MC74VHCT240A

http://onsemi.com

2

Figure 1. Logic Diagram

DATA

INPUTS

A1

A2

A3

A4

B1

B2

B3

B4

17

15

13

11

8

6

4

218

16

14

12

9

7

5

3

YB4

YB3

YB2

YB1

YA4

YA3

YA2

YA1

INVERTING

OUTPUTS

OUTPUT

ENABLES

OEA

OEB

1

19

Figure 2. Pin Assignment

A3

A2

YB4

A1

OEA

GND

YB1

A4

YB2

YB3

5

4

3

2

1

10

9

8

7

6

14

15

16

17

18

19

20

11

12

13

YA2

B4

YA1

OEB

B1

YA4

B2

YA3

B3

OEA, OEB

A, B

YA, YB

L

L

H

L

H

X

H

L

Z

INPUTS

OUTPUTS

FUNCTION TABLE

MAXIMUM RATINGS

Symbol

Parameter

Value

Unit

DC Supply Voltage

– 0.5 to + 7.0

V

DC Input Voltage

– 0.5 to + 7.0

V

DC Output Voltage

Output in 3−State

High or Low State

– 0.5 to + 7.0

V

Input Diode Current

− 20

mA

± 20

mA

DC Output Current, per Pin

± 25

mA

± 75

mA

Power Dissipation in Still Air,

SOIC Packages†

TSSOP Package†

500

450

mW

Storage Temperature

– 65 to + 150

_C

Maximum ratings are those values beyond which device damage can occur. Maximum ratings

applied to the device are individual stress limit values (not normal operating conditions) and are

not valid simultaneously. If these limits are exceeded, device functional operation is not implied,

damage may occur and reliability may be affected.

†Derating − SOIC Packages: – 7 mW/_C from 65_ to 125_C

TSSOP Package: − 6.1 mW/_C from 65_ to 125_C

RECOMMENDED OPERATING CONDITIONS

Symbol

Parameter

Min

Max

Unit

DC Supply Voltage

4.5

5.5

V

DC Input Voltage

0

5.5

V

DC Output Voltage

Output in 3−State

High or Low State

0

0

5.5

V

Operating Temperature

− 40

+ 85

_C

Input Rise and Fall Time

0

20

ns/V

This device contains protection

circuitry to guard against damage

due to high static voltages or electric

fields. However, precautions must

be taken to avoid applications of any

voltage higher than maximum rated

voltages to this high−impedance cir-

Unused inputs must always be

tied to an appropriate logic voltage

Unused outputs must be left open.