HT6P20F2T3 Ver la hoja de datos (PDF) - Holtek Semiconductor

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HT6P20F2T3

2(24) Encoder with ASK Transmitter

Holtek Semiconductor 

HT6P20B2T3/D2T3/F2T3

224 Encoder with ASK Transmitter

Symbol

Parameter

Test Conditions

VDD

Conditions

Min. Typ. Max. Unit

Delta between ASK input

ASK to RF Out Response Time

3V

transition from Low To High to

RF output transition from low

¾

1

¾

ms

to high

CREF Clock Output Frequency

@315MHz (fOSC=9.84MHz)

3V @433.92MHz

(fOSC=13.56MHz)

¾ 150 ¾

Hz

¾ 207 ¾

Hz

Functional Description

Normal Operation

The devices encode and transmits address/data to a decoder upon receipt of a trigger signal. The

address codes of the device are always transmitted as long as power (VDD) is supplied. The

transmission function of the device is enabled by the D0~D1 pins (active low). The following diagram

shows the transmission timing:

D0 ~ D3

E ncoder

DOUT

< 1 w o rd

> 1 w o rd

Transmission Timing

A Complete code word of the HT6P20D2T3 consists of 3 periods as shown below.

fo s c

DOUT

1 c lo c k

p ilo t p e r io d

( 2 3 c lo c k s )

1 /3 b it

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

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

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

d a ta c o d e p e r io d

A Complete Code Word for the HT6P20D2T3

0

1

0

1

a n ti- c o d e p e r io d

( 4 b its )

The device detects the logic state of the internal programmed address and the external data pins, and

then transmits the detected information during the code period. Each address/data bit can be set to one

of the following two logic states:

fo s c

"O ne"

"Z e ro "

A d d re s s /

D a ta b it

(tD W )

Rev. 1.00

5

September 13, 2010

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