GeZhi Electronic Co.Ltd.

GeZhi Electronic Co.Ltd.

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Name: Michael
Tel: +86-13113330725
Fax: +86-13113330725
Mobile: +86-13113330725
Add: JinKe industry DaShi PanYu District GuangZhou City China
Skype: gezhitech007
QQ: 1074079485
MSN: SKYPE: gezhitech007 QQ: 1074079485

EM4305 card(10pcs)

EM4305 card(10pcs) EM4305 card(10pcs)
Product name : EM4305 card(10pcs)
Item : EM4305 card
Price : 9
Details :

EM4305 card

Price: $9 US Dollar




Read and writeable, can be used to copy em4100 card etc.
thin card.

thick card



datasheet here.


1. 100% brand new and high quality

2. Frequency: 125 KHz

3. Thickness:0.9mm

4. Size: 85mm x 54mm x 0.9mm

5. Package included: 10pcs RFID Writable Cards.

6. Material: PVC

7. R eading distance is 0 - 10cm 

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.

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 100% 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).
• 512 bit EEPROM organised 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 in Read Only
• Two data encodings: Manchester and Biphase
• Multi-purpose data rate: 8, 16, 32 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
• 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 x 1.4 x 0.46 mm
Animal Identification according to ISO FDX-B
Pigeon races standard
Waste management standard (BDE)
Access Control

Package List


EM4305 thin card x 10


About Shipping


We will dispatch the items when received the payment.

Shipping time and cost(for reference only):
USD8    for   China post air mail:               20 business days or more     
USD28  for   DHL or EMS:                        about 5 bussiness days                     

Express company need the following information to delivery a parcel:

Phone number:
Post code:


Payment Method Accepted

We accept Paypal, WireTransfer and Wester Union payment.
Please contact us for payment.

  Contract us 

E-mail: or
Phone: +86-013113330725


Return & Replacement Terms & Conditions

Buyer can return the item in the original package within 7 days upon receiving if you are not happy with it. We will refund you or send replacement to you within 3 working day after the item is received. 

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