74LVC2T45GD datasheet(15/36 Pages) PHILIPS

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74LVC_LVCH2T45

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Product data sheet

Rev. 4 — 20 August 2010

15 of 36

NXP Semiconductors

74LVC2T45; 74LVCH2T45

Dual supply translating transceiver; 3-state

[1]

tPZH and tPZL are calculated values using the formula shown in Section 14.4 “Enable times”.

12. Waveforms

tPZH

OFF-statetoHIGH

propagation delay

DIR to A

[1]

26.1

20.9

13.5

12.6

9.3

DIR to B

[1]

22.4

20.8

12.4

10.1

8.4

tPZL

OFF-state to LOW

propagation delay

DIR to A

[1]

31.0

25.5

15.8

13.2

10.2

DIR to B

[1]

22.9

19.5

12.9

11.0

9.9

Table 13.

Dynamic characteristics for temperature range

−40 °C to +125 °C …continued

Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 9; for wave forms see Figure 7 and Figure 8.

Symbol Parameter

Conditions

VCC(B)

Unit

1.5 V

± 0.1 V 1.8 V ± 0.15 V 2.5 V ± 0.2 V 3.3 V ± 0.3 V 5.0 V ± 0.5 V

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Measurement points are given in Table 14.

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

Fig 7.

The data input (A, B) to output (B, A) propagation delay times

001aaj644

nA, nB input

nB, nA output

tPLH

tPHL

GND

VOH

VOL

Measurement points are given in Table 14.

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

Fig 8.

Enable and disable times

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tPZL

tPZH

tPHZ

tPLZ

GND

VCCO

VOL

VOH

outputs

disabled

outputs

enabled

outputs

enabled

output

LOW-to-OFF

OFF-to-LOW

output

HIGH-to-OFF

OFF-to-HIGH

DIR input

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