Datasheet

SN55LBC176, SN65LBC176, SN65LBC176Q, SN75LBC176
DIFFERENTIAL BUS TRANSCEIVERS
SLLS067H AUGUST 1990 REVISED DECEMBER 2010
6
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature
PARAMETER TEST CONDITIONS
SN55LBC176
SN65LBC176Q
SN65LBC176
SN75LBC176
UNIT
PARAMETER
TEST CONDITIONS
MIN TYP MAX MIN TYP
MAX
UNIT
t
d(OD)
Differential output delay time
R 54 Ω
C 50 F
8 31 8 25 ns
t
t(OD)
Differential output transition time
R
L
= 54 Ω,
See Figure 3
C
L
= 50 pF,
12 12 ns
t
sk(p)
Pulse skew (| t
d(ODH)
t
d(ODL)
|)
S
ee
Fi
gure
3
6 0 6 ns
t
PZH
Output enable time to high level R
L
= 110 Ω, See Figure 4 65 35 ns
t
PZL
Output enable time to low level R
L
= 110 Ω, See Figure 5 65 35 ns
t
PHZ
Output disable time from high level R
L
= 110 Ω, See Figure 4 105 60 ns
t
PLZ
Output disable time from low level R
L
= 110 Ω, See Figure 5 105 35 ns
All typical values are at V
CC
= 5 V, T
A
= 25°C.
SYMBOL EQUIVALENTS
DATA SHEET PARAMETER RS-485
V
O
V
oa
, V
ob
| V
OD1
| V
o
| V
OD2
| V
t
(R
L
= 54 Ω)
| V
OD3
|
V
t
(test termination
measurement 2)
Δ | V
OD
| || V
t
| | V
t
||
V
OC
| V
os
|
Δ | V
OC
| | V
os
V
os
|
I
OS
None
I
O
I
ia
, I
ib