512 bit Read/Write Contactless Identification Device

Description

EM4205/4305 is a CMOS integrated circuit intended for use in electronic Read/Write RF transponders. It is suitable for low cost solutions like animal tagging applications. The IC communication protocol is compatible with the EM4469/4569 family. The main difference between the EM4205 and EM4305 is that:

- EM4305 are bumped with enlarged pads for the two coil inputs. The enlarged bumped pads of the EM4305 transponder are intended for direct antenna connection avoiding the need of a module.

- EM4305 offers a 330pF resonant capacitor version

The IC is powered by picking up energy from a continuous 125 kHz magnetic field via an external coil, which together with the integrated capacitor form a resonant circuit. The IC reads out data from its internal EEPROM and sends it out by switching on and off a resistive load in parallel to the coil using a large modulation index. Commands and EEPROM data updates can be executed by AM modulation of the 125 kHz magnetic field. The EM4205/4305 supports bi-phase and Manchester data encodings. The EM4205/4305 operating modes are stored in the EEPROM configuration word. All EEPROM words can be write-protected by setting protection bits. The IC contains a factory programmed 32 bit unique identifier number (UID).

Features 

- 512 bit EEPROM organized in 16 words of 32 bit

- 32 bit unique identifier (UID)

- 32 bit Password read and write protection

- ISO 11784 / 11785 Standard Compliant

- Lock feature converts EEPROM words into Read Only

- Two data encodings: Manchester and Bi-phase

- Multi-purpose data rate: 8, 16, 32, 40 and 64 RF clocks

- Reader Talk First feature

- Compatible with EM4469/EM4569 communication protocol

- 100 to 150 kHz frequency range

- On-chip rectifier and voltage limiter

- No external supply buffer capacitor needed

- -40°C to +85°C temperature range

- Very low power consumption

- Enlarged bumped pads (200 μm x 400 μm) for direct connection of coil (EM4305)

- EM4205: 2 resonant capacitor versions 210pF or 250pF selectable by mask option. The resonant capacitor can be trimmed, at factory level, to offer accuracy on the tolerance of 3%.

- EM4305: 3 resonant capacitor versions 210pF, 250pF or 330pF selectable by mask option

- Available in plastic extremely thin small outline package;  2 terminals; body 1.1 * 1.4 * 0.46 mm

Applications 

- Animal Identification according to ISO FDX-B

- Pigeon races standard I Waste management standard (BDE)

- Access Control

- Industrial