HT2X_SDS

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Product short data sheet

COMPANY PUBLIC

Rev. 3.1 — 3 November 2014

210431

3 of 9

NXP Semiconductors

HT2x

HITAG 2 transponder IC

6.

Block diagram

The HITAG 2 transponder IC requires no external power supply. The contactless interface

generates the power supply and the system clock via the resonant circuitry by inductive

coupling to the RWD. The interface also demodulates data transmitted from the RWD to

the HITAG 2 transponder IC, and modulates the magnetic field for data transmission from

the HITAG 2 transponder IC to the RWD.

Data are stored in a non-volatile memory (EEPROM). The memory has a capacity of

256 bit and is organized in pages.

Fig 1.

Block diagram of HITAG 2 transponder IC

001aao244

CLK

MOD

DEMOD

VREG

VDD

data

in

data

out

clock

R/W

ANALOGUE

RF INTERFACE

PAD

PAD

RECT

Cres

DIGITAL CONTROL

TRANSPONDER

READ/WRITE

CONTROL

ACCESS CONTROL

EEPROM INTERFACE

CONTROL

RF INTERFACE

CONTROL

EEPROM

SEQUENCER

CHARGE PUMP