SLE 4428 M2.2

Application Specific Microcontrollers Overview

The Infineon SLE 4428 M2.2 is a wire-bonded module version of the intelligent 1-Kbit EEPROM, originally developed by Siemens. It features a 1024 x 8 bit memory organization with byte-wise addressing and a serial three-wire bus interface compliant with ISO standard 7816. The device includes irreversible byte-wise write protection and an additional Programmable Security Code (PSC) verification logic for enhanced security. It operates at a supply voltage of 5 V with a maximum clock frequency of 20 kHz. The module ensures data retention for a minimum of ten years and supports at least 10^4 write/erase cycles.

Application Specific Microcontrollers Feature Summary

• 1024 x 8 bit EEPROM organization with byte-wise addressing
• Irreversible byte-wise write protection capability
• Programmable Security Code (PSC) verification logic requiring correct entry for write access
• Serial three-wire bus interface conforming to ISO 7816 synchronous transmission standards

Application Specific Microcontrollers Applications

• Smart card embedding in plastic cards
• Secure identification systems requiring user authentication
• Data storage applications needing irreversible write protection

Application Specific Microcontrollers Part Context

The SLE 4428 M2.2 is part of the SLE 4418/SLE 4428 family published by Siemens Semiconductor Group in 1994. Infineon Technologies acquired the semiconductor business of Siemens AG. The M2.2 designation specifically refers to the wire-bonded module package format designed for integration into smart cards, distinct from the bare die configuration.

Application Specific Microcontrollers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. As this component was published in 1994 and represents legacy technology, direct replacements should be verified against specific application requirements for memory size, interface compatibility, and security features.