ST53G (ST31G + STS3922) Secure SIP product for optimized wearable (Card emulation)

The ST53G device is an all-in-one secure solution that includes the STS3922 near-field communication (NFC) booster and a secure element (SE) certified by EMVCo and available in different memory sizes ranging from 256 to 480 Kbytes (ST31G480, ST31G384, ST31G320 or ST31G256).

Fully manufactured in a secure environment, the ST53G provides the highest performance levels thanks to the ARM® SC300® core of their secure element.

The ST53G is ideal for applications that require card emulation functionality, but have limited space for the antenna. This solution allows a simpler design than the conventional NFC controller-based architecture, and occupies a board footprint approximately one-third smaller.

The ST53G operates in the −25 to + 85 °C temperature range at voltages from 2.7 to 3.6 V.

It is delivered in WFBGA64 packages dimensioned for use in small-footprint devices.

In order to meet environmental requirements, ST offers the ST53G in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: ECOPACK® is an ST trademark.

Key Features

  • System in package (SiP) integrating a 32-bit secure microcontroller (ST31G480, ST31G384, ST31G320 or ST31G256) and an STS3922 booster for optimized wearable applications (card emulation boosted performance)
  • Single power supply pin (VBAT)
  • 2.7 to 3.6 V supply voltage range
  • Battery voltage supported
  • Supports Class B operating conditions
  • Ambient operating temperature range: −25 to + 85 °C
  • 10-year data retention
  • 100 000 Erase/Write cycle endurance
  • ESD protection greater than 4 kV (HBM)
  • Communication interfaces:
    • SPI
    • ISO 7816
    • ISO 14443A
  • Delivery form:
    • WFBGA64: 64-ball, 4 × 4 mm, 0.4 mm pitch, very, very thin profile, fine pitch, ball grid array package
  • Secure microcontroller
    • ARM® SecurCore® SC000™ 32-bit RISC core
    • 12 Kbytes of user RAM
    • Up to 480 Kbytes of secure, high-density user Flash memory including 128 bytes of user OTP area
    • Three 16-bit timers with interrupts
    • Watchdog timer
    • External clock frequency up to 10 MHz
    • CPU clock frequency up to 28 MHz
    • Power-saving Standby state
    • Asynchronous receiver transmitter (IART) with RAM buffer for high-speed serial data support (ISO/IEC 7816-3 T=0/T=1 compliant)
  • Booster
    • Extended read range in card emulation mode with antennas smaller than 100 mm²
    • boostedNFC technology based on active load modulation
    • Automatic power control
    • Automatic gain control
    • Low power consumption
  • Contactless features
    • EMVCo™ and ISO/IEC 14443 compliance for full interoperability with existing payment and ticketing infrastructures
    • Card emulation supporting ISO/IEC 14443 Type A at 106 kbps
    • MIFARE Plus® and MIFARE® DESFire® EV1 hardware and software implementation
    • MIFARE® Classic available as part of MIFARE Plus®
  • Security features
    • Active shield
    • Monitoring of environmental parameters
    • Three-key triple DES accelerator
    • AES accelerator
    • AIS-31 Class PTG2-compliant true random number generator (TRNG)
    • NESCRYPT coprocessor for public-key cryptography algorithms
    • ISO/IEC 13239 CRC calculation block
    • Unique serial number for each die
    • Protection against multiple attacks



Description Version Size
DB3315 DB3315: Secure system-in-package solutions for optimized wearable applications (card emulation) 1.0 205 KB


Description Version Size
Flyer ST53G Secure Module for Wearables 1.0 1006 KB
Description Version Size
Solutions for Secure Wearables brochure 1.0 1 MB