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STK12C68-M PDF预览

STK12C68-M

更新时间: 2024-10-27 23:11:03
品牌 Logo 应用领域
其他 - ETC 存储静态存储器
页数 文件大小 规格书
10页 74K
描述
CMOS NV SRAM 8K X 8 AUTOSTORE NONVOLATILE STATIC RAM

STK12C68-M 数据手册

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STK12C68-M  
CMOS nvSRAM  
8K x 8 AutoStore™  
Nonvolatile Static RAM  
MIL-STD-883 / SMD # 5962-94599  
DESCRIPTION  
FEATURES  
The Simtek STK12C68-M is a fast static RAM (40, 45  
and 55ns), with a nonvolatile EEPROM element incor-  
porated in each static memory cell. The SRAM can be  
• 40, 45 and 55ns Access Times  
• 15 mA I at 200ns Access Speed  
CC  
• Automatic STORE to EEPROM on Power Down  
• Hardware or Software initiated STORE to  
EEPROM  
read and written an unlimited number of times, while  
independent nonvolatile data resides in EEPROM.  
Data transfers from the SRAM to the EEPROM (the  
STOREoperation)takeplaceautomaticallyuponpower  
down using charge stored in an external 100 µF  
capacitor. Transfers from the EEPROM to the SRAM  
(the RECALL operation) take place automatically on  
power up. Software sequences may also be used to  
• Automatic STORE Timing  
• 100,000 STORE cycles to EEPROM  
• 10 year data retention in EEPROM  
• Automatic RECALL on Power Up  
• Software initiated RECALL from EEPROM  
• Unlimited RECALL cycles from EEPROM  
• Single 5V±10% Operation  
initiate both STORE and RECALL operations.  
STORE can also be initiated via a single pin.  
A
The STK12C68-M is available in the following pack-  
ages: a 28-pin 300 mil ceramic DIP and 28-pad LCC.  
• Available in multiple standard packages  
LOGIC BLOCK DIAGRAM  
PIN CONFIGURATIONS  
1
V
28  
V
CCX  
CAP  
EEPROM ARRAY  
256 x 256  
2
3
27  
26  
W
A
A
A
A
A
A
12  
HSB  
7
3
2
28 27  
26  
A3  
25  
24  
1
4
5
A
A
A
G
8
9
6
4
5
A
A
HSB  
6
5
4
STORE  
5
25  
24  
23  
22  
21  
A
A
A
8
9
A4  
23  
22  
6
7
6
4
11  
A
A
A
A
A5  
7
RECALL  
STATIC RAM  
3
3
2
1
0
11  
8
9
21  
20  
8
A
A
A
E
G
A
E
10  
TOP VIEW  
2
1
0
0
A6  
ARRAY  
9
10  
A7  
10  
11  
19  
18  
10  
A
DQ  
DQ  
DQ  
DQ  
DQ  
7
6
20  
19  
18  
A
DQ  
DQ  
A 0  
A12  
256 x 256  
11  
12  
DQ  
DQ  
DQ  
0
1
7
6
A8  
A9  
17  
16  
15  
12  
13  
14  
DQ  
DQ  
V
5
4
1
2
13 14 15 16 17  
HSB  
STORE/  
RECALL  
CONTROL  
3
SS  
A
12  
28 - 300 C-DIP  
28 - LCC  
DQ0  
COLUMN I/O  
DQ1  
DQ2  
DQ3  
PIN NAMES  
A
- A  
12  
Address Inputs  
0
COLUMN DECODER  
W
Write Enable  
Data In/Out  
DQ - DQ  
0
7
DQ4  
DQ5  
E
Chip Enable  
Output Enable  
Power (+5V)  
Ground  
A0  
A1  
A2  
A
A11  
10  
G
E
G
DQ6  
DQ7  
V
CCX  
V
SS  
V
Capacitor  
CAP  
W
Hardware Store/Busy  
HSB  
4-53  

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