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AT27C256R-15JI PDF预览

AT27C256R-15JI

更新时间: 2024-11-15 23:32:11
品牌 Logo 应用领域
其他 - ETC 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
12页 174K
描述
x8 EPROM

AT27C256R-15JI 数据手册

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Features  
Fast Read Access Time - 45 ns  
Low-Power CMOS Operation  
– 100 µA max. Standby  
– 20 mA max. Active at 5 MHz  
JEDEC Standard Packages  
– 28-Lead 600-mil PDIP  
– 32-Lead PLCC  
– 28-Lead TSOP and SOIC  
5V ± 10% Supply  
High Reliability CMOS Technology  
– 2,000V ESD Protection  
256K (32K x 8)  
OTP EPROM  
– 200 mA Latchup Immunity  
RapidProgramming Algorithm - 100 µs/byte (typical)  
CMOS and TTL Compatible Inputs and Outputs  
Integrated Product Identification Code  
Commercial, Industrial and Automotive Temperature Ranges  
AT27C256R  
Description  
The AT27C256R is a low-power, high-performance 262,144-bit one-time programma-  
ble read only memory (OTP EPROM) organized 32K by 8 bits. It requires only one 5V  
power supply in normal read mode operation. Any byte can be accessed in less than  
45 ns, eliminating the need for speed reducing WAIT states on high-performance  
microprocessor systems.  
Atmel’s scaled CMOS technology provides low-active power consumption, and fast  
programming. Power consumption is typically only 8 mA in Active Mode and less than  
10 µA in Standby.  
(continued)  
PDIP, SOIC Top View  
Pin Configurations  
VPP  
A12  
A7  
1
2
3
4
5
6
7
8
9
28 VCC  
27 A14  
26 A13  
25 A8  
24 A9  
23 A11  
22 OE  
21 A10  
20 CE  
19 O7  
18 O6  
17 O5  
16 O4  
15 O3  
Pin Name  
A0 to A14  
O0 - O7  
CE  
Function  
Addresses  
Outputs  
A6  
A5  
A4  
A3  
Chip Enable  
Output Enable  
No Connect  
A2  
A1  
OE  
A0 10  
O0 11  
O1 12  
O2 13  
GND 14  
256K EPROM  
NC  
PLCC Top View  
TSOP Top View  
Type 1  
A6  
A5  
A4  
A3  
A2  
5
6
7
8
9
29 A8  
28 A9  
27 A11  
26 NC  
25 OE  
24 A10  
23 CE  
22 O7  
21 O6  
OE  
A11  
A9  
22  
23  
24  
25  
26  
27  
28  
1
21  
20  
19  
18  
17  
16  
15  
14  
13  
12  
11  
10  
9
A10  
CE  
O7  
O6  
O5  
O4  
O3  
GND  
O2  
O1  
O0  
A0  
A8  
A1 10  
A0 11  
NC 12  
O0 13  
A13  
A14  
VCC  
VPP  
A12  
A7  
2
3
A6  
4
A5  
5
A4  
6
A1  
Rev. 0014H–07/98  
Note:  
PLCC Package Pins 1 and  
17 are DON’T CONNECT.  
A3  
7
8
A2  

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