Datasheet

VOLTAGE WAVEFORMS
50%
t
f
t
PHL
10%
t
r
≈ 1.5 V
≈ − 1.5 V
90%
50%
Output
t
PLH
0 V
3 V
1.5 V
Input
TEST CIRCUIT
Output
C
L
= 50 pF
(see Note B)
R
L
= 54 Ω
50 Ω
Generator
(see Note A)
1.5 V
TEST CIRCUIT VOLTAGE WAVEFORMS
V
OL
V
OH
3 V
0 V
t
PHL
t
PLH
Output
Input
1.3 V
1.5 V
1.3 V
50 Ω
Output
1.5 V
Generator
(see Note A)
A
B
t
r
90%
10%10%
90%
t
f
C
L
= 15 pF
(see Note B)
1.5 V
SN65LBC179A
SN75LBC179A
SLLS377D –MAY 2000– REVISED SEPTEMBER 2011 www.ti.com
PARAMETER MEASURMENT INFORMATION (continued)
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
= 50 Ω.
B. C
L
includes probe and jig capacitance.
Figure 3. Driver Test Circuits and Voltage Waveforms
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
= 50 Ω.
B. CL includes probe and jig capacitance.
Figure 4. Receiver Test Circuit and Voltage Waveforms
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