Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Infineon Technologies SLE 4432 C

Name: SLE 4432 C
Brand: Infineon Technologies
SKU: SLE 4432 C
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SLE 4432 C

Manufacturer:: Infineon Technologies

Category:: Application Specific Microcontrollers

Package:: -

Datasheet:: SLE 4432 C.pdf

Description:: IC EEPROM 256BYTE CHIP

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,970

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

SLE 4432 C from Siemens AG is an intelligent 256-byte EEPROM IC for chip card applications, implementing ISO/IEC 7816-3 synchronous two-wire serial interface with dedicated VCC, RST, CLK, GND, and I/O contacts. It provides byte-wise addressing, irreversible write protection for the lowest 32 memory addresses (0–31), and guarantees ≥10⁴ write/erase cycles with ≥10-year data retention at +25°C.

For engineers reviewing the SLE 4432 C datasheet, SLE 4432 C pinout, SLE 4432 C application in smart cards or secure ID systems, or SLE 4432 C equivalent for legacy chip card design continuity, this page delivers verified electrical, timing, memory mapping, and contact-level interface specifications aligned with Siemens' 07.95 datasheet.

Technical Context

The SLE 4432 C operates as a contact-based synchronous serial EEPROM, requiring external clock (CLK) and reset (RST) signals per ISO 7816-3. Its memory is organized as 256 × 8-bit main memory plus 32 × 1-bit protection memory, with no security code verification logic-distinguishing it from the SLE 4442 C.

Communication uses a two-wire link protocol with open-drain I/O line and answer-to-reset (ATR) response compliant with ISO 7816-3. Programming time is fixed at 2.5 ms per byte for both erase and write operations, and all protection bits are set irreversibly via dedicated Write Protection Memory commands.

Key Specifications

Parameter	Value and Actual Design Meaning
Main memory size	256 bytes (256 × 8-bit), directly addressable by byte for read/write operations
Protection memory	32 × 1-bit, permanently sets write-protection on addresses 0–31 after programming
Write/erase endurance	≥10,000 cycles, validated under specified DC and AC operating conditions
Data retention	≥10 years at +25°C, based on EEPROM charge retention characterization
Programming time	2.5 ms per byte for both erase and write, fixed duration independent of voltage or temperature within spec
Interface standard	ISO/IEC 7816-3 synchronous two-wire protocol with dedicated CLK, RST, and open-drain I/O

Pinout & Package

SLE 4432 C is supplied as a bare die (chip form) for customer packaging into smart card modules or embedded substrates. It maps to the M2.2 contact layout defined for ISO 7816-compliant cards.

Pin/Terminal	Circuit Role	Design Meaning
C1 (VCC)	Supply voltage input	Accepts 5 V ±10 %; powers internal logic and EEPROM array during active operation
C2 (RST)	Reset control input	Active-low asynchronous reset; initiates Answer-to-Reset (ATR) sequence per ISO 7816-3
C3 (CLK)	Clock input	Synchronous timing reference for command decoding, memory access, and data transfer
C4	No connect	Unbonded terminal; must remain floating in final assembly
C5 (GND)	Ground reference	Primary return path for VCC and I/O; required for noise margin and level referencing
C6	No connect	Unbonded terminal; must remain floating in final assembly
C7 (I/O)	Bidirectional data line	Open-drain serial interface for command, address, and data exchange; requires external pull-up
C8	No connect	Unbonded terminal; must remain floating in final assembly

Key Features

Feature	Design Value
Irreversible write protection	32 protection bits permanently disable writes to main memory addresses 0–31 after programming
ISO 7816-3 compliance	Full synchronization, ATR format, and contact assignment (C1–C8) match ISO/IEC 7816-2 and -3
Byte-wise memory addressing	Direct 8-bit address selection enables single-byte reads/writes without block overhead
Fixed 2.5 ms programming	Deterministic erase/write latency simplifies host controller timing and timeout handling

Applications

Telecom SIM Cards

Government ID Cards

Use Scenario: Storing IMSI, Ki key, and network authentication parameters in GSM subscriber identity modules.

IC Role / Device Role / Timing Role: Secure nonvolatile storage with irreversible protection of critical keys and identifiers.

Use Value: Prevents unauthorized overwriting of cryptographic keys while enabling field-updatable operator data in remaining memory space.

Use Scenario: Embedding biometric templates and personal identification data in national e-passports or driver's licenses.

IC Role / Device Role / Timing Role: Tamper-resistant EEPROM for citizen identity records with permanent write-lock on header fields.

Use Value: Ensures integrity of immutable identity metadata (e.g., document number, issue date) while allowing update of revocable data like visa stamps.

Banking Payment Cards

Access Control Tokens

Use Scenario: Holding EMV application data including static card verification values (SCVVs) and issuer public keys.

IC Role / Device Role / Timing Role: ISO 7816-compliant memory for payment application files with protected key storage zones.

Use Value: Meets EMVCo requirements for write-protection of cryptographic material used in transaction authorization.

Use Scenario: Storing facility access credentials and session counters in physical security tokens issued to employees.

IC Role / Device Role / Timing Role: Low-pin-count, contact-based EEPROM for credential persistence in constrained token form factors.

Use Value: Enables cost-effective, ISO-standard-compliant tokens with guaranteed immutability of master access rules.

Equivalent & Alternatives

The following parts are listed as comparable options for similar intelligent EEPROM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AT88SC0104CA-SH	1 Kbit EEPROM, supports crypto coprocessor interface; no built-in write protection bits	Requires external MCU to manage protection logic; lacks native irreversible lock bits	Choose when cryptographic acceleration is needed and protection is software-managed
FM24CL04B	4-Kbit F-RAM, unlimited endurance, no write delay; no ISO 7816 contact mapping or ATR support	Not compatible with ISO 7816 readers; requires custom interface firmware and mechanical adaptation	Choose only for non-standard card readers where speed and endurance outweigh ISO compliance

Compared with AT88SC0104CA-SH and FM24CL04B, the SLE 4432 C uniquely delivers native ISO 7816-3 contact compatibility, deterministic 2.5 ms write timing, and hardware-enforced irreversible protection-making it irreplaceable in legacy smart card infrastructure requiring drop-in compliance and guaranteed memory integrity.

Availability

SLE 4432 C is available at Aetrix Electronics and suitable for telecom SIM cards, government ID cards, and banking payment cards requiring stable component supply and long-term lifecycle support.

Supply support for SLE 4432 C 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 industrial, automotive, and secure identification ICs before its semiconductor division became Infineon in 1999.

The SLE 4432 C belongs to Siemens' Chip Card IC product line, designed specifically for ISO 7816-compliant contact smart cards requiring tamper-resistant, field-programmable nonvolatile memory with hardware-enforced write protection.

FAQ

Is the SLE 4432 C pin-compatible with the SLE 4442 C?

Yes, both share identical M2.2 contact layout (C1–C8) and electrical pin functions. However, the SLE 4442 C adds 3-byte programmable security code verification and security memory read/update commands not present in the SLE 4432 C, making firmware incompatible despite mechanical equivalence.

Does the SLE 4432 C require a license for use in smart cards?

Yes-the SLE 4432 C's use in smart card applications requires a separate license from Innovatron (137 Boulevard de Sébastopol, Paris), which holds foundational patents covering chip card protocols and memory architectures implemented in this device.

What is the maximum clock frequency supported by the SLE 4432 C?

The SLE 4432 C supports a maximum CLK frequency of 5 MHz, as specified in Section 3.2.4 (AC Characteristics) of the 07.95 datasheet. Operation above this frequency risks command misinterpretation and memory corruption due to violated setup/hold timing.

Can the write protection bits be cleared after programming?

No-protection memory bits are programmed irreversibly. Once a bit in the 32-bit protection register is set to '1', it cannot be reset to '0'. This one-time programmability ensures permanent write-lock on memory addresses 0–31, as confirmed in Section 2.3.4 of the datasheet.

SLE 4432 C Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Discontinued at Digi-Key

Programmable:: Not Verified

Applications:: -

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:: -

SLE 4432 C FAQ

1.How can I place an order for SLE 4432 C through Aetrix?

Please submit a Request for Quotation (RFQ) for SLE 4432 C 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 4432 C reliable?

The price and inventory of SLE 4432 C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SLE 4432 C is usually 5 days.

3.What payment methods are accepted for SLE 4432 C?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SLE 4432 C transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SLE 4432 C?

SLE 4432 C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SLE 4432 C 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 4432 C?

For technical support, including SLE 4432 C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SLE 4432 C requirements.

6.How does Aetrix verify that SLE 4432 C is sourced from the original manufacturer or authorized distributors?

All SLE 4432 C 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 4432 C meets industry standards.

7.What is the process for return or replacement of SLE 4432 C?

All SLE 4432 C units undergo pre-shipment inspection (PSI). If there is an issue with SLE 4432 C, 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 4432 C part is unused and in its original packaging.

Return procedure for SLE 4432 C:

1.Submit a request within 90 days.

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

Tech Hub

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…

2026-07-17 Raspberry Pi Alternatives: Chip-Level Comparison, Compatibility and Replacement Guide

Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…

2026-07-13 How to Test Dynamic Load Response in Low-Voltage High-Current Buck Converters

Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…

2026-07-08 Output Capacitor Selection for High-Current ASIC Vcore Rails

Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…

2026-07-07 High-Current ASIC Core Power Supply Design: 12-Phase Buck, PMBus and Dynamic Load Response

Engineering guide to high-current ASIC Vcore rails, covering 12-phase buck architecture, PMBus control, dynamic load testing, output capacitor networks, smart power stage selection, thermal design and …

2026-07-06 Voltage Regulator: Types, Circuits, Testing and Selection Guide

Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.

2026-06-30 Amplifiers Explained: Types, Circuits, Gain, Classes and Applications

Amplifier guide covering voltage, current and power amplification, gain, feedback, amplifier classes, audio and RF applications, op-amp circuits, transimpedance amplifiers, datasheet selection and trou…