M74HCT643C1R Просмотр технического описания (PDF) - STMicroelectronics

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производитель

M74HCT643C1R

HCT640 INVERTING, HCT643 INVERTING/NON INVERTING OCTAL BUS TRANSCEIVER (3-STATE): HCT245 NON INVERTING

STMicroelectronics 

M54/M74HCT245/640/643

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

Symbol

Parameter

Test Conditions

VCC CL

(V) (pF)

TA = 25 oC

54HC and 74HC

Value

-40 to 85 oC -55 to 125 oC Unit

74HC

54HC

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

tTLH Output Transition 4.5 50

tTHL Time

tPLH Propagation

tPHL Delay Time

4.5 50

4.5 150

7

12

15

18

ns

13 22

28

33

ns

18 30

38

45

ns

tPZL Output Enable

4.5 50 RL = 1KΩ

19 30

38

45

ns

tPZH Time

4.5 150 RL = 1KΩ

24 38

48

57

ns

tPLZ Output Disable

tPHZ Time

4.5 50 RL = 1KΩ

17 30

38

45

ns

CIN

CI/OUT

Input Capacitance

Output

Capacitance

DIR, G

An, Bn

5

10

10

10 pF

13

pF

CPD (*) Power Dissipation

HCT245

41

Capacitance

HCT640/643

39

pF

(*) 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 operting current can be obtained by the following equation. ICC(opr) = CPD •VCC •fIN + ICC/8 (per circuit)

SWITCHING CHARACTERISTICS TEST WAVEFORM

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