9397 750 14414 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 04 — 17 January 2005 10 of 16
Philips Semiconductors
74ABT2240
Octal inverting buffer with 30 Ω series termination resistors; 3-state
V
M
= 1.5 V.
V
OL
and V
OH
are typical voltage output drop that occur with the output load.
Fig 6. Enable and disable times of 3-state outputs
Test data is given in Table 9.
Definitions test circuit:
R
T
= Termination resistance should be equal to output impedance Z
o
of the pulse generator.
C
L
= Load capacitance including jig and probe capacitance.
R
L
= Load resistor.
V
EXT
= Test voltage for switching times.
Fig 7. Test circuit for 3-state outputs
Table 9: Test data
Input Load V
EXT
V
I
t
r
, t
f
C
L
R
L
t
PHZ
, t
PZH
t
PLZ
, t
PZL
t
PLH
, t
PHL
3 V 2.5 ns 50 pF 500 Ω open 7 V open
001aac386
t
PZL
nYn output
nYn output
nOE input
V
OL
V
OH
3.5 V
V
I
V
M
GND
0 V
t
PLZ
t
PZH
t
PHZ
V
OL
+
0.3 V
V
OH
− 0.3 V
V
M
V
M
V
EXT
V
CC
V
I
V
O
mna616
D.U.T.
C
L
R
T
R
L
R
L
PULSE
GENERATOR
