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Infrared Remote Control Transmitter

PT2213

PT2213 v1.2

Page 4

Written August 1999

SEL2 =HIGH (SEL2 connected to VSS)

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PT2213

SEL 1

KO0

KI0

KO 1

KI1

KO2

KI2

KO 3

KI3 KI4 KI5 KI6 KI7

REM

VDD SEL 2

O S C 1

OS C2

V SS

KO4 KO5 KO6 KO7 LMP

45 5 K H z

C

C

1K O h m s

VD D

Note :

KI0 to KI7

KO 0 to K O 7

Ke y M atrix

Tra ns m issio n

In dic ator L E D

Wired

(one pla ce for in put lin e)

n

n=1 to 64

KO 0 TO KO7

SEL 1

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

+

47uF

VD D= 3V

2 O h m s

IR

LED

+

PCB Layout Notes:

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

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

"VDD".