Datasheet

SN55LBC176, SN65LBC176, SN65LBC176Q, SN75LBC176
DIFFERENTIAL BUS TRANSCEIVERS
SLLS067H AUGUST 1990 REVISED DECEMBER 2010
8
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
V
OC
2
R
L
V
OD2
V
test
V
OD3
60 Ω
375 Ω
375 Ω
2
R
L
Figure 1. Driver V
OD
and V
OC
Figure 2. Driver V
OD3
VOLTAGE WAVEFORMS
50%
t
t(OD)
t
d(ODL)
10%
t
t(OD)
2.5 V
2.5 V
90%
50%
Output
t
d(ODH)
0 V
3 V
1.5 V
Input
TEST CIRCUIT
Output
C
L
= 50 pF
(see Note B)
R
L
= 54 Ω
50 Ω
3 V
Generator
(see Note A)
1.5 V
Figure 3. Driver Test Circuit and Voltage Waveforms
VOLTAGE WAVEFORMS
t
PHZ
1.5 V
2.3 V
0.5 V
0 V
3 V
t
PZH
Output
Input
1.5 V
S1
0 V or 3 V
Output
TEST CIRCUIT
50 Ω
V
OH
V
off
0 V
R
L
= 110 Ω
Generator
(see Note A)
C
L
= 50 pF
(see Note B)
Figure 4. Driver Test Circuit and Voltage Waveforms
TEST CIRCUIT
Output
R
L
= 110 Ω
5 V
S1
50 Ω
3 V or 0 V
VOLTAGE WAVEFORMS
5 V
V
OL
0.5 V
t
PZL
3 V
0 V
t
PLZ
2.3 V
1.5 V
Output
Input
C
L
= 50 pF
(see Note B)
Generator
(see Note A)
1.5 V
Figure 5. Driver Test Circuit and Voltage Waveforms
NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR 1 MHz, 50% duty cycle, t
r
6 ns, t
f
6 ns,
Z
O
=50Ω.
B. C
L
includes probe and jig capacitance.