HT2DC20S20/F,122 - NXP Semiconductors

DATA SH EET

Product speciﬁcation

Supersedes data of 1998 Mar 01

File under Integrated Circuits, IC11

2001 Oct 01

INTEGRATED CIRCUITS

HT2DC20S20

HITAG 2 stick transponder

2001 Oct 01 2

Philips Semiconductors Product speciﬁcation

HITAG 2 stick transponder HT2DC20S20

FEATURES

•Identification transponder for use in contactless

applications

•Operating frequency 125 kHz

•Data transmission and supply energy via RF link,

no internal battery

•Reading distance same as writing distance

•Non-volatile memory of 256 bits (128 bits user data,

128 bits control data and secret memory) organized in

8 pages, 4 bytes each

•Ten years non-volatile data retention

•More than 100000 erase/write cycles

•Selective read/write protection of memory content

•Two coding schemes for read operation: biphase and

Manchester coding

•Effective communication protocol with outstanding data

integrity check

•Mutual authentication function

•Read/write mode allows:

– Plain data transmission (password check)

– Encrypted data transmission (crypto mode).

•Inread/writemodemulti-tagoperationpossiblebecause

of special HALT function

•Emulationof standardindustrial read-onlytransponders:

– Public mode A (64 bits read-only)

– Public mode B (according to ISO 11785 for animal

identification)

– Public mode C (PIT compatible mode).

•Special features:

– User defined write protection

– Unique 32-bit serial number for each transponder

– Read-only emulation function

– Encrypted data transmission possible.

GENERAL DESCRIPTION

The HITAG(1) stick transponder HT2DC20S20 is a high

performance transponder for bi-directional transmission in

full-duplex between the read and write device and the

transponder.

Data is stored in the transponder in a non-volatile memory

(EEPROM).

The transponder requires no internal power supply; it

derives its power from the magnetic component of the

RF carrier frequency generated by the reader. Data is

transmitted by modulating this carrier.

The HT2DC20S20 is dedicated for use in secure access

systems where the transponder and the reader have to

identify each other. The choosable use of cryptography

enables highest data security. Providing several operating

modes (password, crypto and standard read-only modes)

the versatile transponder can be used in various

applications.

The HALT command can be used after finishing data

exchange to reach the halt state. In this state the

transponder is muted. This feature can be used to have

steady RF field where single transponders are collected

one by one. Each transponder is operated and then

disabled,so itdoesnot interferewith thenexttransponder.

The HALT state can only be exited by switching off and

removing the magnetic field.

The EEPROM has a capacity of 256 bits and is organized

in 8 pages of 4 bytes. The 8 pages are split up into

4 pages containing user data and into 4 pages for control

of the memory access and for authentication purposes.

The pages of the transponder memory can be protected

against read and write access by setting corresponding

memory flags.

Data transmission from the HT2DC20S20 to the reader

uses Manchester or biphase coding and Amplitude Shift

Keying (ASK) modulation. Absorption modulation is used

to transmit data from the transponder to the reader. The

transponder absorbs the magnetic field which hence

modulates the current in the reader antenna.

Data transmission from the reader to the HT2DC20S20

uses Binary Pulse Length Modulation (BPLM).

(1) HITAG - is a trademark of Philips Semiconductors

Gratkorn GmbH.

2001 Oct 01 3

Philips Semiconductors Product speciﬁcation

HITAG 2 stick transponder HT2DC20S20

QUICK REFERENCE DATA

ORDERING INFORMATION

SYMBOL PARAMETER MIN. TYP. MAX. UNIT

f0resonant frequency 121 125 129 kHz

ftrans data transfer rate

transponder to reader −4.0 −kbits/s

reader to transponder −5.2 −kbits/s

M memory

size −256 −bits

organization −8−pages

N encrypted mutual authentication bits

serial number −32 −bits

secret key −48 −bits

taut authentication time −36 −ms

TYPE

NUMBER PACKAGE

NAME DESCRIPTION VERSION

HT2DC20S20 PLLMC plastic leadless module carrier SOT385-1

2001 Oct 01 4

Philips Semiconductors Product speciﬁcation

HITAG 2 stick transponder HT2DC20S20

BLOCK DIAGRAM

MGW186

handbook, full pagewidth

RECTIFIER

VOLTAGE LIMITER

CONTACTLESS INTERFACE

POWER-ON

RESET

CLOCK

RECOVERY

MODULATOR

DEMODULATOR

DATA

ACQUISITION

CONTROL LOGIC

TRANSPONDER IC

HT2DC20S20

EEPROM

ACCESS CONTROL

CALCULATION UNIT

EEPROM

Fig.1 Block diagram.

2001 Oct 01 5

Philips Semiconductors Product speciﬁcation

HITAG 2 stick transponder HT2DC20S20

FUNCTIONAL DESCRIPTION

Memory organization

The memory of the transponder consists of 256 bits

EEPROMmemoryandisorganizedin8 pageswith32 bits

each.

Depending on the operating mode the EEPROM is

organized as described in Table 1.

Table 1 Memory organization

Operating modes

With the configuration byte, the operating mode and the

access rights to the memory can be selected.

During power-up of the transponder the configuration byte

is read from the EEPROM of the transponder.

The HT2DC20S20 can operate in several modes:

•Crypto mode

Mode for writing or reading the transponder with

encrypted data transmission.

•Password mode

Mode for writing or reading the transponder with plain

data transmission.

•Public mode A (Manchester)

Read-only mode. The 64 bits of the user pages 4 and 5

are cyclically transmitted to the read and write device.

•Public mode B (biphase)

Read-only mode according to ISO standards 11784

and 11785 for animal identification. The 128 bits of the

user pages 4 to 7 are cyclically transmitted to the read

and write device.

•Public mode C (biphase)

Read-only mode emulating the read operation of the

PCF793X (with a slightly different program mode

check). In the public mode C the 128 bits of the user

pages 4 to 7 are cyclically transmitted to the read and

write device.

PAGE CONTENT

Crypto mode

0 serial number

1 32 LSBs of 48-bit key

2 16 MSBs of 48-bit key; 16 bits reserved

3 8-bit conﬁguration; 24-bit password TAG

4 read/write page

5 read/write page

6 read/write page

7 read/write page

Password mode

0 serial number

1 password RWD

2 reserved

3 8-bit conﬁguration; 24-bit password TAG

4 read/write page

5 read/write page

6 read/write page

7 read/write page

2001 Oct 01 6

Philips Semiconductors Product speciﬁcation

HITAG 2 stick transponder HT2DC20S20

handbook, full pagewidth

MGW187

READ-ONLY

WAIT

AUTHORIZED read, write

commands

RF field applied

entering public modes

(if configured)

start authentication

HALT

Fig.2 Status flow.

Status ﬂow

After entering the RF field the transponder waits for a

command to start the authentication (see Fig.2). After

issuing this command the mutual authentication takes

place, followed by read and write commands.

Inthe passwordmode thedatatransfer occursplain andin

the crypto mode data are encrypted.

The halt state can be entered for muting a transponder.

Ifthe transponderis configuredinone ofthe publicmodes,

these modes are entered automatically after a certain

waiting time and data pages are sent cyclically to the read

and write device.

By issuing the command to start the authentication during

the waiting time also public mode transponders can be

brought into the authorized state.

Conﬁguration

If you change the configuration (keys or passwords) you

have to place the transponder directly on the antenna

(0-distance)! In order to avoid any errors, do not move the

transponder during this write process and be sure that you

are in a safe environment without electrical noise.

The configuration byte is represented by the first 8 bits of

page 3 of the transponder memory (see Table 2).

2001 Oct 01 7

Philips Semiconductors Product speciﬁcation

HITAG 2 stick transponder HT2DC20S20

Table 2 Format of page 3

Table 3 Bits of the conﬁguration byte

Notes

1. The coding in HITAG 2 operation is depending on bit 0.

2. The setting of this bit is One Time Programmable (OTP).

Do not set bit 6 of the configuration byte to logic 1 before having written the final data into page 3 (including the

configuration byte and password TAG) of the transponder.

3. The setting of this bit is One Time Programmable (OTP).

Do not set bit 7 of the configuration byte to logic 1 before having written the final data into pages 1 and 2 of the

transponder.

Table 4 Standard values of the conﬁguration byte

PAGE 3

bit 31 bit 24 bit 23 bit 0

conﬁguration byte (8 bits) password TAG (24 bits)

76543210

BIT VALUE DESCRIPTION REMARK

0 0 Manchester code does effect HITAG 2 operation only

1 biphase code does effect HITAG 2 operation only

2, 1 00 public mode B coding biphase; note 1

01 public mode A coding Manchester; note 1

10 public mode C coding biphase; note 1

11 HITAG 2 coding depending on bit 0; note 1

3 0 password mode

1 crypto mode

4 0 pages 6 and 7 read/write

1 pages 6 and 7 read-only

5 0 pages 4 and 5 read/write

1 pages 4 and 5 read/write

6 0 page 3 read/write

1 page 3 read-only conﬁguration byte and password TAG ﬁxed; note 2

7 0 pages 1 and 2 read/write

1 pages 1 no read and write note 3

page 2 read-only when transponder is in password mode

page 3 no read and write when transponder is in crypto mode

MODE SELECTION VALUE

Password mode 0x06

Crypto mode 0x0E

Public mode A 0x02

Public mode B 0x00

Public mode C 0x04

2001 Oct 01 8

Philips Semiconductors Product speciﬁcation

HITAG 2 stick transponder HT2DC20S20

Deﬁnition of keys and passwords

Keys are cryptographic codes, which determine data

encryptionduring data transferbetween thereadand write

device and the transponder. They are used to select a

HT2DC20S20 transponder in the crypto mode. The 16-bit

key HIGH and 32-bit key LOW form one 48-bit key which

has to be identical on both the transponder and the read

and write device.

Passwords are needed to select a HT2DC20S20

transponder in the password mode. There is one pair of

passwords (password TAG and password RWD) which

has to be identical both on the transponder and the read

and write device:

•Password TAG

Password that the transponder sends to the read and

write device and which may be verified by the latter

(depending on the configuration of the read and write

device).

•Password RWD

Password that the read and write device sends to the

transponder and which is checked for identity by the

latter.

It is important that the following values are in accordance

with each other, i.e. the respective data on the read and

write device and on the transponder have to be identical

pairs.

The keys and passwords are predefined by Philips by

means of defined transport passwords and a transport

key. They can be written to memory, which means that

they can be changed (see also Section “Configuration of

delivered transponders”).

Remark: keys and passwords only can be changed if their

current values are known!

Table 5 Keys and passwords for the read and write device and the transponder

Note

1. Optional for both password and crypto mode; depending on the configuration of the read and write device.

Conﬁguration of delivered transponders

HT2DC20S20 transponders are delivered with the following configuration.

Table 6 Conﬁguration of delivered transponders

Note

1. Before delivering transponders to end users, pages 1 to 3 should be locked by setting configuration byte: set bit 6 to

logic 1 for page 3 and set bit 7 to logic 1 for pages 1 and 2.

MODE ON THE READ AND WRITE DEVICE ON THE TRANSPONDER

Password mode password RWD ⇔password RWD

Crypto mode key LOW ⇔key LOW

key HIGH ⇔key HIGH

−password TAG; note 1 ⇔password TAG

ITEM NAME VALUE DESCRIPTION REMARK

Unique serial number serial number 0xXXXX read-only ﬁxed

Conﬁguration conﬁguration byte 0x06 password mode;

Manchester code;

pages 1 to 7 read/write

can be changed;

note 1

Transport passwords

and transport keys password RWD 0x4D494B52 MIKR

password TAG 0xAA4854

key LOW 0x4D494B52 MIKR

key HIGH 0x4F4E ON

2001 Oct 01 9

Philips Semiconductors Product speciﬁcation

HITAG 2 stick transponder HT2DC20S20

LIMITING VALUES

All values are in accordance with the Absolute Maximum Rating System (IEC 60134).

Note

1. Resistivity against magnetic pulses.

ELECTRICAL CHARACTERISTICS

Period time T0=8µs (f0= 125 kHz); note 1.

Notes

1. All parameters are characterized with the SCEMTEC test equipment (STM-1) available from SCEMTEC,

Reichshof-Wenrath, Germany. All parameters are guaranteed within the temperature range of Tamb =−40 to +85 °C.

2. Maximum available field strength of the test equipment. Transponder limit has not been characterized.

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT

N number of erase/write cycles of EEPROM 100000 −

tD(ret) data retention time of EEPROM Tamb =55°C10−years

Toper operating temperature −40 +85 °C

Tstg storage temperature −55 +125 °C

B magnetic ﬂux density note 1 −0.2 T

avvibration acceleration 10 to 2000 Hz; 3 axis;

IEC 68-2-6; Test Fc −10 g

asshock acceleration 3 axis; IEC 68-2-27;

Test Ea −1500 g

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

f0resonant frequency 121 125 129 kHz

B bandwidth 2.3 −−kHz

BTHR(p-p) magnetic ﬂux density for data transmission

from transponder (peak-to-peak value) f0= 125 kHz 35 −400(2) µT

BPRG(p-p) magnetic ﬂux density for programming the

EEPROM (peak-to-peak value) f0= 125 kHz; m = 0.95;

tLOW =8T

35 −400(2) µT

BAUTH(p-p) magnetic ﬂux density for mutual

authentication (peak-to-peak value) f0= 125 kHz; m = 0.95;

tLOW =8T

35 −400(2) µT

BREAD(p-p) ﬁeld absorption due to the modulation of the

transponder (peak-to-peak value) f0= 125 kHz;

Bﬁeld =35µT (p-p) 8−−µT

MIPRG modulation index (m) of the base station for

programming and authentication f0= 125 kHz;

Bﬁeld =35µT (p-p);

tLOW =8T

; see Fig.3

95 −100 %

2001 Oct 01 10

Philips Semiconductors Product speciﬁcation

HITAG 2 stick transponder HT2DC20S20

MGW174

Bmin

Bmax

Fig.3 Definition of modulation index.

Definitions:

mBmax Bmin

–

Bmax Bmin

-----------------------------------

mread Bmax Bmin

–=

MECHANICAL CHARACTERISTICS

The transponder is sealed in epoxy resin moulding compound. The designation of the package is SOT385-1

(see Chapter “Package outline”).

PARAMETER VALUE

Mechanical dimensions 12 ×6×3mm

Protection class IP67

Casting material epoxy resin

Transponder IC type HT2ICS20

2001 Oct 01 11

Philips Semiconductors Product speciﬁcation

HITAG 2 stick transponder HT2DC20S20

PACKAGE OUTLINE

UNIT A1A2A3D(1) D1(1) α

REFERENCES

OUTLINE

VERSION EUROPEAN

PROJECTION ISSUE DATE

IEC JEDEC EIAJ

mm 1.2

1.1 2.1

1.9

3.05

2.90 0.165 12.1

11.9 5.1

4.9 4.6

4.4 46

DIMENSIONS (mm are the original dimensions)

Note

1. Plastic protrusions of 0.2 mm per side are not included.

SOT385-1 01-06-27

E(1) E1(1)

6.1

5.9

A-A

A1A2

Cross section

(not to scale)

0 2.5 5 mm

scale

PLLMC: plastic leadless module carrier SOT385-1

2001 Oct 01 12

Philips Semiconductors Product speciﬁcation

HITAG 2 stick transponder HT2DC20S20

DATA SHEET STATUS

Notes

1. Please consult the most recently issued data sheet before initiating or completing a design.

2. The product status of the device(s) described in this data sheet may have changed since this data sheet was

published. The latest information is available on the Internet at URL http://www.semiconductors.philips.com.

DATA SHEET STATUS(1) PRODUCT

STATUS(2) DEFINITIONS

Objective data Development This data sheet contains data from the objective speciﬁcation for product

development. Philips Semiconductors reserves the right to change the

speciﬁcation in any manner without notice.

Preliminary data Qualiﬁcation This data sheet contains data from the preliminary speciﬁcation.

Supplementary data will be published at a later date. Philips

Semiconductors reserves the right to change the speciﬁcation without

notice, in order to improve the design and supply the best possible

product.

Product data Production This data sheet contains data from the product speciﬁcation. Philips

Semiconductors reserves the right to make changes at any time in order

to improve the design, manufacturing and supply. Changes will be

communicated according to the Customer Product/Process Change

Notiﬁcation (CPCN) procedure SNW-SQ-650A.

DEFINITIONS

Short-form specification  The data in a short-form

specification is extracted from a full data sheet with the

same type number and title. For detailed information see

the relevant data sheet or data handbook.

Limiting values definition Limiting values given are in

accordance with the Absolute Maximum Rating System

(IEC 60134). Stress above one or more of the limiting

values may cause permanent damage to the device.

These are stress ratings only and operation of the device

attheseor atanyotherconditions above thosegiveninthe

Characteristics sections of the specification is not implied.

Exposure to limiting values for extended periods may

affect device reliability.

Application information  Applications that are

described herein for any of these products are for

illustrative purposes only. Philips Semiconductors make

norepresentationorwarrantythatsuchapplicationswillbe

suitable for the specified use without further testing or

modification.

DISCLAIMERS

Life support applications  These products are not

designed for use in life support appliances, devices, or

systems where malfunction of these products can

reasonably be expected to result in personal injury. Philips

Semiconductorscustomersusingorsellingtheseproducts

for use in such applications do so at their own risk and

agree to fully indemnify Philips Semiconductors for any

damages resulting from such application.

Right to make changes  Philips Semiconductors

reserves the right to make changes, without notice, in the

products, including circuits, standard cells, and/or

software, described or contained herein in order to

improve design and/or performance. Philips

Semiconductors assumes no responsibility or liability for

theuseofanyof these products,conveysnolicenceortitle

under any patent, copyright, or mask work right to these

products,and makes norepresentationsor warrantiesthat

these products are free from patent, copyright, or mask

work right infringement, unless otherwise specified.

2001 Oct 01 13

Philips Semiconductors Product speciﬁcation

HITAG 2 stick transponder HT2DC20S20

NOTES

2001 Oct 01 14

Philips Semiconductors Product speciﬁcation

HITAG 2 stick transponder HT2DC20S20

NOTES

2001 Oct 01 15

Philips Semiconductors Product speciﬁcation

HITAG 2 stick transponder HT2DC20S20

NOTES

All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner.

The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed

without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license

under patent- or other industrial or intellectual property rights.

Philips Semiconductors – a w orldwide compan y

Contact information

For additional information please visit http://www.semiconductors.philips.com. Fax: +31 40 27 24825

For sales ofﬁces addresses send e-mail to: sales.addresses@www.semiconductors.philips.com.

Printed in The Netherlands 613502/02/pp16 Date of release: 2001 Oct 01 Document order number: 9397 750 08328