HOLT HI-1568PST, HI-1568PSI, HI-1568CDT, HI-1568CDM-03, HI-1568CDM Datasheet

March2001

HI-1567,HI-1568

DESCRIPTION

TheHI-1567andHI-1568arelowpowerCMOSdual
transceiversdesignedtomeettherequirementsof
MIL-STD-1553/1760specifications.

Thetransmittersectionofeachchanneltakes
complimentaryCMOS/TTLdigitalinputdataandconverts
ittobi-phaseManchesterencoded1553signalssuitable
fordrivingthebusisolationtransformer.Separate
transmitterinhibitcontrolsignalsareprovidedforeach
transmitter.

Thereceiversectionoftheeachchannelconvertsthe1553
busbi-phasedatatocomplimentaryCMOS/TTLdata
suitableforinputtingtoaManchesterdecoder.Each
receiver hasaseparateenableinputwhichcanbeusedto
forcetheoutputofthereceivertoalogic0(HI-1567)or
logic1(HI-1568).

Tominimizethepackagesizeforthisfunction,the
transmitteroutputsareinternallyconnectedtothereceiver
inputs,sothatonlytwopinsarerequiredforconnectionto
eachcouplingtransformer.Fordesignsrequiring
independentaccesstotransmitterandreceiver1553
signals,pleasecontactyourHoltSalesrepresentative.

PINCONFIGURATIONS

VDDA1
BUSA2

3

BUSA

RXENA4

GNDA5

VDDB6
BUSB7

8

BUSB

RXENB9

GNDB10

20PinCeramicDIPpackage

20

TXA
19TXA
18TXINHA
17RXA
16

RXA
15

TXB
14TXB
13TXINHB
12RXB
11

RXB

FEATURES

!

ComplianttoMIL-STD-1553A&B,
MIL-STD-1760

!

CMOStechnologyforlowstandbypower

!

Smallestfootprintavailablein20pinplastic
ESOIC(thermallyenhancedSOIC)package

!

Lessthan1.0Wmaximumpowerdissipation

!

AvailableinDIP,Flatpackandsmalloutline
(ESOIC)packageoptions

!

Militaryprocessingoptions

!

Industrystandardpinconfigurations

VDDA
BUSA
BUSA

RXENA

GNDA

VDDB
BUSB
BUSB

RXENB

GNDB

1
2
3
4
5
6
7
8
9

10

20
19
18
17
16
15
14
13
12
11

TXA
TXA
TXINHA
RXA
RXA
TXB
TXB
TXINHB
RXB
RXB

20PinPlasticESOIC-WBpackage

HOLTINTEGRATEDCIRCUITS

(DS1567Rev.B)03/01

1

HI-1567,HI-1568

PINDESCRIPTIONS

PINSYMBOLFUNCTIONDESCRIPTION

1VDDApowersupply+5voltpowerforchannelA
2BUSAanalogoutputMIL-STD-1533busdriverA,positivesignal
3analogoutputMIL-STD-1553busdriverA,negativesignal
4RXENAdigitalinputReceiverAenable.Iflow,forcesRXAandlow(HI-1567)orHigh(HI-1568)
5GNDApowersupplyGroundforchannelA
6VDDB
7BUSB
8analogoutputMIL-STD-1553busdriverB,negativesignal

9RXENB
10GNDB
11
12RXBdigitaloutputReceiverBoutpot,non-invertedl
13TXINHBdigitalinputTransmitinhibit,channelB.IfhighBUSB,disabled
14TXBdigitalinputTransmitterBdigitaldatainput,non-inverted
15digitalinputTransmitterBdigitaldatainput,inverted
16 digitaloutput
17RXAdigitaloutputReceiverAoutput,non-inverted
18TXINHAdigitalinputTransmitinhibit,channelA.IfhighBUSA,disabled
19TXAdigitalinputTransmitterAdigitaldatainput,non-inverted
15digitalinputTransmitterAdigitaldatai nput,inverted

BUSA

BUSB

RXB

TXB
RXA

TXA

RXA

powersupply+5voltpowerforchannelB

analogoutputMIL-STD-1533busdriverB,positivesignal

digitalinputReceiverBenable.Iflow,forcesRXBandlow(HI-1567)orHigh(HI-1568)

powersupplyGroundforchannelB

digitaloutputReceiverBoutput,inverted

ReceiverAoutput,inverted

RXB

BUSB

BUSA

FUNCTIONALDESCRIPTION

TheHI-1567familyofdatabustransceiverscontaindiffer­entialvoltagesourcedriversanddifferentialreceivers.
TheyareintendedforapplicationsusingaMIL-STD-1553
A/Bdatabus.Thedeviceproducesatrapezoidaloutput
waveformduringtransmission.

TRANSMITTER

Datainputtothetransmittersectionofthesedevicesis
fromthecomplimentaryCMOS/TTLinputsTXA/Band

.Thisproducesanominal30Vpeaktopeaksignal

TXA/B
acrossa140ohmload.Thetransmitterisconnectedtothe
busviaa1:2.5transformerwhosesecondaryisconnected
totwo52ohmisolationresisterswhichfeedtheterminated
7 0ohmbus.Thiswillproduceanominalvoltageonthebus
of7.5voltspeaktopeak.

Thetransmitterisautomaticallyinhibitedandplacedinthe
highimpedancestatewhenbothTXA/Bandareei-

TXA/B
theratalogic“1”orlogic“0”simultaneously.Alogic“1:”ap­pliedtotheTXINHA/Binputwillforcethetransmittertothe
highimpedancestate,regardlessofthestateofTXA/Band
TXA/B

RECEIVER

Thereceiveristransformercoupledtothebusbya1:1
transformer.Itsdifferentialinputstagedrivesafilterand
thresholdcomparator.CMOS/TTLdataisoutputtedatthe
RXA/Bandpins.RXA/B

Thereceiveroutputscanbothbeforcedtoalogic"0"
(HI-1567)orlogic“1”(HI-1568)bysettingRXENAor
RXENBlow.

HOLTINTEGRATEDCIRCUITS

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HI-1567,HI-1568

TXA/B

TXA/B

TXINHA/B

RXA/B

RXA/B

RXENA/B

EachChannel

TRANSMITTER

Transmit

Logic

RECEIVER

Receive

Logic

Slope

Control

Comparator

Figure1.BlockDiagram

Input
Filter

BUSA/B

BUSA/B

Isolation
Transformer

DataBus

Coupler
Network

Director
Transformer

TXA/B

TXA/B

BUSA/B- BUSA/B

Vin

(LinetoLine)

RXA/B

RXA/B

HOLTINTEGRATEDCIRCUITS

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