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Infrared Remote Control Transmitter

PT2213

PT2213 v1.2

Page 3

Written August 1999

APPLICATION CIRCUITS

SEL2 =HIGH (SEL2 connected to VDD)

1

2

3

4

33

34

35

36

5

6

7

8

37

38

39

40

9

10

11

12

41

42

43

44

13

14

15

16

45

46

47

48

17

18

19

20

49

50

51

52

21

22

23

24

53

54

55

56

25

26

27

28

57

58

59

60

29

30

31

32

61

62

63

64

PT2213

SE L 1

KO 0

KI0

KO 1

KI1

KO2

KI2

KO 3

KI3 KI4 KI5 KI6 KI7

RE M

VD D SE L 2

O S C 1

OS C 2

V S S

KO 4 KO5 KO 6 KO 7 LM P

455 KHz

C

C

+

47uF

VD D = 3 V

1K O hm s

VD D

2 O hm s

Note:

KI0 to KI7

KO0 to KO 7

Key M atrix

Tran sm issio n

Indica to r LED

Wire d

(one place for inpu t lin e)

n

n= 1 to 64

sho rt

IR

LED

N ote: The suggested value of C is 100pF to 200pF.

+

PCB Layout Notes:

1. Power Supply must first support the IC's "VDD" before the Supply IR LED "VDD".

2. It is recommended that the 47µF Capacitor must be placed between the IC's "Vss" and

"VDD".