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参数资料
| 型号： | CAT28LV256NI-20 |
| 厂商： | ON SEMICONDUCTOR |
| 元件分类： | PROM |
| 英文描述： | 32K X 8 EEPROM 3V, 200 ns, PQCC32 |
| 封装： | PLASTIC, LCC-32 |
| 文件页数： | 12/12页 |
| 文件大小： | 284K |
| 代理商： | CAT28LV256NI-20 |
CAT28LV256
9
Doc. No. MD-1071, Rev. D
2008 SCILLC. All rights reserved.
Characteristics subject to change without notice
WRITE DATA:
AA
ADDRESS:
5555
WRITE DATA:
55
ADDRESS:
2AAA
WRITE DATA:
80
ADDRESS:
5555
WRITE DATA:
AA
ADDRESS:
5555
WRITE DATA:
55
ADDRESS:
2AAA
WRITE DATA:
20
ADDRESS:
5555
SOFTWARE DATA
PROTECTION ACTIVATED
(1)
WRITE DATA:
XX
WRITE LAST BYTE
TO
LAST ADDRESS
TO ANY ADDRESS
WRITE DATA:
AA
ADDRESS:
5555
WRITE DATA:
55
ADDRESS:
2AAA
WRITE DATA:
A0
ADDRESS:
5555
(4) Noise pulses of less than 20 ns on the WE or CE
inputs will not result in a write cycle.
SOFTWARE DATA PROTECTION
The CAT28LV256 features a software controlled data
protection scheme which, once enabled, requires a data
algorithm to be issued to the device before a write can be
performed. The device is shipped from Catalyst with the
software protection NOT ENABLED (the CAT28LV256
is in the standard operating mode).
Figure 9. Write Sequence for Activating Software
Data Protection
Figure 10. Write Sequence for Deactivating
Software Data Protection
28LV256 F12
28LV256 F13
Note:
(1)
Write protection is activated at this point whether or not any more writes are completed. Writing to addresses must occur within tBLC
Max., after SDP activation.
HARDWARE DATA PROTECTION
The following hardware data protection features are
incorporated into the CAT28LV256.
(1) VCC sense provides write protection when VCC falls
below 2.0V min.
(2) A power on delay mechanism, tINIT (see AC charac-
teristics), provides a 5 to 10 ms delay before a write
sequence, after VCC has reached 2.4V min.
(3) Write inhibit is activated by holding any one of OE
low, CE high, or WE high.
相关PDF资料 |
PDF描述 |
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| CAT29F150N-15T | 18 Output, 3.3V SDRAM Buffer for Desktop PCs with 4 DIMMs |
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| CAT29F150N-20T | x8 Flash EEPROM |
相关代理商/技术参数 |
参数描述 |
|---|---|
| CAT28LV256NI25 | 制造商:Catalyst Semiconductor 功能描述: |
| CAT28LV256NI-25 | 功能描述:电可擦除可编程只读存储器 (32kx8) 256K 3V RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 |
| CAT28LV256NI-30 | 功能描述:电可擦除可编程只读存储器 (32kx8) 256K 3V RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 |
| CAT28LV256P-25 | 功能描述:电可擦除可编程只读存储器 (32kx8) 256K 3V RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 |
| CAT28LV256P-30 | 功能描述:电可擦除可编程只读存储器 (32kx8) 256K 3V RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 |
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