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DS1744P-70IND PDF预览

DS1744P-70IND

更新时间： 2024-11-25 23:16:31
品牌 Logo 应用领域
达拉斯 - DALLAS 外围集成电路双倍数据速率时钟
页数 文件大小 规格书
18页 348K
描述
Y2K-Compliant, Nonvolatile Timekeeping RAMs

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DS1744P-70IND 数据手册

 浏览型号DS1744P-70IND的Datasheet PDF文件第2页浏览型号DS1744P-70IND的Datasheet PDF文件第3页浏览型号DS1744P-70IND的Datasheet PDF文件第4页浏览型号DS1744P-70IND的Datasheet PDF文件第5页浏览型号DS1744P-70IND的Datasheet PDF文件第6页浏览型号DS1744P-70IND的Datasheet PDF文件第7页 
DS1744/DS1744P  
Y2K-Compliant, Nonvolatile Timekeeping RAMs  
www.maxim-ic.com  
FEATURES  
PIN CONFIGURATIONS  
CꢀIntegrated NV SRAM, Real-Time Clock,  
Crystal, Power-Fail Control Circuit, and  
Lithium Energy Source  
TOP VIEW  
A14  
A12  
A7  
1
2
3
4
5
6
7
8
9
28  
27  
26  
25  
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
VCC  
WE  
Dallas  
Semiconductor  
CꢀClock Registers are Accessed Identically to  
the Static RAM. These Registers are Resident  
in the Eight Top RAM Locations.  
DS1744  
A13  
A6  
A8  
A5  
A9  
A4  
A11  
OE  
CꢀCentury Byte Register (i.e., Y2K Compliant)  
CꢀTotally Nonvolatile with Over 10 Years of  
Operation in the Absence of Power  
A3  
A2  
A10  
A1  
CE  
A0  
10  
11  
12  
13  
14  
DQ7  
DQ6  
DQ5  
DQ4  
DQ3  
CꢀBCD-Coded Century, Year, Month, Date,  
Day, Hours, Minutes, and Seconds with  
Automatic Leap-Year Compensation Valid  
Up to the Year 2100  
DQ0  
DQ1  
DQ2  
GND  
PDIP Module  
CꢀBattery Voltage-Level Indicator Flag  
CꢀPower-Fail Write Protection Allows for ±10%  
(700-mil Extended)  
VCC Power-Supply Tolerance  
CꢀLithium Energy Source is Electrically  
Disconnected to Retain Freshness Until  
Power is Applied for the First Time  
CꢀDIP Module Only  
34  
N.C.  
N.C.  
A14  
N.C.  
N.C.  
N.C.  
RST  
VCC  
1
33  
32  
31  
30  
29  
28  
27  
26  
25  
24  
23  
22  
21  
20  
19  
18  
2
3
Dallas  
Semiconductor  
DS1744P  
A13  
A12  
A11  
A10  
A9  
4
5
6
7
8
9
Standard JEDEC Byte-Wide 32k x 8 Static  
RAM Pinout  
WE  
OE  
CE  
A8  
ꢀ
DQ7  
CꢀPowerCap Module Board Only  
A7  
A6  
A5  
A4  
A3  
A2  
A1  
A0  
10  
11  
12  
13  
14  
15  
16  
17  
DQ6  
DQ5  
DQ4  
DQ3  
DQ2  
DQ1  
DQ0  
GND  
Surface-Mountable Package for Direct  
Connection to PowerCap Containing  
Battery and Crystal  
GND VBAT  
X2  
X1  
Replaceable Battery (PowerCap)  
Power-On Reset Output  
PowerCap Module Board  
(Uses DS9034PCX PowerCap)  
Pin-for-Pin Compatible with Other Densities  
of DS174xP Timekeeping RAM  
CꢀAlso Available in Industrial Temperature  
Range: -40°C to +85°C  
PowerCap is a registered trademark of Dallas Semiconductor.  
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device  
may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata.  
1 of 18  
REV: 011204  
1234567...18

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