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SP1485EMN-L/TR

P1-P3P4-P6P7-P8
1
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP1481E-1485E_103_052413
■ +5VOnly
■ LowPowerBiCMOS
■ Driver/ReceiverEnableforMulti-Drop
congurations
■ LowPowerShutdownMode
(SP1481E)
■ EnhancedESDSpecications:
DESCRIPTION
The SP1481E and the SP1485E are a family of half-duplex transceivers that meet the
specicationsofRS-485andRS-422serialprotocolswithenhancedESDperformance.The
ESDtolerancehasbeenimprovedonthesedevicestoover+15KVforbothHumanBody
ModelandIEC61000-4-2AirDischargeMethod.Thesedevicesarepin-to-pincompatible
withExar'sSP481andSP485devicesaswellaspopularindustrystandards.Aswiththe
originalversions,theSP1481EandtheSP1485EfeatureExar'sBiCMOSdesignallowing
lowpoweroperationwithoutsacricingperformance.TheSP1481EandSP1485Emeetthe
requirementsoftheRS-485andRS-422protocolsupto20Mbpsunderload.TheSP1481E
isequippedwithalowpowerShutdownmode.
+15KVHumanBodyModel
+15KVIEC61000-4-2AirDischarge
NowAvailableinLeadFreePackaging
SP1481E/SP1485E
Enhanced Low Power Half-Duplex
RS-485 Transceivers
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP1481E-1485E_103_052413
2
ABSOLUTE MAXIMUM RATINGS
Thesearestressratingsonlyandfunctionaloperationofthedeviceat
theseratingsoranyotherabovethoseindicatedintheoperationsections
ofthespecicationsbelowisnotimplied.Exposuretoabsolutemaximum
ratingconditionsforextendedperiodsoftimemayaffectreliability.
V
CC
..............................................................................+7V
InputVoltages
Logic...................................................-0.3Vto(V
CC
+0.5V)
Drivers................................................-0.3Vto(V
CC
+0.5V)
Receivers.................................................................±15V
ELECTRICAL CHARACTERISTICS
T
MIN
to T
MAX
andV
CC
=5V±5%unlessotherwisenoted.
PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS
SP1481E/SP1485E DRIVER
DC Characteristics
DifferentialOutputVoltage 3.5 V
CC
Volts Unloaded;R=∞;seeFigure1
DifferentialOutputVoltage 2 V
CC
Volts withload;R=50Ω;(RS-422);
seeFigure1
DifferentialOutputVoltage 1.5 V
CC
Volts withload;R=27Ω;(RS-485);seeFigure1
ChangeinMagnitudeofDriver
DifferentialOutputVoltagefor
ComplimentaryStates 0.2 Volts R=27ΩorR=50Ω;seeFigure1
DriverCommon-Mode
OutputVoltage 3 Volts R=27ΩorR=50Ω;seeFigure1
InputHighVoltage 2.0 Volts AppliestoDE,DI,RE
InputLowVoltage 0.8 Volts AppliestoDE,DI,RE
InputCurrent ±10 μA AppliestoDE,DI,RE
DriverShort-CircuitCurrent
V
OUT
=HIGH ±250 mA -7V≤V
O
≤+12V
V
OUT
=LOW
±250 mA -7V≤V
O
≤+12V
SP1481E/SP1485E DRIVER
AC Characteristics
MaximumDataRate 20 Mbps RE=5V,DE=5V;R
DIFF
=54Ω,
C
L1
= C
L2
= 100pF
DriverInputtoOutput 20 30 ns t
PLH
;R
DIFF
=54Ω,C
L1
= C
L2
=100pF;
seeFigures3and5
DriverInputtoOutput 20 40 ns t
PLH
;R
DIFF
=54Ω,C
LI
= C
L2
=100pF;
(SP1485EMNONLY) SeeFigures3and5
DriverInputtoOutput 20 30 ns t
PHL
;R
DIFF
=54Ω,C
L1
= C
L2
=100pF;
seeFigures3and5
DriverInputtoOutput 20 40 ns t
PHL
;R
DIFF
=54Ω,C
L1
= C
L2
=100pF;
(SP1485EMNONLY) seeFigures3and5
DriverSkew 3 5 ns seeFigures3and5,
t
SKEW
= | t
PLH
- t
PHL
|
DriverRiseorFallTime 8 20 ns From10%to90%;R
DIFF
=54Ω,
C
L1
= C
L2
=100pF;s
eeFigures3&
6
DriverEnabletoOutputHigh 40 70 ns C
L
=100pF;seeFigures4&6;S
2
closed
DriverEnabletoOutputLow 40 70 ns C
L
=100pF;seeFigures4&6;S
1
closed
DriverDisableTimefromLow 40 70 ns C
L
=100pF;seeFigures4&6;S
1
closed
DriverDisableTimefromHigh 40 70 ns C
L
=100pF;seeFigures4&6;S
2
closed
OutputVoltages
Logic.............................................-0.3Vto(V
CC
+0.5V)
Drivers................................................................±15V
Receivers......................................-0.3Vto(V
CC
+0.5V)
StorageTemperature.....................................................-65˚Cto+150˚C
PowerDissipationperPackage
8-pinNSOIC(derate6.60mW/
o
Cabove+70
o
C).........................550mW
3
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP1481E-1485E_103_052413
SPECIFICATIONS (continued)
PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS
SP1481E/SP148
5E RECEIVER
DC Characteristics
DifferentialInputThreshold -0.2 +0.2 Volts -7V≤V
CM
≤+12V
DifferentialInputThreshold -0.4 +0.4 Volts -7V≤V
CM
≤+12V
(SP1485EMNONLY)
InputHysteresis 20 mV V
CM
=0V
OutputVoltageHigh 3.5 Volts I
O
=-4mA,V
ID
=+200mV
OutputVoltageLow 0.4 Volts I
O
=+4mA,V
ID
=-200mV
Three-State(HighImpedance)
OutputCurrent ±1 µA 0.4V≤V
O
≤2.4V;RE=5V
InputResistance 12 15 kΩ -7V≤V
CM
≤+12V
InputCurrent(A,B);V
IN
=12V +1.0 mA DE=0V,V
CC
=0Vor5.25V,V
IN
=12V
InputCurrent(A,B);V
IN
=-7V -0.8 mA DE=0V,V
CC
=0Vor5.25V,V
IN
=-7V
Short-CircuitCurrent7 95 mA 0V≤V
O
≤V
CC
SP1481E/SP1485E RECEIVER
AC Characteristics
MaximumDataRate 20 Mbps RE=0V,DE=0V
ReceiverInputtoOutput 25 70 ns t
PLH
;R
DIFF
=54Ω,
C
L1
= C
L2
=
100pF;Figures3&7
ReceiverInputtoOutput 25 70 ns t
PHL
;R
DIFF
=54Ω,
C
L1
= C
L2
=
100pF;Figures3&7
Diff.ReceiverSkewIt
PLH
-t
PHL
I 5 10 ns R
DIFF
=54Ω;C
L1
= C
L2
=100pF;
Figures3&7
ReceiverEnableto
OutputLow 45 70 ns C
RL
=15pF;Figures2&8;S
1
closed
ReceiverEnableto
OutputHigh 45 70 ns C
RL
=15pF;Figures2&8;S
2
closed
ReceiverDisablefromLow 45 70 ns C
RL
=15pF;Figures2&8;S
1
closed
ReceiverDisablefromHigh45 70 ns C
RL
=15pF;Figures2&8;S
2
closed
SP1481E
Shutdown Timing
TimetoShutdown 50 200 600 ns RE=5V,DE=0V
DriverEnablefromShutdown
toOutputHigh 40 100 ns C
L
=100pF;SeeFigures4&6;S
2
closed
DriverEnablefromShutdown
toOutputLow 40 100 ns C
L
=100pF;SeeFigures4&6;S
1
closed
ReceiverEnablefrom
ShutdowntoOutputHigh 300 1000 ns C
L
=15pF;SeeFigures2&8;S
2
closed
ReceiverEnablefrom
ShutdowntoOutputLow 300 1000 ns C
L
=15pF;SeeFigures2&8;S
1
closed
POWER REQUIREMENTS
SupplyVoltage +4.75 +5.25 Volts
SupplyCurrent
SP1481E/1485E
NoLoad 900 μA RE,DI=0VorV
CC
;DE=V
CC
600 μA RE=0V,DI=0Vor5V;DE=0V
SP1481E
ShutdownMode 10 μA DE=0V,RE=V
CC
ENVIRONMENTAL AND MECHANICAL
OperatingTemperature
Commercial(_C_) 0 +70 °C
Industrial(_E_) -40 +85 °C
(_M_) -40 +125 °C
StorageTemperature -65 +150 °C
Package
NSOIC(_N)
T
MIN
to T
MAX
andV
CC
=5V±5%unlessotherwisenoted
P1-P3P4-P6P7-P8

SP1485EMN-L/TR

Mfr. #:
Buy SP1485EMN-L/TR
Manufacturer:
MaxLinear
Description:
RS-485 Interface IC 20MBPS HALF-DUPLEX RS-485 -40-125C
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

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