74HC_HCT273

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Product data sheet

Rev. 4 — 10 June 2013

4 of 21

NXP Semiconductors

74HC273; 74HCT273

Octal D-type flip-flop with reset; positive-edge trigger

5.

Pinning information

5.1 Pinning

5.2 Pin description

(1) This is not a supply pin. The substrate is attached to this

pad using conductive die attach material. There is no

electrical or mechanical requirement to solder this pad.

However, if it is soldered, the solder land should remain

floating or be connected to GND.

Fig 5.

Pin configuration DIP20, SO20, SSOP20 and

TSSOP20

Fig 6.

Pin configuration DHVQFN20

74HC273

74HCT273

MR

Q0

Q7

D0

D7

D1

D6

Q1

Q6

Q2

Q5

D2

D5

D3

D4

Q3

Q4

GND

CP

001aae053

1

2

3

4

5

6

7

8

9

10

12

11

14

13

16

15

18

17

20

19

001aae054

74HC273

74HCT273

Transparent top view

Q4

D3

Q3

D4

D2

D5

Q2

Q5

Q1

Q6

D1

D6

D0

D7

Q0

Q7

9

12

8

13

7

14

6

15

5

16

4

17

3

18

2

19

terminal 1

index area

Table 2.

Pin description

Symbol

Pin

Description

MR

1

master reset input (active LOW)

Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7

2, 5, 6, 9, 12, 15, 16, 19

flip-flop output

D0, D1, D2, D3, D4, D5, D6, D7

3, 4, 7, 8, 13, 14, 17, 18

data input

GND

10

ground (0 V)

CP

11

clock input (LOW-to-HIGH, edge-triggered)

20

supply voltage