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.........................-0.3V to (Vcc + 0.5V)
Drivers......................-0.3V to (Vcc + 0.5V)
Receivers.........................................+/-15V
Output Voltages
Logic.........................-0.3V to (Vcc + 0.5V)
Drivers.............................................+/-15V
Receivers..................-0.3V to (Vcc + 0.5V)
Storage Temperature.......................-65˚C to +150˚C
Power Dissipation
8-pin NSOIC...................................................550mW
(derate 6.60mW/ºC above +70ºC)
8-pin PDIP....................................................000mW
(derate .8mW/ºC above +70ºC)
T
MIN
to T
MAX
and V
CC
= +5.0V +/-5% unless otherwise noted.
ELECTRICAL CHARACTERISTICS
TYP.
MAX.
UNITS
CONDITIONS
PARAMETERS
SP481E/SP485E 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
SP481E/SP485E DRIVER
AC Characteristics
Max. Transmission Rate
Driver Input to Output, t
PLH
Driver Input to Output, t
PLH
(SP485EMN ONLY)
Driver Input to Output, t
PHL
Driver Input to Output, t
PHL
(SP485EMN ONLY)
Driver Skew
Driver Rise or Fall Time
MIN.
GND
2
.5
Vcc
Vcc
Vcc
0.2
Volts
Volts
Volts
Volts
Unloaded; R = ∞ ; see Figure 1
With Load; R = 50Ω (RS-422); see
Figure 1
With Load; R = 27Ω (RS-485); see
Figure 1
R = 27Ω or R = 50Ω; see Figure 1
3
2.0
0.8
+/-0
+/-250
+/-250
Volts
Volts
Volts
µA
mA
mA
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
0
20
20
20
20
30
30
30
30
5
3
5
60
80
60
80
0
40
Mbps
ns
ns
ns
ns
ns
ns
RE = 5V, DE = 5V; R
DIFF
= 54Ω,
C
L
= C
L2
= 00pF
See Figures 3 & 5, R
DIFF
= 54Ω,
C
L
= C
L2
= 00pF
See Figures 3 & 5, R
DIFF
= 54Ω,
C
L
= C
L2
= 00pF
see Figures 3 and 5,
t
SKEW
= |t
DPHL
- t
DPLH
|
From 0%-90%; R
DIFF
= 54Ω
C
L
= C
L2
= 100pF; see Figures 3
and 6
SP48E,485E_00_2808
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com
2
EXAR [ EXAR CORPORATION ]
