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AT34C02Y1-10YI-2.7 PDF预览

AT34C02Y1-10YI-2.7

更新时间： 2024-11-23 23:32:39
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电可擦编程只读存储器
页数 文件大小 规格书
19页 218K
描述
EEPROM

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AT34C02Y1-10YI-2.7 数据手册

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Features  
• Permanent Software Write Protection for the First-half of the Array  
– Software Procedure to Verify Write Protect Status  
• Hardware Write Protection for the Entire Array  
• Low-voltage and Standard-voltage Operation  
– 2.7 (VCC = 2.7V to 5.5V)  
– 1.8 (VCC = 1.8V to 5.5V)  
• Internally Organized 256 x 8  
• 2-wire Serial Interface  
• Schmitt Trigger, Filtered Inputs for Noise Suppression  
• Bidirectional Data Transfer Protocol  
• 100 kHz (1.8V) and 400 kHz (2.7V and 5.0V) Compatibility  
• 16-byte Page Write Modes  
• Partial Page Writes Are Allowed  
• Self-timed Write Cycle (10 ms max)  
• High-reliability  
– Endurance: 1 Million Write Cycles  
– Data Retention: 100 Years  
• Automotive Grade and Extended Temperature Devices Available  
• 8-pin PDIP, 8-lead JEDEC SOIC, 8-lead MAP and 8-lead TSSOP Packages  
2-wire Serial  
EEPROM  
with Permanent  
Software Write  
Protect  
2K (256 x 8)  
Description  
The AT34C02 provides 2048 bits of serial electrically-erasable and programmable  
read only memory (EEPROM) organized as 256 words of 8 bits each. The first-half of  
the device incorporates a software write protection feature while hardware write pro-  
tection for the entire array is available via an external pin as well. Once the software  
write protection is enabled, by sending a special command to the device, it cannot be  
reversed. The hardware write protection is controlled with the WP pin and can be used  
to protect the entire array, whether or not the software write protection has been  
enabled. This allows the user to protect none, first-half, or all of the array depending  
on the application. The device is optimized for use in many industrial and commercial  
applications where low-power and low-voltage operations are essential. The AT34C02  
is available in space saving 8-pin PDIP, 8-lead JEDEC SOIC, 8-lead MAP and 8-lead  
TSSOP packages and is accessed via a 2-wire serial interface. In addition, it is avail-  
able in 2.7V (2.7V to 5.5V) and 1.8V (1.8V to 5.5V) versions.  
AT34C02  
Pin Configurations  
8-lead PDIP  
8-lead MAP  
Pin Name  
A0 - A2  
SDA  
Function  
Address Inputs  
Serial Data  
1
2
3
4
VCC  
WP  
SCL  
SDA  
8
7
6
5
A0  
A1  
A2  
GND  
A0  
A1  
1
2
3
4
8
7
6
5
VCC  
WP  
A2  
SCL  
SDA  
SCL  
Serial Clock Input  
Write Protect  
GND  
WP  
Bottom View  
8-lead TSSOP  
8-lead SOIC  
A0  
A1  
A2  
1
2
3
4
8
7
6
5
VCC  
WP  
A0  
A1  
1
2
3
4
8
7
6
5
VCC  
WP  
SCL  
SDA  
A2  
SCL  
SDA  
GND  
GND  
Rev. 0958J–SEEPR–10/02  
1234567...19

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