74LVC244A データシートの表示（PDF） - NXP Semiconductors.

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74LVC244A

Octal buffer/line driver with 5-volt tolerant inputs/outputs 3-Statetitle

NXP Semiconductors. 

NXP Semiconductors

11. AC waveforms

74LVC244A; 74LVCH244A

Octal buffer/line driver; 3-state

VI

nAn input

GND

VOH

tPLH

nYn output

VOL

VM

VM

VM

tPHL

VM

mna171

Fig 6.

Measurement points are given in Table 8.

Logic levels: VOL and VOH are typical output voltage levels that occur with the output load.

The input (nAn) to output (nYn) propagation delays

VI

nOE input

GND

VCC

output

LOW-to-OFF

OFF-to-LOW

VOL

VOH

output

HIGH-to-OFF

OFF-to-HIGH

GND

VM

tPLZ

tPZL

tPHZ

VX

VY

VM

tPZH

VM

outputs

enabled

outputs

disabled

outputs

enabled

mna362

Fig 7.

Measurement points are given in Table 8.

Logic levels: VOL and VOH are typical output voltage levels that occur with the output load.

3-state enable and disable times.

Table 8. Measurement points

Supply voltage Input

VCC

1.2 V

1.65 V to 1.95 V

2.3 V to 2.7 V

2.7 V

VI

VCC

VCC

VCC

2.7 V

3.0 V to 3.6 V

2.7 V

VM

0.5  VCC

0.5  VCC

0.5  VCC

1.5 V

1.5 V

Output

VM

0.5  VCC

0.5  VCC

0.5  VCC

1.5 V

1.5 V

VX

VOL + 0.15 V

VOL + 0.15 V

VOL + 0.15 V

VOL + 0.3 V

VOL + 0.3 V

VY

VOH  0.15 V

VOH  0.15 V

VOH  0.15 V

VOH  0.3 V

VOH  0.3 V

74LVC_LVCH244A

Product data sheet

All information provided in this document is subject to legal disclaimers.

Rev. 8 — 26 June 2013

© NXP B.V. 2013. All rights reserved.

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