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W27E520 PDF预览

W27E520

更新时间: 2024-11-09 22:41:27
品牌 Logo 应用领域
华邦 - WINBOND 可编程只读存储器电动程控只读存储器
页数 文件大小 规格书
16页 232K
描述
64K X 8 ELECTRICALLY ERASABLE EPROM

W27E520 数据手册

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W27E520  
´ 8 ELECTRICALLY ERASABLE EPROM  
64K  
GENERAL DESCRIPTION  
The W27E520 is a high speed, low power Electrically Erasable and Programmable Read Only  
´
Memory organized as 65,536 8 bits. It includes latches for the lower 8 address lines to multiplex  
with the 8 data lines. To cooperate with the MCU, this device could save the external TTL  
component, also cost and space. It requires only one supply in the range of 4.5V to 5.5V in normal  
read mode. The W27E520 provides an electrical chip erase function. It will be a great convenient  
when you need to change/update the contents in the device.  
FEATURES  
· High speed access time: 70/90 nS (max.)  
· Read operating current: 20 mA (max.)  
· Erase/Programming operating current  
· High Reliability CMOS Technology  
-
-
2K V ESD Protection  
200 mA Latchup Immunity  
· Fully static operation  
30 mA (max.)  
m
· Standby current: 100 A (max.)  
· All inputs and outputs directly TTL/CMOS  
compatible  
· Unregulated battery power supply range,  
4.5V to 5.5V  
· Three-state outputs  
· +13V erase and programming voltage  
· Available packages: 20-pin TSSOP and 20-pin  
SOP  
PIN CONFIGURATIONS  
BLOCK DIAGRAM  
ALE  
OE / V  
OUTPUT  
BUFFER  
1
A10  
A12  
A14  
ALE  
20  
19  
18  
17  
16  
15  
14  
13  
12  
11  
A8  
CONTROL  
2
AD1  
AD3  
AD5  
AD7  
GND  
PP  
3
4
L
A
T
5
V
DD  
TSSOP  
Top View  
C
H
E
S
AD7 - AD0  
6
OE/VPP  
A15  
MEMORY  
ARRAY  
DECODER  
7
AD6  
AD4  
AD2  
AD0  
8
A15 - A8  
V
A13  
9
A11  
10  
DD  
A9  
GND  
1
VDD  
ALE  
A14  
A12  
A10  
A8  
OE/VPP  
A15  
20  
19  
18  
17  
2
PIN DESCRIPTION  
3
A13  
SYMBOL  
DESCRIPTION  
4
A11  
A9  
Address/Data Inputs/Outputs  
Address Inputs  
-
AD0 AD7  
5
SOP  
Top View  
16  
15  
14  
13  
12  
11  
6
-
A8 A15  
AD0  
7
AD1  
AD2  
AD4  
ALE  
Address Latch Enable  
Output Enable, Program/Erase  
Supply Voltage  
8
AD3  
AD5  
AD7  
PP  
OE  
/V  
9
AD6  
10  
GND  
DD  
V
Power Supply  
GND  
Ground  
Publication Release Date: September 2000  
Revision A2  
- 1 -  

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