Nexperia

74LVC245A; 74LVCH245A

Octal bus transceiver; 3-state

10.1. Waveforms and test circuit

mna176

An, Bn input

Bn, An output

tPLH

tPHL

GND

VI

VM

VM

VM

VM

VOH

VOL

See Table 8 for measurement points.

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

Fig. 6. Input (An, Bn) to output (Bn, An) propagation delays and output transition times

mna367

tPLZ

tPHZ

outputs

disabled

outputs

enabled

VY

VX

outputs

enabled

output

LOW-to-OFF

OFF-to-LOW

output

HIGH-to-OFF

OFF-to-HIGH

OE input

VI

VOL

VOH

VCC

VM

GND

GND

tPZL

tPZH

VM

VM

See Table 8 for measurement points.

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

Fig. 7. Enable and disable times

Table 8. Measurement points

Supply voltage

Input

Output

VCC

VM

VI

VM

VX

VY

1.2 V

0.5 × VCC

VCC

0.5 × VCC

VOL + 0.15 V

VOH - 0.15 V

1.65 V to 1.95 V

0.5 × VCC

VCC

0.5 × VCC

VOL + 0.15 V

VOH - 0.15 V

2.3 V to 2.7 V

0.5 × VCC

VCC

0.5 × VCC

VOL + 0.15 V

VOH - 0.15 V

2.7 V

1.5 V

2.7 V

1.5 V

VOL + 0.3 V

VOH - 0.3 V

3.0 V to 3.6 V

1.5 V

2.7 V

1.5 V

VOL + 0.3 V

VOH - 0.3 V

74LVC_LVCH245A

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© Nexperia B.V. 2021. All rights reserved

Product data sheet

Rev. 12 — 16 September 2021

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