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參數(shù)資料
| 型號(hào)： | IS23SC4428 |
| 廠商： | Integrated Silicon Solution, Inc. |
| 元件分類： | DRAM |
| 英文描述： | 1024 x 8 Bits of EEPROM With Programmable Write Protection For Each Byte And Two Bytes of Programmable Security Code(1024 x 8位，每個(gè)字節(jié)帶可編程寫保護(hù)，2字節(jié)可編程安全密碼的EEPROM) |
| 中文描述： | 1024 × 8位的EEPROM，具有可編程寫保護(hù)對(duì)于每一個(gè)字節(jié)，兩個(gè)字節(jié)可編程保障法（1024 × 8位，每個(gè)字節(jié)帶可編程寫保護(hù)，2字節(jié)可編程安全密碼的EEPROM中） |
| 文件頁(yè)數(shù)： | 1/12頁(yè) |
| 文件大小： | 78K |
| 代理商： | IS23SC4428 |
IS23SC4418
IS23SC4428
1-KBYTE EEPROM
WITH WRITE PROTECT FUNCTION AND
PROGRAMMABLE SECURITY CODE (PSC)
Integrated Silicon Solution, Inc. — 1-800-379-4774
ADVANCE INFORMATION
NV001-0C
02/05/99
1
ISSI
This document contains ADVANCE INFORMATION data. 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.
ADVANCE INFORMATION
FEBRUARY 1999
FEATURES
Standard CMOS process
1024 x 8 bits EEPROM organization
Byte-wise addressing
Byte-wise erase/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.
High ESD protection: > 4 KV
High reliability:
– 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
Additional feature of IS23SC4428:
2-byte Programmable Security Code (PSC) for
memory write/erase protection
DESCRIPTION
IS23SC4418
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 corresponding
bytes can never be changed again. A write-protect bit with
data-compare function is available for user to verify the data
in the memory before enabling the protect bit.
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.
The PSC bytes are pre-programmed by the manufacturer
with a code, which is specified for the customer for device
transport security purposes, before the devices are shipped
to the customer. The Error Counter will be pre-erased by the
manufacturer to allow maximum attempts (maximum of
eight) for PSC entry.
ISSI
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| IS23SC4428-X2 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:EEPROM |
| IS23SC4428-X2I | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:EEPROM |
| IS23SC4428-X3 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:EEPROM |
| IS23SC4428-X3I | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:EEPROM |
| IS23SC4428-X4 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:EEPROM |
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