HCPL-3700 AC/DC to Logic Interface Optocoupler

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HCPL-3700 AC/DC to Logic Interface Optocoupler

April 2007

HCPL-3700 AC/DC to Logic Interface Optocoupler
Features
AC or DC input Programmable sense voltage Logic level compatibility Threshold guaranteed over temperature (0 C to 70 C) OptoplanarTM construction for high common mode

tm

Description
The HCPL-3700 voltage/current threshold detection optocoupler consists of an AlGaAs LED connected to a threshold sensing input buffer IC which are optically coupled to a high gain darlington output. The input buffer chip is capable of controlling threshold levels over a wide range of input voltages with a single resistor. The output is TTL and CMOS compatible.

immunity
UL recognized (file E90700) VDE certified ordering option V , e.g., HCPL3700V

Applications
Low voltage detection 5 V to 240 V AC/DC voltage sensing Relay contact monitor Current sensing Microprocessor Interface Industrial controls

Schematic

Package

AC DC DCAC

1 2 3 4

8 7 6 5

VCC

8
NC

1
VO GND

8 1

8 1

TRUTH TABLE (Positive Logic) Input
H L

Output
L H

AC/DC POWER

RX HCPL-3700 LOGIC

A 0.1 F bypass capacitor must be connected between pins 8 and 5.

GND 1

GND 2

2005 Fairchild Semiconductor Corporation HCPL-3700 Rev. 1.0.1

www.fairchildsemi.com

HCPL-3700 Datasheet Fairchild Download PDF

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HCPL-3700 DATASHEET