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74LVCH244A Scheda tecnica(PDF) 9 Page - NXP Semiconductors

Il numero della parte 74LVCH244A
Spiegazioni elettronici  Octal buffer/line driver; 3-state
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Produttore elettronici  NXP [NXP Semiconductors]
Homepage  http://www.nxp.com
Logo NXP - NXP Semiconductors

74LVCH244A Scheda tecnica(HTML) 9 Page - NXP Semiconductors

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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: VOL and VOH 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
tPLH
tPHL
GND
VI
VM
VM
VM
VM
VOH
VOL
Measurement points are given in Table 8.
Logic levels: VOL and VOH are typical output voltage levels that occur with the output load.
Fig 7.
3-state enable and disable times.
mna362
tPLZ
tPHZ
outputs
disabled
outputs
enabled
VY
VX
outputs
enabled
output
LOW-to-OFF
OFF-to-LOW
output
HIGH-to-OFF
OFF-to-HIGH
nOE input
VI
VOL
VOH
VCC
VM
GND
GND
tPZL
tPZH
VM
VM
Table 8.
Measurement points
Supply voltage
Input
Output
VCC
VI
VM
VM
VX
VY
1.2 V
VCC
0.5
 V
CC
0.5
 V
CC
VOL + 0.15 V
VOH  0.15 V
1.65 V to 1.95 V
VCC
0.5
 V
CC
0.5
 V
CC
VOL + 0.15 V
VOH  0.15 V
2.3 V to 2.7 V
VCC
0.5
 V
CC
0.5
 V
CC
VOL + 0.15 V
VOH  0.15 V
2.7 V
2.7 V
1.5 V
1.5 V
VOL + 0.3 V
VOH  0.3 V
3.0 V to 3.6 V
2.7 V
1.5 V
1.5 V
VOL + 0.3 V
VOH  0.3 V


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