Description
The EM4055 is a CMOS integrated circuit for passive read/write RF-transponders operating in the low frequency range (125kHz typically). The chip contains 1kbit of EEPROM which can be configured by the user allowing write inhibited words, read protected words and 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

Features
· 1k bit EEPROM (32 words of 32 bit each)
· User defined Read memory area as default output
· User defined Write protected words
· User defined Read protected words
· Power-check before EEPROM Write operation
· 32 bits WORM anticollision ID
· 32 bits WORM device identification
· Fast Anticollision Protocol for a large number of Transponders
· Detection of Tag entering the field
· Data transmission performed by amplitude modulation
   Reader to transponder : ASK 100%, Transponder to Reader : ASK
· User selectable data-rate : RF/64 or RF/32
· 100kHz to 150kHz field frequency range
· On-chip rectifier and voltage limitation
· On-chip supply buffer capacitor
· Power-on Reset
· -40 to +85°C operating temperature range

Applications
· Ticketing
· Hands free Access control
· Inventory Control
· Prepayment devices
· Manufacturing automation with portable database
· Industrial logistics