9397 750 14414 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 04 — 17 January 2005 9 of 16
Philips Semiconductors
74ABT2240
Octal inverting buffer with 30 Ω series termination resistors; 3-state
11. Dynamic characteristics
12. Waveforms
Table 8: Dynamic characteristics
GND = 0 V; t
r
= t
f
= 2.5 ns; C
L
= 50 pF, R
L
= 500
Ω
; for test circuit see Figure 7.
Symbol Parameter Conditions Min Typ Max Unit
T
amb
= 25 °C
t
PLH
propagation delay nAn to nYn V
CC
= 5 V; see Figure 5 1.0 2.8 4.0 ns
t
PHL
propagation delay nAn to nYn V
CC
= 5 V; see Figure 5 3.0 4.3 5.8 ns
t
PZH
output enable time to HIGH-level V
CC
= 5 V; see Figure 6 1.5 3.4 4.7 ns
t
PZL
output enable time to LOW-level V
CC
= 5 V; see Figure 6 3.5 5.5 7.6 ns
t
PHZ
output disable time from HIGH-level V
CC
= 5 V; see Figure 6 1.9 4.1 5.0 ns
t
PLZ
output disable time from LOW-level V
CC
= 5 V; see Figure 6 2.5 3.4 5.8 ns
T
amb
= −40 °C to +85 °C
t
PLH
propagation delay nAn to nYn V
CC
= 5 V ± 0.5 V; see Figure 5 1.0 - 4.9 ns
t
PHL
propagation delay nAn to nYn V
CC
= 5 V ± 0.5 V; see Figure 5 3.0 - 6.0 ns
t
PZH
output enable time to HIGH-level V
CC
= 5 V ± 0.5 V; see Figure 6 1.5 - 5.8 ns
t
PZL
output enable time to LOW-level V
CC
= 5 V ± 0.5 V; see Figure 6 3.5 - 8.4 ns
t
PHZ
output disable time from HIGH-level V
CC
= 5 V ± 0.5 V; see Figure 6 1.9 - 5.6 ns
t
PLZ
output disable time from LOW-level V
CC
= 5 V ± 0.5 V; see Figure 6 2.5 - 6.4 ns
V
M
= 1.5 V.
V
OL
and V
OH
are typical voltage output drop that occur with the output load.
Fig 5. Propagation delays of input (nAn) to output (nYn)
001aac385
V
M
V
M
t
PHL
t
PLH
GND
V
OH
V
OL
V
I
nAn input
nYn output