![](/html/Fairchild/387510/page6.png)
AC/DC TO LOGIC INTERFACE
OPTOCOUPLER
HCPL-3700
Fig. 7 Logic High Supply Current
vs. Temperature
1000
VCC = 18 V
VO = OPEN
IIN = 0 mA
100
10
1
-60 -40 -20
0
20
40
60
TA - TEMPERATURE (°C)
80
100
Fig. 8 External Threshold Characteristics V+/V- vs. Rx
300
V+ (AC)
250
V- (AC)
200
V+ (DC)
150
100
V- (DC)
50
0
0
40
80
120
160
200
240
RX - EXTERNAL SERIES RESISTOR (KΩ)
© 2003 Fairchild Semiconductor Corporation
Page 6 of 11
11/8/04