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DS1746_12

更新时间： 2024-11-19 07:16:55
品牌 Logo 应用领域
美信 - MAXIM 时钟
页数 文件大小 规格书
16页 452K
描述
Y2K-Compliant, Nonvolatile Timekeeping RAMs

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中文翻译

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DS1746_12 数据手册

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19-5503; Rev 3/12  
DS1746/DS1746P  
Y2K-Compliant, Nonvolatile Timekeeping RAMs  
FEATURES  
PIN CONFIGURATIONS  
. Integrated NV SRAM, Real-Time Clock,  
Crystal, Power-Fail Control Circuit, and  
Lithium Energy Source  
TOP VIEW  
N.C.  
A16  
A14  
A12  
A7  
VCC  
A15  
N.C.  
WE  
A13  
A8  
A9  
A11  
OE  
1
32  
31  
Maxim  
DS1746  
2
3
4
. Clock Registers are Accessed Identically to  
the Static RAM. These Registers are Resident  
in the Eight Top RAM Locations.  
. Century Byte Register (i.e., Y2K Compliant)  
. Totally Nonvolatile with Over 10 Years of  
Operation in the Absence of Power  
. BCD-Coded Century, Year, Month, Date,  
Day, Hours, Minutes, and Seconds with  
Automatic Leap Year Compensation Valid  
Up to the Year 2100  
. Battery Voltage-Level Indicator Flag  
. Power-Fail Write Protection Allows for ±10%  
VCC Power Supply Tolerance  
. Lithium Energy Source is Electrically  
Disconnected to Retain Freshness Until  
Power is Applied for the First Time  
. DIP Module Only  
30  
29  
5
6
28  
27  
A6  
A5  
7
8
26  
25  
A4  
A3  
A2  
A1  
9
10  
24  
23  
A10  
CE  
11  
12  
22  
21  
DQ7  
A0  
13  
14  
15  
16  
20  
DQ6  
DQ5  
DQ4  
DQ3  
DQ0  
DQ1  
DQ2  
19  
18  
17  
GND  
Encapsulated DIP  
N.C.  
A15  
A16  
N.C.  
N.C.  
A14  
34  
33  
32  
31  
30  
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
Maxim  
DS1746P  
Standard JEDEC Byte-Wide 128k x 8 Static  
RAM Pinout  
. PowerCap Module Board Only  
Surface Mountable Package for Direct  
Connection to PowerCap Containing  
Battery and Crystal  
RST  
A13  
A12  
A11  
A10  
A9  
VCC  
29  
28  
27  
26  
25  
24  
23  
22  
21  
20  
19  
WE  
OE  
CE  
DQ7  
DQ6  
DQ5  
DQ4  
DQ3  
A8  
A7  
A6  
A5  
A4  
A3  
A2  
A1  
A0  
Replaceable Battery (PowerCap)  
Power-On Reset Output  
Pin-for-Pin Compatible with Other Densities  
of DS174xP Timekeeping RAM  
DQ2  
DQ1  
DQ0  
GND  
X1 GND  
VBAT  
X2  
18  
. Also Available in Industrial Temperature  
Range: -40°C to +85°C  
PowerCap Module Board  
(Uses DS9034PCX+ or DS9034I-PCX+ PowerCap)  
. Underwriters Laboratories (UL) Recognized  
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.  
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