
2
ExarCorporation48720KatoRoad,FremontCA,9453850-668-707www.exar.comSP508_00_02709
T
A=0°Cto+70°CandVCC = +4.75V to +5.25V unless otherwise noted. The  denotes the specifications which applies to full tempera-
ture range of -40°C to =+85°C, unless otherwise specified.
PARAMETER
MIN. TYP. MAX. UNITS
 CONDITIONS
LOGICINPUTS
 V
IL
0.8
Volts
 V
IH
2.0
Volts
LOGICOUTPUTS
 V
OL
0.4
Volts
 I
OUT=–3.2mA
 V
OH
2.4
Volts
 I
OUT=.0mA
V.28DRIVER
DCParameters
Outputs
 OpenCircuitVoltage
±5
Volts
 perFigure
 LoadedVoltage
±5.0
±5
Volts
 perFigure2
 Short-CircuitCurrent
±00
mA
 perFigure4,V
OUT=0V
Power-Off Impedance
300
 perFigure5
AC Parameters
V
CC=+5VforACparameters
Outputs
 TransitionTime
.5
s
 perFigure6;+3Vto-3V
 InstantaneousSlewRate
30
V/s
perFigure3
 PropagationDelay
 t
PHL
0.5
5
s
 t
PLH
0.5
5
s
 Max.TransmissionRate
20
230
kbps
V.28RECEIVER
DCParameters
Inputs
Input Impedance
3
7
k
 perFigure7
 Open-CircuitBias
+2.0
Volts
 perFigure8
 HIGHThreshold
.7
3.0
Volts
 LOWThreshold
0.8
.2
Volts
ACParameters
V
CC=+5VforACparameters
PropagationDelay
 t
PHL
50
00
500
ns
 t
PLH
50
00
500
ns
ABSOLUTEMAXIMUMRATINGS
Thesearestressratingsonlyandfunctionaloperationofthe
deviceattheseratingsoranyotherabovethoseindicatedin
the operation sections of the specifications below is not implied.
Exposuretoabsolutemaximumratingconditionsforextended
periodsoftimemayaffectreliability.
V
CC.................................................................................................+7V
InputVoltages:
Logic................................................ -0.3Vto(V
CC+0.5V)
Drivers.............................................. -0.3Vto(V
CC+0.5V)
Receivers.............................................................±5.5V
OutputVoltages:
Logic................................................ -0.3Vto(V
CC+0.5V)
Drivers.....................................................................±2V
Receivers......................................... -0.3Vto(V
CC+0.5V)
StorageTemperature..................................................-65°Cto+50°C
PowerDissipation...................................................................520mW
(derate9.0mW/°Cabove+70°C)
PackageDerating:
JA...................................................................52.7°C/W
JC.....................................................................6.5°C/W
STORAGECONSIDERATIONS
Due to the relatively large package size, storage in a low
humidityenvironmentispreferred.Largehighdensityplastic
packagesaremoisturesensitiveandshouldbestoredinDry
VaporBarrierBags.Priortousage,thepartsshouldremain
baggedandstoredbelow40°Cand60%RH.Ifthepartsare
removedfromthebag,theyshouldbeusedwithin48hours
orstoredinanenvironmentatorbelow20%RH.Iftheabove
conditions cannot be followed, the parts should be baked
forfourhoursat25°Cinordertoremovemoisturepriorto
soldering.Exarshipsthe00-pinLQFPinDryVaporBarrier
Bagswithahumidityindicatorcardanddesiccantpack.The
humidityindicatorshouldbebelow30%RH.
ELECTRICALSPECIFICATIONS