ST25DV04K

Product overview

Description

The ST25DV04K, ST25DV16K and ST25DV64K devices (hereinafter referred collectively to as ST25DVxxx) 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 ST25DVxxx 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 RF field detection, RF activity in progress, or mailbox message availability. An energy harvesting feature is also available, when external conditions make it possible.

All features
I2C interface

Two-wire I²C serial interface supports 1 MHz protocol

Single supply voltage: 1.8 to 5.5 V

Multiple byte programming (up to 256 bytes)

Contactless interface

Based on ISO/IEC 15693

NFC Forum Type 5 tag, certified by the NFC Forum

Supports all ISO/IEC 15693 modulations, coding, sub-carrier 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 4) blocks write (same for extended commands)

Internal tuning capacitance: 28.5 pF

Memory

Up to 64 kbits 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 byte
From RF: typical 5 ms for 1 block

Data retention: 40 years

Write cycles endurance:
1 million at 25 °C
600 k at 85 °C
500 k at 105 °C
400 k at 125 °C

Fast transfer mode

Fast data transfer between I²C and RF interfaces

Half-duplex 256-byte dedicated buffer

Energy harvesting

Analog output pin to power external components

Data protection

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 one 64-bit password in RF, and one 64-bit password in I²C
GPO

Interruption pin configurable on multiple RF events (field change, memory write, activity, Fast Transfer end, user set/reset/pulse)

Open drain or CMOS output (depending on version)

Low power mode (10-ball and 12-pin packages only)

Input pin to trigger low power mode

RF management

RF command interpreter enabled/disabled from I²C host controller

Temperature range

Range 6:
From -40 to 85 °C

Range 8:
From -40 to 105 °C (UDFPN8 and UDFPN12 only)
From -40 to 125 °C (SO8N and TSSOP8 only, 105 °C max on RF interface)

Package

8-pin, 10-ball and 12-pin packages

ECOPACK2 (RoHS compliant)
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