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WS57C45-45KMB

更新时间： 2024-09-08 22:40:03
品牌 Logo 应用领域
意法半导体 - STMICROELECTRONICS 内存集成电路可编程只读存储器OTP只读存储器
页数 文件大小 规格书
9页 80K
描述
HIGH-SPEED 2K x 8 REGISTERED CMOS PROM/RPROM

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中文翻译

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WS57C45-45KMB 数据手册

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WS57C45  
HIGH-SPEED 2K x 8 REGISTERED CMOS PROM/RPROM  
KEY FEATURES  
• Ultra-Fast Access Time  
— 25 ns Setup  
— 12 ns Clock to Output  
• DESC SMD Nos. 5962-88735/5962-87529  
• Pin Compatible with AM27S45 and  
CY7C245  
• Low Power Consumption  
• Fast Programming  
• Immune to Latch-UP  
— Up to 200 mA  
• Programmable Synchronous or  
Asynchronous Output Enable  
• ESD Protection Exceeds 2000 V  
• Programmable Asynchronous Initialize  
Register  
GENERAL DESCRIPTION  
The WS57C45 is an extremely High Performance 16K UV Erasable Registered CMOS RPROM. It is a direct  
drop-in replacement for such devices as the AM27S45 and CY7C245.  
To meet the requirements of systems which execute and fetch instructions simultaneously, an 8-bit parallel data  
register has been provided at the output which allows RPROM data to be stored while other data is being  
addressed.  
An asynchronous initialization feature has been provided which enables a user programmable 2049th word to be  
placed on the outputs independent of the system clock. This feature can be used to force an initialize word or  
provide a preset or clear function.  
A further advantage of the WS57C45 over Bipolar PROM devices is the fact that it utilizes a proven EPROM  
technology. This enables the entire memory array to be tested for switching characteristics and functionality after  
assembly. Unlike devices which cannot be erased, every WS57C45 RPROM in a windowed package is 100%  
tested with worst case test patterns both before and after assembly.  
PIN CONFIGURATION  
TOP VIEW  
Chip Carrier  
CERDIP/Plastic DIP/  
Flatpack  
NC  
A
A
A
V
A
A
9
5
6
7
CC  
8
A
A
A
A
A
A
A
A
O
O
O
1
V
A
A
A
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
14  
13  
7
6
5
4
3
2
1
0
0
1
2
CC  
8
2
4
3
2
26  
25  
28 27  
1
3
A
A
A
A
A
5
6
7
8
9
9
A
4
3
2
1
0
10  
INIT/V  
4
10  
24  
23  
22  
21  
20  
19  
PP  
OE/OE  
5
INIT/V  
PP  
OE/OE  
S
6
S
CP/PGM  
NC  
7
CP/PGM  
8
O
O
O
O
O
NC  
7
6
5
4
3
10  
11  
12 13 14  
O
7
9
O
0
O
6
10  
11  
12  
16  
18  
15  
17  
O
GND  
O
O
NC O  
O
4 5  
1
2
3
GND  
PRODUCT SELECTION GUIDE  
PARAMETER  
WS57C45-25  
WS57C45-35  
WS57C45-45  
Set Up Time (Max)  
25 ns  
12 ns  
35 ns  
15 ns  
45 ns  
25 ns  
Clock to Output (Max)  
2-21  
Return to Main Menu  
1234567...9

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