©1993 Fairchild Semiconductor Corporation

www.fairchildsemi.com

74VHC4040 Rev. 1.3

6

AC Electrical Characteristics

Note:

2. CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating

current consumption without load. Average operating current can be obtained by the equation:

ICC (Opr.) = CPD • VCC • fN + ICC

AC Operating Requirements

Symbol

Parameter

VCC (V)

Conditions

TA = +25°C

TA = –40°C

to +85°C

Units

Min.

Typ.

Max.

Min.

Max.

tPLH, tPHL

Propagation Delay Time

to Q1

3.3 ± 0.3

CL = 15pF

7.5

11.9

1.0

14.0

ns

CL = 50pF

10.0

15.4

1.0

17.5

5.0 ± 0.5

CL = 15pF

4.8

7.3

1.0

8.5

ns

CL = 50pF

6.3

9.3

1.0

10.5

tPLH, tPHL

Propagation Delay Time

between Stages from

Qn to Qn+1

3.3 ± 0.3

CL = 15pF

ns

CL = 50pF

2.4

4.4

1.0

5.0

5.0 ± 0.5

CL = 15pF

ns

CL = 50pF

1.6

3.1

1.0

3.5

tPHL

Propagation Delay Time

MR–Qn

3.3 ± 0.3

CL = 15pF

8.3

12.8

1.0

15.0

ns

CL = 50pF

10.8

16.3

1.0

18.5

5.0 ± 0.5

CL = 15pF

5.6

8.6

1.0

10.0

ns

CL = 50pF

7.1

10.6

1.0

12.0

fMAX

Maximum Clock

Frequency

3.3 ± 0.3

CL = 15pF

90

140

75

MHz

CL = 50pF

55

80

50

5.0 ± 0.5

CL = 15pF

150

210

125

MHz

CL = 50pF

95

125

80

CIN

Input Capacitance

VCC = Open

4

10

10

pF

CPD

Power Dissipation

Capacitance

(2)

21

pF

Symbol

Parameter

VCC (V)

TA = 25°C

TA = –40°C

to +85°C

Units

Typ.

Guaranteed Minimum

tw(L), tw(H)

Minimum Pulse Width (CP)

3.3 ± 0.3

5.0

5.0

ns

5.0 ± 0.5

5.0

5.0

tw(L)

Minimum Pulse Width (MR)

3.3 ± 0.3

5.0

5.0

ns

5.0 ± 0.5

5.0

5.0

tREC

Minimum Removal Time (MR)

3.3 ± 0.3

5.0

5.0

ns

5.0 ± 0.5

5.0

5.0