HP HCPL-3760, HCPL-3700 Datasheet

1-348

H

AC/DC to Logic Interface
Optocouplers

Technical Data

HCPL-3700
HCPL-3760

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 high­efficiency 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.

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

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

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.

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

1

2

3

4

8

7

6

5

AC

DC+

DC-

AC

V

CC

V

O

GND

TRUTH TABLE

(POSITIVE LOGIC)

INPUT

H
L

OUTPUT

L
H

NC

5965-3582E

1-349

diodes to protect the buffer and
LED from a wide range of over­voltage 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 (ITH +) and 3.7 volts
(VTH +).

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 (ITH +) and 3.7 volts
(VTH +).

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 predeter­mined 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

1-350

Package Outline Drawings

Standard DIP Package

Gull Wing Surface Mount Option 300

9.40 (0.370)

9.90 (0.390)

1.78 (0.070) MAX.

1.19 (0.047) MAX.

HP XXXX



YYWW

DATE CODE

0.76 (0.030)

1.40 (0.056)

2.28 (0.090)

2.80 (0.110)

0.51 (0.020) MIN.

0.65 (0.025) MAX.

4.70 (0.185) MAX.

2.92 (0.115) MIN.

DIMENSIONS IN MILLIMETERS AND (INCHES).

5678

4321

0.20 (0.008)

0.33 (0.013)

6.10 (0.240)

6.60 (0.260)
5° TYP.

7.36 (0.290)

7.88 (0.310)

1

2

3

4

8

7

6

5

AC

AC

DC+

DC-

GND

V

CC

NC

V

O

PIN ONE

TYPE NUMBER

UL
RECOGNITION

UR

0.635 ± 0.25

(0.025 ± 0.010)

12° NOM.

0.20 (0.008)

0.33 (0.013)

9.65 ± 0.25

(0.380 ± 0.010)

0.635 ± 0.130

(0.025 ± 0.005)

7.62 ± 0.25

(0.300 ± 0.010)

5

6

7

8

4

3

2

1

9.65 ± 0.25

(0.380 ± 0.010)

6.350 ± 0.25

(0.250 ± 0.010)

1.016 (0.040)

1.194 (0.047)

1.194 (0.047)

1.778 (0.070)

9.398 (0.370)

9.906 (0.390)

4.826

(0.190)



TYP.

0.381 (0.015)

0.635 (0.025)

PAD LOCATION (FOR REFERENCE ONLY)

1.080 ± 0.320

(0.043 ± 0.013)

4.19

(0.165)

MAX.

1.780

(0.070)

MAX.

1.19

(0.047)

MAX.

2.540

(0.100)

BSC

DIMENSIONS IN MILLIMETERS (INCHES).
TOLERANCES (UNLESS OTHERWISE SPECIFIED):

LEAD COPLANARITY 
MAXIMUM: 0.102 (0.004)

xx.xx = 0.01
xx.xxx = 0.005

HP XXXX



YYWW

DATE CODE

TYPE NUMBER

UL
RECOGNITION

UR

MOLDED

1-351

Maximum Solder Reflow Thermal Profile

240

∆T = 115°C, 0.3°C/SEC

0

∆T = 100°C, 1.5°C/SEC

∆T = 145°C, 1°C/SEC

TIME – MINUTES

TEMPERATURE – °C

220

200
180
160
140
120
100

80
60
40
20

0

260

123456789101112

(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.