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SP485 Datasheet(PDF) 2 Page - Sipex Corporation

Part No. SP485
Description  Low Power Half-Duplex RS-485 Transceivers
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Maker  SIPEX [Sipex Corporation]
Homepage  http://www.sipex.com
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 2 page
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2
Rev. 07/28/04
SP481/483/485 Low Power Half-Duplex RS485 Transceivers
© Copyright 2002 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........................................................................................................±12V
Input Voltages
Logic........................................................-0.3V to (V
CC+0.5V)
Drivers..................................................-0.3V to (V
CC+0.5V)
Receivers................................................................. ±15V
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...........................................................................500mW
ELECTRICAL CHARACTERISTICS
T
MIN to TMAX and VCC = 5V ± 5% unless otherwise noted.
PARAMETERS
MIN.
TYP.
MAX.
UNITS
CONDITIONS
SP481/SP483/SP485 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 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
35
250
mA
-7V ≤ V
O ≤ +12V
V
OUT = LOW
35
250
mA
-7V ≤ V
O ≤ +12V
SP481/SP485 DRIVER
AC Characteristics
Maximum Data Rate
Mbps
RE = 5V, DE = 5V
Driver Input to Output
30
60
ns
t
PLH; RDIFF = 54Ω, CL1 = CL2 = 100pF;
see figures 3 and 6
Driver Input to Output
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
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
L = 100pF; see figures 4 & 7; S2 closed
Driver Enable to Output Low
40
70
ns
C
L = 100pF; see figures 4 & 7; S1 closed
Driver Disable Time from Low
40
70
ns
C
L = 15pF; see figures 2 & 9; S1 closed
Driver Disable Time from High
40
70
ns
C
L = 15pF; see figures 2 & 9; S2 closed
SP481/SP483/SP485 RECEIVER
DC Characteristics
Differential Input Threshold
+0.2
Volts
-7V ≤ V
CM ≤ +12V
Input Hysteresis
10
mV
V
CM = 0V
Output Voltage Hig
h
2.4
Volts
I
O = -4mA,VID = +200mV
Output Voltage Low
0.4
Volts
I
O = +4mA,VID = -200mV
Three-State (High Impedance)
Output Current
±1
µA
0.4V ≤ V
O ≤ 2.4V; RE = 5V
Input Resistance
15
kΩ
-7V ≤ V
CM ≤ +12V
Input Current (A, B); V
IN = 12V
+1.0
mA
DE = 0V, V
CC = 0V or 5.25V, VIN = 12V
Input Current (A, B); V
IN = -7V
-0.8
mA
DE = 0V, V
CC = 0V or 5.25V, VIN = -7V
Short-Circuit Current
95
mA
0V ≤ V
CM ≤ VCC
5
5
0.0




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