Datasheet
SN55LBC176, SN65LBC176, SN65LBC176Q, SN75LBC176
DIFFERENTIAL BUS TRANSCEIVERS
SLLS067H − AUGUST 1990 − REVISED DECEMBER 2010
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
DRIVER SECTION
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN 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
55LBC176
,
| V |
Diff ti l t t lt
R
L
= 54 Ω
,
See Fi
g
ure 1
,
55LBC176
,
65LBC176,
1.1
V
| V
OD2
| Differential output voltage
R
L
= 54 Ω
,
See Note 3
See Figure 1
,
65LBC176
,
65LBC176Q
1
.
1
V
See Note 3
75LBC176 1.5 5
S
55LCB176,
65LCB176
11
V
OD3
Differential output voltage
V
test
= − 7 V to 12 V,
See Note 3
See Figure 2,
65LCB176,
65LBC176Q
1.1
V
See Note 3
75LBC176 1.5 5
Δ| V
OD
|
Change in magnitude of differential
output voltage
†
−0.2 0.2 V
V
OC
Common-mode output voltage
R
L
= 54 Ω or 100 Ω, See Figure 1
−1 3 V
Δ| V
OC
|
Change in magnitude of
common-mode output voltage
†
R
L
54 Ω or 100 Ω,
See Figure 1
−0.2 0.2 V
I
Output current
Output disabled,
V
O
= 12 V 1
mA
I
O
Output current
Output disabled
,
See Note 4
V
O
= − 7 V −0.8
mA
I
IH
High-level input current V
I
= 2.4 V −100 μA
I
IL
Low-level input current V
I
= 0.4 V −100 μA
V
O
= − 7 V −250
I
Short circuit output current
V
O
= 0 −150
mA
I
OS
Short-circuit output current
V
O
= V
CC
250
mA
V
O
= 12 V
250
Receiver disabled
55LBC176,
65LBC176Q
1.75
I
Supply current
V
I
= 0 or V
CC
,
Receiver disabled
and driver enabled
65LBC176,
75LBC176
1.5
mA
I
CC
Supply current
V
I
= 0 or V
CC
,
No load
Receiver and driver
55LBC176,
65LBC176Q
0.25
mA
Receiver and driver
disabled
65LBC176,
75LBC176
0.2
†
Δ | V
OD
| and Δ | V
OC
| are the changes in magnitude of V
OD
and V
OC
, respectively, that occur when the input changes from a high level to a
low level.
NOTES: 3. This device meets the V
OD
requirements of TIA/EIA−485−A above 0°C only.
4. This applies for both power on and off; refer to TIA/EIA−485−A for exact conditions.