74ALVC245 datasheet(7/14 Pages) NXP

7 / 14 page

74ALVC245_2

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.

VOL and VOH 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

tPLH

tPHL

GND

VOH

VOL

Measurement points are given in Table 8.

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

Fig 6.

Enable and disable times

mna367

tPLZ

tPHZ

outputs

disabled

outputs

enabled

outputs

enabled

output

LOW-to-OFF

OFF-to-LOW

output

HIGH-to-OFF

OFF-to-HIGH

OE input

VOL

VOH

VCC

GND

tPZL

tPZH

Table 8.

Measurement points

Supply voltage

Input

Output

VCC

1.65 V to 1.95 V

VCC

0.5

× VCC

0.5

× VCC

VOL + 0.15 V

VOH − 0.15 V

2.3 V to 2.7 V

VCC

0.5

× VCC

0.5

× VCC

VOL + 0.15 V

VOH − 0.15 V

2.7 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

VOL + 0.3 V

VOH − 0.3 V

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