MIFARE Classic 1K vs ST25DV
MIFARE Classic 1K offers 1024 bytes memory with Crypto-1 (broken) security, making it ideal for legacy transit cards, access control (legacy systems). ST25DV provides 4-64 Kbit with 64-bit password + configurable areas security, suited for IoT sensors, smart labels, energy harvesting, BLE pairing.
MIFARE Classic 1K
ST25DV
MIFARE Classic 1K vs ST25DV
ST25DV is an STMicroelectronics dual-interface dynamic NFC tagNFC tagPassive unpowered device storing data, powered by reader's RF fieldView full → — part RFID chip, part I2C peripheral — targeting IoT sensor and smart label applications. MIFARE Classic 1K is a legacy proximity card. Their overlap in real deployments is minimal.
Overview
MIFARE Classic 1K: ISO 14443ISO 14443Standard for contactless smart cards at 13.56 MHz (Types A and B)View full →-3A proximity card, 1,024 bytes, Crypto-1Crypto-1Broken proprietary cipher in MIFARE Classic (reverse-engineered 2008)View full → (broken), designed for reader-initiated tap interactions.
ST25DV implements ISO 15693ISO 15693Standard for vicinity-range smart cards, 1+ meter read rangeView full → (NFC-V) for the RF interface and exposes an I2C interface for the host microcontroller. This dual-port architecture lets a host MCU write sensor readings, configuration, or status data to the tag's NDEF memory, which an NFC readerNFC readerActive device generating RF field to initiate communication with tagsView full → or smartphone can then read wirelessly — without the MCU needing to be powered during the RF read. ST25DV also supports energy harvesting: the RF field can power external low-energy circuitry via the V_EH pin. Memory options are 4 Kbit, 16 Kbit, and 64 Kbit.
Key Differences
- Interface: Classic 1K is RF-only. ST25DV adds an I2C host interface — it acts as a shared memory between an MCU and an NFC reader.
- Standard: Classic uses ISO 14443-A; ST25DV uses ISO 15693 (NFC-V, longer range).
- Energy harvesting: ST25DV can deliver power to external circuits from the RF field, enabling battery-assisted or fully passive sensor nodes.
- Memory: ST25DV offers up to 64 Kbit (8 KB) across configurable RF-accessible areas with independent password protectionpassword protection32-bit access control for memory areas (plaintext transmission)View full →.
- Use case: Classic 1K is a card chip. ST25DV is an IoT interface chip.
Technical Comparison
| Parameter | MIFARE Classic 1K | ST25DV |
|---|---|---|
| Standard | ISO 14443-3A | ISO 15693 (NFC-V) |
| Host interface | None (RF only) | I2C + RF (dual port) |
| Memory | 1,024 bytes | 512 B – 8 KB (4/16/64 Kbit) |
| Read range | 0–10 cm | 0–100 cm |
| Energy harvesting | No | Yes (V_EH pin) |
| Security | Crypto-1 (broken) | 64-bit password per area |
| Memory areas | 16 sectors | Up to 4 configurable areas |
| NDEF support | No | Yes |
| MCU connectivity | No | I2C (400 kHz / 1 MHz) |
| Typical cost (volume) | $0.10–$0.25 | $0.50–$1.50 |
Use Cases
MIFARE Classic 1K
Legacy access control and transit in existing Classic infrastructure.
ST25DV
- IoT sensor nodes where a host MCU writes data and an NFC phone reads it
- Smart labels on medical devices, industrial equipment, or perishable goods
- BLE device pairing via NFC (MCU writes BLE pairing data to ST25DV NDEF; phone reads it)
- Battery-less sensor data loggers powered by RF energy harvesting
- Configuration and diagnostics interfaces on embedded systems
Verdict
Classic 1K and ST25DV serve entirely different system architectures. Classic 1K is a standalone card chip for human-carried credentials. ST25DV is a component in an IoT or smart label system where an MCU and NFC reader share memory. Choose ST25DV for any application requiring MCU-to-NFC-reader data bridging, energy harvesting, or smart label functionality. Neither is a substitute for the other.
คำแนะนำ
Choose MIFARE Classic 1K when you need massive installed base, widely available; choose ST25DV when you need dual-interface (NFC + I2C) with energy harvesting.