MC74AC643 MC74ACT643

5-5

FACT DATA

AC CHARACTERISTICS (For Figures and Waveforms — See Section 3)

Symbol

Parameter

VCC*

(V)

74ACT

74ACT

Unit

Fig.

No.

Symbol

Parameter

VCC*

(V)

TA = +25°C

CL = 50 pF

TA = –40°C

to +85

°C

CL = 50 pF

Unit

Fig.

No.

Min

Typ

Max

Min

Max

tPLH

Propagation Delay

An to Bn or Bn to An

5.0

1.5

8.0

1.0

9.0

ns

3-5

tPLH

An to Bn or Bn to An

5.0

1.5

8.0

1.0

9.0

ns

3-5

tPHL

Propagation Delay

An to Bn or Bn to An

5.0

1.5

8.0

1.0

9.0

ns

3-5

tPHL

An to Bn or Bn to An

5.0

1.5

8.0

1.0

9.0

ns

3-5

tPZH

Output Enable Time

5.0

1.5

10.5

1.0

11.5

ns

3-7

tPZL

Output Enable Time

5.0

1.5

10.5

1.0

11.5

ns

3-8

tPHZ

Output Disable Time

5.0

1.5

10.5

1.0

11.5

ns

3-7

tPLZ

Output Disable Time

5.0

1.5

10.5

1.0

11.5

ns

3-8

* Voltage Range 5.0 V is 5.0 V

±0.5 V.

CAPACITANCE

Symbol

Parameter

Value

Typ

Unit

Test Conditions

CIN

Input Capacitance

4.5

pF

VCC = 5.0 V

CI/O

Input/Output Capacitance

15

pF

VCC = 5.0 V

CPD

Power Dissipation Capacitance

45

pF

VCC = 5.0 V