ABsoLUte MAXiMUM rAtinGs
Output Voltages
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 (V
CC
+0.5V)
Drivers................................................-0.3V to (V
CC
+0.5V)
Receivers................................................................. ±15V
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 per Package
8-pin NSOIC (derate 6.60mW/
o
C above +70
o
C).........................550mW
eLectricAL cHArActeristics
T
MIN
to T
MAX
and V
CC
= 5V ± 5% unless otherwise noted.
pArAMeters
sp1481e/sp1485e 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
sp1481e/sp1485e driver
Ac characteristics
Maximum Data Rate
Driver Input to Output
Driver Input to Output
(SP1485EMN ONLY)
Driver Input to Output
Driver Input to Output
(SP1485EMN ONLY)
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
3.5
2
1.5
2.0
V
CC
V
CC
V
CC
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
0.2
3
0.8
±10
±250
±250
Volts
Volts
Volts
Volts
μA
mA
mA
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
20
20
20
20
20
3
8
40
40
40
40
30
40
30
40
5
20
70
70
70
70
Mbps
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
RE = 5V, DE = 5V; R
DIFF
= 54Ω,
C
L1
= C
L2
= 00pF
t
PLH
; R
DIFF
= 54Ω, C
L1
= C
L2
= 100pF;
see Figures 3 and 5
t
PLH
; R
DIFF
= 54Ω, C
LI
= C
L2
= 100pF;
See Figures 3 and 5
t
PHL
; R
DIFF
= 54Ω, C
L1
= C
L2
= 100pF;
see Figures 3 and 5
t
PHL
; R
DIFF
= 54Ω, C
L1
= C
L2
= 100pF;
see Figures 3 and 5
see Figures 3 and 5,
t
SKEW
= | t
PLH
- t
PHL
|
From 10% to 90%; R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF; see Figures 3 & 6
C
L
= 100pF; see Figures 4 & 6; S
2
closed
C
L
= 100pF; see Figures 4 & 6; S
closed
C
L
= 100pF; see Figures 4 & 6; S
closed
C
L
= 100pF; see Figures 4 & 6; S
2
closed
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com
SP48E-485E_00_06609
2
EXAR [ EXAR CORPORATION ]
