Test Circuit
DS100294-6
Notes:
=
=
EE
V
, V
CC
+2V, V
−2.5V
CCA
=
L1 and L2 equal length 50Ω impedance lines
=
R
50Ω terminator internal to scope
T
Decoupling 0.1 µF from GND to V and V
CC EE
All unused outputs are loaded with 50Ω to GND
=
C
L
Fixture and stray capacitance ≤ 3 pF
Pin numbers shown are for flatpak; for DIP see logic symbol
FIGURE 1. AC Test Circuit
(Using Quad Cerpak)
Switching Waveforms
DS100294-7
FIGURE 2. Enable Timing
www.national.com
6