74LCX16245TTR datasheet(5/9 Pages) STMICROELECTRONICS

Numer części	74LCX16245TTR

Szczegółowy opis	LOW VOLTAGE CMOS 16-BIT BUS TRANSCEIVER WITH 5V TOLERANT INPUTS AND OUTPUT (3-STATE)

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74LCX16245

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AC ELECTRICAL CHARACTERISTICS

1) Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switch-

ing in the same direction, either HIGH or LOW (tOSLH =| tPLHm -tPLHn|, tOSHL =| tPHLm -tPHLn|)

2) Parameter guaranteed by design

CAPACITIVE CHARACTERISTICS

1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without

load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) =CPD xVCC xfIN +ICC/16 (per

circuit)

Symbol

Parameter

Test Conditi on

Value

Unit

VCC

(V)

CL

(pF)

RL

(

Ω)

ts = tr

(ns)

-40 to 85

°C

-55 to 125

°C

Min.

Max.

Min.

Max.

tPLH tPHL

Propagation Delay

Time

2.7

50

500

2.5

1.5

5.2

1.5

5.2

ns

3.0 to 3.6

1.5

4.5

1.5

4.5

tPZL tPZH

Output Enable Time

2.7

50

500

2.5

1.5

7.2

1.5

7.2

ns

3.0 to 3.6

1.5

6.5

1.5

6.5

tPLZ tPHZ

Output Disable Time

2.7

50

500

2.5

1.5

6.9

1.5

6.9

ns

3.0 to 3.6

1.5

6.4

1.5

6.4

tOSLH

tOSHL

Output To Output

Skew Time (note1,

2)

3.0 to 3.6

50

500

2.5

1.0

ns

Symbol

Parameter

Test Condition

Value

Unit

VCC

(V)

TA =25 °C

Min.

Typ.

Max.

CIN

Input Capacitance

3.3

VIN = 0 to VCC

7pF

COUT

Output Capacitance

3.3

VIN = 0 to VCC

8pF

CPD

Power Dissipation Capacitance

(note 1)

3.3

fIN = 10MHz

VIN = 0 or VCC

20

pF

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