Chip vs Chip

NTAG213 vs ST25DV

NTAG213 offers 144 bytes memory with 32-bit password security, making it ideal for NFC business cards, URL tags, small data records. ST25DV provides 4-64 Kbit with 64-bit password + configurable areas security, suited for IoT sensors, smart labels, energy harvesting, BLE pairing.

NTAG 213

ファミリーNTAG
メモリ180 bytes (user: 144 B)
価格$0.050 – $0.150

ST25DV

ファミリーST25
メモリ4096 bytes (user: 4096 B)
価格$0.400 – $1.000

NTAG213 vs ST25DV: Basic NFC Tag vs. Dynamic Dual-Interface Tag

NTAG213 is a passive, single-interface NFC tagNFC tagFundamentalsPassive unpowered device storing data, powered by reader's RF fieldClick to view →. ST25DV from STMicroelectronics is an entirely different category of device: a dynamic dual-interface tag that bridges the NFC wireless world with the I2C wired world, enabling entirely new application architectures.

Overview

NTAG213 is read and written exclusively over its NFC RF interface. It stores static or semi-static NDEF data and has no secondary interface. It is optimal for passive tagging applications with no embedded processing.

ST25DV is an ISO 15693 (NFC-V) dual-interface IC with simultaneous NFC RF and I2C wired access. A microcontroller can write data via I2C, and a smartphone (or any NFC-V reader) can read that data over RF — enabling the tag to act as a wireless display of live sensor values, device status, or configuration parameters. It also supports energy harvesting — extracting DC power from the RF field to supply a connected MCU.

Key Differences

  • Interface: NTAG213 — RF only. ST25DV — RF (ISO 15693ISO 15693Standards & ProtocolsStandard for vicinity-range smart cards, 1+ meter read rangeClick to view → / NFC-V) + I2C simultaneously.
  • Dynamic content: NTAG213 stores static NDEF. ST25DV stores MCU-updated live data — temperature, battery level, device state — readable over NFC.
  • Energy harvesting: ST25DV can extract up to 5 mW from an NFC readerNFC readerFundamentalsActive device generating RF field to initiate communication with tagsClick to view → field to power external circuitry. NTAG213 has no equivalent.
  • Protocol: NTAG213 — NFC-A (ISO 14443ISO 14443Standards & ProtocolsStandard for contactless smart cards at 13.56 MHz (Types A and B)Click to view →-A). ST25DV — NFC-V (ISO 15693). Different RF layers.
  • Memory: NTAG213 — 144 bytes. ST25DV — 4/16/64 KB EEPROMEEPROMHardwareNon-volatile memory technology retaining data without powerClick to view → accessible via both interfaces.
  • Smartphone support: NTAG213 — universally supported. ST25DV (NFC-V) — supported on Android; iOS support is limited (iOS 14+ with some restrictions).
  • Application complexity: NTAG213 is a pure passive tagpassive tagHardwareBatteryless tag powered by reader's electromagnetic fieldClick to view →. ST25DV requires an MCU and I2C firmware to realize its unique value.

Use Cases

Choose NTAG213 when: - Static data delivery (URL, vCard) is sufficient - No microcontroller or wired interface is involved - Maximum simplicity and cost-efficiency are required

Choose ST25DV when: - A device must publish live data (sensor readings, status) wirelessly via NFC - Energy harvesting from NFC reader field is needed to power circuitry - An MCU needs bidirectional communication via both I2C and NFC RF - IoT device configuration via smartphone tap is a design goal

Verdict

NTAG213 and ST25DV address entirely different design problems. NTAG213 is a passive label. ST25DV is an embedded interface chip for IoT and smart device applications. Select ST25DV only when an I2C-connected MCU is part of the design; otherwise, NTAG213's simplicity and ubiquity make it the correct choice.

おすすめ

Choose NTAG213 when you need lowest cost NFC Forum Type 2 tag; choose ST25DV when you need dual-interface (NFC + I2C) with energy harvesting.