M74HC7245B1R 查看數據表（PDF） - STMicroelectronics

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M74HC7245B1R

TRANSCEIVER (3-STATE): HC7645 NONINVERTING HC7640 INVERTING ,HC7643 INVERTING/NON INVERTING

STMicroelectronics 

M54/M 74HC 7245/ 7640/7643/7645

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

Symbol

Parameter

Test Conditions

VCC

(V)

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 2.0

tTHL Time

4.5

25 60

75

90

7

12

15

18

ns

6.0

6

10

13

15

tPLH Propagation

2.0

tPHL Delay Time

4.5

61 125

156

190

15 25

31

38

ns

6.0

13 21

27

32

tPZL Output Enable

tPZH Time

2.0

4.5

RL = 1 KΩ

77 150

188

225

19 30

38

45

ns

6.0

16 26

32

38

tPLZ Output Disable

2.0

tPHZ Time

4.5

RL = 1 KΩ

84 150

188

225

21 30

38

45

ns

6.0

18 26

32

38

CIN Input Capacitance

5

10

10

10 pF

COUT Output

Capacitance

pF

CPD (*) Power Dissipation

Capacitance

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/4 (per Gate)

SWITCHING CHARACTERISTICS TEST WAVEFORM

VCC

GND

VCC

GND

5/10

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