Datasheet

SN65ALS1176
DIFFERENTIAL BUS TRANSCEIVER
SLLS295A – APRIL 1998 – REVISED DECEMBER 1999
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature range
PARAMETER TEST CONDITIONS MIN TYP
†
MAX UNIT
t
d(OD)
Differential output delay time
R54Ω
C50F
15 ns
t
sk(p)
Pulse skew
‡
R
L
= 54 Ω,
See Figure 3
C
L
= 50 pF,
0 2 ns
t
t(OD)
Differential output transition time
See
Figure
3
8 ns
t
PZH
Output enable time to high level
R
L
= 110 Ω,
See Figure 4
C
L
= 50 pF,
80 ns
t
PZL
Output enable time to low level
R
L
= 110 Ω,
See Figure 5
C
L
= 50 pF,
30 ns
t
PHZ
Output disable time from high level
R
L
= 110 Ω,
See Figure 4
C
L
= 50 pF,
50 ns
t
PLZ
Output disable time from low level
R
L
= 110 Ω,
See Figure 5
C
L
= 50 pF,
30 ns
†
All typical values are at V
CC
= 5 V, T
A
= 25°C.
‡
Pulse skew is defined as the |t
PLH
– t
PHL
| of each channel of the same device.
SYMBOL EQUIVALENTS
DATA-SHEET PARAMETER
TIA/EIA-422-B TIA/EIA-485-A
V
O
V
oa
, V
ob
V
oa
, V
ob
|V
OD1
| V
o
V
o
|V
OD2
| V
t
(R
L
= 100 Ω) V
t
(R
L
= 54 Ω)
|V
OD3
| None
V
t
(test termination
measurement 2)
∆ |V
OD
| ||V
t
| – |V
t
|| ||V
t
| – |V
t
||
V
OC
|V
os
| |V
os
|
∆ |V
OC
| |V
os
– V
os
| |V
os
– V
os
|
I
OS
|I
sa
|, |I
sb
| None
I
O
|I
xa
|, |I
xb
| I
ia
, I
ib