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UHF 860–960 MHzImpinj

Impinj M781

RAIN RFID tag chip in the M700 series with large memory banks for attribute storage and tracking.

Official Datasheet ↗
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)
Temp Range
-40°C to +85°C
Form Factor
Die/wafer for inlay integration

Full Specifications

ManufacturerImpinj
Frequency CategoryUHF 860–960 MHz
Frequency860–960 MHz (UHF)
ProtocolEPC Class 1 Gen 2 (ISO/IEC 18000-63), RAIN RFID
Memory128-bit EPC, 64-bit TID, 128-bit User Memory, 80-bit access/kill passwords
InterfaceRF (contactless)
Temperature Range-40°C to +85°C
Form FactorDie/wafer for inlay integration
Security32-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.

Typical Applications

  • Retail apparel and footwear item-level tagging
  • Inventory management and supply chain tracking
  • Asset tracking and authentication
  • Brand protection and anti-counterfeiting
  • High-performance logistics applications
  • Consumer engagement and product lifecycle management

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