Datasheet

74ALVC245_2 © NXP B.V. 2008. All rights reserved.
Product data sheet Rev. 02 — 7 January 2008 7 of 14
NXP Semiconductors
74ALVC245
Octal bus transceiver; 3-state
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 5. Propagation delay input (An, Bn) to output (Bn, An)
mna176
An, Bn input
Bn, An output
t
PLH
t
PHL
GND
V
I
V
M
V
M
V
M
V
M
V
OH
V
OL
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. Enable and disable times
mna367
t
PLZ
t
PHZ
outputs
disabled
outputs
enabled
V
Y
V
X
outputs
enabled
output
LOW-to-OFF
OFF-to-LOW
output
HIGH-to-OFF
OFF-to-HIGH
OE input
V
I
V
OL
V
OH
V
CC
V
M
GND
GND
t
PZL
t
PZH
V
M
V
M
Table 8. Measurement points
Supply voltage Input Output
V
CC
V
I
V
M
V
M
V
X
V
Y
1.65 V to 1.95 V V
CC
0.5 × V
CC
0.5 × V
CC
V
OL
+ 0.15 V V
OH
− 0.15 V
2.3 V to 2.7 V V
CC
0.5 × V
CC
0.5 × V
CC
V
OL
+ 0.15 V V
OH
− 0.15 V
2.7 V 2.7 V 1.5 V 1.5 V V
OL
+ 0.3 V V
OH
− 0.3 V
3.0 V to 3.6 V 2.7 V 1.5 V 1.5 V V
OL
+ 0.3 V V
OH
− 0.3 V