For instrument or mC use

* The IC substrate should be connected to VDD in the PCB layout artwork.

To drive SK,DI and HK with a CMOS output structure, a voltage divider is needed (R=4.3kW, R1=10kW).

HT1611C

Rev. 1.10

10

August 17, 2001

SK

TI M E R

327 68H z

8 / 1 0 - D ig it L C D

CO M SEG

CO M

SEG CO M

30

2

13

1

S1

S2

1. 5V

H T 1611C

1

26

2

27

3

28

4

29

5

30

6

31

7

32

8

33

9

34

10

35

11

36

12

37

13

38

14

39

40

16

41

17

42

18

43

19

44

20

45

21

46

22

47

23

48

24

49

25

50

15

DO C L O C K

VD D

5V

VS S

In s t r um e n t o r m C S yst e m

R1

R

R1

R

R1

R

+

HK

12/ 2 4

DI

HK

0. 1 m F

0. 1 m F