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IS23SC4428-X7 PDF预览

IS23SC4428-X7

更新时间: 2024-01-07 18:16:09
品牌 Logo 应用领域
美国芯成 - ISSI 可编程只读存储器电动程控只读存储器电可擦编程只读存储器
页数 文件大小 规格书
12页 69K
描述
1-KBYTE EEPROM WITH WRITE PROTECT FUNCTION AND PROGRAMMABLE SECURITY CODE (PSC)

IS23SC4428-X7 数据手册

 浏览型号IS23SC4428-X7的Datasheet PDF文件第2页浏览型号IS23SC4428-X7的Datasheet PDF文件第3页浏览型号IS23SC4428-X7的Datasheet PDF文件第4页浏览型号IS23SC4428-X7的Datasheet PDF文件第5页浏览型号IS23SC4428-X7的Datasheet PDF文件第6页浏览型号IS23SC4428-X7的Datasheet PDF文件第7页 
®
IS23SC4418  
ISSI  
IS23SC4428  
1-KBYTE EEPROM  
WITH WRITE PROTECT FUNCTION AND  
PROGRAMMABLE SECURITY CODE (PSC)  
NOVEMBER 2001  
FEATURES  
DESCRIPTION  
IS23SC4418  
• Standard CMOS process  
• 1024 x 8 bits EEPROM organization  
• Byte-wiseaddressing  
IS23SC4418 contains 1024 x 8 bits of EEPROM with  
programmable write protection for each byte. Random  
read access to any byte in the memory is always possible.  
The memory can also be erased and written byte by byte.  
Erasing old data in the byte location must be performed  
before new data can be written to the location. Each byte  
in the memory has a corresponding protect bit. The  
protect bits are only one-time programmable and cannot  
be erased. After the protect bits are enabled (logic 0), the  
correspondingbytescanneverbechangedagain.Awrite-protect  
bit with data-compare function is available for user to  
verifythedatainthememorybeforeenablingtheprotectbit.  
• Byte-wiseerase/write  
• Irreversible byte-wise write protection  
• Single 5V power supply for read and write/erase  
• Low power operation:  
– 3 mA typical active current  
• 5 ms programming time  
• 3-wire serial interface  
• 20 KHz serial clock rate  
• Contact configuration and serial interface,  
ISO standard 7816 (Synchronous Transmission)  
compatible.  
IS23SC4428  
IS23SC4428 offers all the features in IS23SC4418. In  
addition, it offers two bytes of Programmable Security  
Code (PSC) against unauthorized memory write/erase  
operations. All the memory, except for the PSC can  
always be read, but the memory can be written or erased  
only after PSC verification. If the user fails to enter the  
correct PSC in eight consecutive attempts, the device will  
block any further PSC entry attempts and the memory can  
never be erased or written again.  
• High ESD protection: > 4 KV  
• Highreliability:  
– 1,000,000 erase/write cycles guaranteed  
– 10 years data retention  
• Wide operating temperature range  
– 0 to +70°C Commercial; –40 to +85°C Industrial  
The PSC bytes are pre-programmed by the manufacturer  
with a code, which is specified for the customer for device  
transportsecuritypurposes,beforethedevicesareshipped  
to the customer. The Error Counter will be pre-erased by  
the manufacturer to allow maximum attempts (maximum  
of eight) for PSC entry.  
Additional feature of IS23SC4428:  
• 2-byte Programmable Security Code (PSC) for  
memorywrite/eraseprotection  
ISSI reserves the right to make changes to its products at any time without notice in order to improve design and supply the best possible product. We assume no responsibility for any errors  
which may appear in this publication. © Copyright 1999, Integrated Silicon Solution, Inc.  
Integrated Silicon Solution, Inc. — 1-800-379-4774  
1
REV. A  
11/01/01  

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