19-5633; Rev 11/10
DS1249W
3.3V 2048kb Nonvolatile SRAM
www.maxim-ic.com
FEATURES
PIN ASSIGNMENT
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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 of 100ns
Lithium energy source is electrically
disconnected to retain freshness until power is
applied for the first time
Optional industrial (IND) temperature range
of -40 ° C to +85 ° C
JEDEC standard 32-pin DIP package
NC
A16
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
DQ1
DQ2
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
V CC
A15
A17
WE
A13
A8
A9
A1 1
OE
A1 0
CE
DQ7
DQ6
DQ5
DQ4
DQ3
32-Pin Encapsulated Package
740mil Extended
PIN DESCRIPTION
A0–A17
DQ0–DQ7
CE
W E
OE
V CC
GND
NC
- Address Inputs
- Data In/Data Out
- Chip Enable
- Write Enable
- Output Enable
- Power (+3.3V)
- Ground
- No Connect
DESCRIPTION
The DS1249W 2048kb nonvolatile (NV) SRAMs are 2,097,152-bit, fully static, NV SRAMs organized as
262,144 words by 8 bits. Each NV SRAM has a self-contained lithium energy source and control circuitry
that constantly monitors V CC 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 that can be executed, and no additional
support circuitry is required for microprocessor interfacing.
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相关PDF资料
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相关代理商/技术参数
DS1249W-150 功能描述:NVRAM 3.3V 2048K NV SRAM RoHS:否 制造商:Maxim Integrated 数据总线宽度:8 bit 存储容量:1024 Kbit 组织:128 K x 8 接口类型:Parallel 访问时间:70 ns 电源电压-最大:5.5 V 电源电压-最小:4.5 V 工作电流:85 mA 最大工作温度:+ 70 C 最小工作温度:0 C 封装 / 箱体:EDIP 封装:Tube
DS1249W-150# 功能描述:NVRAM 3.3V 2048K NV SRAM RoHS:否 制造商:Maxim Integrated 数据总线宽度:8 bit 存储容量:1024 Kbit 组织:128 K x 8 接口类型:Parallel 访问时间:70 ns 电源电压-最大:5.5 V 电源电压-最小:4.5 V 工作电流:85 mA 最大工作温度:+ 70 C 最小工作温度:0 C 封装 / 箱体:EDIP 封装:Tube
DS1249W-150-IND 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:3.3V 2048kb Nonvolatile SRAM
DS1249Y 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:2048k Nonvolatile SRAM
DS1249Y/AB 制造商:未知厂家 制造商全称:未知厂家 功能描述:2048K Nonvolatile SRAM
DS1249Y100 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:2048k Nonvolatile SRAM
DS1249Y-100 功能描述:NVRAM 2048K NV SRAM RoHS:否 制造商:Maxim Integrated 数据总线宽度:8 bit 存储容量:1024 Kbit 组织:128 K x 8 接口类型:Parallel 访问时间:70 ns 电源电压-最大:5.5 V 电源电压-最小:4.5 V 工作电流:85 mA 最大工作温度:+ 70 C 最小工作温度:0 C 封装 / 箱体:EDIP 封装:Tube
DS1249Y-100# 功能描述:NVRAM 2048K NV SRAM RoHS:否 制造商:Maxim Integrated 数据总线宽度:8 bit 存储容量:1024 Kbit 组织:128 K x 8 接口类型:Parallel 访问时间:70 ns 电源电压-最大:5.5 V 电源电压-最小:4.5 V 工作电流:85 mA 最大工作温度:+ 70 C 最小工作温度:0 C 封装 / 箱体:EDIP 封装:Tube