NRG SLE 66R35E7
The Infineon NRG SLE 66R35E7 is an HF 13.56 MHz RFID tag IC, with 1 kByte EEPROM (16 sectors × 4 blocks × 16 bytes), operating at 13.56 MHz under ISO/IEC 14443-2 and -3 Type A with CRYPTO1.
Intelligent 1 kByte memory chip with ISO/IEC 14443-3 Type A, CRYPTO1 and 7-byte UID.
Full Specifications
| Manufacturer | Infineon |
|---|---|
| Frequency Category | HF 13.56 MHz |
| Frequency | 13.56 MHz |
| Protocol | ISO/IEC 14443-2 and -3 Type A with CRYPTO1 |
| Memory | 1 kByte EEPROM (16 sectors × 4 blocks × 16 bytes) |
| Interface | RF (contactless) |
| Temperature Range | -25°C to +70°C (chip ambient) |
| Form Factor | Die (wafer sawn/unsawn), NiAu-bump die, MCC8-2-6 module |
| Security | CRYPTO1 encryption, 48-bit key (Key A and Key B per sector), mutual three-pass authentication, 7-byte UID (or 4-byte RND-ID/FNUID configurable) |
Engineering Brief
The NRG SLE 66R35E7 is a 1 kByte EEPROM NFC chip compliant with ISO/IEC 14443-3 Type A at 13.56 MHz and 106 kbit/s. It features a 7-byte unique identifier (UID) with configurable UID modes (including 4-byte RND-ID or FNUID for legacy system compatibility) and CRYPTO1 mutual authentication with per-sector key management (Key A/B). Memory is organized into 16 sectors with user-definable access conditions, dedicated value blocks for increment/decrement operations, and supports >100,000 erase/write cycles with >10 years data retention. Targeted at transport, access control, and electronic purse applications requiring basic security and multi-application support.
Typical Applications
Standards & Compliance
Frequently Asked Questions
How much memory does the Infineon NRG SLE 66R35E7 have?
The SLE 66R35E7 has 1 kByte (1024 bytes) of EEPROM organized into 16 sectors, with each sector containing 4 blocks of 16 bytes. User-definable access conditions allow flexible memory partitioning for multi-application use.
What security features does the SLE 66R35E7 support?
The chip implements CRYPTO1 encryption with mutual three-pass authentication using 48-bit keys. Each sector can have independent Key A and Key B for granular access control, supporting read/write protection and multi-application security.
Is the SLE 66R35E7 compatible with MIFARE Classic?
Yes, the SLE 66R35E7 is functionally compatible with MIFARE Classic 1K, supporting ISO/IEC 14443-3 Type A at 106 kbit/s with CRYPTO1 authentication and the same 16-sector memory structure.
What is the UID configuration on the NRG SLE 66R35E7?
The chip features a 7-byte unique identifier (UID) and can be configured for 4-byte UID modes including random ID (RND-ID) or fixed non-unique ID (FNUID) for compatibility with legacy systems that require shorter UIDs.
How many write cycles does the SLE 66R35E7 support?
The EEPROM supports more than 100,000 erase/write cycles with data retention exceeding 10 years, making it suitable for reusable ticketing and access control applications with frequent updates.
What applications is the Infineon SLE 66R35E7 designed for?
The chip is targeted at public transport ticketing, electronic purse systems, access control, and any application requiring ISO 14443-3 Type A compatibility with basic CRYPTO1 security and multi-application memory management.
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