74VCXH245MTC datasheet(5/9 Pages) FAIRCHILD

Il numero della parte	74VCXH245MTC

Spiegazioni elettronici	Low Voltage Bidirectional Transceiver with Bushold

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AC Electrical Characteristics (Note 6)

Note 6: For CL 50 pF, add approximately 300 ps to the AC maximum specification.

Note 7: 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).

Dynamic Switching Characteristics

Capacitance

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

An to Bn or 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

1.2

42.0

tPZL,

Output Enable Time

CL 30 pF, RL 500:

3.3

r 0.3

0.6

4.5

ns

Figures

1, 3, 4

tPZH

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

1.2

49.0

tPLZ,

Output Disable Time

CL 30 pF, RL 500:

3.3

r 0.3

0.6

3.6

ns

Figures

1, 3, 4

tPHZ

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

1.2

36.0

tOSHL

Output to Output Skew

CL 30 pF, RL 500:

3.3

r 0.3

0.5

ns

tOSLH

(Note 7)

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

1.2

1.5

Symbol

Parameter

Conditions

VCC

TA 25qC

Units

(V)

Typical

VOLP

Quiet Output Dynamic Peak VOL

CL 30 pF, VIH VCC, VIL 0V

1.8

0.3

V

2.5

0.7

3.3

1.0

VOLV

Quiet Output Dynamic Valley VOL

CL 30 pF, VIH VCC, V IL 0V

1.8

0.3

V

2.5

0.7

3.3

1.0

VOHV

Quiet Output Dynamic Valley VOH

CL 30 pF, VIH VCC, V IL 0V

1.8

1.3

V

2.5

1.7

3.3

2.0

Symbol

Parameter

Conditions

TA 25qC

Units

Typical

CIN

Input Capacitance

VI 0V or VCC, VCC 1.8V, 2.5V or 3.3V

6

pF

CI/O

Input/Output Capacitance

VI 0V or VCC, VCC 1.8V, 2.5V or 3.3V

7

pF

CPD

Power Dissipation Capacitance

VI 0V or VCC, f 10 MHz, VCC 1.8V, 2.5V or 3.3V

20

pF

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