參數(shù)資料
型號(hào)： CAT28LV64JA-25T
元件分類： PROM
英文描述： 8K X 8 EEPROM 3V, 250 ns, PDSO28
封裝： SOIC-28
文件頁(yè)數(shù)： 12/12頁(yè)
文件大?。?/td> 527K
代理商： CAT28LV64JA-25T
CAT28LV64
9
Doc. No. 1010, Rev. D
HARDWARE DATA PROTECTION
The following is a list of hardware data protection features
that are incorporated into the CAT28LV64.
(1) VCC sense provides for write protection when VCC
falls below 2.0V min.
(2) A power on delay mechanism, tINIT (see AC
characteristics), provides a 5 to 10 ms delay before
a write sequence, after VCC has reached 2.40V min.
(3) Write inhibit is activated by holding any one of OE
low, CE high or WE high.
(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 CAT28LV64 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 CAT28LV64 is
in the standard operating mode).
Figure 9. Write Sequence for Activating Software
Data Protection
Figure 10. Write Sequence for Deactivating
Software Data Protection
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.
28LV64 F12
SOFTWARE DATA
PROTECTION ACTIVATED
(1)
WRITE DATA:
XX
WRITE LAST BYTE
TO
LAST ADDRESS
TO ANY ADDRESS
AA
ADDRESS:
1555
WRITE DATA:
55
ADDRESS:
0AAA
WRITE DATA:
A0
ADDRESS:
1555
WRITE DATA:
AA
ADDRESS:
1555
WRITE DATA:
55
ADDRESS:
0AAA
WRITE DATA:
80
ADDRESS:
1555
WRITE DATA:
AA
ADDRESS:
1555
WRITE DATA:
55
ADDRESS:
0AAA
WRITE DATA:
20
ADDRESS:
1555
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
CAT28LV64JI-20 功能描述:電可擦除可編程只讀存儲(chǔ)器 (8kx8) 64K 3V RoHS:否 制造商:Atmel 存儲(chǔ)容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時(shí)鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8
CAT28LV64JI-25 功能描述:電可擦除可編程只讀存儲(chǔ)器 (8kx8) 64K 3V RoHS:否 制造商:Atmel 存儲(chǔ)容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時(shí)鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8
CAT28LV64L-20 功能描述:電可擦除可編程只讀存儲(chǔ)器 (8kx8) 64K 3V 200ns RoHS:否 制造商:Atmel 存儲(chǔ)容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時(shí)鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8
CAT28LV64L-25 功能描述:電可擦除可編程只讀存儲(chǔ)器 (8kx8) 64k 3V 250ns RoHS:否 制造商:Atmel 存儲(chǔ)容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時(shí)鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8
CAT28LV64LI20 功能描述:電可擦除可編程只讀存儲(chǔ)器 64K-Bit CMOS PARA 電可擦除可編程只讀存儲(chǔ)器 RoHS:否 制造商:Atmel 存儲(chǔ)容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時(shí)鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8
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