100319
Test Circuitry
Notes:
V
CC
, V
CCA
= +2V,
V
EE
= −2.5V
L1 and L2
=
equal length 50Ω impedance lines
R
T
=
50Ω terminator internal to scope
Decoupling 0.1
µF
from GND to V
CC
and V
EE
All unused outputs are loaded with 25Ω to GND
C
L
=
Fixture and stray capacitance
≤
3 pF
FIGURE 1. AC Test Circuit
Switching Waveforms
Note:
The output AC measurement point for cut-off propagation delay testing
=
the 50% voltage point between active V
OL
and V
OH
.
FIGURE 2. Propagation Delay, Cut-Off and Transition Times
5
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