EM MICROELECTRONIC EM4450, EM4550 User Manual

EM MICROELECTRONIC - MARIN SA

EM4450 EM4550

1 KBit Read/Write Contactless Identification Device

Description

The EM4450/4550 is a CMOS integrated circuit intended for use in electronic Read/Write RF Transponders. The difference between EM4450 and EM4550 is that EM4550 are bumped and has megapads for the two coils. The chip contains 1 KBit of EEPROM which can be configured by the user, allowing a write inhibited area, a read protected area, and a read area output continuously at power on. The memory can be secured by using the 32 bit password for all write and read protected operations. The password can be updated, but never read. The fixed code serial number and device identification are laser programmed making every chip unique.

The EM4450/4550 will transmit data to the transceiver by modulating the amplitude of the electromagnetic field, and receive data and commands in a similar way. Simple commands will enable to write EEPROM, to update the password, to read a specific memory area, and to reset the logic.

The coil of the tuned circuit is the only external component required, all remaining functions are integrated in the chip.

Features

 1 KBit of EEPROM organized in 32 words of 32 bits

 32 bit Device Serial Number (Read Only Laser ROM)

 32 bit Device Identification (Read Only Laser ROM)

 Power-On-Reset sequence

 Power Check for EEPROM write operation

 User defined Read Memory Area at Power On

 User defined Write Inhibited Memory Area

 User defined Read Protected Memory Area

 Data Transmission performed by Amplitude Modulation

 Two Data Rate Options 2 KBd (Opt64) or 4 KBd (Opt32)

 Bit Period = 64 or 32 periods of field frequency

 170 pF ± 2% on chip Resonant Capacitor

 -40 to +85°C Temperature range

 100 to 150 kHz Field Frequency range

 On chip Rectifier and Voltage Limiter

 No external supply buffer capacitance needed due to

low power consumption

 Available in chip form for mass production and PCB and

CID package for samples.

Typical Operating Configuration

Coil2

EM4450

Coil1

Typical value of inductance at 125 kHz is 9.6 mH

Applications

 Ticketing

 Automotive Immobilizer with rolling code

 High Security Hands Free Access Control

 Industrial automation with portable database

 Manufacturing automation

 Prepayment Devices

Fig.1

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Block Diagram

EM4450 EM4550

coil2

coil1

System Principle

Modulator Encoder

AC/DC

converter

Clo ck

Ex t r ac t o r

Data

Ex t r ac t o r

Voltage

Regu lato r

Sequencer

Command

Po w e r

Control

Dec oder

ROM

EEPROM

Res et

Write Enable

Control

Logic

Fig. 2

Data to be sent

to transponder

Osc illator

Dat a

Dec od er

Data rece ive d

from

transponder

Sig nal on

Tr ansceiver coi l

Sig nal on

Tr ansponder coil

RF Carrier

Transceiver

Mo du la to r

Antenna

Filte r &

Gain

Driv er

RECEIVE M ODE

Data

Demodulator

Transponder

Coil 1

EM4450

Sig nal on

Tr ansponder coi l

Sig nal on

Transceiver coil

RF Carrier

Coil 2

READ M ODE

Data

Fig. 3

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EM4450

EM4550

Absolute Maximum Ratings

Parameter Symbol Conditions

Maximum AC peak Current induced on COIL1 and COIL2 Power Supply Maximum Voltage other pads Minimum Voltage other pads Storage temperature T Electrostatic discharge maximum to MIL-STD-883C method 3015

Stresses above these listed maximum ratings may cause permanent damages to the device. Exposure beyond specified operating conditions may affect device reliability or cause malfunction.

Handling Procedures

This device has built-in protection against high static voltages or electric fields; however, anti-static precautions must be taken as for any other CMOS component. Unless otherwise specified, proper operation can only occur when all terminal voltages are kept within the voltage range. Unused inputs must always be tied to a defined logic voltage level.

V V V

COIL

max

min

store

ESD

± 30 mA

-0.3 to 3.5 V +0.3V

VSS-0.3V

-55 to +125°C

2000V

Operating Conditions

Parameter Symbol Min Max Unit

Operating Temperature T Maximum coil current I AC Voltage on Coil V Supply Frequency f

COIL

-40 +85 °C

coil

100 150 kHz

coil

10 mA

note 1

note 1: Maximum voltage is defined by forcing 10mA on Coil1 - Coil2.

Electrical Characteristics

VDD =2.5V, VSS =0V , f

Parameter Symbol Conditions Min Typ Max Unit

Supply Voltage V Minimum EEPROM write voltage Power Check EEPROM write I Supply current / read I Suppy current / write I

Modulator ON voltage drop V

Monoflop T Resonance Capacitor C Powercheck level V Power On Reset level high V Clock extractor input min. Clock extractor input max. EEPROM data endurance N EEPROM retention T

= 125 kHz Sine wave , V

coil

DDee

PWcheck

mono

PWcheck

prh

clkmin

clkmax

ret

Max. Voltage to detect modulation stop

Top = 55°C after 100'000 cycles (note 2) 10 years

= 1Vpp , Top = 25°C , unless otherwise specified

coil

2.3 3.2 V

VDD = 2.8V 32

Read Mode 3

Write mode (VDD = 2.8V) 22

(COIL1 - VSS)

& V

(COIL2 - VSS) Icoil

& V

(COIL2 - VSS) Icoil

= 100µA

= 5 mA

0.50

2.50

35 85

166.6 170 173.4 pF

22.7V

Rising Supply 1 1.5 V

Minimum Voltage for Clock Extraction

0.25 25

Erase all / Write all at VDD = 3.5 V 100'000 cycles

µA µA µA

V V

µs

note 2: Based on 1000 hours at 150°C

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EM4450 EM4550

Timing Characteristics

VDD =2.5V, VSS=0V , f All timings are derived from the field frequency and are specified as a number of RF periods..

Parameter Symbol Conditions Value Unit

Option : 64 clocks per bit Read Bit Period t LIW/ACK/NACK pattern duration t Read 1 Word Duration t Processing Pause Time t Write Access Time t Initialization Time t EEPROM write time t Option : 32 clocks per bit Read Bit Period t LIW/ACK/NACK pattern duration t Read 1 Word Duration t Processing Pause Time t Write Access Time t Initialization Time t EEPROM write time t

RF periods represent periods of the carrier frequency emitted by the transceiver unit. For example, if 125 kHz is used : The Read bit period (Opt64) would be : 1/125'000*64 = 512 µs, and the time to read 1 word : 1/125'000*3200 = 25.6 ms. The Read bit period (Opt32) would be : 1/125'000*32 = 256 µs, and the time to read 1 word : 1/125'000*1600 = 12.8 ms.

= 125 kHz Sine wave, V

coil

Opt64

rdb

patt

rdw

init

wee

Opt32

rdb

patt

rdw

init

wee

= 1Vpp , Top = 25°C unless otherwise specified

coil

64 RF periods

320 RF periods

including LIW 3200 RF periods

64 RF periods 64 RF periods

2112 RF periods

VDD = 3V 3200 RF periods

32 RF periods

160 RF periods

including LIW 1600 RF periods

32 RF periods 32 RF periods

1056 RF periods

VDD = 3V 2624 RF periods

ATTENTION Due to amplitude modulation of the coil-signal, the clock-extractor may miss clocks or add spurious clocks close to the edges of the RF-envelope. This desynchronisation will not be larger than ±3 clocks per bit and must be taken into account when developing reader software.

Functional Description

General

The EM4450/4550 is supplied by means of an electromagnetic field induced on the attached coil. The AC voltage is rectified in order to provide a DC internal supply voltage. When the DC voltage crosses the Power-On level, the chip enters the Standard Read Mode and sends data continuously. The data to be sent in this mode is user defined by storing the first and last addresses to be output. When the last address is sent, the chip will continue with the first address until the transceiver sends a request. In the read mode, a Listen Window (LIW) is generated before each word. During this time, the EM4450/4550 will turn to the Receive Mode (RM) if it receives a valid RM pattern. The chip then expects a valid command.

Mode of Operation

Po w e r - On

Ini t

Standard

Ge t Comma n d

Read Mode

Execute Command

Rec eiv e

Mode

request ?

YESNO

Write Word

Write Password

Selective Read

Send w ord

Reset

Fig. 4

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EM4450 EM4550

Memory Organisation

The 1024 bit EEPROM is organised in 32 words of 32 bits. The first three words are assigned to the Password, the Protection word, and the Control word. In order to write one of these three words, it is necessary to send the valid password. At fabrication, the EM4450/4550 comes with all bits of the password programmed to a logic "0". The Password cannot be read out. The memory contains two extra words of Laser ROM. These words are laser programmed during fabrication for every chip, are unique and cannot be altered.

Memory Map

Bit 0 ------------------------------ Bit 31

Word 0 PASSWORD EE

PROTECTION WORD EE 0 – 7 First Word Read 0 – 7 First Word Read Protected

CONTROL WORD EE 8 – 15 Last Word Read 8 – 15 Last Word Read Protected

928 Bits of USER 17 Read After Write On/Off 24 – 31 Last Word Write Inhibited

EEPROM 18 – 31 User available

31 32 DEVICE SERIAL NUMBER Laser Write Only – No Read Access 33 DEVICE IDENTIFICATION Laser On means bit set to logic '1'

EE 16 Password Check On/Off 16 – 23 First Word Write Inhibited

Control Word Protection Word

Password

Device Identification Word &

Off means bit set to logic '0'

Serial Number Word

Laser Programmed – Read only

Fig.5

Standard Read Mode

After a Power-On-Reset and upon completion of a command, the chip will execute the Standard Read Mode, in which it will send data continuously, word by word from the memory section defined between the First Word Read (FWR) and Last Word Read (LWR). When the last word is output, the chip will continue with the first word until the transceiver sends a request. If FWR and LWR are the same, the same word will be sent repetitively. The Listen Window (LIW) is generated before each word to check if the transceiver is sending data. The LIW has a duration of 320 (160 opt 32) periods of the RF field. FWR and LWR have to be programmed as valid addresses (FWR ≤ LWR and ≤ 33). The words sent by the EM4450/4550 comprise 32 data bits and parity bits. The parity bits are not stored in the EEPROM, but generated while the message is sent as described below. The parity is even for rows and columns, meaning that the total number of "1's" is even (including the parity bit).

Word organisation (Words 0 to 33)

First bit output

D0 D1 D2 D3 D4 D5 D6 D7 P0

D8 D9 D10 D11 D12 D13 D14 D15 P1

D16 D17 D18 D19 D20 D21 D22 D23 P2

D24 D25 D26 D27 D28 D29 D30 D31 P3

PC0 PC1 PC2 PC3 PC4 PC5 PC6 PC7 0

Column Even Partiy

Data Row Even Parity

Last bit output

logic '0'

Fig. 6

When a word is read protected, the output will consist of 45 bits set to logic "0". The password has to be used to output correctly a read protected memory area.

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Read Sequence

EM4450 EM4550

POR

INIT

OUTPUT

T0 periods :

32 32 128 64 64 (Opt64)

16 16 64 32 32 (Opt32)

LIW FWR LIW FWR+1 LWR LIW FWR LIWLIWLIW

LIW D0-D7 P0 D8-D15 P1 D16-D23 P2 D24-D31 P3 PC0-PC7 "0"

1 bit = 64 T0 periods (Opt64)

32 T0 periods (Opt32)

Data

Coded Data

T0 = Period of RF carrier

frequency

1 bit

1 bit 1 bit

Fig. 7

Receive Mode

To activate the Receive Mode, the Transceiver sends to the chip the RM pattern (while in the modulated phase of a Listen Window LIW). The EM4450/4550 will stop sending data upon reception of a valid RM. The chip then expects a command. The RM pattern consists of 2 bits "0" sent by the transceiver. The first bit "0" transmitted is to be detected during the 64 (32 opt 32) periods where the modulation is "ON" in LIW.

output

WORD n LIW

input

RM COMMAND

Fig. 8

Commands

The commands are composed of nine bits : eight data bits and one even parity bit (total amount of "ones" is even including the parity bit).

COM M AND BITS FUNCTION

0 0 0 0 0 0 0 1 1 LOGIN 0 0 0 1 0 0 0 1 0 WRITE PASSWORD 0 0 0 1 0 0 1 0 0 WRITE WORD 0 0 0 0 1 0 1 0 0 SELECTIVE READ MODE 1 0 0 0 0 0 0 0 1 RESET

First bit Received Parity bit

Fig. 9

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EM4450

EM4550

Selective Read Mode

The Selective Read Mode is used to read other data than that defined between FWR and LWR. To enter Selective Read Mode, the Transceiver has to send during LIW a Receive mode pattern (RM) to turn the EM4450/4550 in Receive Mode. Then the Selective Read Mode Command is sent by the transceiver followed by the First and Last addresses to be read. The FWR and LWR are then replaced by the new addresses and the chip is operating in the same way as the Standard Read Mode. The control word is not modified by this command, and the next standard read mode operation will work with original FWR and LWR (Selected area is read once and then the chip returns to Standard Read Mode). To read words which are Read Protected, a Login command has to be sent by the transceiver prior to the Selective Read command. The Login command is to be used only once for all subsequent commands requiring a password. The Selective Read mode command is followed by a single 32-bit word containing the new first and last addresses. Bits 0 to 7 correspond to the First Word Read and bits 8 to 15 correspond to the Last Word Read. Bits 16 to 31 have to be sent but are not used in the chip. The parities must be sent according to the word organisation as described in fig.7. Note that bit 31 is transmitted first. To read the device Identification or the Serial Number, the Selective Read Command allows direct access to the Laser programmed words. These words can also be addressed in the standard read mode by selecting the addresses accordingly.

output

input

WORD n LIW

RM Selective RD ADDRESSES

First bit receiv ed

XX XX XX XX XX XX XX XX P3 XX XX XX XX XX XX XX XX P2

LW7 LW 6 LW5 LW4 LW3 LW2 LW1 LW0 P1 FW 7 FW6 FW 5 FW 4 FW3 FW 2 FW 1 FW0 P0 PC7 PC6 PC5 PC4 PC3 PC2 PC1 PC0 "0"

Addresses Bit Stream Fo rmat

CK/NAK LIW LIW FWR LIW

Fig. 10

Fig. 11

Reset Command

The Reset Command will return from any mode to the Standard Read Mode. The next word out is the FWR.

output

input

WORD n LIW

RM RESET

CK/NAK

LIW LIW FWR LIW

init

Fig. 12

The Login command is used to access protected memory areas. This command has to be used only once to perform several password protected commands. The Power-On-Reset sequence and the Reset command will reset the password entry, and a new Login command has to be received to perform further password protected operations. Upon reception of a correct password, the EM4450/4550 will respond with an acknowledge pattern (ACK) and then continue in Standard Read Mode. If the Login is correct then password protected operations are allowed. If the password is incorrect, a NAK pattern is issued and password protected operations will not be possible (refer to Write Word for password data structure).

output

input

WORD n LIW

RM LOGIN PASSWORD

CK/NAK LIW LIW FWR LIW

Fig. 13

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EM4450

EM4550

If bit 16 of the control word is disabled (Password Check ON/OFF), the Login is still mandatory to modify the Protection Word, the Control Word, and the Password, but not to write in the EEPROM which is not write inhibited. In order to modify a write inhibited word, the Protection word has to be modified first. The Read protected area always requires the Login to be read. If the Write Protection Word is write protected, the write protection configuration is locked.

Write Password

When a Write Password command is received, the chip next expects information on the actual valid password. The chip sends back an ACK pattern if the password is correct. Then the chip expects the new password consisting of 32 bits + parity bit to be stored in the EEPROM. The chip will respond with an ACK pattern for a correct reception of data upon reception of the new password, and then will send another acknowledge pattern (ACK) to announce that the data is stored in the EEPROM. The Read after Write function has no effect on this command. If the password is wrong or the transmission is faulty, the chip will : send a NAK pattern; return to the Standard Read Mode; and, the password will remain the same. (Refer to Write Word for password data structure).

output

input

WORD n LIW

RM WRITE PW ACTUAL PW

CK LIW

RM NEW PW

TRANSCEIVER RF FIELD "ON"

wee

CK LIW LIW FWR

Fig. 14

Write Word

The Write mode allows modification of the EEPROM contents word by word. To modify address 1 (Protection word) and address 2 (Control word), it is mandatory to first send a Login command in order to Log in (like in a computer). The new written values will take effect only after performing a Reset command. It is strongly recommended to check the result of modifying the contents of these addresses effecting the function of the chip. Address 0 (Password) cannot be modified with this command but can be changed with the Write Password command. Addresses 3 to 31 are programmable according to the defined protections. If the Password Check bit is off (bit 16 of control word) and the word is not write inhibited, the selected word can be freely modified without password. If the Password Check bit is on and the word is not write inhibited, the selected word can be modified with a previous Login. In any case, if the word is write inhibited, the protection word has to be changed before programming can occur.

Write to Address Check Password bit

(bit 16 / Control word)

Write Inhibit (Protection word)

Write Operation

0 X X Only with Write Password

command 1 – 2 X OFF Login always required 1 – 2 X ON Write configuration LOCKED 3 – 31 OFF OFF Freely programmable 3 – 31 ON OFF Login required 3 – 31 X ON Change protection word first

The Write Word command is followed by the address and data. The address consists of a 9 bit block containing 8 data bits and 1 even parity bit. Only 6 bits from the data section are used for the word addressing, and the first three bits sent must be "0". The data consists of 4 times 9 bit blocks, each block consisting of 8 data bits and 1 associated even parity bit and one additional block consisting of 8 column parity bits and "0" as stop bit (Refer to fig. 7)

Address

0 0 A5 A4 A3 A2 A1 A0 Padd

First bit received

Data

D31 D30 D29 D28 D27 D26 D25 D24 P3 D23 D22 D21 D20 D19 D18 D17 D16 P2 D15 D14

D13 D12 .......................... D02 D01 D00 P0 PC7 PC6 PC5 PC4 PC3 PC2 PC1 PC0 "0"

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Note : A5 in write mode always "0" (addresses Laser ROM)

Fig. 15

EM4450

EM4550

After reception of the command, the address, and the data, the EM4450/4550 will check the parity, the write protection status, the Login status, and also if the available power from the RF field is sufficient. If all the conditions are satisfied, an acknowledge pattern (ACK) will be issued afterward and the EEPROM writing process will start. At the end of programming, the chip will send an Acknowledge pattern (ACK). If at least one of the checks fails, the chip will issue a no acknowledge pattern (NAK) instead of ACK and return to the Standard Read Mode. The Transceiver will keep the RF field permanently "ON" during the whole writing process time. The Read After Write function (bit 17 of Control word) controls the mode of operation following a write operation. When "ON" the latest written word will be read out and output next to the ACK pattern and two Listen Windows (LIW-LIW) even if the word is read protected. When "OFF", the ACK is followed immediately by a LIW-LIW and FWR. The last written word is not output. If a request from the transceiver to return in receive mode (RM) is generated during the LIW, another word can be written in. Otherwise, the EM4450/4550 will return in the Standard Read Mode.

Write 1 word

WORD n LIW ACK LIW LIW FWRoutput

input

Write severalwords

WORD n LIWoutput

input

Read After Write function

WORD n LIW

input

RM WRITE WORD ADDRESS DATA

TRANSCEIVER RF FIELD "ON"

ACK

wee

ACK LIW ACK

RM WRITE WORD ADDRESS DATA

wee

CK LIW LIW Last Written LIW LIW FWRoutput

Write not allowed or wrong transmission

WORD n LIW NACK LIW LIW FWRoutput

input

RM WRITE WORD ADDRESS DATA

TRANSCEIVER RF FIELD "ON"

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Fig. 16

EM4450 EM4550

Power-On-Reset (POR)

When the EM4450/4550 with its attached coil enters an electromagnetic field, the built in AC/DC converter will supply the chip. The DC voltage is monitored and a Reset signal is generated to initialise the logic. The contents of the Control word and Protection word will be downloaded to enable the functions (INIT). The Power-On-Reset is also provided in order to make sure that the chip will start issuing correct data. Hysteresis is provided to avoid improper operation at the limit level.

prh

Reset

init

EM4450 A ctive

prhys

Fig. 17

Lock All / Lock Memory Area

The EM4450/4550 can be converted to a Read Only chip or be configured to Read/Write and Read Only Areas by programming the protection word. This configuration can be locked by write inhibiting the Write Protection Word. Great care should be taken in doing this operation as there is no further possibility to change the Write Protection Word. The Control Word can also be protected in the same way thus freezing the operation mode.

Clock Extractor

The Clock extractor will generate a system clock with a frequency corresponding to the frequency of the RF field. The system clock is used by a sequencer to generate all internal timings.

Data Extractor

The transceiver generated field will be amplitude modulated to transmit data to the EM4450/4550. The Data extractor demodulates the incoming signal to generate logic levels, and decodes the incoming data.

Modulator

The Data Modulator is driven by the serial data output from the memory which is Manchester encoded. The modulator will draw a large current from both coil terminals, thus amplitude modulating the RF field according to the memory data.

AC/DC Converter and Voltage Limiter

The AC/DC converter is fully integrated on chip and will extract the power from the incident RF field. The internal DC voltage will be clamped to avoid high internal DC voltage in strong RF fields.

Special Timings

The Processing Pause Time (t

), Write Access Time (twa) and EEPROM Write Time (t

) are timings where the

wee

EM4450/4550 is executing internal operations. During these pauses, the RF field will be influenced.

RF periods :

Same modulati on

as for a normal bi t

32 32

16 16

(O pt64) (O pt32)

(O pt64)

(O pt32)

Dur ing Twa and Twee, the si gnal on the coi l is

damped due to a hig her c urrent c onsumption.

3200

2624

(O pt64)

(O pt32)

wee

Fig. 18

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EM4450 EM4550

Communication from Transponder to the Transceiver (READ MODE)

The EM4450/4550 modulates the amplitude of the RF field to transmit data to the transceiver. Data are output serially from the EEPROM and Manchester encoded.

1 bit

64 periods of RF field (Opt64) 32 periods of RF field (Opt32)

Data from EEPROM

Coded Data Measured on the COIL

The EM4450/4550 uses different patterns to send status information to the transceiver. Their structure can not be confused with a bit pattern sequence. These patterns are the Listen Window (LIW) to inform the transceiver that data can be accepted, the Acknowledge (ACK) indicating proper communication and end of EEPROM write, and the No Acknowledge (NAK) when something is wrong. The LIW, due to its special structure, can be used to synchronize the transceiver during a read operation. The LIW is sent before each word, and is sent twice before FWR.

1 bit 1 bit 1 bit

32 periods (Opt64) 16 periods (Opt32)

Opt64 is the chip option with a bit period corresponding to 64 periods of the RF field Opt32 is the chip option with a bit period corresponding to 32 periods of the RF field

Fig. 19

LIW ACK NAK

32 32 128 64 64 32 32 96 32 64 32 32 32 32 96 32 96 32

All numbers repres ent number of periods of RF f ield

Communication from the Transceiver to the Transponder (RECEIVE MODE)

The EM4450/4550 can be switched to the Receive Mode ONLY DURING A LISTEN WINDOW. The Transceiver is synchronized with the incoming data from the transponder and expects a LIW before each word. During the phase where the chip has its modulator "ON" (64/32 periods of RF [Opt64/Opt32] ), the transceiver has to send a bit "0". A certain phase shift in the read path of the transceiver can be accepted due to the fact that when entering Receive Mode, the Transceiver becomes the Master. At reception of the first "0", the chip immediately stops the LIW sequence and then expects another bit "0" to activate the receive mode. Once the EM4450/4550 has received the first bit "0", the transceiver is imposing the timing for synchronisation. The EM4450/4550 turns "ON" its modulator at the beginning of each frame of a bit period. To send a logic "1" bit, the transceiver continues to send clocks without modulation. After half a bit period, the modulation device of the EM4450/4550 is turned "OFF" allowing recharge of the internal supply capacitor. To send a logic "0" bit, the transceiver stops sending clocks (100% modulation) during the first half of a bit period. The transceiver must not turn "OFF" the field after 7/4 clocks of the bit period (Opt64/Opt32). The field is stopped for the remaining first half of the bit period, and then turned "ON" again for the second half of the bit period. The 32rd/16th clock (Opt64/Opt32) defines the end of the bit. To ensure synchronisation between the transceiver and the transponder, a logic bit set to "0" has to be transmitted at regular intervals. The RM pattern consists of two bits set to "0" thus allowing initial synchronisation. In addition, the chosen data structure contains even parity bits which will not allow more than eight consecutive bits set to logic "1" where no modulation occurs.

(Opt64)

(Opt32)

(Opt64) (Opt32)

Opt6 4 is th e chi p opti on with a bi t per io d cor respo ndi ng t o 64 per iods of th e RF fiel d Opt3 2 is th e chi p opti on with a bi t per io d cor respo ndi ng t o 32 per iods of th e RF fiel d

16 16 48 16 32 16 16 16 16 48 16 48 16 16 16 64 32 32

(Opt64) (Opt32)

Fig. 20

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EM4450 EM4550

While the transceiver is sending data to the transponder, two different modulations will be observed on both coils. During the first half of the bit period, the EM4450/4550 is switching "ON" its modulation device causing a modulation of the RF field. This modulation can also be observed on the transceiver's coil. The transceiver sending a bit "0" will switch "OFF" the field, causing a 100% modulation being observed on the transponder coil.

Bit Period

DATA :

Transceiver

Coil

Transponder

Coil

"1" "1" "1""0" "0" "0"

Periods of RF field (Opt 64):

Periods of RF field (Opt 32):

Recommended

Minimum

32 32 32 32

16 16

: 7/4 periods (Opt64/Opt32)

: 1 period

Opt64 is the chip option with a bit period corresponding to 64 priods of the RF field Opt32 is the chip option with a bit period corresponding to 32 priods of the RF field

Modulation induced by the Transceiver

Modulation induced by the Transponder

Fig. 21

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Package Information

Dimensions of PCB and CID version

EM4450 EM4550

CID Package

FRONT V IEW

SYMBOL MIN TYP MAX

A 8.2 8.5 8.8 B 3.8 4.0 4.2 D 5.8 6.0 6.2

e 0.38 0.5 0.62 F 1.25 1.3 1.35 g 0.3 0.4 0.5 J 0.42 0.44 0.46

K 0.115 0.127 0.139 R 0.4 0.5 0.6

Dimensions are in mm

TOP VIEW

MARKING

AREA

PCB Packa ge

C2 C1

SYMBOL MIN TYP MAX

X8.0 Y4.0 Z1.0

Dimensions are in mm

Fig. 22 Fig. 23

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EM4450 EM4550

Chip Dimensions

1511

1112

Pad size : 86 X 86

200

174

895

740

585

430

280

140

114

167

EM4550

903

714

189

1237

2345678

130

270

420

575

730

885

EM4450

889

1237

1824

1425

200

234567

Pad size : 86 X 86

All dimensions in µm

Mega pad size : 200 X 400

All dimensions in µm

Fig. 24 Fig. 25

Pad Description

Pad Name Function

1 COIL1 Coil Terminal 1

2 TEST_CLK Test Clock input with pull-down

3 TEST_IN Test Input with pull-down

4 TEST Test Mode Input with pull-down

5 TEST_OUT Test Output

6 VDD Positive Internal Supply Voltage

7 VPOS Internal Supply

8 VSS Negative Internal Supply Voltage

9 COIL2 Coil Terminal 2

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EM4450

ga p

)

g p

EM4550

Ordering Information

Die Form

This chart shows general offering; for detailed Part Number to order, please see the table “Standard Versions” below.

EM4450 A6 WS 11 %%%

Circuit Nb: Customer Version:

EM4450: standard pads %%% = only for custom specific version EM4550: me

ersion: Bumping:

A6 = Manchester, 64 clocks per bit " " (blank) = no bumps (EM4450 onl A5 = Manchester, 32 clocks per bit E = with Gold Bumps (EM4550 onl

Die form: Thickness:

WW = Wafe WS = Sawn Wafer/Frame 7 = 7 mils (178um WT = Sticky Tape 11 = 11 mils (280um

ads

6 = 6 mils (152um

27 = 27 mils (686um

Packaged Devices

This chart shows general offering; for detailed Part Number to order, please see the table “Standard Versions” below.

CI2LC %%%EM4450 A6

Circuit Nb: Customer Version:

EM4450: standard pads %%% = only for custom specific version

ersion:

A6 = Manchester, 64 clocks per bit A5 = Manchester, 32 clocks

Package/Card & Delivery Form:

CI2LB = CID Pack, 2 long pins (2.5mm), in tape CI2LC = CID Pack, 2 lon CB2RC = PCB Packa

er bit

ins (2.5mm), in bulk

e, 2 pins, in bulk

Remarks:

• For ordering please use table of “Standard Version” table below.

• For specifications of Delivery Form, including gold bumps, tape and bulk, as well as possible other delivery form or

packages, please contact EM Microelectronic-Marin S.A.

15 www.emmicroelectronic.com

Standard Versions & Samples:

For samples please order exclusively:

EM4450 EM4550

Part Number Bit coding

EM4450 A6 CI2LC Manchester 64 Standard CID package, 2 pins (length 2.5mm) bulk

EM4450 A6 CB2RC Manchester 64 Standard PCB Package, 2 pins bulk

The versions below are considered standards and should be readily available. For other versions or other delivery form, please contact EM Microelectronic-Marin S.A. Please make sure to give complete part number when ordering, without spaces between characters.

Part Number Bit coding

EM4450 A5 CB2RC Manchester 32 Standard PCB Package, 2 pins bulk

EM4450 A5 CI2LC Manchester 32 Standard CID package, 2 pins (length 2.5mm) bulk

EM4450 A6 CB2RC Manchester 64 Standard PCB Package, 2 pins bulk

EM4450 A6 CI2LB Manchester 64 Standard CID package, 2 pins (length 2.5mm) tape

EM4450 A6 CI2LC Manchester 64 Standard CID package, 2 pins (length 2.5mm) bulk

EM4450 XX YYY-%%% Manchester 32/64 Standard custom custom

EM4550 A6 WS11E Manchester 64 Mega Sawn wafer, 11 mils with gold bumps

EM4550 A6 WT11E Manchester 64 Mega Die on sticky tape, 11 mils with gold bumps

EM4550 XX YYY-%%% Manchester 32/64 Mega custom with gold bumps

Cycle/

bit

Cycle/

bit

Pads Package

Pads Package/Die Form Delivery Form

Delivery

Form

/ Bumping

Product Support

Check our Web Site under Products/RF Identification section. Questions can be sent to cid@emmicroelectronic.com

EM Microelectronic-Marin SA cannot assume responsibility for use of any circuitry described other than circuitry entirely embodied in an EM Microelectronic-Marin SA product. EM Microelectronic-Marin SA reserves the right to change the circuitry and specifications without notice at any time. You are strongly urged to ensure that the information given has not been superseded by a more up-to-date version.

16 www.emmicroelectronic.com

EM MICROELECTRONIC EM4450, EM4550 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual