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SP1491ECN-L/TR

P1-P3P4-P6P7-P8
1
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP1490_SP1491E_101_052413
■ +5VOnly
■ LowPowerBiCMOS
■ Driver/ReceiverEnable(SP1491E)
■ RS-485andRS-422Drivers/Receivers
■ PinCompatiblewithSN75179(SP1490E)
■ PinCompatiblewithSN75180(SP1491E)
■ ImprovedESDSpecications
±15kVHumanBodyModel
±15kVIEC61000-4-2AirDischarge
SP1490E SP1491E
DESCRIPTION
FEATURES
APPLICATIONS
■ IndustialNetworks■Telecom
■ MotorControl
TheSP1490Eisalowpowerdifferentiallinedriver/receivermeetingRS-485andRS-422standards
upto20Mbps.TheSP1491EisidenticaltotheSP1490Ewiththeadditionofdriverandreceivertri-
stateenablelines.Bothproductsfeature±200mVreceiverinputsensitivity,overwidecommonmode
range.TheSP1490Eisavailableinan8-pinNSOICpackagesforoperationoverthecommercialand
industrialtemperatureranges.TheSP1491Eisavailableina14-pinNSOICpackagesforoperation
overthecommercialandindustrialtemperatureranges.
BLOCK DIAGRAM
■ HVAC/BuildingControl
1
2
3
4
5
6
7
8
R
D
Vcc
GND
RO
DI
A
B
Z
Y
6
1
2
3
4
5
7
8
Vcc
GND
RO
DI
A
B
Z
Y
R
D
9
10
11
12
13
14
NC
RE B
DE
GND
NC
NC
SP1490E/SP1491E
Full Duplex RS-485 Transceivers
1
2
3
4 5
6
7
8
V
CC
8 Pin - nSOIC
DI
Y
RO B
A
Z
GND
SP1490E
8PinnSOIC
2
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP1490_SP1491E_101_052413
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
Drivers................................................-0.5Vto(V
CC
+0.5V)
Receivers..................................................................±14V
OutputVoltages
Drivers......................................................................±14V
Receivers...........................................-0.5Vto(V
CC
+0.5V)
StorageTemperature....................................................-65˚Cto+150˚
PowerDissipation.....................................................................1000mW
T
MIN
toT
MAX
andV
CC
=5V±5%unlessotherwisenoted.
PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS
SP1490E/1491E DRIVER
DC Characteristics
DifferentialOutputVoltage 3.5 V
CC
Volts Unloaded;R=∞ ;seegure1
DifferentialOutputVoltage 2 V
CC
Volts WithLoad;R=50Ω;(RS422);
seegure1
DifferentialOutputVoltage 1.5 V
CC
Volts WithLoad;R=27Ω;(RS485);see
gure1
ChangeinMagnitudeofDriver
DifferentialOutputVoltagefor
ComplimentaryStates 0.2 Volts R=27ΩorR=50Ω;seegure1
DriverCommon-Mode
OutputVoltage 3 Volts R=27ΩorR=50Ω;seegure1
InputHighVoltage 2.0 Volts AppliestoD
InputLowVoltage 0.8 Volts AppliestoD
InputCurrent ±10 μA AppliestoD
DriverShort-CircuitCurrent
V
OUT
=HIGH ±250 mA -7V≤V
O
≤+12V
V
OUT
=LOW ±250 mA -7V≤V
O
≤+12V
SP1490E/1491E DRIVER
AC Characteristics
MaximumDataRate 20 Mbps
DriverInputtoOutput 30 40 ns t
R/F
;R
DIFF
=54Ω,C
L1
= C
L2
=100pF;
seegures3and6
DriverInputtoOutput 30 40 ns t
R/F
;R
DIFF
=54Ω,C
L1
= C
L2
=100pF;
seegures3and6
DriverSkew 5 ns seegures3and6,
t
R/F
= | t
PLH
- t
PHL
|
DriverRiseorFallTime8 20 ns From10%to90%;R
DIFF
=54Ω,
SP1491E only C
L1
= C
L2
=100pF;seegures3and6
t
R/F
DriverEnabletoOutputHigh 20 70 ns C
L1
= C
L2
=100pF;seegures
4and7;S
2
closed
DriverEnabletoOutputLow 40 70 ns C
L1
= C
L2
=100pF;seegures
4and7;S
1
closed
DriverDisableTimefromLow 40 70 ns C
L1
= C
L2
=100pF;seegures
4and7;S
1
closed
DriverDisableTimefromHigh 40 70 ns C
L1
= C
L2
=100pF;seegures
4and7;S
2
closed
ELECTRICAL CHARACTERISTICS
3
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP1490_SP1491E_101_052413
SP1490E/1491E
RECEIVER
DC Characteristics
DifferentialInputThreshold 0.2 +0.2 Volts -7V≤V
CM
≤12V
InputHysteresis 70 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
InputResistance 12 15 kΩ -7V≤V
CM
≤12V(1unitload)
InputCurrent(A,B);V
IN
=12V ±1.0 mA V
IN
=12V
InputCurrent(A,B);V
IN
=-7V -0.8 mA V
IN
=-7V
Short-CircuitCurrent 85 mA 0V≤V
O
≤V
CC
PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS
SP1490E
/1491E
RECEIVER
AC Characteristics
MaximumDataRate 20 Mbps
ReceiverInputtoOutput 20 45 50 ns t
PLH
;R
DIFF
=54Ω,
C
L1
= C
L2
=
100pF;Figures3&8
C
L1
15pF
RO
A
B
A
B
DI
DE
3V
C
L2
R
DIFF
500
C
L
Output
Under
Test
S
1
S
2
V
CC
Figure 3. Driver/Receiver Timing Test Circuit Figure 4. Driver Timing Test Load #2 Circuit
A
B
R
R
V
OD
V
OC
Figure 1. Driver DC Test Load Circuit
Figure 2. Receiver Timing Test Load Circuit
ReceiverInputtoOutput 20 45 50 ns t
PHL
;R
DIFF
=54Ω,
C
L1
= C
L2
=
100pF;Figures3&8
Diff.ReceiverSkewIt
PLH
-t
PHL
I 5 10 ns R
DIFF
=54Ω;C
L1
= C
L2
=100pF;
ReceiverTplh/Tphl 40 70 ns
POWER REQUIREMENTS
SupplyVoltage +4.75 +5.25 Volts
SupplyCurrent 900 μA
ENVIRONMENTAL AND
MECHANICAL
OperatingTemperature
Commercial(_C_) 0 +70 °C
Industrial(_E_) -40 +85 °C
StorageTemperature -65 +150 °C
SPECIFICATIONS (continued)
T
MIN
toT
MAX
andV
CC
=5V±5%unlessotherwisenoted.
P1-P3P4-P6P7-P8

SP1491ECN-L/TR

Mfr. #:
Buy SP1491ECN-L/TR
Manufacturer:
MaxLinear
Description:
RS-485 Interface IC 20MBPS FULL-DUPLEX RS485 W/+/-15KV ESD
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

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