آر اف (فرکانس رادیویی) و بی‌سیم آی‌سی آر‌اف‌آی‌دی و کنترل دسترسی

Product Attributes

Introduction

The ST25DV04KC, ST25DV16KC and ST25DV64KC devices (hereinafter referred collectively to as ST25DVxxKC) are NFC RFID tags offering respectively 4, 16, and 64‑Kbit of electrically erasable programmable memory (EEPROM). These devices feature two interfaces: the first one is an I²C serial link that can be operated from a DC power supply, the second one is an RF link activated when the device acts as a contactless memory powered by the received carrier electromagnetic wave. In I²C mode, the user memory contains up to 512, 2048, or 8192 bytes, which can be split in four flexible and protectable areas. In RF mode, following ISO/IEC 15693 or NFC Forum Type 5 recommendations, the user memory contains up to 128, 512, or 2048 blocks of 4 bytes, which can be split in four flexible and protectable areas. The ST25DVxxKC devices offer a fast transfer mode between the RF and contact worlds, thanks to a 256 bytes volatile buffer (also called mailbox). In addition, the GPO pin provides data about incoming events, like the RF field detection, RF activity in progress, or mailbox message availability. An energy harvesting feature is also available, when external conditions make it possible.

Features

• Includes ST state-of-the-art patented technology
• Two-wire I²C serial interface supports 1MHz protocol
• Single supply voltage: 1.8 V to 5.5 V
• Multiple byte programming (up to 256 bytes)
• Configurable I²C slave address
• Based on ISO/IEC 15693
• NFC Forum Type 5 tag certified by the NFC Forum
• Supports all ISO/IEC 15693 modulations, coding, subcarrier modes and data rates
• Custom fast read access up to 53 kbit/s
• Single and multiple blocks read (same for Extended commands)
• Single and multiple (up to four) blocks write (same for Extended commands)
• Internal tuning capacitance: 28.5 pF
• Up to 64 Kbit of EEPROM (depending on version)
• I²C interface accesses bytes
• RF interface accesses blocks of 4 bytes
• Write time: From I²C: typical 5 ms for 1 up to 16 bytes; From RF: typical 5 ms for one block
• Data retention: 40 years
• Write cycles endurance: 1 million at 25 °C; 600k at 85 °C; 500k at 105 °C; 400k at 125 °C
• Fast data transfer between I²C and RF interfaces
• Half-duplex 256 bytes dedicated buffer
• Analog output pin to power external components
• User memory: one to four configurable areas, protectable in read and/or write by three 64-bit passwords in RF and one 64‑bit password in I²C
• System configuration: protected in write by a 64-bit password in RF and a 64-bit password in I²C
• Interruption pin configurable on multiple RF events (field change, memory write, activity, fast transfer, user set/reset/pulse), and I²C events (memory write completed, RF switch off)
• Open drain or CMOS output (depending on version)
• Input pin to trigger low power mode (10-ball and 12-pin package only)
• RF command interpreter enabled/disabled from I²C host controller
• I²C priority: immediate RF switch off from I²C
• Range 6: From -40 °C to 85 °C
• Range 8: From -40 °C to 105 °C (UDFPN8 and UFDFPN12 only); From -40 °C to 125 °C (SO8N and TSSOP8 only, 105 °C max on RF interface)
• 8-pin, 10-ball, and 12-pin packages ECOPACK2 (RoHS compliant)