Impinj M781
The Impinj Impinj M781 is an UHF 860–960 MHz RFID tag IC, with 128-bit EPC, 64-bit TID, 128-bit User Memory, 80-bit access/kill passwords, operating at 860–960 MHz (UHF), under EPC Class 1 Gen 2 (ISO/IEC 18000-63) RAIN RFID.
RAIN RFID tag chip in the M700 series with large memory banks for attribute storage and tracking.
Full Specifications
| Manufacturer | Impinj |
|---|---|
| Frequency Category | UHF 860–960 MHz |
| Frequency | 860–960 MHz (UHF) |
| Protocol | EPC Class 1 Gen 2 (ISO/IEC 18000-63), RAIN RFID |
| Memory | 128-bit EPC, 64-bit TID, 128-bit User Memory, 80-bit access/kill passwords |
| Interface | RF (contactless) |
| Temperature Range | -40°C to +85°C |
| Form Factor | Die/wafer for inlay integration |
| Security | 32-bit access password, 32-bit kill password, AutoTune, Cryptographic authentication (Impinj Authenticity) |
Engineering Brief
The Impinj M781 is an advanced UHF RAIN RFID tag chip from the M700 series, operating in the 860–960 MHz global UHF bands with EPC Gen 2v2 compliance. It features enhanced memory capacity including 128-bit user memory banks for storing product attributes, serialization data, and authentication credentials. The chip integrates Impinj's AutoTune technology for improved read performance across varying tag mounting surfaces and includes cryptographic authentication features for brand protection. Designed for high-volume item-level tagging in retail, logistics, and authentication applications where extended memory and security are critical.
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Typical Applications
Standards & Compliance
Frequently Asked Questions
What memory capacity does the Impinj M781 have?
The M781 features 128-bit EPC memory, 64-bit TID, 128-bit user memory, and 80-bit access/kill password memory. The user memory bank allows storage of product attributes, serialization data, and authentication credentials for item-level tracking.
Does the Impinj M781 support cryptographic authentication?
Yes, the M781 includes Impinj Authenticity cryptographic authentication features designed for brand protection and anti-counterfeiting applications. It also supports standard 32-bit access and kill passwords for basic security.
What is AutoTune technology in the Impinj M781?
AutoTune is Impinj's proprietary technology that automatically adjusts the chip's antenna tuning to optimize read performance across different tag mounting surfaces, including challenging materials like metal and liquids.
What frequency range does the Impinj M781 operate on?
The M781 operates in the 860–960 MHz UHF frequency band, covering global RAIN RFID regions. It is compliant with EPC Class 1 Gen 2v2 and ISO/IEC 18000-63 standards.
What are typical applications for the Impinj M781 chip?
The M781 is designed for high-volume item-level tagging in retail inventory management, supply chain logistics, and brand authentication. Its extended memory and cryptographic features make it ideal for applications requiring both tracking and security.
Is the Impinj M781 compatible with standard RAIN RFID readers?
Yes, the M781 is fully compliant with EPC Class 1 Gen 2 (ISO/IEC 18000-63) and works with any standard RAIN RFID reader operating in the 860–960 MHz UHF band.
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