Infineon Technologies SLS32AIA020X4USON10XTMA4

Overview

SLS32AIA020X4USON10XTMA4 from Infineon is a Common Criteria EAL6+ certified embedded security controller implementing mutual authentication via ECDSA, DTLS client (RFC 6347), and USB Type-C™ Authentication standard compliance. It features 10 kB user memory, ECC NIST P256/P384, AES-128 (via DTLS), SHA-256, TRNG/DRNG, and operates in −25°C to +85°C standard temperature range in PG-USON-10-2 package.

For engineers reviewing the SLS32AIA020X4USON10XTMA4 datasheet, SLS32AIA020X4USON10XTMA4 pinout, SLS32AIA020X4USON10XTMA4 application, or SLS32AIA020X4USON10XTMA4 equivalent, key selection criteria include I²C Fast Mode Plus (1 MHz) interface timing, pre-provisioned X.509 certificate storage capacity, tamper-resistant NVM architecture, and hardware-accelerated ECDH key exchange support for secure boot and firmware update chains.

Technical Context

The device implements a dedicated security co-processor architecture with isolated crypto engine, protected non-volatile memory, and Device Security Monitor for real-time tamper detection and response. Its firmware includes preloaded OCP (OPTIGA™ Crypto and Protected Communication) library enabling DTLS handshake offload and mutual authentication without host-side crypto stack dependency.

It supports Infineon's proprietary IFX I²C protocol over standard I²C physical layer, requiring specific command framing and error handling per Appendix A. Power management includes low-power sleep mode with wake-on-I²C activity, and startup sequencing distinguishes cold power-on from warm reset behavior per Section 5.1.6.

Key Specifications

Pinout & Package

PG-USON-10-2 is a 10-pin, 3 mm × 3 mm, 0.4 mm pitch ultra-thin small outline no-lead package with wettable flanks, optimized for space-constrained IoT edge nodes and USB-C accessories.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar embedded security controller applications.

Compared with STSAFE-A110 and MAX32520, SLS32AIA020X4USON10XTMA4 delivers the narrowest integration footprint and fastest time-to-secure-boot due to preloaded OCP firmware and USB-C Authentication compliance - critical for volume consumer and industrial edge designs where BOM count and qualification cycles are constrained.

Availability

SLS32AIA020X4USON10XTMA4 is available at Aetrix Electronics and suitable for industrial control systems, smart home gateways, medical sensor nodes, and USB-C authentication modules requiring stable component supply across multi-year production lifecycles.

Supply support for SLS32AIA020X4USON10XTMA4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive MCUs, and hardware security solutions, with over 20 billion security controllers shipped globally.

SLS32AIA020X4USON10XTMA4 belongs to the OPTIGA™ Trust X product line, designed specifically to provide turnkey, pre-provisioned security for resource-constrained IoT endpoints requiring mutual authentication, secure communication, and platform integrity without host software development overhead.

FAQ

Does SLS32AIA020X4USON10XTMA4 support TLS 1.3?

No. The device implements DTLS 1.2 (RFC 6347) as its primary secure transport protocol and does not support TLS 1.3 handshake or record layer. Its OCP library is optimized for UDP-based DTLS mutual authentication and encrypted payload exchange, not TCP-based TLS negotiation.

Can the 10 kB user memory be partitioned for different certificate types?

Yes. Memory is logically segmented into four X.509 certificate slots (each up to ~1.1 kB), four ECC key pairs, and arbitrary data objects. The Host Software Library provides APIs to allocate, read, write, and delete objects with access control policies enforced by the on-chip security monitor.

What is the maximum I²C clock frequency supported in Fast Mode Plus?

The device supports I²C Fast Mode Plus up to 1 MHz under standard load conditions (400 pF bus capacitance, 2.2 kΩ pull-ups). Electrical characteristics in Section 5.1.2 specify t_LOW ≥ 0.5 µs and t_HIGH ≥ 0.26 µs, requiring precise timing alignment in host driver implementation.

Is the TRNG NIST SP 800-90A/B/C compliant?

Yes. The TRNG is certified to NIST SP 800-90B (entropy source) and SP 800-90C (RBG construction), validated as part of the Common Criteria EAL6+ evaluation. Output entropy rate is ≥ 2.5 bits per sample, with continuous health testing per AIS-31.