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AS3956 Datasheet(PDF) 1 Page - ams AG |
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AS3956 Datasheet(HTML) 1 Page - ams AG |
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1 / 109 page  ams Datasheet Page 1 [v1-10] 2018-Apr-27 Document Feedback AS3956 NFC Forum Compliant Dynamic Tag AS3956 NFC Dynamic Tag IC is the ultimate solution to easily add NFC functionality to electronic devices. Thanks to a high sensitivity ISO14443A frontend and high integrated resonance capacitor, AS3956 offers standalone NFC passive tag functionality in a small footprint. Fast system integration and high speed data transfer are guaranteed by the available SPI and I²C interfaces and by the optimized protocols (Tunneling Mode and Extended Mode), allowing bidirectional communication between the device microcontroller and an external NFC compliant device or ISO14443A reader device (PCD). AS3956 is able to operate fully powered by the RF field, without any external supply. This, combined with an advanced energy harvesting feature, greatly increases battery life time or even allows battery-less designs. AS3956 is used with an appropriate antenna coil connected to the terminals LC1 and LC2, and behaves as a standard passive ISO 14443A tag (PICC). After the anti-collision protocol stage, based on configuration, AS3956 can operate as a standalone NFC Forum Type 2 Tag or, when tunneling mode is activated, as a bridge between the PCD and the microcontroller, e.g. to emulate a custom or standard ISO14443A Level 3 or Level 4 PICC or a NFC Forum tag. A configurable wake-up signal notifies the microcontroller on ongoing RF activities, in order to minimize overall power consumption. AS3956 includes an embedded EEPROM memory that can be accessed from the PCD through the RF link or from the microcontroller through the SPI or I²C interfaces. Part or all memory can be protected by a 32-bit password, or permanently locked. AS3956 supports ISO 14443A up to Level 4 and is designed according to EMVCo requirements, to enable the emulation of contactless smart cards or NFC Forum compliant Type 2 or Type 4 Tags. AS3956 is designed for high reliability, and can operate in a wide power supply range from 1.65V to 5.5V, in a wide temperature range from -40°C to 125°C. EEPROM memory reaches automotive grade quality with endurance of 100000 cycles and data retention of 10 years at 125°C. Ordering Information and Content Guide appear at end of datasheet. Mandatory Documentation Application Note AN02: Dual Interface Data Integrity General Description |
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