74VHC245M Просмотр технического описания (PDF) - STMicroelectronics

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74VHC245M

OCTAL BUS TRANSCEIVER (3-STATE)

STMicroelectronics 

74VHC245

AC ELECTRICAL CHARACTERISTICS (Input tr = tf = 3ns)

Test Condition

Value

Symbol

Parameter

VCC CL

(V) (pF)

TA = 25°C

Min. Typ. Max.

tPLH Propagation Delay 3.3(*) 15

5.8

tPHL Time

3.3(*) 50

8.3

5.0(**) 15

4.0

5.0(**) 50

5.5

tPZL

tPZH

Output Disable

Time

3.3(*) 15

3.3(*) 50

RL = 1KΩ

RL = 1KΩ

8.5

11.0

5.0(**) 15 RL = 1KΩ

5.8

5.0(**) 50 RL = 1KΩ

7.3

tPLZ

tPHZ

Output Enable

Time

3.3(*) 50

5.0(**) 50

RL = 1KΩ

RL = 1KΩ

11.5

7.0

tOSLH

tOSHL

Output to Output 3.3(*) 50

Skew time (note 1) 5.0(**) 50

(*) Voltage range is 3.3V ± 0.3V

(**) Voltage range is 5.0V ± 0.5V

Note 1 : Parameter guaranteed by design. tsoLH = |tpLHm - tpLHn|, tsoHL = |tpHLm - tpHLn|

8.4

11.9

5.5

7.5

13.2

16.7

8.5

10.6

15.8

9.7

1.5

1.0

-40 to 85°C -55 to 125°C

Min. Max. Min. Max.

1.0 10.0 1.0 10.0

1.0 13.5 1.0 13.5

1.0 6.5 1.0 6.5

1.0 8.5 1.0 8.5

1.0 15.5 1.0 15.5

1.0 19.0 1.0 19.0

1.0 10.0 1.0 10.0

1.0 12.0 1.0 12.0

1.0 18.0 1.0 18.0

1.0 11.0 1.0 11.0

1.5

1.5

1.0

1.0

Unit

ns

ns

ns

ns

CAPACITIVE CHARACTERISTICS

Test Condition

Value

Symbol

Parameter

TA = 25°C

-40 to 85°C -55 to 125°C Unit

Min. Typ. Max. Min. Max. Min. Max.

CIN Input Capacitance

4 10

10

10 pF

CI/O

Output

Capacitance

8

pF

CPD Power Dissipation

Capacitance

21

pF

(note 1)

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 x VCC x fIN + ICC/8 (per circuit)

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