Datasheet

SN65ALS176, SN75ALS176, SN75ALS176A, SN75ALS176B
DIFFERENTIAL BUS TRANSCEIVERS
SLLS040H – AUGUST 1987 – REVISED JUNE 2000
9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
V
OD3
V
test
375 Ω
375 Ω
60 Ω
Figure 2. Driver V
OD3
TEST CIRCUIT VOLTAGE WAVEFORMS
3 V
0 V
≈–2.5 V
50%
10%
t
t(OD)
t
t(OD)
t
d(ODL)
(see Note C)
50%
10%
90%90%
1.5 V
t
d(ODH)
(see Note C)
Output
Input
Output
3 V
50 Ω
R
L
= 54 Ω
≈2.5 V
Generator
(see Note B)
C
L
= 50 pF
(see Note A)
1.5 V
NOTES: A. C
L
includes probe and jig capacitance.
B. 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.
C. t
d
(
OD
)
= t
d
(
ODH
)
or t
d
(
ODL
)
Figure 3. Driver Test Circuit and Voltage Waveforms
TEST CIRCUIT VOLTAGE WAVEFORMS
1.5 V
V
OH
t
PHZ
t
PZH
0 V
3 V
1.5 V
2.3 V
Output
Input
Output
S1
0 V or 3 V
R
L
= 110 Ω
50 Ω
V
off
≈ 0
Generator
(see Note B)
C
L
= 50 pF
(see Note A)
NOTES: A. C
L
includes probe and jig capacitance.
B. 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.
Figure 4. Driver Test Circuit and Voltage Waveforms