MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

1

REV 0

4/99

Quad 2-Input NOR Gate

The MC74VHCT02A is an advanced high speed CMOS 2–input NOR gate

fabricated with silicon gate CMOS technology. It achieves high speed

operation similar to equivalent Bipolar Schottky TTL while maintaining

CMOS low power dissipation.

The VHCT inputs are compatible with TTL levels. This device can be used

as a level converter for interfacing 3.3V to 5.0V, because it has full 5V CMOS

level output swings.

The VHCT02A input structures provide protection when voltages between

0V and 5.5V are applied, regardless of the supply voltage. The output

structures also provide protection when VCC = 0V. These input and output

structures help prevent device destruction caused by supply voltage –

input/output voltage mismatch, battery backup, hot insertion, etc.

The internal circuit is composed of three stages, including a buffer output

which provides high noise immunity and stable output. The inputs tolerate

voltages up to 7V, allowing the interface of 5V systems to 3V systems.

• High Speed: tPD = 3.6ns (Typ) at VCC = 5 V

• Low Power Dissipation: ICC = 2µA (Max) at TA = 25°C

• TTL–Compatible Inputs: VIL = 0.8V; VIH = 2.0V

• Power Down Protection Provided on Inputs

• Balanced Propagation Delays

• Designed for 2V to 5.5V Operating Range

• Low Noise: VOLP = 0.8 V (Max)

• Pin and Function Compatible with Other Standard Logic Families

• Latchup Performance Exceeds 300mA

• ESD Performance: HBM > 2000V; Machine Model > 200V

• Chip Complexity: 40 FETs or 10 Equivalent Gates

LOGIC DIAGRAM

1

Y1

2

A1

3

B1

Y4

Y = A + B

4

Y2

5

A2

6

B2

10

Y3

8

A3

9

B3

13

11

A4

12

B4

FUNCTION TABLE

A

L

L

H

H

Inputs

Output

B

L

H

L

H

Y

H

L

L

L

MC74VHCT02A

PIN ASSIGNMENT

11

12

13

14

8

9

10

5

4

3

2

1

7

6

Y3

A4

B4

Y4

VCC

A3

B3

Y2

B1

A1

Y1

GND

B2

A2

D SUFFIX

14–LEAD SOIC PACKAGE

CASE 751A–03

DT SUFFIX

14–LEAD TSSOP PACKAGE

CASE 948G–01

ORDERING INFORMATION

MC74VHCTXXAD

MC74VHCTXXADT

MC74VHCTXXAM

SOIC

TSSOP

SOIC EIAJ

M SUFFIX

14–LEAD SOIC EIAJ PACKAGE

CASE 965–01