4.6 Switching Characteristics

Input tr, tf = 6ns. CL = 50pF unless otherwise noted

PARAMETER

VCC (V)

25°C

– 40°C to

85°C

– 55°C to

125°C

UNIT

TYP

MAX

MAX

MAX

HC TYPES

tPLH, tPHL

CLK to Q

2

170

212

255

ns

4.5

14(3)

34

43

51

ns

6

29

36

43

ns

tPLH, tPHL

CLR to Q

2

140

175

210

ns

4.5

11(3)

28

35

42

ns

6

24

30

36

ns

tTLH, tTHL

Output transition times

2

75

110

ns

4.5

15

22

ns

6

13

19

ns

fMAX

Maximum clock frequency

5

60(3)

ns

CIN

Input capacitance

10

10

10

pF

CPD

Power dissipation capacitance(1) (2)

5

47

pF

HCT TYPES

tPLH, tPHL

CLK to Q

4.5

36

45

54

ns

5

15(3)

tPLH, tPHL

CLR to Q

4.5

38

46

57

ns

5

16(3)

tTLH, tTHL

Output Transition time

4.5

15

19

22

ns

CIN

Input Capacitance

pF

fMAX

Maximum clock frequency

54(4)

MHz

CPD

Power dissipation capacitance(1) (2)

5

49

10

10

10

pF

(1)

CPD is used to determine the dynamic power consumption, per device.

(2)

PD = VCC 2fi + Σ (CL VCC 2 + fO) where fi = Input Frequency, fO = Output Frequency, CL = Output Load Capacitance, VCC = Supply

Voltage.

(3)

CL = 15pF. VCC = 5.

(4)

CL = 15pF.

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CD54HC164, CD74HC164, CD54HCT164, CD74HCT164

SCHS155E – NOVEMBER 1998 – REVISED MAY 2024

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