74CBTLV3244 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2016. All rights reserved.
Product data sheet Rev. 3 — 8 November 2016 9 of 19
NXP Semiconductors
74CBTLV3244
8-bit bus switch with 4-bit output enables
10. Dynamic characteristics
[1] All typical values are measured at T
amb
=25C and at nominal V
CC
.
[2] The propagation delay is the calculated RC time constant of the typical on-state resistance of the switch and the load capacitance, when
driven by an ideal voltage source (zero output impedance).
[3] t
pd
is the same as t
PLH
and t
PHL
.
[4] t
en
is the same as t
PZH
and t
PZL
.
[5] t
dis
is the same as t
PHZ
and t
PLZ
.
11. Waveforms
Table 8. Dynamic characteristics
GND = 0 V; for test circuit see Figure 17
Symbol Parameter Conditions T
amb
= 40 C to +85 C T
amb
= 40 C to +125 C Unit
Min Typ
[1]
Max Min Max
t
pd
propagation delay nAn to nBn or nBn to
nAn; see Figure 15
[2][3]
V
CC
= 2.3 V to 2.7 V - - 0.13 - 0.20 ns
V
CC
= 3.0 V to 3.6 V - - 0.20 - 0.31 ns
t
en
enable time nOE to nAn or nBn;
see Figure 16
[4]
V
CC
= 2.3 V to 2.7 V 1.0 3.0 5.0 1.0 7.0 ns
V
CC
= 3.0 V to 3.6 V 1.0 2.6 4.3 1.0 6.0 ns
t
dis
disable time nOE to nAn or nBn;
see Figure 16
[5]
V
CC
= 2.3 V to 2.7 V 1.0 2.6 5.5 1.0 7.5 ns
V
CC
= 3.0 V to 3.6 V 1.0 3.2 5.5 1.0 7.5 ns
Measurement points are given in Table 9.
Logic levels: V
OL
and V
OH
are typical output voltage levels that occur with the output load.
Fig 15. The data input (nAn, nBn) to output (nBn, nAn) propagation delay times
DDN
9
0
9
0
9
0
9
0
9
,
Q$QQ%QLQSXW
*1'
9
2+
Q%QQ$QRXWSXW
9
2/
W
3+/
W
3/+
Table 9. Measurement points
Supply voltage Input Output
V
CC
V
M
V
I
t
r
= t
f
V
M
V
X
V
Y
2.3 V to 2.7 V 0.5V
CC
V
CC
2.0 ns 0.5V
CC
V
OL
+0.15V V
OH
0.15 V
3.0 V to 3.6 V 0.5V
CC
V
CC
2.0 ns 0.5V
CC
V
OL
+0.3V V
OH
0.3 V
