Datasheet

74HC_HCT540 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 3 — 21 January 2013 10 of 18
NXP Semiconductors
74HC540; 74HCT540
Octal buffer/line driver; 3-state; inverting
11. Waveforms
Measurement points are given in Table 8.
V
OL
and V
OH
are typical voltage output levels that occur with the output load.
Fig 6. Input to output propagation delays
DDD
9
0
<QRXWSXW
$QLQSXW
W
7+/
W
7/+
W
3/+
9
0
W
3+/




Measurement points are given in Table 8.
V
OL
and V
OH
are typical voltage output levels that occur with the output load.
Fig 7. 3-state enable and disable times
DDD
W
3+=
RXWSXW
+,*
+WR2))
2)
)WR+,*+
RXW
SXWV
HQD
EOHG
9
0
9
0
RXWSXWV
HQDEOHG
RXWSXWV
GLVDEOHG
W
3=+
W
3=/
9
<
9
;
9
0
W
3/=
2
(QLQSXW
RXWSXW
/2
:WR2))
2)
)WR/2:
Table 8. Measurement points
Type Input Output
V
M
V
M
V
X
V
Y
74HC540 0.5V
CC
0.5V
CC
0.1V
CC
0.9V
CC
74HCT540 1.3 V 1.3 V 0.1V
CC
0.9V
CC