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SLE4440 Datenblatt(PDF) 5 Page - Siemens Semiconductor Group |
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SLE4440 Datenblatt(HTML) 5 Page - Siemens Semiconductor Group |
5 / 14 page SLE 4432 SLE 4442 SLE 4440 SLE 4441 Semiconductor Group 5 Data Sheet Extension 09.98 Introduction This document describes changes and extensions of the Data Sheet 07.95 of SLE 4432 / SLE 4442. All information of the Data Sheet 07.95 are also valid for SLE 4440 and SLE 4441 (e.g. operational information) except the data mentioned in this document. In detail the following items are added or changed • Memory size SLE 4440 • Memory size SLE 4441 • Ambient temperature T A –35°C…+80°C • ESD protection min. 1500 V, typical 4000 V • Endurance minimum 100000 write/erase cycles / bit • Package: Module M3 • Coding information Especially the transmission protocol (2-wire) and commands are fully compatible for all chip types. 1. Memory Overview The memory is organized in a Main Memory of • 64 byte for SLE 4440 • 128 byte for SLE 4441 • 256 byte for SLE 4432 and SLE 4442 Each of the first 32 bytes of the Main Memory can be irreversibly protected against data change by writing the corresponding bit in the Protection Memory (32 bit). Dependent on the state of the protection bit the memory is read only (ROM) or may be erased and written again (EEPROM). Change of the manufacturer code is only possible by the chip manufacturer. Change of data of the Main Memory and write a bit of the Protection Memory is only possible after a correct verification of the Programmable Security Code (PSC) for SLE 4440, SLE 4441 and SLE 4442. |
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