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


Technical Documentation

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

Publications and Collaterals

Description Version Size
Brochure Secure MCUs - Payment and Identification Secure solutions 1.0 1 MB
Brochure_Secure MCUs_Secure Soluions_RS6103_BRSMCU0616.pdf 1 MB
Support & Community

Sample & Buy

Part Number Package Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
ST53G WFBGA 4X4X0.8 64L 0.4 P STACKED Active - - 5A002A1A 5A002A1A FRANCE MORE INFO No availability reported, please contact our Sales office

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
ST53G ActiveWFBGA 4X4X0.8 64L 0.4 P STACKEDIndustrialN/A

(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.