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DS1747P-70 PDF预览

DS1747P-70

更新时间: 2024-11-23 07:16:51
品牌 Logo 应用领域
美信 - MAXIM 外围集成电路双倍数据速率时钟
页数 文件大小 规格书
16页 573K
描述
Y2K-Compliant, Nonvolatile Timekeeping RAMs

DS1747P-70 数据手册

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19-5504; Rev 3/12  
DS1747/DS1747P  
Y2K-Compliant, Nonvolatile Timekeeping RAMs  
FEATURES  
PIN CONFIGURATIONS  
. Integrated NV SRAM, Real-Time Clock  
(RTC), Crystal, Power-Fail Control  
Circuit, and Lithium Energy Source  
TOP VIEW  
A18  
VCC  
A15  
A17  
WE  
A13  
A8  
A9  
A11  
OE  
1
32  
31  
A16  
A14  
A12  
A7  
Maxim  
DS1747  
2
3
4
. Clock Registers are Accessed Identically to  
the Static RAM. These Registers are  
30  
29  
Resident in the Eight Top RAM Locations  
5
6
28  
27  
A6  
A5  
A4  
A3  
. Century Byte Register (Y2K Compliant)  
7
8
26  
25  
. Totally Nonvolatile with Over 10 Years of  
9
10  
24  
23  
Operation in the Absence of Power  
A10  
CE  
A2  
A1  
11  
12  
22  
21  
. BCD-Coded Century, Year, Month, Date,  
Day, Hours, Minutes, and Seconds with  
Automatic Leap Year Compensation Valid  
Up to the Year 2100  
DQ7  
DQ6  
A0  
13  
14  
15  
16  
20  
19  
18  
17  
DQ0  
DQ1  
DQ2  
DQ5  
DQ4  
DQ3  
. Battery Voltage-Level Indicator Flag  
GND  
. Power-Fail Write Protection Allows for  
Encapsulated DIP  
(512k x 8)  
±10% VCC Power-Supply Tolerance  
. Lithium Energy Source is Electrically  
Disconnected to Retain Freshness Until  
Power is Applied for the First Time  
A18  
A17  
A14  
N.C.  
A15  
A16  
RST  
VCC  
34  
33  
32  
31  
30  
29  
28  
27  
26  
25  
24  
23  
22  
21  
20  
19  
18  
1
Maxim  
DS1747P  
2
3
. DIP Module Only:  
A13  
A12  
A11  
A10  
A9  
4
5
Standard JEDEC Byte-Wide 512k x 8 Static  
6
WE  
7
RAM Pinout  
OE  
8
CE  
A8  
9
DQ7  
. PowerCap Module Board Only:  
Surface-Mountable Package for Direct  
Connection to PowerCap Containing  
Battery and Crystal  
A7  
A6  
A5  
A4  
A3  
A2  
A1  
A0  
10  
11  
12  
13  
14  
15  
16  
17  
DQ6  
DQ5  
DQ4  
DQ3  
DQ2  
DQ1  
DQ0  
GND  
VBAT  
X1  
GND  
X2  
Replaceable Battery (PowerCap)  
Power-On Reset Output  
Pin-for-Pin Compatible with Other Densities  
of DS174xP Timekeeping RAM  
PowerCap Module Board  
(Uses DS9034PCX+ or DS9034I-PCX+ PowerCap)  
. Also Available in Industrial Temperature  
Range: -40°C to +85°C  
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 16  

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