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QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS114I – JANUARY 1979 – REVISED FEBRUARY 2006
PARAMETER MEASUREMENT INFORMATION
Input A
(see Notes B
and C)
Test Point
V
CC
180 Ω
S1
From Output
Under Test
C
L
(see Note A)
75 Ω
S2
t
PHL
Output Z
PROPAGATION DELAY TIMES AND SKEW
1.5 V
V
OL
TEST CIRCUIT
Output Y
Skew
Skew
t
PLH
V
OH
1.5 V
V
OL
3V
1.3 V
t
PLH
1.3 V
0V
t
PHL
V
OH
Enable G
(see Note D)
Enable G
3V
1.5 V
t
PZL
See Note D
t
PLZ
≈4.5
V
1.5 V
0.5 V
t
PZH
t
PHZ
0.5 V
V
OH
≈1.5
V
≈0
V
S1 Closed
S2 Closed
1.5 V
0V
S1 Closed
S2 Closed
≈1.5
V
V
OL
Waveform 1
(see Note E)
S1 Closed
S2 Open
Waveform 2
(see Note E)
S1 Open
S2 Closed
1.5 V
ENABLE AND DISABLE TIME WAVEFORMS
NOTES: A.
B.
C.
D.
E.
C
L
includes probe and jig capacitance.
All input pulses are supplied by generators having the following characteristics: PRR
≤
1 MHz, Z
O
≈
50
Ω,
t
r
≤
15 ns, t
f
≤
6 ns.
When measuring propagation delay times and skew, switches S1 and S2 are open.
Each enable is tested separately.
Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control.
Figure 1. Test Circuit and Voltage Waveforms
5
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