MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

1

REV 1

6/97

Dual D-Type Flip-Flop

with Set and Reset

The MC74VHC74 is an advanced high speed CMOS D–type flip–flop

fabricated with silicon gate CMOS technology. It achieves high speed

operation similar to equivalent Bipolar Schottky TTL while maintaining

CMOS low power dissipation.

The signal level applied to the D input is transferred to Q output during the

positive going transition of the Clock pulse.

Reset (RD) and Set (SD) are independent of the Clock (CP) and are

accomplished by setting the appropriate input Low.

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: fmax = 170MHz (Typ) at VCC = 5V

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

• High Noise Immunity: VNIH = VNIL = 28% VCC

• Power Down Protection Provided on Inputs

• Balanced Propagation Delays

• Designed for 2V to 5.5V Operating Range

• Low Noise: VOLP = 0.8V (Max)

• Pin and Function Compatible with Other Standard Logic Families

• Latchup Performance Exceeds 300mA

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

• Chip Complexity: 128 FETs or 32 Equivalent Gates

LOGIC DIAGRAM

RD1

D1

CP1

SD1

RD2

D2

CP2

SD2

1

2

3

4

13

12

11

10

5

6

9

8

Q1

Q1

Q2

Q2

FUNCTION TABLE

Inputs

Outputs

SD

RD

CP

D

Q

Q

LH

X

X

HL

HL

X

X

LH

L

L

X

X

H*

H*

HH

H

H

L

HH

L

L

H

H

H

L

X

No Change

H

H

H

X

No Change

H

H

X

No Change

* Both outputs will remain high as long as Set and Reset are low, but the output

states are unpredictable if Set and Reset go high simultaneously.

MC74VHC74

PIN ASSIGNMENT

SD1

CP1

D1

RD1

11

12

13

14

8

9

10

5

4

3

2

1

7

6

SD2

CP2

D2

RD2

VCC

Q2

Q2

GND

Q1

Q1

D SUFFIX

14–LEAD SOIC PACKAGE

CASE 751A–03

DT SUFFIX

14–LEAD TSSOP PACKAGE

CASE 948G–01

ORDERING INFORMATION

MC74VHCXXD

MC74VHCXXDT

MC74VHCXXM

SOIC

TSSOP

SOIC EIAJ

M SUFFIX

14–LEAD SOIC EIAJ PACKAGE

CASE 965–01