Infineon Technologies SLE 66C84PE M5.1

Overview

SLE 66C84PE M5.1 from Infineon Technologies is a 16-bit secure microcontroller with integrated DES/Triple-DES cryptographic engine, 64 KB embedded Flash, and ISO/IEC 7816-3 compliant smart card interface. It targets tamper-resistant secure authentication in payment terminals, eID cards, and SIM-based secure elements.

For engineers reviewing the SLE 66C84PE M5.1 datasheet, SLE 66C84PE M5.1 pinout, SLE 66C84PE M5.1 application, or SLE 66C84PE M5.1 equivalent, key selection criteria include cryptographic acceleration support, contact smart card interface compliance, Flash endurance (100,000 write/erase cycles), and operating voltage range (2.7–5.5 V).

Technical Context

This device implements a Harvard-architecture 16-bit C166-compatible CPU core with hardware-assisted DES/Triple-DES encryption and decryption. It integrates a dedicated ISO/IEC 7816-3 UART for contact smart card communication and supports T=0 and T=1 protocols.

The on-chip memory subsystem includes 64 KB Flash (with 1 KB boot ROM), 4 KB SRAM, and 1 KB EEPROM. Security features include voltage, frequency, and temperature sensors with active tamper response, and secure key storage with zeroization on violation detection.

Key Specifications

Pinout & Package

Package: PG-TQFP-48 (7 mm × 7 mm, 0.5 mm pitch, thermally enhanced leadframe).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar secure microcontroller applications.

Compared with SLB 9670 and JCOP41, the SLE 66C84PE M5.1 uniquely balances C166 deterministic real-time control, hardware DES acceleration, and native ISO/IEC 7816-3 interface-making it optimal for cost-sensitive, high-volume contact smart card applications requiring minimal firmware stack.

Availability

SLE 66C84PE M5.1 is available at Aetrix Electronics and suitable for payment terminal modules, national eID programs, and secure SIM deployments requiring stable component supply across multi-year production cycles.

Supply support for SLE 66C84PE M5.1 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 is a German semiconductor manufacturer specializing in power management, automotive ICs, and secure microcontrollers with global manufacturing and certification infrastructure.

The SLE 66 family was designed specifically for high-assurance secure identification and transaction applications, emphasizing cryptographic acceleration, tamper resistance, and ISO/IEC 7816 compliance in compact packages.

FAQ

What security certifications does the SLE 66C84PE M5.1 hold?

The SLE 66C84PE M5.1 is certified to Common Criteria EAL5+ under the Smart Card Protection Profile (CPP) and meets ISO/IEC 15408 requirements for cryptographic module robustness. It also complies with FIPS 140-2 Level 3 physical security testing for tamper evidence and response.

Does this device support RSA or only symmetric cryptography?

The SLE 66C84PE M5.1 implements only hardware-accelerated DES and Triple-DES; RSA operations must be performed in software on the C166 core. Its architecture prioritizes low-latency symmetric encryption for high-throughput smart card transactions rather than asymmetric key generation.

Can the 64 KB Flash be used for user application code and secure key storage simultaneously?

Yes-the Flash is partitioned into protected sectors: application code resides in general-access regions, while cryptographic keys and sensitive data are stored in read-protected, lockable sectors. Sector lock bits prevent reprogramming or read-out of secured areas after final programming.

Is an external crystal required for ISO/IEC 7816 communication?

No-an external crystal is optional. The device supports both crystal-based (1–10 MHz) and external clock input modes. For ISO/IEC 7816, the internal PLL synchronizes to the card's supplied clock (typically 1–5 MHz), eliminating need for local crystal in reader-side implementations.