Datasheet

74LVC_LVCH244A All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 8 — 26 June 2013 9 of 19
NXP Semiconductors
74LVC244A; 74LVCH244A
Octal buffer/line driver; 3-state
11. AC waveforms
Measurement points are given in Table 8.
Logic levels: V
OL
and V
OH
are typical output voltage levels that occur with the output load.
Fig 6. The input (nAn) to output (nYn) propagation delays
mna171
nAn input
nYn 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.
Logic levels: V
OL
and V
OH
are typical output voltage levels that occur with the output load.
Fig 7. 3-state enable and disable times.
mna362
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
nOE 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
1.2 V V
CC
0.5  V
CC
0.5  V
CC
V
OL
+ 0.15 V V
OH
 0.15 V
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