Datasheet
SN65ALS1176
DIFFERENTIAL BUS TRANSCEIVER
SLLS295A – APRIL 1998 – REVISED DECEMBER 1999
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
DRIVER SECTION
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS
†
MIN TYP
‡
MAX UNIT
V
IK
Input clamp voltage I
I
= –18 mA –1.5 V
V
O
Output voltage I
O
= 0 0 6 V
|V
OD1
| Differential output voltage I
O
= 0 1.5 6 V
|V
OD2
|
Differential out
p
ut voltage
R
L
= 100 Ω, See Figure 1
1/2V
OD
1
or 2
§
V
|V
OD2
|
Differential
o
u
tp
u
t
v
oltage
R
L
= 54 Ω, See Figure 1 2.1 2.5 5 V
V
OD3
Differential output voltage V
test
= –7 V to 12 V, See Figure 2 1.5 5 V
∆ |V
OD
|
Change in magnitude of differential
output voltage
¶
±0.2 V
V
OC
Common mode out
p
ut voltage
R
L
=54Ω or 100 Ω
See Figure 1
3
V
V
OC
Common
-
mode
o
u
tp
u
t
v
oltage
R
L
=
54
Ω
or
100
Ω
,
See
Fig
u
re
1
–1
V
∆ |V
OC
|
Change in magnitude of common-mode
output voltage
¶
±0.2 V
I
O
Out
p
ut current
Outputs disabled,
V
O
= 12 V 1
mA
I
O
O
u
tp
u
t
c
u
rrent
,
See Note 4
V
O
= –7 V –0.8
mA
I
IH
High-level input current V
I
= 2.4 V 20 µA
I
IL
Low-level input current V
I
= 0.4 V –400 µA
#
V
O
= –4 V –250
I
OS
Short circuit out
p
ut current
#
V
O
= 0 –150
mA
I
OS
Short
-
circ
u
it
o
u
tp
u
t
c
u
rrent
#
V
O
= V
CC
250
mA
V
O
= 8 V 250
I
CC
Su
pp
ly current
No load
Outputs enabled 23 30
mA
I
CC
S
u
ppl
y
c
u
rrent
No
load
Outputs disabled 19 26
mA
†
The power-off measurement in TIA/EIA-422-B applies to disabled outputs only and is not applied to combined inputs and outputs.
‡
All typical values are at V
CC
= 5 V and T
A
= 25°C.
§
The minimum V
OD2
with a 100-Ω load is either 1/2 V
OD1
or 2 V, whichever is greater.
¶
∆ |V
OD
| and ∆ |V
OC
| are the changes in magnitude of V
OD
and V
OC
, respectively, that occur when the input is changed from one logic state to
the other.
#
Duration of the short circuit should not exceed one second for this test.
NOTE 4: This applies for both power on and power off; refer to TIA/EIA-485-A for exact conditions. The TIA/EIA-422-B limit does not apply for
a combined driver and receiver terminal.