Datasheet

SN751177, SN751178
DUAL DIFFERENTIAL DRIVERS AND RECEIVERS
SLLS059D – FEBRUARY 1990 – REVISED MAY 1999
10
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
V
OL
V
OH
t
PHL
t
PLH
Output
VOLTAGE WAVEFORMSTEST CIRCUIT
50 Ω
Output
Input
0 V
3 V
Generator
(see Note B)
C
L
= 15 pF
(see Note A)
NOTES: A. C
L
includes probe and jig capacitance.
B. The pulse generator has the following characteristics: PRR ≤ 1 MHz, 50% duty cycle, Z
O
= 50 Ω, t
r
≤ 6 ns, t
f
≤ 6 ns.
1.5 V 0 V
1.5 V 1.5 V
1.3 V 1.3 V
Figure 7. Receiver Propagation-Time Test Circuit and Voltage Waveforms
VOLTAGE WAVEFORMS
≈ 1.3 V
0.5 V
t
PHZ
3 V
0 V
V
OH
Input
Output
0 V
3 V
V
OL
S1 to –1.5 V
S2 Closed
S3 Open
V
OL
1.5 V
≈ 4.5 V
t
PZL
3 V
1.5 V
0 V
Output
Input
t
PZH
0 V
V
OH
0 V
1.5 V
3 V
1.5 V
TEST CIRCUIT
1N916 or Equivalent
2 kΩ
5 kΩ
50 Ω
≈ 1.3 V
t
PLZ
S1 to –1.5 V
S2 Closed
S3 Closed
S1 to 1.5 V
S2 Closed
S3 Closed
Generator
(see Note B)
C
L
= 15 pF
(see Note A)
Input
Output
Output
Input
S1 to 1.5 V
S3 Closed
S2 Open
NOTES: A. C
L
includes probe and jig capacitance.
B. The pulse generator has the following characteristics: PRR ≤ 1 MHz, 50% duty cycle, Z
O
= 50 Ω, t
r
≤ 6 ns, t
f
≤ 6 ns.
5 V
S3
1.5 V
–1.5 V
S1
S2
0.5 V
1.5 V
1.5 V
Figure 8. Receiver Output Enable- and Disable-Time Test Circuit and Voltage Waveforms