AS3955 NFC Forum Compliant Dynamic Tag AS3955 NFC Dynamic Tag IC is the ultimate solution to easily General Description add NFC functionality to electronic devices. Thanks to a high sensitivity ISO14443A frontend and high integrated resonance capacitor, AS3955 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 IC 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). AS3955 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 batteryless designs. AS3955 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, AS3955 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. AS3955 includes an embedded EEPROM memory that can be accessed from the PCD through the RF link or from the microcontroller through the slave SPI or IC interfaces. Part or all memory can be protected by a 32-bit password, or permanently locked. AS3955 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. AS3955 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 -40C to 125C. EEPROM memory reaches automotive grade quality with endurance of 100000 cycles and data retention of 10 years at 125C. Ordering Information and Content Guide appear at end of datasheet. ams Datasheet Page 1 v2-03 2017-Sep-15 Document FeedbackAS39 55 Gene ral Des c rip t ion Key Benefits & Features The benefits and features of AS3955, NFC Forum Compliant Dynamic Tag are listed below: Figure 1: Added Value of Using AS3955 Benefits Features Type 2 Tag standalone functionality Type 2 or 4 Tag emulation with external MCU NFC Forum compliance for full interoperability ISO 14443A Level 3 or 4 card emulation with external MCU Operating frequency at 13.56 MHz NFC Forum compliance Bit rate at 106 kbps ISO 14443A compliance up to Level 4 7-byte UID Choice of memory size based on application 4 kbit EEPROM (472 bytes of user data) Allows zero-power standby Configurable passive wake-up interrupt Enables long battery life time, or batteryless Energy harvesting to supply up to 5mA 4.5V designs (regulated) Allows fast antenna prototyping (ISO antenna 45 pF integrated resonant capacitor classes 1 to 6) 3/4-wire SPI slave interface up to 5 Mbps Design flexibility, easy integration. Fits requirements for various embedded applications IC slave interface up to 1 Mbps Design flexibility, easy integration Programmable IC address Fits supply requirements for various applications, Wide interface supply range (1.65V to 5.5V) including industrial Support for multiple applications, and storage of 32-bit password memory protection sensitive data High performance and robust data Tunneling and Extended modes for MCU communication, allows custom protocols to be communication implemented Consistent NFC behavior of battery supplied Silent mode (MCU power status detection), devices in e.g. pairing applications configurable between 1.42V and 3.65V Possibility to disable RF communication Configurable Chip Kill mode Sawn wafer Small outline, compatibility to common inlay and WL-CSP package (2.125mm x 1.42 mm) 0.4mm card manufacturing lines, surface-mount pitch thick 600m, thin 316m typ assembly 10-pin MLPD 3mm x3mm x0.9mm package Page 2 ams Datasheet Document Feedback v2-03 2017-Sep-15