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DS1220Y 参数 Datasheet PDF下载

DS1220Y图片预览
型号: DS1220Y
PDF下载: 下载PDF文件 查看货源
内容描述: 16K非易失SRAM [16k Nonvolatile SRAM]
分类和应用: 存储内存集成电路静态存储器光电二极管
文件页数/大小: 8 页 / 147 K
品牌: DALLAS [ DALLAS SEMICONDUCTOR ]
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DS1220Y
16k Nonvolatile SRAM
www.dalsemi.com
FEATURES
10 years minimum data retention in the
absence of external power
Data is automatically protected during power
loss
Directly replaces 2k x 8 volatile static RAM
or EEPROM
Unlimited write cycles
Low-power CMOS
JEDEC standard 24-pin DIP package
Read and write access times as fast as 100 ns
Full ±10% operating range
Optional industrial temperature range of
-40°C to +85°C, designated IND
PIN ASSIGNMENT
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
DQ1
DQ2
GND
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
VCC
A8
A9
WE
OE
A10
CE
DQ7
DQ6
DQ5
DQ4
DQ3
24-Pin ENCAPSULATED PACKAGE
720-mil EXTENDED
PIN DESCRIPTION
A0-A10
DQ0-DQ7
CE
WE
OE
V
CC
GND
- Address Inputs
- Data In/Data Out
- Chip Enable
- Write Enable
- Output Enable
- Power (+5V)
- Ground
DESCRIPTION
The DS1220Y 16k Nonvolatile SRAM is a 16,384-bit, fully static, nonvolatile RAM organized as 2048
words by 8 bits. Each NV SRAM has a self-contained lithium energy source and control circuitry which
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. The NV SRAM can be used in place of existing 2k x 8 SRAMs directly conforming to
the popular bytewide 24-pin DIP standard. The DS1220Y also matches the pinout of the 2716 EPROM or
the 2816 EEPROM, allowing direct substitution while enhancing performance. 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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