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7C256-25 PDF预览

7C256-25

更新时间: 2022-11-26 04:28:39
品牌 Logo 应用领域
ALSC 静态存储器
页数 文件大小 规格书
8页 128K
描述
High Performance 32Kx8 CMOS SRAM

7C256-25 数据手册

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High Performance  
32K×8  
AS7C256  
AS7C256L  
CMOS SRAM  
32K×8 CMOS SRAM (Common I/O)  
FEATURES  
Organization: 32,768 words × 8 bits  
• Equal access and cycle times  
• Easy memory expansion with CE and OE inputs  
• TTL-compatible, three-state I/O  
High speed  
– 10/12/15/20/25/35 ns address access time  
– 3/3/4/5/6/8 ns output enable access time  
• 28-pin JEDEC standard packages  
Low power consumption  
– 300 mil PDIP and SOJ  
Socket compatible with 7C512 and 7C1024  
– Active:  
660 mW max (10 ns cycle)  
– 330 mil SOIC  
– Standby:  
11 mW max, CMOS I/O  
2.75 mW max, CMOS I/O, L version  
– 8×13.4 TSOP  
– Very low DC component in active power  
2.0V data retention (L version)  
• ESD protection > 2000 volts  
• Latch-up current > 200 mA  
LOGIC BLOCK DIAGRAM  
PIN ARRANGEMENT  
DIP, SOJ, SOIC  
A14  
A12  
A7  
A6  
A5  
A4  
A3  
A2  
A1  
1
2
3
4
5
6
7
8
28  
27  
26  
25  
24  
23  
22  
21  
20  
19  
18  
Vcc  
WE  
A13  
A8  
A9  
A11  
OE  
Vcc  
GND  
INPUT BUFFER  
A10  
CE  
9
A0  
A1  
A2  
A3  
A4  
A5  
I/O7  
I/O0  
A0  
10  
11  
12  
13  
14  
I/O7  
I/O6  
I/O5  
I/O4  
I/O3  
I/O0  
I/O1  
I/O2  
GND  
256×128×8  
ARRAY  
17  
16  
15  
(262,144)  
A6  
A14  
OE  
A11  
A9  
22  
23  
24  
25  
26  
27  
28  
1
2
3
4
5
A10  
CE  
21  
TSOP 8×13.4  
20  
19  
18  
17  
16  
15  
14  
13  
12  
WE  
OE  
CE  
I/O7  
I/O6  
I/O5  
I/O4  
I/O3  
COLUMN DECODER  
CONTROL  
CIRCUIT  
A8  
A13  
WE  
Vcc  
A
7
A
8
A
9
A A A A  
10 11 12 13  
AS7C256  
A14  
A12  
A7  
A6  
A5  
GND  
I/O2  
I/O1  
I/O0  
A0  
11  
10  
9
AS7C256-01  
AS7C256-02  
6
7
A4  
A3  
A1  
A2  
8
SELECTION GUIDE  
7C256-10 7C256-12 7C256-15 7C256-20 7C256-25 7C256-35 Unit  
Maximum Address Access Time  
Maximum Output Enable Access Time  
Maximum Operating Current  
10  
3
12  
3
15  
4
20  
5
25  
6
35  
8
ns  
ns  
120  
2.0  
0.5  
115  
2.0  
0.5  
110  
2.0  
0.5  
100  
2.0  
0.5  
90  
2.0  
0.5  
80  
2.0  
0.5  
mA  
mA  
mA  
Maximum CMOS Standby Current  
L
ALLIANCE SEMICONDUCTOR  

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