EM4025 Datasheet, PDF (1/1 Pages) EM Microelectronic - MARIN SA – Read Only Contactless Identification Device with Anticollision

EM MICROELECTRONIC - MARIN SA
EM4025/EM4125
Read Only Contactless Identification Device
with Anticollision
Features
• Anticollision protocol to identify a number of
transponders (better then 20 tags/s at RF/32, 10
tags/s at RF/64)
• 55 bit memory array, laser programmable ROM
• Two mask programmable data rate options: RF/64 and
RF/32
• Data transmission reader to transponder: ASK 100%
(OOK)
• Data transmission transponder to reader: ASK,
Manchester Code
• On chip resonance capacitor
• On chip supply buffer capacitor & voltage limiter
• Large Modulation Depth
• Operating frequency 100 – 150 kHz
• Small chip size convenient for implantation
Typical Applications
• Logistics
• Manufacturing Automation
• Anti-counterfeiting
• Industrial transponder
• Tracking and tracing
Description
The EM4025 is a CMOS integrated circuit for use in
electronic Read Only RF Transponders, often known as a
RFID Tag. The circuit is powered by an external coil
placed in an electromagnetic field, and gets its clock via
the coil terminals. The fixed code device identification is
programmed at manufacture by laser fusing of polysilicon
links. The chip starts at power up in a quiet mode.
Downlink Transmission occurs only on command from the
reader, normally as part of the anticollision/arbitration
scheme. A data rate of 64 or 32 periods of the carrier
frequency per data bit is available. Downlink Data is
Manchester Coded. Only an external coil is needed to
obtain the chip function. A parallel resonant capacitor is
integrated.
The EM4125 is the same device but with bumped
enlarged pads. All specified parameters and description
are applicable for the EM4125 device.
Typical Operating Configuration
COIL1
L
EM4025
COIL2
L: typical 20.78 mH value for f_O = 125 KHz
Fig. 1
Copyright © 2005, EM Microelectronic-Marin SA
Subject to change without notice
Rev. B, 02/05
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