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參數(shù)資料
| 型號(hào)： | CAT28LV256 |
| 英文描述： | 256K-Bit CMOS Parallel EEPROM(低壓,快速，低功耗，256K位（32K x 8位）并行CMOS EEPROM) |
| 中文描述： | 256K位CMOS并行的EEPROM（低壓，快速，低功耗，256K位（32K的× 8位）并行的CMOS EEPROM的） |
| 文件頁數(shù)： | 10/10頁 |
| 文件大?。?/td> | 71K |
| 代理商： | CAT28LV256 |
CAT28LV256
10
Preliminary
Doc. No. 25040-00 2/98
CE
WE
AA
5555
55
2AAA
DATA
ADDRESS
tWC
80
5555
AA
5555
55
2AAA
20
5555
SDP
RESET
DEVICE
UNPROTECTED
CE
WE
tWP
AA
5555
55
2AAA
A0
5555
DATA
ADDRESS
tBLC
tWC
BYTE OR
PAGE
WRITES
ENABLED
To activate the software data protection, the device must
be sent three write commands to specific addresses with
specific data (Figure 9). This sequence of commands
(along with subsequent writes) must adhere to the page
write timing specifications (Figure 11). Once this is done,
all subsequent byte or page writes to the device must be
preceded by this same set of write commands. The data
protection mechanism is activated until a deactivate
sequence is issued, regardless of power on/off transi-
tions. This gives the user added inadvertent write pro-
tection on power-up in addition to the hardware protec-
tion provided.
To allow the user the ability to program the device with
an E
2
PROM programmer (or for testing purposes) there
is a software command sequence for deactivating the
data protection. The six step algorithm (Figure 10) will
reset the internal protection circuitry, and the device will
return to standard operating mode (Figure 12 provides
reset timing). After the sixth byte of this reset sequence
has been issued, standard byte or page writing can
commence.
Figure 11. Software Data Protection Timing
28LV256 F14
Figure 12. Resetting Software Data Protection Timing
28LV256 F15
ORDERING INFORMATION
Notes:
(1)
The device used in the above example is a CAT28LV256HNI-25T (100,000 Cycle Endurance, PLCC, Industrial temperature, 250 ns
Access Time, Tape & Reel).
28LV256 F16
Prefix
Device #
Suffix
28LV256
Product
Number
CAT
Optional
Company
ID
N
I
T
Tape & Reel
T: 500/Reel
Package
P: PDIP
N: PLCC
T13: TSOP (8mmx13.4mm)
-25
Temperature Range
Blank = Commercial (0C to +70C)
I = Industrial (-40C to +85C)
A = Automotive (-40 to +105C)*
Speed
25: 250ns
30: 300ns
35: 350ns
H
Endurance
Blank = 10,000 Cycle
H = 100,000 Cycle
* -40C to +125C is available upon request
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| CAT28LV65L-15T | The CAT24FC02 is a 2-kb Serial CMOS EEPROM internally organized as 256 words of 8 bits each |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CAT28LV256G25 | 功能描述:電可擦除可編程只讀存儲(chǔ)器 (32kx8) 256K 3V 250 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 |
| CAT28LV256G-25 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Catalyst Semiconductor 功能描述: |
| CAT28LV256G-25T | 功能描述:電可擦除可編程只讀存儲(chǔ)器 256K-Bit Parallel 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 |
| CAT28LV256G-30 | 功能描述:電可擦除可編程只讀存儲(chǔ)器 (32kx8) 256K 3V 300 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 |
| CAT28LV256G-30T | 功能描述:電可擦除可編程只讀存儲(chǔ)器 256K-Bit Parallel 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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