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參數(shù)資料
| 型號： | DS1213D |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 存儲器 |
| 英文描述： | SmartSocket 256K/1M(64K/256K/1M位帶掉電保護SRAM智能插卡) |
| 中文描述： | SPECIALTY MEMORY CIRCUIT, PDIP28 |
| 封裝： | 0.600 INCH, DIP-32 |
| 文件頁數(shù)： | 1/2頁 |
| 文件大?。?/td> | 25K |
| 代理商： | DS1213D |
DS1213D
SmartSocket 256K/1M
DS1213D
031998 1/2
FEATURES
Accepts standard 32K x 8 or 128K x 8 CMOS static
RAMs
Embedded lithium energy cell retains RAM data
Self–contained circuitry safeguards data
Data retention time is greater than 10 years with the
proper RAM selection
IC socket permits upgrading from 32K x 8 to
128K x 8 RAM
Proven gas–tight socket contacts
Operating temperature range 0
°
C to 70
°
C
PIN ASSIGNMENT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
GND 16
32
V
CC
31
30
V
CC
29
28
27
26
25
24
23
22
CE
21
20
19
18
17
32–PIN INTELLIGENT SOCKET
(600 MIL)
PIN DESCRIPTION
CE
– Conditioned Chip Enable
V
CC
– Switched V
CC
GND
– Ground
All pins pass through except 22, 30 and 32.
DESCRIPTION
The DS1213D SmartSocket is a 32–pin, 600 mil DIP
socket with a built–in CMOS controller circuit and an
embedded lithium energy source. It accepts 32K x 8 or
128K x 8 JEDEC bytewide CMOS static RAM. When
the socket is mated with a CMOS RAM, it provides a
complete solution to problems associated with memory
volatility. The SmartSocket monitors incoming V
CC
for
an out–of–tolerance condition. When such a condition
occurs, an internal lithium energy source is automatical-
ly switched on and write protection is unconditionally en-
abled to prevent data corruption.
Using the SmartSocket saves printed circuit board
space since the SRAM/SmartSocket combination occu-
pies no more area than the SRAM alone. The Smart-
Socket uses only Pins 22, 30 and 32 for RAM control. All
other pins are passed straight through.
See the DS1213B SmartSocket data sheet for technical
details.
See Dallas Semiconductor Application Note 4 for modi-
fication instructions to allow use of 512K x 8 RAM with
this part.
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