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