參數(shù)資料
型號(hào)： DS1249Y-70
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類(lèi)： Static RAM
英文描述： 256K X 8 NON-VOLATILE SRAM MODULE, 70 ns, DMA32
封裝： 0.740 INCH, DIP-32
文件頁(yè)數(shù)： 1/10頁(yè)
文件大?。?/td> 286K
代理商： DS1249Y-70
1 of 8
083006
FEATURES
§ 10 years minimum data retention in the
absence of external power
§ Data is automatically protected during power
loss
§ Unlimited write cycles
§ Low-power CMOS operation
§ Read and write access times as fast as 70 ns
§ Lithium energy source is electrically
disconnected to retain freshness until power is
applied for the first time
§ Full ± 10% VCC operating range (DS1249Y)
§ Optional ± 5% VCC operating range
(DS1249AB)
§ Optional industrial temperature range of
-40
°C to +85°C, designated IND
§ JEDEC standard 32-pin DIP package
PIN ASSIGNMENT
PIN DESCRIPTION
A0 - A17
- Address Inputs
DQ0 - DQ7
- Data In/Data Out
CE
- Chip Enable
WE
- Write Enable
OE
- Output Enable
VCC
- Power (+5V)
GND
- Ground
NC
- No Connect
DESCRIPTION
The DS1249 2048k Nonvolatile SRAMs are 2,097,152-bit, fully static, nonvolatile SRAMs organized as
262,144 words by 8 bits. Each NV SRAM has a self-contained lithium energy source and control circuitry
which constantly monitors VCC for an out-of-tolerance condition. When such a condition occurs, the
lithium energy source is automatically switched on and write protection is unconditionally enabled to
prevent data corruption. There is no limit on the number of write cycles which can be executed and no
additional support circuitry is required for microprocessor interfacing.
DS1249Y/AB
2048k Nonvolatile SRAM
www.maxim-ic.com
13
1
2
3
4
5
6
7
8
9
10
11
12
14
31
32-Pin ENCAPSULATED PACKAGE
740-mil EXTENDED
A14
A7
A5
A4
A3
A2
A1
A0
DQ1
DQ0
VCC
A15
A17
WE
A13
A8
A9
A11
OE
A10
CE
DQ7
DQ5
DQ6
32
30
29
28
27
26
25
24
23
22
21
19
20
A16
A12
A6
NC
DQ2
GND
15
16
18
17
DQ4
DQ3
相關(guān)PDF資料
PDF描述
DS1249Y-100 256K X 8 NON-VOLATILE SRAM MODULE, 100 ns, DMA32
DS1250W 512K X 8 NON-VOLATILE SRAM MODULE, 150 ns, DMA32
DS1250Y 512K X 8 NON-VOLATILE SRAM MODULE, 70 ns, DMA32
DS1250AB 512K X 8 NON-VOLATILE SRAM MODULE, 70 ns, DMA32
DS1258AB-70 128K X 16 NON-VOLATILE SRAM MODULE, 70 ns, DMA40
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS1249Y-70# 功能描述:NVRAM 2048K NV SRAM RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)總線寬度:8 bit 存儲(chǔ)容量:1024 Kbit 組織:128 K x 8 接口類(lèi)型:Parallel 訪問(wèn)時(shí)間:70 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 工作電流:85 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:EDIP 封裝:Tube
DS1249Y-70IND 功能描述:NVRAM 2048K NV SRAM RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)總線寬度:8 bit 存儲(chǔ)容量:1024 Kbit 組織:128 K x 8 接口類(lèi)型:Parallel 訪問(wèn)時(shí)間:70 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 工作電流:85 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:EDIP 封裝:Tube
DS1249Y-70-IND 制造商:未知廠家 制造商全稱:未知廠家 功能描述:NVRAM (Battery Based)
DS1249Y-70IND# 功能描述:NVRAM 2048K NV SRAM RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)總線寬度:8 bit 存儲(chǔ)容量:1024 Kbit 組織:128 K x 8 接口類(lèi)型:Parallel 訪問(wèn)時(shí)間:70 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 工作電流:85 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:EDIP 封裝:Tube
DS1249Y-85 功能描述:NVRAM 2048K NV SRAM RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)總線寬度:8 bit 存儲(chǔ)容量:1024 Kbit 組織:128 K x 8 接口類(lèi)型:Parallel 訪問(wèn)時(shí)間:70 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 工作電流:85 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:EDIP 封裝:Tube
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