HT6221A 데이터 시트보기 (PDF) - Holtek Semiconductor

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HT6221A

Multi-Purpose Encoders

Holtek Semiconductor 

HT6220A/HT6221A/HT6221B/HT6222A

K 2 1 In p u t

K 21

K m In p u t

Km

DOUT

36m s

36m s

t>126m s

K 2 1 c o d e tr a n s m is s io n

1 0 8 m s ( m in .)

K 21+K m code

tr a n s m is s io n

Note: Km can be one of K22~K24

Timing 6. Valid Double-Key Input

DOUT and IR LED

After the transmission codes are sent, the DOUT pin

generates transmission codes with a carrier, and the

IR-LED goes low to drive a transmission indicator. The

DOUT pin abbreviate exterior transistor, to provide large

current driving ability.

IRC

The frequency of the internal RC(IRC) oscillator is de-

pending on the temperature and operating voltage.

At Ta=25°C at 3.0V, the IRC has an accuracy of ±1 per

cent. In the range of 0°C to 70°C at 2.0V~3.6V, the accu-

racy value of the RC frequency increases to the maxi-

mum value of ±2 per cent.

Application Circuits

HT6220A Application Circuit

V DD

7

D7

200kW ´5

4 7 m F /1 6 V

330W

In fra re d

LE D

4 .7 W

6

VDD

H T6220A

5

DOUT

VSS 8

C 1 C 2 C 3 C 4 C 5 R 1 R 2 R 3 R 4 R 5 R 6 A IN

13 12 11 10 9

15 16 1

2

3

4

14

Rev. 1.10

K 1 K 5 K 9 K 13 K 17

K 2 K 6 K 10 K 14 K 18

K 3 K 7 K 11 K 15 K 19

K 4 K 8 K 12 K 16 K 20

K 33 K 37 K 41 K 45 K 49

K 34 K 38 K 42 K 46 K 50

1N 4148´5

Note: Typical infrared diode: EL-1L2 (KODENSHI CORP.)

9

June 1, 2010

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