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LS7538 Datasheet(PDF) 3 Page - LSI Computer Systems

Part No. LS7538
Description  TOUCH CONTROL STEP DIMMER LIGHT SWITCH WITH AUTOMATIC GAIN CONTROL (AGC)
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Maker  LSI [LSI Computer Systems]
Homepage  http://www.lsicsi.com
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LS7538 Datasheet(HTML) 3 Page - LSI Computer Systems

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


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