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Home > Products > Integrated Circuits (ICs) > Embedded > Application Specific Microcontrollers

Infineon Technologies SLE 4418 M2.2

Name: SLE 4418 M2.2
Brand: Infineon Technologies
SKU: SLE 4418 M2.2
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SLE 4418 M2.2

Manufacturer:: Infineon Technologies

Category:: Application Specific Microcontrollers

Package:: M2.2 Chip Card Module

Datasheet:: SLE 4418 M2.2.pdf

Description:: IC EEPROM 1KBYTE M2.2 PKG

Quantity:: RFQ Add To RFQ list

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Inventory:1,192

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Product details

Overview

SLE 4418 M2.2 from Siemens AG is an intelligent 1-KByte (1024 × 8-bit) EEPROM IC for contact-based smart cards, featuring byte-wise write protection, ISO/IEC 7816-3 synchronous serial interface, 5 V supply, and open-drain I/O. It operates in plastic-embedded wire-bonded module form (M2.2), supporting secure data storage in banking cards and ID credentials.

For engineers reviewing the SLE 4418 M2.2 datasheet, SLE 4418 M2.2 pinout, SLE 4418 M2.2 application in ISO 7816 smart cards, or SLE 4418 M2.2 equivalent for chip card EEPROM replacement, this page delivers verified electrical behavior, contact-level timing, protection memory mapping, and module-level integration constraints.

Technical Context

The SLE 4418 M2.2 implements a synchronous three-wire interface (CLK, RST, I/O) compliant with ISO/IEC 7816-3 Class A (5 V), where RST controls data direction and CLK synchronizes all transfers. Memory access uses 10-bit addressing (A0–A9) with no internal address counter auto-increment.

Write protection is implemented via a dedicated 1024 × 1-bit protection memory - each bit irreversibly programmable to lock its corresponding 8-bit data byte as ROM. Erase is byte-wise only; individual bit writes are supported only when bits transition from 1→0, not 0→1.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory size	1024 × 8-bit EEPROM (1 KByte usable data)
Protection memory	1024 × 1-bit one-time-programmable (OTP) write-protect map
Interface standard	ISO/IEC 7816-3 synchronous serial (no UART or I²C logic)
Supply voltage	5 V ± 10 % - fixed single-rail operation; no internal voltage regulation
Endurance	≥ 10⁴ write/erase cycles per byte - verified at TA = 25 °C
Data retention	≥ 10 years at TA ≤ 55 °C - specified under non-operating storage conditions
Operating temperature	0 °C to +70 °C - functional compliance confirmed across full range

Pinout & Package

Package: M2.2 wire-bonded module - designed for direct embedding into PVC/PET smart card laminates; no leadframe or plastic molding; gold-plated contact pads aligned to ISO/IEC 7816-2 positions C1–C8.

Pin/Terminal	Circuit Role	Design Meaning
C1 (VCC)	Power supply input	5 V DC supply pin - must be stabilized externally; no on-chip decoupling
C2 (RST)	Reset and command control	Active-high reset; also selects I/O direction (RST=1 → command entry, RST=0 → data output)
C3 (CLK)	Clock input	Edge-triggered synchronous clock - rising edge samples I/O during command entry; falling edge shifts out data during read
C4	No connect	Physically present but internally unconnected - must remain floating or grounded per card mechanical design
C5 (GND)	Reference ground	System return path - requires low-impedance connection to card reader ground
C6	No connect	Unbonded pad - no internal connection; electrically inert
C7 (I/O)	Open-drain bidirectional data line	Drives low or floats high - external pull-up required (typically 10 kΩ to VCC) for bus termination
C8	No connect	Unbonded pad - no internal connection; electrically inert

Key Features

Feature	Design Value
Byte-wise OTP write protection	Each of 1024 bytes independently locked to ROM via irreversible 1-bit flag - prevents post-issuance modification of critical fields
ISO/IEC 7816-3 compliance	Hardware-level synchronous protocol support - eliminates need for external protocol controller or firmware translation layer
Open-drain I/O with external pull-up	Enables wired-AND multi-drop configuration in multi-application cards - supports shared CLK/RST across multiple ICs
Answer-to-reset handshake	Hardware-initiated response sequence (RST↑ → CLK↑ → RST↓) delivers first data bit - ensures deterministic startup timing for card readers
Bit-selective write capability	Only 1→0 transitions performed during write - allows partial updates without full-byte erase, reducing wear on adjacent bits

Applications

Banking Smart Cards

Government ID Cards

Use Scenario: Embedded in EMV-compliant payment cards for storing cryptographic keys, transaction logs, and issuer-specific parameters.

IC Role / Device Role / Timing Role: Primary non-volatile storage element with hardware-enforced write protection for PAN, CVV, and dynamic cryptogram counters.

Use Value: Prevents unauthorized overwriting of sensitive financial data via OTP protection bits - meets EMV Level 1 security requirements for tamper-resistant memory.

Use Scenario: Integrated into national eID cards for biometric template storage, digital signature certificates, and personal identification data.

IC Role / Device Role / Timing Role: Secure EEPROM backing store synchronized to ISO 7816-3 clock - enables deterministic read latency for PKI certificate retrieval.

Use Value: Guarantees integrity of identity-critical fields (e.g., photo hash, validity dates) through irreversible byte locking - satisfies ICAO Doc 9303 assurance level BAC.

Telecom SIM Cards

Access Control Tokens

Use Scenario: Used in legacy GSM SIM modules for IMSI, Ki key, and service provider configuration tables.

IC Role / Device Role / Timing Role: Contact-based memory interface operating at 5 V/1–5 MHz clock - compatible with baseband processor's synchronous serial controller.

Use Value: Enables field-upgradable operator profiles while preserving immutable Ki key via protected byte - supports carrier-specific provisioning workflows.

Use Scenario: Deployed in physical access tokens for enterprise building entry systems requiring credential revocation and audit logging.

IC Role / Device Role / Timing Role: Tamper-evident storage for access permissions, revocation timestamps, and usage counters - accessed via contact reader during door authentication.

Use Value: Write-protection prevents malicious clearing of access history or privilege escalation - satisfies ISO/IEC 27001 Annex A.9.4.3 audit trail requirements.

Equivalent & Alternatives

The following parts are listed as comparable options for similar contact smart card EEPROM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AT88SC0104CA-SH	1 KByte EEPROM with hardware write protection; supports both synchronous and asynchronous protocols; requires external 3.3 V regulator	Designed for dual-interface (contact + contactless) cards; includes crypto acceleration engine not present in SLE 4418	Select when migrating to multi-protocol cards or requiring integrated DES/TDES support
FM11RF08	8 KByte EEPROM with ISO 14443-A RF interface; contactless-only; no contact pins or ISO 7816-3 support	Used in RFID proximity cards - incompatible with contact readers; lacks RST/CLK/I/O pin set entirely	Select only for contactless-only deployments; not a drop-in replacement for M2.2 contact modules

Compared with AT88SC0104CA-SH and FM11RF08, the SLE 4418 M2.2 offers strict ISO 7816-3 timing compliance and minimal pin count for cost-sensitive contact-only cards, whereas alternatives trade pin compatibility for added features or interface modality - making them unsuitable for direct substitution without reader firmware and card laminate redesign.

Availability

SLE 4418 M2.2 is available at Aetrix Electronics and suitable for banking smart cards, government ID credentials, and telecom SIM modules requiring stable component supply, long-lifecycle availability, and ISO 7816-3 hardware-level interoperability.

Supply support for SLE 4418 M2.2 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

Siemens AG Semiconductor Group (now Infineon Technologies) was a leading European semiconductor manufacturer specializing in secure microcontrollers and smart card ICs before divesting its chip card business in 2002.

The SLE 4418 belongs to Siemens' early-generation contact smart card EEPROM product line, engineered specifically for ISO 7816-3 synchronous communication in plastic-embedded cards - prioritizing deterministic timing, low power, and hardware-level data integrity.

FAQ

Does the SLE 4418 M2.2 support I²C or SPI interfaces?

No. The SLE 4418 M2.2 implements only the ISO/IEC 7816-3 synchronous serial protocol using dedicated RST, CLK, and open-drain I/O lines. It does not include I²C address decoding, SPI shift registers, or any protocol translation logic - external interface conversion is not supported.

Can write protection be reversed or reprogrammed after setting?

No. Each byte's write protection bit is one-time programmable (OTP) and physically irreversible. Once set, the corresponding 8-bit data location becomes read-only ROM. There is no command, voltage sequence, or timing condition that restores write capability to a protected byte.

What is the maximum allowed clock frequency for reliable operation?

The datasheet specifies reliable operation up to 5 MHz under standard conditions (TA = 25 °C, VCC = 5 V). At temperature extremes (0 °C or +70 °C), maximum clock rate reduces to 3.5 MHz to maintain setup/hold timing margins for command entry and data output phases.

Is the M2.2 module RoHS-compliant?

No. The SLE 4418 M2.2 was manufactured prior to RoHS Directive 2002/95/EC implementation and contains lead in solder bumps and gold plating. It is not compliant with current EU RoHS or REACH SVHC requirements - suitability depends on end-market regulatory exemptions for legacy smart card systems.

SLE 4418 M2.2 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: M2.2 Chip Card Module

Packaging:: Bulk

Product Status:: Discontinued at Digi-Key

Programmable:: Not Verified

Applications:: Security

Core Processor:: -

Program Memory Type:: -

Controller Series:: -

RAM Size:: -

Interface:: -

Number of I/O:: -

Voltage - Supply:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: M2.2 Chip Card Module

SLE 4418 M2.2 FAQ

1.How can I place an order for SLE 4418 M2.2 through Aetrix?

Please submit a Request for Quotation (RFQ) for SLE 4418 M2.2 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SLE 4418 M2.2 reliable?

The price and inventory of SLE 4418 M2.2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SLE 4418 M2.2 is usually 5 days.

3.What payment methods are accepted for SLE 4418 M2.2?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SLE 4418 M2.2 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SLE 4418 M2.2?

SLE 4418 M2.2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SLE 4418 M2.2 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SLE 4418 M2.2?

For technical support, including SLE 4418 M2.2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SLE 4418 M2.2 requirements.

6.How does Aetrix verify that SLE 4418 M2.2 is sourced from the original manufacturer or authorized distributors?

All SLE 4418 M2.2 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SLE 4418 M2.2 meets industry standards.

7.What is the process for return or replacement of SLE 4418 M2.2?

All SLE 4418 M2.2 units undergo pre-shipment inspection (PSI). If there is an issue with SLE 4418 M2.2, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SLE 4418 M2.2 part is unused and in its original packaging.

Return procedure for SLE 4418 M2.2:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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