H
AC/DC to Logic Interface
Optocouplers
Technical Data
HCPL-3700
HCPL-3760
Features
• Standard (HCPL-3700) and
Low Input Current
(HCPL-3760) Versions
• AC or DC Input
• Programmable Sense Voltage
• Hysteresis
• Logic Compatible Output
• Thresholds Guaranteed over
Temperature
• Thresholds Independent of
LED Optical Parameters
• Recognized under UL 1577
and CSA Approved for
Dielectric Withstand Proof
Test Voltage of 2500 Vac, 1
Minute
Description
The HCPL-3700 and HCPL-3760
are voltage/current threshold
detection optocouplers. The
HCPL-3760 is a low-current
version of the HCPL-3700. To
obtain lower current operation,
the HCPL-3760 uses a high-
efficiency AlGaAs LED which
provides higher light output at
lower drive currents. Both
devices utilize threshold sensing
input buffer ICs which permit
control of threshold levels over a
wide range of input voltages with
a single external resistor.
The input buffer incorporates
several features: hysteresis for
extra noise immunity and
switching immunity, a diode
bridge for easy use with ac input
signals, and internal clamping
Functional Diagram
AC 1
Applications
• Limit Switch Sensing
• Low Voltage Detector
• 5 V-240 V AC/DC Voltage
Sensing
• Relay Contact Monitor
• Relay Coil Voltage Monitor
• Current Sensing
• Microprocessor Interfacing
8
V
CC
DC+ 2
7
NC
DC- 3
6
V
O
AC 4
5
GND
TRUTH TABLE
(POSITIVE LOGIC)
INPUT OUTPUT
H
L
L
H
CAUTION: It is advised that normal static precautions be taken in handling and assembly of this component to
prevent damage and/or degradation which may be induced by ESD.
1-348
5965-3582E
diodes to protect the buffer and
LED from a wide range of over-
voltage and over-current
transients. Because threshold
sensing is done prior to driving
the LED, variations in optical
coupling from the LED to the
detector will have no effect on the
threshold levels.
The HCPL-3700's input buffer IC
has a nominal turn on threshold
of 2.5 mA (I
TH
+) and 3.7 volts
(V
TH
+).
The buffer IC for the HCPL-3760
was redesigned to permit a lower
input current. The nominal turn
on threshold for the HCPL-3760
is 1.2 mA (I
TH
+) and 3.7 volts
(V
TH
+).
The high gain output stage
features an open collector output
providing both TTL compatible
saturation voltages and CMOS
compatible breakdown voltages.
By combining several unique
functions in a single package, the
user is provided with an ideal
component for industrial control
computer input boards and other
applications where a predeter-
mined input threshold level is
desirable.
Ordering Information
Specify Part Number followed by Option Number (if desired)
Example
HCPL-3700#XXX
300 = Gull Wing Surface Mount Option
500 = Tape/Reel Package Option (1 K min.)
Option data sheets available. Contact your Hewlett-Packard sales representative or authorized distributor for
information.
Schematic
1-349
Package Outline Drawings
Standard DIP Package
9.40 (0.370)
9.90 (0.390)
8
7
6
5
TYPE NUMBER
HP XXXX
YYWW RU
PIN ONE
1.19 (0.047) MAX.
1
2
3
4
UL
RECOGNITION
DATE CODE
6.10 (0.240)
6.60 (0.260)
7.36 (0.290)
7.88 (0.310)
0.20 (0.008)
0.33 (0.013)
5° TYP.
1.78 (0.070) MAX.
4.70 (0.185) MAX.
1
2
AC
DC+
DC-
AC
V
CC
8
NC 7
V
O
6
GND 5
0.51 (0.020) MIN.
2.92 (0.115) MIN.
3
4
0.76 (0.030)
1.40 (0.056)
0.65 (0.025) MAX.
2.28 (0.090)
2.80 (0.110)
DIMENSIONS IN MILLIMETERS AND (INCHES).
Gull Wing Surface Mount Option 300
PAD LOCATION (FOR REFERENCE ONLY)
9.65 ± 0.25
(0.380 ± 0.010)
8
7
6
5
1.016 (0.040)
1.194 (0.047)
TYPE NUMBER
DATE CODE
4.826 TYP.
(0.190)
HP XXXX
YYWW RU
6.350 ± 0.25
(0.250 ± 0.010)
9.398 (0.370)
9.906 (0.390)
MOLDED
1
2
3
4
UL
RECOGNITION
1.194 (0.047)
1.778 (0.070)
9.65 ± 0.25
(0.380 ± 0.010)
7.62 ± 0.25
(0.300 ± 0.010)
0.381 (0.015)
0.635 (0.025)
1.19
(0.047)
MAX.
1.780
(0.070)
MAX.
4.19 MAX.
(0.165)
0.20 (0.008)
0.33 (0.013)
1.080 ± 0.320
(0.043 ± 0.013)
2.540
(0.100)
BSC
0.635 ± 0.130
(0.025 ± 0.005)
0.635 ± 0.25
(0.025 ± 0.010)
12° NOM.
DIMENSIONS IN MILLIMETERS (INCHES).
TOLERANCES (UNLESS OTHERWISE SPECIFIED): xx.xx = 0.01
xx.xxx = 0.005
LEAD COPLANARITY
MAXIMUM: 0.102 (0.004)
1-350
Maximum Solder Reflow Thermal Profile
260
240
220
200
180
160
140
120
100
80
60
40
20
0
0
1
∆T
= 145°C, 1°C/SEC
∆T
= 115°C, 0.3°C/SEC
TEMPERATURE – °C
∆T
= 100°C, 1.5°C/SEC
2
3
4
5
6
7
8
9
10
11
12
TIME – MINUTES
(NOTE: USE OF NON-CHLORINE ACTIVATED FLUXES IS RECOMMENDED.)
Regulatory Information
The HCPL-3700/60 has been
approved by the following
organizations:
UL
Recognized under UL 1577,
component recognition program,
File E55361.
CSA
Approved under CSA Component
Acceptance Notice #5, File CA
88324.
1-351
Insulation and Safety Related Specifications
Parameter
Min. External Air Gap
(External Clearance)
Min. External Tracking
Path (External Creepage)
Min. Internal Plastic
Gap (Internal Clearance)
Tracking Resistance
(Comparative
Tracking Index)
Isolation Group
CTI
Symbol Value Units
L(IO1)
L(IO2)
7.1
7.4
0.08
mm
mm
mm
Conditions
Measured from input terminals to output terminals,
shortest distance through air
Measured from input terminals to output terminals,
shortest distance path along body
Through insulation distance, conductor to conductor,
usually the direct distance between the photoemitter
and photodetector inside the optocoupler cavity
DIN IEC 112/VDE 0303 PART 1
200
V
IIIa
Material Group (DIN VDE 0110, 1/89, Table 1)
Option 300 – surface mount classification is Class A in accordance with CECC 00802.
Absolute Maximum Ratings
(No derating required up to 70°C)
Parameter
Storage Temperature
Operating Temperature
Lead Soldering Cycle
Temperature
Time
Input Current
Average
Surge
Transient
Input Voltage (Pins 2-3)
Input Power Dissipation
Total Package Power Dissipation
Output Power Dissipation
Output Current
Average
Supply Voltage (Pins 8-5)
Output Voltage (Pins 6-5)
Solder Reflow Temperature Profile
Symbol
T
S
T
A
Min.
-55
-40
Max.
125
85
260
10
50
140
500
Units
°C
°C
°C
s
mA
Note
1
2
2, 3
I
IN
V
IN
P
IN
P
T
P
O
I
O
V
CC
V
O
-0.5
V
230
mW
305
mW
210
mW
30
mA
-0.5
20
V
-0.5
20
V
See Package Outline Drawings section
4
5
6
7
Recommended Operating Conditions
Parameter
Supply Voltage
Operating Temperature
Operating Frequency
Symbol
V
CC
T
A
f
Min.
2
0
0
Max.
18
70
4
Units
V
°C
kHz
8
Note
1-352
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