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 T
MAX
and V
CC
= 5V
±
5% unless otherwise noted.
PARAMETERS
SP481/SP483/SP485 DRIVER
DC Characteristics
Differential Output Voltage
Differential Output Voltage
Differential Output Voltage
Change in Magnitude of Driver
Differential Output Voltage for
Complimentary States
Driver Common-Mode
Output Voltage
Input High Voltage
Input Low Voltage
Input Current
Driver Short-Circuit Current
V
OUT
= HIGH
V
OUT
= LOW
SP481/SP485 DRIVER
AC Characteristics
Maximum Data Rate
Driver Input to Output
Driver Input to Output
Driver Skew
Driver Rise or Fall Time
Driver Enable to Output High
Driver Enable to Output Low
Driver Disable Time from Low
Driver Disable Time from High
MIN.
TYP.
MAX.
UNITS
CONDITIONS
GND
2
1.5
V
CC
V
CC
V
CC
0.2
3
Volts
Volts
Volts
Volts
Volts
Volts
Volts
µA
mA
mA
Unloaded; R =
∞
;
see figure 1
with load; R = 50Ω; (RS422);
see figure 1
with load; R = 27Ω; (RS485);
see figure 1
R = 27Ω or R = 50Ω;
see figure 1
R = 27Ω or R = 50Ω;
see figure 1
Applies to DE, DI, RE
Applies to DE, DI, RE
Applies to DE, DI, RE
-7V
≤
V
O
≤
+12V
-7V
≤
V
O
≤
+12V
2.0
0.8
±10
35
35
250
250
5
30
30
5
15
40
40
40
40
60
60
10
40
70
70
70
70
Mbps
ns
ns
ns
ns
ns
ns
ns
ns
RE = 5V, DE = 5V
t
PLH
; R
DIFF
= 54Ω, C
L1
= C
L2
= 100pF;
see figures 3 and 6
t
PHL
; R
DIFF
= 54Ω, C
L1
= C
L2
= 100pF;
see figures 3 and 6
see figures 3 and 6,
t
SKEW
= | t
DPLH
- t
DPHL
|
From 10% to 90%; R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF;
see figures 3 and 6
C
L
= 100pF;
see figures 4 & 7;
S
2
closed
C
L
= 100pF;
see figures 4 & 7;
S
1
closed
C
L
= 15pF;
see figures 2 & 9;
S
1
closed
C
L
= 15pF;
see figures 2 & 9;
S
2
closed
SP481/SP483/SP485 RECEIVER
DC Characteristics
Differential Input Threshold
Input Hysteresis
Output Voltage High
2.4
Output Voltage Low
0.0
Three-State (High Impedance)
Output Current
Input Resistance
Input Current (A, B); V
IN
= 12V
Input Current (A, B); V
IN
= -7V
Short-Circuit Current
+0.2
10
5
0.4
±1
15
+1.0
-0.8
95
Volts
mV
Volts
Volts
µA
kΩ
mA
mA
mA
-7V
≤
V
CM
≤
+12V
V
CM
= 0V
I
O
= -4mA,V
ID
= +200mV
I
O
= +4mA,V
ID
= -200mV
0.4V
≤
V
O
≤
2.4V; RE = 5V
-7V
≤
V
CM
≤
+12V
DE = 0V, V
CC
= 0V or 5.25V, V
IN
= 12V
DE = 0V, V
CC
= 0V or 5.25V, V
IN
= -7V
0V
≤
V
CM
≤
V
CC
Rev. 07/28/04
SP481/483/485 Low Power Half-Duplex RS485 Transceivers
© Copyright 2002 Sipex Corporation
2
SIPEX [ SIPEX CORPORATION ]
