Datasheet

SN75ALS1177, SN75ALS1178
DUAL DIFFERENTIAL DRIVERS AND RECEIVERS
SLLS154B – MARCH 1993 – REVISED FEBRUARY 2001
9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
Output
0 V
V
OL
t
PLZ
t
PZL
Output
R
L
= 500 Ω
S1
DRIVER VOLTAGE WAVEFORMSDRIVER TEST CIRCUIT
50 Ω
Input
0 V
3 V
3 V or 0 V
0.5 V
V
CC
Generator
(see Note B)
NOTES: A. C
L
includes probe and jig capacitance.
B. The pulse generator has the following characteristics: PRR ≤ 1 MHz, 50% duty cycle, t
r
≤ 10 ns, t
f
≤ 10 ns.
C
L
(see Note A)
1.5 V 1.5 V
2.3 V
Figure 5. Driver Enable and Disable Times
RECEIVER TEST CIRCUIT
1N916 or
Equivalent
1 kΩ
1 kΩ
0 V
50 Ω
0 V
(SN75ALS1177 only)
Output
V
CC
V
OL
V
OH
t
PLH
t
PHL
DRIVER VOLTAGE WAVEFORMS
Output
Input
–2.5 V
2.5 V
Generator
(see Note B)
NOTES: A. C
L
includes probe and jig capacitance.
B. The pulse generator has the following characteristics: PRR ≤ 1 MHz, 50% duty cycle, t
r
≤ 10 ns, t
f
≤ 10 ns.
C
L
(see Note A)
1.5 V 1.5 V
0 V 0 V
Figure 6. Receiver Propagation Delay Times