Broadcom

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Description

These devices are single-channel, hermetically sealed,

voltage/current threshold detection optocouplers. The

products are capable of operation and storage over the full

military temperature range and can be purchased as either

commercial product, or with full MIL-PRF-38534 Class Level H

or K testing, or from the DLA Standard Microcircuit Drawing

(SMD) 5962-89477. All devices are manufactured and tested on

a MIL-PRF-38534 certified line, and Class H and K devices are

included in the DLA Qualified Manufacturers List, QML-38534

for Hybrid Microcircuits.

Each unit contains a light emitting diode (LED), a threshold

sensing input buffer IC, and a high gain photon detector to

provide an optocoupler that permits adjustable external

threshold levels. The input buffer circuit has a nominal turn on

one or more external attenuation resistors permits the use of

this device over a wide range of input voltages and currents.

Threshold sensing prior to the LED and detector elements

minimizes effects of any variation in optical coupling.

Hysteresis is also provided in the buffer for extra noise

immunity and switching stability.

The buffer circuit is designed with internal clamping diodes to

protect the circuitry and LED from a wide range of overvoltage

and overcurrent transients while the diode bridge enables easy

use with ac voltage input.

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.

See Selection Guide — Package Styles and Lead Configuration Options

for available extensions.

Features



Dual marked with device part number and DLA Standard

Microcircuit Drawing (SMD)



Manufactured and tested on a MIL-PRF-38534 certified line



QML-38534, Class H and K



Hermetically sealed 8-pin dual in-line packages



Performance guaranteed over –55°C to +125°C



AC or DC input



Programmable sense voltage



Hysteresis



HCPL-3700 operating compatibility



Logic compatible output



1500 Vdc withstand test voltage



Thresholds guaranteed over temperature



Thresholds independent of LED characteristics

Applications



Military and space



High reliability systems



Transportation, medical, and life critical systems



Limit switch sensing



Low voltage detector



AC/DC voltage sensing



Relay contact monitor



Relay coil voltage monitor



Current sensing



Microprocessor interface



Telephone ring detection



Harsh industrial environments

AC/DC to Logic Interface Hermetically Sealed

Optocouplers

Data Sheet