74VCX2245WM datasheet(5/12 Pages) FAIRCHILD

Il numero della parte	74VCX2245WM

Spiegazioni elettronici	Low Voltage Bidirectional Transceiver with 3.6V Tolerant Inputs and Outputs and 26W Series Resistors in B Outputs

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AC Electrical Characteristics (Note 8)

Note 8: For CL 50 pF, add approximately 300 ps to the AC maximum specification.

Note 9: Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device. The

specification applies to any outputs switching in the same direction, either HIGH-to-LOW (tOSHL) or LOW-to-HIGH (tOSLH).

Symbol

Parameter

Conditions

VCC

TA 40qC to 85qC

Units

Figure

(V)

Min

Max

Number

tPHL

Propagation Delay

CL 30 pF, RL 500:

3.3

r 0.3

0.6

3.5

ns

Figures

1, 2

tPLH

Bn to An

2.5

r 0.2

0.8

4.2

1.8

r 0.15

1.5

8.4

CL 15 pF, RL 2k:

1.5

r 0.1

1.0

16.8

Figures

5, 6

tPZL

Output Enable Time

CL 30 pF, RL 500:

3.3

r 0.3

0.6

4.5

ns

Figures

1, 3, 4

tPZH

Bn to An

2.5

r 0.2

0.8

5.6

1.8

r 0.15

1.5

9.8

CL 15 pF, RL 2k:

1.5

r 0.1

1.0

19.6

Figures

5, 7, 8

tPLZ

Output Disable Time

CL 30 pF, RL 500:

3.3

r 0.3

0.6

3.6

ns

Figures

1, 3, 4

tPHZ

Bn to An

2.5

r 0.2

0.8

4.0

1.8

r 0.15

1.5

7.2

CL 15 pF, RL 2k:

1.5

r 0.1

1.0

14.4

Figures

5, 7, 8

tOSHL

Output to Output Skew

CL 30 pF, RL 500:

3.3

r 0.3

0.5

ns

tOSLH

(Note 9)

2.5

r 0.2

0.5

1.8

r 0.15

0.75

CL 15 pF, RL 2k:

1.5

r 0.1

1.5

tPHL

Propagation Delay

CL 30 pF, RL 500:

3.3

r 0.3

0.6

4.4

ns

Figures

1, 2

tPLH

An to Bn

2.5

r 0.2

0.8

5.6

1.8

r 0.15

1.5

9.8

CL 15 pF, RL 2k:

1.5

r 0.1

1.0

19.6

Figures

5, 6

tPZL

Output Enable Time

CL 30 pF, RL 500:

3.3

r 0.3

0.6

5.0

ns

Figures

1, 3, 4

tPZH

An to Bn

2.5

r 0.2

0.8

6.6

1.8

r 0.15

1.5

9.8

CL 15 pF, RL 2k:

1.5

r 0.1

1.0

19.6

Figures

5, 7, 8

tPLZ

Output Disable Time

CL 30 pF, RL 500:

3.3

r 0.3

0.6

4.2

ns

Figures

1, 3, 4

tPHZ

An to Bn

2.5

r 0.2

0.8

4.7

1.8

r 0.15

1.5

8.5

CL 15 pF, RL 2k:

1.5

r 0.1

1.0

16.9

Figures

5, 7, 8

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