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STK15C88-N25 PDF预览

STK15C88-N25

更新时间: 2024-11-08 22:53:23
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
9页 78K
描述
32K x 8 AutoStore nvSRAM High Performance CMOS Nonvolatile Static RAM

STK15C88-N25 数据手册

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STK15C88  
32K x 8 AutoStore™ nvSRAM  
High Performance CMOS  
Nonvolatile Static RAM  
FEATURES  
DESCRIPTION  
• Nonvolatile Storage Without Battery Problems  
• Directly Replaces 32K x 8 static RAM, Battery  
Backed RAM or EEPROM  
• 25ns, 35ns and 45ns Access Times  
• Store to EEPROM Initiated by Software or  
AutoStore™ on Power Down  
• Recall to SRAM by Software or Power Restore  
• 15mA ICC at 200ns Cycle Time  
• Unlimited Read, Write and Recall Cycles  
• 1,000,000 Store Cycles to EEPROM  
• 100 Year Data Retention Over Full Industrial  
Temperature Range  
• Commercial and Industrial Temp. Ranges  
• 28 Pin 600 or 300 mil PDIP and 350 mil SOIC  
The Simtek STK15C88 is a fast static RAM with a  
nonvolatile, electrically-erasable PROM element  
incorporated in each static memory cell. The SRAM  
can be read and written an unlimited number of  
times, while independent, nonvolatile data resides in  
EEPROM. Data transfers from the SRAM to the  
EEPROM (the STORE operation) can take place  
automatically on power down using charge stored in  
system capacitance. Transfers from the EEPROM to  
the SRAM (the RECALL operation) take place auto-  
matically on restoration of power. Initiation of  
STORE and RECALL cycles can also be controlled  
by entering control sequences on the SRAM inputs.  
PIN CONFIGURATIONS  
BLOCK DIAGRAM  
A
1
28  
27  
26  
25  
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
V
CC  
14  
A
2
W
12  
A
A
A
A
A
A
A
A
3
A
A
A
A
7
6
13  
8
EEPROM ARRAY  
256 x 1024  
4
5
5
9
VCC  
6
4
11  
A6  
7
G
3
STORE  
A7  
STORE/  
RECALL  
CONTROL  
8
A
E
2
10  
POWER  
A8  
9
1
STATIC RAM  
ARRAY  
CONTROL  
10  
11  
12  
13  
14  
DQ  
DQ  
DQ  
DQ  
DQ  
0
7
6
5
4
3
A9  
RECALL  
DQ  
DQ  
DQ  
0
A11  
A12  
A13  
A14  
1
256 x 1024  
2
V
SS  
SOFTWARE  
DETECT  
28 - 300 PDIP  
28 - 600 PDIP  
28 - 350 SOIC  
28 - 300 SOIC  
A0 A13  
DQ0  
COLUMN I/O  
DQ1  
DQ2  
DQ3  
DQ4  
DQ5  
DQ6  
DQ7  
COLUMN DEC  
PIN NAMES  
A
- A  
Address Inputs  
Write Enable  
Data In/Out  
Chip Enable  
Output Enable  
Power (+5V)  
Ground  
0
14  
A0 A1 A2 A3 A4 A5 A10  
W
G
DQ - DQ  
0
7
E
E
G
W
V
V
CC  
SS  
August 1998  
5-35  

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