HT672B View Datasheet(PDF) - Holtek Semiconductor

Part Name

Description

Manufacturer

HT672B

13.56MHz RFID Transponder

Holtek Semiconductor 

HT672B

Timing & Code Package

S y n c . D a ta

( 1 2 b its )

C u s to m e r

ID

O n e P a c k a g e F o rm a t

( 2 0 b its )

P ro d u c t

C ode

( 8 b its )

C heck

S um

Code Package

A total of 40 bits information can be stored in the HT672B,

from which 20 bits are customer programmable.

· Sync. data: Including 4 bits

(which low/high duty length is 50%)

· Mark data: 2 bits (always high signal).

· Customer ID: This 12-bit wide code is not customer

programmable and is supplied together with the data

writer after register to Holtek. The writer generates the

code automatically.

· Product code: Storing the contents of the user ID

number or data.

· Check sum: A 8 bits of checksum code is generated

automatically by the writer.

Application Circuits

Tag

A tag consists of a PCB (or Mylar film) with printed coil, HT672B and a housing. The housing can be of various shapes.

T a g H o u s in g

PCB

HF

H T672B

H F1

Note:

The value of the antenna inductance is 11mH, however the optimum value will be changed slightly due to the

variation of the internal resonance capacitor (10pF typically) during process.

For more application information about the reader, refer to Holtek¢s 13.56MHz RF ID reader data.

2-chip Solution

H o lte k T r a n s p o n d e r S o lu tio n

H o lte k R e a d e r S o lu tio n

O th e r C o n tr o lle r

E n e rg y

H T672B

ANT

D a ta

D a ta

R F osc

D ecode

ANT

&

&

R e c e iv e r

S y s te m

C o n tro l

S p e c ia l

P u rp o s e

C o n tr o lle r

H o lte k lo w c o s t M C U :

H T 4 8 R 0 5 A -1 /H T 4 8 R 0 6 A -1

Rev. 1.10

4

November 23, 2004

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