74LVC8T245 datasheet(13/28 Pages) NEXPERIA

tên linh kiện	74LVC8T245

Giải thích chi tiết về linh kiện	8-bit dual supply translating transceiver; 3-state

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74LVC_LVCH8T245

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

Product data sheet

Rev. 3 — 12 December 2011

13 of 28

Nexperia

74LVC8T245; 74LVCH8T245

8-bit dual supply translating transceiver; 3-state

11. Waveforms

[1]

VCCI is the supply voltage associated with the data input port.

[2]

VCCO is the supply voltage associated with the output port.

Measurement points are given in Table 13.

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

Fig 5.

The data input (An, Bn) to output (Bn, An) propagation delay times

001aai475

An, Bn input

GND

VOH

Bn, An output

VOL

tPHL

tPLH

Measurement points are given in Table 13.

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

Fig 6.

Enable and disable times

001aai474

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

VCCO

GND

tPZL

tPZH

Table 13.

Measurement points

Supply voltage

Input[1]

Output[2]

VCC(A), VCC(B)

1.2 V to 1.6 V

0.5VCCI

0.5VCCO

VOL +0.1 V

VOH  0.1 V

1.65 V to 2.7 V

0.5VCCI

0.5VCCO

VOL +0.15V

VOH  0.15 V

3.0 V to 5.5 V

0.5VCCI

0.5VCCO

VOL +0.3 V

VOH  0.3 V

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