74HC_HCT74

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Product data sheet

Rev. 4 — 27 August 2012

2 of 21

NXP Semiconductors

74HC74; 74HCT74

Dual D-type flip-flop with set and reset; positive edge-trigger

4.

Functional diagram

74HC74PW

40 C to +125 C

TSSOP14

plastic thin shrink small outline package; 14 leads;

body width 4.4 mm

SOT402-1

74HCT74PW

74HC74BQ

40 C to +125 C

DHVQFN14

plastic dual in-line compatible thermal enhanced very

thin quad flat package; no leads; 14 terminals;

body 2.5

 3  0.85 mm

SOT762-1

74HCT74BQ

Table 1.

Type number

Package

Temperature range

Name

Description

Version

Fig 1.

Logic symbol

Fig 2.

IEC logic symbol

Fig 3.

Functional diagram

mna418

RD

FF

SD

410

Q

1Q

2Q

1Q

2Q

5

9

2

12

3

11

6

8

Q

1SD

CP

2CP

1CP

2D

1D

D

2SD

113

1RD 2RD

mna419

6

3

2

C1

4

S

1D

1

R

5

8

11

12

C1

10

S

1D

13

R

9

RD

FF

SD

4

Q

1Q

1Q

5

2

3

6

Q

1SD

CP

1CP

1D

D

1

1RD

mna420

RD

FF

SD

10

Q

2Q

2Q

9

12

11

8

Q

2SD

CP

2CP

2D

D

13

2RD

Fig 4.

Logic diagram for one flip-flop

mna421

SD

CP

RD

D

C

C

Q

C

C

C

C

C

C

Q

C

C