74F269_5

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Product data sheet

Rev. 05 — 25 March 2010

2 of 19

NXP Semiconductors

74F269

8-bit bidirectional binary counter

4.

Functional diagram

Fig 1.

Logic symbol

Fig 2.

IEC logic symbol

001aai979

PE

CEP

CET

U/D

CP

24

12

13

1

11

23

D0

22

D1

21

D2

20

D3

18

D4

17

D5

16

D6

15

Q0

Q1

Q2

Q3

Q4

Q5

Q6

Q7

2345689

10

D7

TC

14

001aai980

5

4

23

22

21

20

2

14

3

13

12

G6

1

M4 [DOWN]

24

G5

M3 [UP]

M1 [LOAD]

M2 [COUNT]

2, 3, 5, 6

+/C7

11

2, 3, 5, 6

−

1,7D

[1]

[2]

[4]

[8]

3, 5, 6 CT = 256

4, 5, 8 CT = 0

CTR DIV256

6

18

[16]

8

17

[32]

9

16

[64]

10

15

[128]