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SP508E Datasheet(PDF) 4 Page - Exar Corporation

Part # SP508E
Description  Rugged 20Mbps, 8 Channel Multi-Protocol Transceiver with Programmable DCE/DTE and Termination Resistors
PDF  29 Pages
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

SP508E Datasheet(HTML) 4 Page - Exar Corporation

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ExarCorporation48720KatoRoad,FremontCA,94538•50-668-707•www.exar.comSP508E_00_07242
T
A=-40°Cto+85°CandVCC=+4.75Vto+5.25Vunlessotherwisenoted.TypicalvaluesareforTA=25CandVcc=5V
PARAMETER
MIN.
TYP.
MAX.
UNITs
CONDITIONs
V.11 RECEIVER (cont)
DC Parameters (cont.)
InputCurrent
–3.25
±3.25
mA
perFigure20and22;
poweronoroff
Current w/ 100Ω Termination
±60.75
mA
per Figure 23 and 24
InputImpedance
4
kΩ
AC Parameters
PropagationDelay
UsingC
L=50pF;
t
PHL
30
85
ns
perFigures33and38
t
PLH
30
85
ns
perFigures33and38
Skew(|t
phl-tplh|)
5
0
ns
perFigure33
Max.TransmissionRate
20
Mbps
ChanneltoChannelSkew
2
ns
V.35 DRIVER
DC Parameters
Outputs
TestTerminatedVoltage
±0.44
±0.66 Volts
perFigure25
Offset
±0.6
Volts
perFigure25
OutputOvershoot
-0.2V
ST
+0.2V
ST
Volts
perFigure25;V
ST=Steadystatevalue
Source Impedance
50
150
Ω
per Figure 27; Z
S=V2/Vx50
Short-Circuit Impedance
135
165
Ω
per Figure 28
AC Parameters
Outputs
TransitionTime
7
20
ns
perFigure29;0%to90%
PropagationDelay
t
PHL
30
85
ns
perFigure33and36;C
L=20pF
t
PLH
30
85
ns
perFigure33and36;C
L=20pF
DifferentialSkew
5
0
ns
perFigure33and36;C
L=20pF
(|t
phl-tplh|)
Max.TransmissionRate
20
Mbps
ChanneltoChannelSkew
2
ns
V.35 RECEIVER
DC Parameters
Inputs
Sensitivity
±50
+200
mV
Source Impedance
90
110
Ω
per Figure 30; Z
S=V2/V x 50Ω
Short-Circuit Impedance
135
165
Ω
per Figure 31
AC Parameters
PropagationDelay
t
PHL
30
85
ns
perFigure33and38;C
L=20pF
t
PLH
30
85
ns
perFigure33and38;C
L=20pF
Skew(|t
phl-tplh|)
5
0
ns
perFigure33;C
L=20pF
Max.TransmissionRate
20
Mbps
ChanneltoChannelSkew
2
ns
TRANsCEIVER LEAkAgE CURRENT
DriverOutput3-StateCurrent
500
µA
perFigure32;Driversdisabled
RcvrOutput3-StateCurrent

0
µA
T
X&RXdisabled,0.4V-VO-2.4V
POWER REQUIREMENTs
V
CC
4.75
5.00
5.25 Volts
I
CC (ShutdownMode)
200
µA
AllI
CCvaluesarewithVCC=+5V
(V.28/RS-232)
95
mA
f
IN=20kbps;Driversactive&loaded
(V./RS-422)
230
mA
f
IN=0Mbps;Driversactive&loaded
(EIA-530&RS-449)
270
mA
f
IN=0Mbps;Driversactive&loade
(V.35)
70
mA
V.35@f
IN=0Mbps,V.28@20kbps
(EIA-530A)
200
mA
f
IN=0Mbps;Driversactive&loaded
ELECTRICALSPECIFICATIONS



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