UHF 860–960 MHzEM Microelectronic

EM4124

Name: EM Microelectronic EM4124
Brand: EM Microelectronic

The EM Microelectronic EM4124 is an UHF 860–960 MHz RFID tag IC, with 176 bits total NVM (16-bit PC Word, 96-bit EPC Code, 32-bit Kill Password, 32-bit Access Password) + 64-bit TID/UID (ROM, manufacturer-programmed and locked), operating at 860 MHz to 960 MHz (UHF), under EPC Class-1 Generation-2 (Gen2) ISO/IEC 18000-6:2010 Type C (ISO 18000-6C).

EPC Class-1 Gen-2 UHF IC with 96-bit EPC and 32-bit user memory for cost-sensitive item-level tagging.

Official Datasheet ↗

Frequency

860 MHz to 960 MHz (UHF)

Protocol

EPC Class-1 Generation-2 (Gen2), ISO/IEC 18000-6:2010 Type C (ISO 18000-6C)

Memory

176 bits total NVM (16-bit PC Word, 96-bit EPC Code, 32-bit Kill Password, 32-bit Access Password) + 64-bit TID/UID (ROM, manufacturer-programmed and locked)

Interface

RF (contactless, passive UHF RFID)

Temp Range

-40°C to +85°C

Form Factor

Die (582 × 636 µm), available as sawn wafer with gold bumps, 6 mils (152 µm) / 7 mils (178 µm) / 11 mils (280 µm) thickness

Full Specifications

Manufacturer	EM Microelectronic
Frequency Category	UHF 860–960 MHz
Frequency	860 MHz to 960 MHz (UHF)
Protocol	EPC Class-1 Generation-2 (Gen2), ISO/IEC 18000-6:2010 Type C (ISO 18000-6C)
Memory	176 bits total NVM (16-bit PC Word, 96-bit EPC Code, 32-bit Kill Password, 32-bit Access Password) + 64-bit TID/UID (ROM, manufacturer-programmed and locked)
Interface	RF (contactless, passive UHF RFID)
Temperature Range	-40°C to +85°C
Form Factor	Die (582 × 636 µm), available as sawn wafer with gold bumps, 6 mils (152 µm) / 7 mils (178 µm) / 11 mils (280 µm) thickness
Security	32-bit password-protected Kill command, 32-bit password-protected Access command, optional Deactivate function (mute version), 64-bit unique identifier (TID/UID) factory-locked

Engineering Brief

The EM4124 is a certified EPC Class-1 Gen-2 UHF RFID IC compliant with ISO 18000-6C, operating at 860-960 MHz for global supply chain applications. It features 176 bits of user-programmable non-volatile memory (96-bit EPC, 32-bit passwords) plus a factory-locked 64-bit unique identifier for full traceability. With a typical read sensitivity of -19 dBm at chip level (-21 dBm at tag level), extended temperature range (-40°C to +85°C), and support for Multi-vendor Chip-based Serialization (MCS), the device enables cost-effective item-level tagging. Optional deactivate/reactivate functionality addresses privacy concerns in retail applications, while custom GetUID command provides fast access to the unique identifier.

Free tools for this chip

Tool
UHF Read-Range Estimator
Friis-equation range for this chip's sensitivity.

Typical Applications

Standards & Compliance

ISO/IEC 18000-63 (EPC Gen2)

Frequently Asked Questions

What is the read range of the EM4124 UHF RFID chip?

The EM4124 achieves a typical read sensitivity of -19 dBm at chip level and -21 dBm at tag level. Actual read range depends on antenna design, reader power, and environmental conditions, but typical implementations achieve several meters in free space.

How much EPC memory does the EM4124 have?

The EM4124 provides a 96-bit EPC code for product identification, along with a 16-bit Protocol Control Word, 32-bit Kill Password, and 32-bit Access Password. It also includes a factory-programmed, locked 64-bit unique identifier (TID).

Is the EM4124 compliant with EPCglobal Gen2 standards?

Yes, the EM4124 is fully certified for EPC Class-1 Generation-2 (Gen2) and complies with ISO/IEC 18000-6:2010 Type C (ISO 18000-6C) standards, making it compatible with global RFID infrastructure.

What is the operating temperature range of the EM4124?

The EM4124 operates across an extended temperature range of -40°C to +85°C, suitable for harsh industrial, logistics, and outdoor environments.

Does the EM4124 support password protection?

Yes, the EM4124 features 32-bit password-protected Access and Kill commands to prevent unauthorized reading, writing, or permanent deactivation of the tag. It also supports an optional Deactivate function for privacy applications.

What is Multi-vendor Chip-based Serialization on the EM4124?

MCS (Multi-vendor Chip-based Serialization) on the EM4124 allows access to the factory-programmed 64-bit unique TID/UID, enabling fast serialization and traceability without requiring EPC programming during tag manufacturing.

Explore

Manufacturer

All EM Microelectronic chips →

Standards

ISO/IEC 18000-63 (EPC Gen2)

Applications

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