M74HCT643 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

M74HCT643

OCTAL BUS TRANSCEIVER WITH 3 STATE OUTPUTS (INVERTED/NON INVERTED)

STMicroelectronics 

M74HCT643

AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6ns)

Test Condition

Value

Symbol

Parameter

tTLH tTHL Output Transition

Time

tPLH tPHL Propagation Delay

Time

tPZL tPZH High Impedance

Output Enable

Time

tPLZ tPHZ High Impedance

Output Disable

Time

VCC CL

(V) (pF)

4.5 50

50

4.5

150

50

4.5

150

4.5 50

RL = 1 KΩ

RL = 1 KΩ

RL = 1 KΩ

TA = 25°C

-40 to 85°C -55 to 125°C Unit

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

7 12

15

18 ns

13 22

28

33

ns

18 30

38

45

19 30

38

45

ns

24 38

48

57

17 30

38

45 ns

CAPACITIVE CHARACTERISTICS

Test Condition

Value

Symbol

Parameter

VCC

(V)

TA = 25°C

-40 to 85°C -55 to 125°C Unit

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

CIN Input Capacitance

DIR, G

5 10

10

10 pF

CI/OUT

Output

Capacitance

An, Bn

13

pF

CPD Power Dissipation

Capacitance (note

37

pF

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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