Custom EM4305 RFID Card

What  is an EM4305 Card, and how does it function?

The EM4305 RFID Card, also known as the EM4305 proximity card, is a PVC or PET-based 125KHZ RFID card. It's a common access card that you've probably used but don't recognize. What's the difference between memory cards EM4305 and EM4200? The key difference is that the EM4200 card can only read data, whereas the EM4305 card can read and write data.

The EM4305 RFID Card features 32-bit password read and write protection, low power consumption, 512-bit EEPROM, no external supply buffer capacitor requirement, and compatibility with the EM4469/4569 family, among other features. It's also reasonably priced, thus it's widely used in low-cost monitoring and identification applications like university, community, library, parking lot, and so on.

How does EM4305 card  function ?

It's perfect for low-cost applications like animal identification. The IC communication protocol is compatible with the EM4469/4569 chipset. The EM4305 version of the circuit includes larger pads and gold bumps for the two coil inputs. Without the use of a module support, these pads are meant to connect directly to an antenna. In addition to the usual common values, the EM4305 can be ordered with a 330pF resonant capacitor. The IC reads data from its internal EEPROM and transmits it out by turning on and off a resistive load in parallel to the coil using a large modulation index. Commands and EEPROM data updates can be carried out using 100 percent AM modulation of the 125 kHz magnetic field. The EM4305 supports a number of bi-phase and Manchester data encodings.

The operational modes are stored in the EEPROM configuration word. All EEPROM words can be made write-protected by placing protection bits on them. The IC is factory-programmed with a 32-bit UID number.

An external coil picks up a continuous 125 kHz magnetic field, which forms a resonant circuit with the inbuilt capacitor, driving the IC. The IC reads data from its internal EEPROM and transmits it out by turning on and off a resistive load in parallel to the coil using a large modulation index. Commands and EEPROM data updates can be carried out using 100 percent AM modulation of the 125 kHz magnetic field.

Custom EM4305 RFID Card Feature:

If you want to custom the EM4305 RFID card, you have to know learn the characteristic of the EM4305 chip that plays a core role in the EM4305 card. 

512-bit EEPROM divided into 16 32-bit words

Unique identification of 32 bits (UID)

Read and write protection using a 32-bit password

Compliant with ISO 11784 / 11785

EEPROM words are converted to Read Only using the Lock function.

Manchester and Bi-phase are two data encodings.

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

Reader Talk First feature

High performance and minimal power consumption

Communication protocol EM4469/EM4569 compatible

Frequency range of 100 to 150 kHz

On-chip voltage limiter and rectifier

There is no requirement for an external supply buffer capacitor.

Temperature range: -40°C to +85°C

Power usage is quite low.

Large bumping pads (200 x 400 m) for direct coil connection (EM4305)

EM4205: Mask-selectable resonant capacitors in two sizes: 210pF and 250pF. The resonant capacitor can be trimmed at the factory to provide accuracy within a 3 percent tolerance.

EM4305: mask-selectable resonant capacitor variants of 210pF, 250pF, or 330pF

2 connections; body 1.1 * 1.4 * 0.46 mm; available in plastic ultra thin compact outline package

Why  you custom RFID cards from us?

What are the benefits of our EM4305 card over other similar products available on the market?

DO RFID Group has over ten years of RFID production expertise, and millions of RFID cards have been exported around the world.

To assure the high quality of our RFID cards, we use professional production equipment and expert operators that use precision printing and cutting technologies.

Our EM4305 card will be free of quality issues such as chip instability, color differences, surface blisters, roughness, and so on.

Furthermore, you can have the highest-quality EM4305 card at a low cost.