900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf






EM Microelectronic

EM4450 Datasheet Preview

EM4450 Datasheet

(EM4450 / EM4550) 1 KBit Read/Write Contactless Identification Device

No Preview Available !

www.DataSheet4U.com
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
Applications
Ticketing
Automotive Immobilizer with rolling code
High Security Hands Free Access Control
Industrial automation with portable database
Manufacturing automation
Prepayment Devices
Coil2
L EM4450
Coil1
Typical value of inductance at 125 kHz is 9.6 mH
Fig.1
Copyright 2003, EM Microelectronic-Marin SA
1
www.emmicroelectronic.com




EM Microelectronic

EM4450 Datasheet Preview

EM4450 Datasheet

(EM4450 / EM4550) 1 KBit Read/Write Contactless Identification Device

No Preview Available !

Block Diagram
coil2
coil1
Cr
EM4450
EM4550
Modulator
Encoder
ROM
+V
AC/DC
converter
Clock
Extractor
Voltage
Regulator
Cs Pow er
Control
Sequencer
EEPROM
Reset
Write Enable
Data
Extractor
Command
Decoder
Control
Logic
System Principle
Transceiver
Data to be sent
to transponder
Modulator
Oscillator
Antenna
Driver
Data
Decoder
Filter &
Gain
Demodulator
Data received
from
tr ans ponde r
RECEIVE M ODE
Signal on
Transceiver coil
Signal on
Transponder coil
RF Carrier
Data
Copyright 2003, EM Microelectronic-Marin SA
Fig. 2
Transponder
Coil 1
EM4450
Coil 2
Signal on
Transponder coil
Signal on
Transceiver coil
READ M ODE
RF Carrier
Data
Fig. 3
2 www.emmicroelectronic.com


Part Number EM4450
Description (EM4450 / EM4550) 1 KBit Read/Write Contactless Identification Device
Maker EM Microelectronic
PDF Download

EM4450 Datasheet PDF






Similar Datasheet

1 EM4450 (EM4450 / EM4550) 1 KBit Read/Write Contactless Identification Device
EM Microelectronic





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy