EM4305 RFID Chip

Updated: 2026-09-19

Overview

The EM4305 RFID Chip is a low-frequency (125 kHz) transponder chip designed for secure and reliable identification applications. It operates on the EM Microelectronic platform, known for its robustness in harsh environments. The chip supports read/write functionality, making it suitable for dynamic data storage. Commonly used in access control systems, animal tagging, and industrial tracking, the EM4305 is prized for its tamper-resistant features and long read range. Its compatibility with ISO 11784/85 standards ensures global applicability, particularly in livestock management.

Structure and Working Principle

The EM4305 chip comprises a silicon-based integrated circuit paired with an antenna coil, encapsulated in a durable material like epoxy or glass. It operates passively, drawing power from the reader's electromagnetic field. Data is stored in EEPROM memory, allowing for both read and write operations. The chip communicates via amplitude-shift keying (ASK) modulation, ensuring stable data transmission even in noisy environments. Its anti-collision algorithm enables multiple tags to be read simultaneously, enhancing efficiency in high-traffic applications.

Key Features

The EM4305 offers several standout features, including a 64-bit readable and writable memory block, configurable password protection, and a unique 32-bit serial number for secure identification. Its low power consumption extends battery life in active applications. Additionally, the chip supports a read range of up to 1.5 meters, depending on the antenna design. Its resistance to environmental stressors like moisture and temperature fluctuations makes it ideal for outdoor or industrial use.

Application Areas

The EM4305 is widely used in access control systems for buildings and vehicles, where its secure data transmission prevents unauthorized entry. In agriculture, it serves as a reliable solution for livestock tagging, complying with international standards. Industrial applications include asset tracking in warehouses and manufacturing plants. Its durability also makes it suitable for laundry management in hospitals and hotels, where tags endure frequent washing and sterilization.

Maintenance and Precautions

To ensure longevity, avoid exposing the EM4305 chip to extreme temperatures (>85°C or <-25°C) or direct physical impact. Electrostatic discharge (ESD) can damage the circuitry, so handle with grounded equipment during installation. Regularly inspect the antenna for wear or corrosion, especially in outdoor applications. For embedded tags, ensure the encapsulating material is chemically inert to prevent degradation over time.

B2B Procurement Guide

When sourcing EM4305 chips, prioritize suppliers with ISO 9001 certification to guarantee quality. Bulk orders (1,000+ units) typically reduce costs by 20-30%. Verify lead times, as demand fluctuations may affect availability. Key considerations include custom encoding services and pre-programmed serial numbers. For specialized applications (e.g., medical or aerospace), request documentation of compliance with relevant industry standards.