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SP490 Datasheet(PDF) 5 Page - Sipex Corporation

Part # SP490
Description  Full Duplex RS-485 Transceivers
Download  12 Pages
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Manufacturer  SIPEX [Sipex Corporation]
Direct Link  http://www.sipex.com
Logo SIPEX - Sipex Corporation

SP490 Datasheet(HTML) 5 Page - Sipex Corporation

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Date: 02/24/05
SP490/491 Full Duplex RS-485 Transceivers
© Copyright 2005 Sipex Corporation
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 specifications below is not implied. Exposure to absolute maximum
rating conditions for extended periods of time may affect reliability.
V
CC............................................................................................................................+7V
Input Voltages
Logic...................................................-0.5V to (V
CC+0.5V)
Drivers................................................-0.5V to (V
CC+0.5V)
Receivers..................................................................±14V
Output Voltages
Logic...................................................-0.5V to (V
CC+0.5V)
Drivers......................................................................±14V
Receivers...........................................-0.5V to (V
CC+0.5V)
Storage Temperature......................................................-65˚C to +150
Power Dissipation.....................................................................1000mW
T
MIN to TMAX and VCC = 5V ± 5% unless otherwise noted.
PARAMETERS
MIN.
TYP.
MAX.
UNITS
CONDITIONS
SP491 DRIVER
DC Characteristics
Differential Output Voltage
GND
V
CC
Volts
Unloaded; R = ∞ ; see figure 1
Differential Output Voltage
2
V
CC
Volts
With Load; R = 50Ω; (RS422);
see figure 1
Differential Output Voltage
1.5
V
CC
Volts
With Load; R = 27Ω; (RS485); 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 D, REB, DE
Input Low Voltage
0.8
Volts
Applies to D, REB, DE
Input Current
±10
µA
Applies to D, REB, DE
Driver Short-Circuit Current
V
OUT = HIGH
35
250
mA
-7V ≤ V
O ≤ 12V
V
OUT = LOW
35
250
mA
-7V ≤ V
O ≤ 12V
SP491 DRIVER
AC Characteristics
Maximum Data Rate
5
Mbps
REB = 5V, DE = 5V
Driver Input to Output
20
30
60
ns
t
PLH; RDIFF = 54Ω, CL1 = CL2 = 100pF;
see figures 3 and 6
Driver Input to Output
20
30
60
ns
t
PHL; RDIFF = 54Ω, CL1 = CL2 = 100pF;
see figures 3 and 6
Driver Skew
5
10
ns
see figures 3 and 6,
t
SKEW = | tDPLH - tDPHL |
Driver Rise or Fall Time
3
15
40
ns
From 10% to 90%; R
DIFF = 54Ω,
C
L1 = CL2 = 100pF; see figures 3 and 6
Driver Enable to Output High
40
70
ns
C
L1 = CL2 = 100pF; see figures
4 and 7;
S
2 closed
Driver Enable to Output Low
40
70
ns
C
L1 = CL2 = 100pF; see figures
4 and 7;
S
1 closed
Driver Disable Time from Low
40
70
ns
C
L1 = CL2 = 100pF; see figures
4 and 7;
S
1 closed
Driver Disable Time from High
40
70
ns
C
L1 = CL2 = 100pF; see figures
4 and 7;
S
2 closed
ELECTRICAL CHARACTERISTICS


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