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EM4205/EM4305 is one of the most common low frequency chip, which has many applications such as Animal Identification according to ISO FDX-B,Pigeon races standard,Waste management standard(BDE),ACCESS Control,Industrial etc….

General 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.

Technical Features:

  • 512 Bit of EEPROM organized in 16 words of 32 bits
  • 32 bit unique identifier(UID)
  • 32 bit Password read and write protection
  • ISO 11784/11785 Standard Compliant
  • Lock feature converts EEPROM words in Read Only
  • Two data encodings:Manchester and Biphase
  • Multi-purpose data rate:8,12,32,40 and 64 RF clocks
  • Reader Talk First feature
  • Compatible with EM4469/EM4569 communication protocol
  • 100 to 150KHz frequency range
  • On-chip rectifier and voltage limiter
  • No external supply buffer capacitor needed
  • -40 to +85°C Temperature range
  • Very low power consumption
  • Enlarged bumped pads (200 μm x 400 μm) for direct connection of coil (EM4305)
  • Available in plastic extremely thin small outline package;2 terminals;body 1.1 x 1.4 x 0.46 mm

Ordering Information

Delivery Terms

  • <10K pcs: Within 3-4 working days
  • <100K pcs: Within 6-7 working days
  • <1KK pcs: Within 15 working days.
  • >1KK pcs: On request

Payment Terms

  • TT in advance or LC
  • Others on requested

Why buy from us ?

  • You can get our reply within 12 hours at most time
  • Unsurpassable competitive price
  • Large quantity inventory always
  • Strong at customization on request
  • Experience and expertise
  • Fast delivery and strong package

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Shanghai RealSmart Technologies Co., Ltd.

R201, Bldg E, No. 50, Lane 2080 Lianhua Rd, Minhang Dist, Shanghai 201103, China

Tel: +86 21 6432 6941

Fax: +86 21 6432 6942


Tel: +86 21 6432 6941