss. TA = +25˚C unless otherwise specified.)
PARAMETER
Supply Voltage
Supply Current
SYMBOL
MIN
VDD
+6
IDD
-
TYP
-
-
MAX
+9.5
1.5
TRIG Sink Current
IO
-50
-
-
Vo = VDD - V
TRIG Source Current
IO
+0.1
-
-
Vo = VDD - 0.2V
TRIG Pulse Width
TW
-
90
-
-
-
110
-
TRIG Pulse Delay
Td
-
4.0
-
(Medium Brightness)
-
4.8
-
CLOCK Resistor
RC
-
300
-
-
-
360
-
CONTROL Resistor
-
Capacitor
-
-
10
-
-
1
-
Touch Plate Capacitance
CL
-
-
600
UNIT
V
mA
mA
CONDITIONS
-
Output off,
VDD = +8.0V
VDD = +8.0V
mA
VDD = +8.0V
µs
RC = 300kΩ, 60Hz
µs
RC = 360kΩ, 50Hz
ms
Rc = 300kΩ, 60Hz
ms
Rc = 360kΩ, 50Hz
kΩ
60Hz
kΩ
50Hz
MΩ
-
µF
-
pF
-
MODE 6
SYNC 2
ZERO-CROSS
DETECTOR
CLOCK 1
OSCILLATOR
COUNTER
DECODER
OUTPUT
DRIVER
8 TRIG
TOUCH 4
AGC CIRCUIT
STEPPER
CONTROL 5
V DD 3
+V
V SS 7
-V
FIGURE 3
LS7538/LS7539 BLOCK DIAGRAM
7538/39-041197-3