74ABT544 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
Product data sheet Rev. 6 — 3 November 2011 7 of 16
NXP Semiconductors
74ABT544
Octal latched transceiver with dual enable; 3-state
11. Waveforms
t
PHL
HIGH to LOW
propagation delay
An to Bn or Bn to An; see Figure 5 2.4 3.6 4.5 2.4 5.2 ns
LEBA
to An or LEAB to Bn; see Figure 6 3.0 4.4 5.3 3.0 6.2 ns
t
PZH
OFF-state to HIGH
propagation delay
OEBA to An, OEAB to Bn; see Figure 7 1.8 3.0 3.9 1.8 4.7 ns
EBA
to An, EAB to Bn; see Figure 7 1.9 3.4 4.1 1.9 5.0 ns
t
PZL
OFF-state to LOW
propagation delay
OEBA to An, OEAB to Bn; see Figure 8 2.9 4.2 5.2 2.9 6.1 ns
EBA
to An, EAB to Bn; see Figure 8 3.1 4.6 5.5 3.1 6.5 ns
t
PHZ
HIGH to OFF-state
propagation delay
OEBA to An, OEAB to Bn; see Figure 7 2.0 3.3 4.3 2.0 4.9 ns
EBA
to An, EAB to Bn; see Figure 7 2.1 3.4 4.5 2.1 5.2 ns
t
PLZ
LOW to OFF-state
propagation delay
OEBA to An, OEAB to Bn; see Figure 8 2.0 2.8 5.8 2.0 6.3 ns
EBA
to An, EAB to Bn; see Figure 8 2.0 3.0 6.2 2.0 6.7 ns
t
su(H)
set-up time HIGH An to LEAB, Bn to LEBA; see Figure 9 3.0 1.5 - 3.0 - ns
An to EAB
, Bn to EBA; see Figure 9 3.0 1.5 - 3.0 - ns
t
su(L)
set-up time LOW An to LEAB, Bn to LEBA; see Figure 9 3.0 0.6 - 3.0 - ns
An to EAB
, Bn to EBA; see Figure 9 3.0 0.6 - 3.0 - ns
t
h(H)
hold time HIGH LEAB to An, LEBA to Bn; see Figure 9 +0.5 0.3 - 0.5 - ns
EAB
to An, EBA to Bn; see Figure 9 +0.5 0.2 - 0.5 - ns
t
h(L)
hold time LOW LEAB to An, LEBA to Bn; see Figure 9 +0.5 1.3 - 0.5 - ns
EAB
to An, EBA to Bn; see Figure 9 +0.5 1.3 - 0.5 - ns
t
WL
pulse width LOW latch enable; see Figure 9 3.5 1.8 - 3.5 - ns
Table 7. Dynamic characteristics
…continued
GND = 0 V; for test circuit, see Figure 10.
Symbol Parameter Conditions 25 C; V
CC
= 5.0 V 40 C to +85 C;
V
CC
= 5.0 V 0.5 V
Unit
Min Typ Max Min Max
V
M
=1.5V
V
OL
and V
OH
are typical voltage output levels that occur with the output load.
Fig 5. Propagation delay input (An, Bn) to output (Bn, An)
001aac759
V
OL
V
OH
V
M
V
M
t
PHL
t
PLH
V
M
V
M
An, Bn
V
I
GND
Bn, An