Absolute Maximum Ratings

Storage Temperature ............................

-50°Cto125°C

Operating Temperature...........................

-20°Cto75°C

Note: These are stress ratings only. Stresses exceeding the range specified under

²Absolute Maximum Ratings² may

cause substantial damage to the device. Functional operation of this device at other conditions beyond those

listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil-

ity.

Electrical Characteristics

Ta=25

°C

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

Conditions

Operating Voltage

¾¾

2

¾

12

V

Standby Current

12V

Oscillator stops

¾

12

mA

Operating Current

12V

¾

200

400

mA

²H² Input Voltage

¾¾

¾

V

²L² Input Voltage

¾¾

0

¾

V

D0~D7 Pull-high Resistance

12V

¾¾

150

300

k

W

Output Current

Source

5V

-2

-5

¾

mA

12V

-6.5

-15

¾

mA

Sink

5V

25

¾

mA

12V

615

¾

mA

Oscillator Frequency

12V

W¾

3

¾

kHz

HT6P20X Series

Rev. 1.40

3

June 20, 2003

Functional Description

Normal Operation

The HT6P20X encodes and transmits address/data to a decoder upon receipt of a trigger signal. The address codes of

the HT6P20A are always transmitted as long as power (VDD) is supplied. The transmission function of the HT6P20B/D

is enabled by the D0~D7 pins (active low). The following is the transmission timing of the HT6P20X:

A complete code word of the HT6P20D consists of 3 periods as shown below.

E n c o d e r

D O U T

< 1 w o r d

D 0 ~ D 7

> 1 w o r d

Transmission timing

a n t i - c o d e p e r i o d

( 4 b i t s )

p i l o t p e r i o d

( 2 3 c l o c k s )

a d d r e s s c o d e p e r i o d

d a t a c o d e p e r i o d

1 / 3 b i t

( A 0 ~ A 1 9 , 6 0 c l o c k s )

( D 3 ~ D 0 , 1 2 c l o c k s )

0

0

1

1

f o s c

D O U T

1 c l o c k

A complete code word for the HT6P20D