5.6 Switching Characteristics

Input tr, tf = 6 ns. Unless otherwise specified, CL = 50pF. See (Parameter Measurement Information)

PARAMETER

VCC (V)

25

℃

-40

℃ to

85

℃

-55

℃ to

125

℃

UNIT

TYP

MAX

MAX

MAX

HC TYPES

tpd

Clock to output

2

160

200

240

ns

4.5

13(3)

32

40

48

ns

6

27

34

41

ns

tt

Output transition time

2

75

95

110

ns

4.5

15

19

22

ns

6

13

16

19

ns

tPHL

Propagation delay MR to output

2

160

200

240

ns

4.5

32

40

48

ns

6

27

34

41

ns

CI

Input capacitance

10

10

10

pF

CPD

Power dissipation capacitance(1)

(2)

5

41

pF

HCT TYPES

tpd

Clock to output

4.5

40

50

60

ns

tt

Output transition time

4.5

15

19

22

ns

tPHL

Propagation delay

MR to output

4.5

40

50

60

ns

CI

Input capacitance

10

10

10

pF

(1)

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

(2)

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

Voltage.

(3)

CL = 15 and VCC = 5 V.

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CD54HC166, CD54HCT166, CD74HC166, CD74HCT166

SCHS157D – FEBRUARY 1998 – REVISED FEBRUARY 2022

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