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DS1556 PDF预览

DS1556

更新时间: 2024-01-31 08:23:26
品牌 Logo 应用领域
达拉斯 - DALLAS 时钟
页数 文件大小 规格书
20页 483K
描述
1M, Nonvolatile, Y2K-Compliant Timekeeping RAM

DS1556 技术参数

是否无铅: 含铅是否Rohs认证: 不符合
生命周期:Active零件包装代码:DMA
包装说明:, MODULE,34LEAD,1.0针数:34
Reach Compliance Code:not_compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.27
Base Number Matches:1

DS1556 数据手册

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DS1556  
1M, Nonvolatile, Y2K-Compliant  
Timekeeping RAM  
www.maxim-ic.com  
FEATURES  
PIN CONFIGURATIONS  
CꢀIntegrated NV SRAM, Real-Time Clock  
(RTC), Crystal, Power-Fail Control Circuit,  
and Lithium Energy Source  
TOP VIEW  
RST  
A16  
A14  
A12  
A7  
VCC  
A15  
1
32  
31  
30  
29  
28  
27  
26  
25  
24  
23  
22  
21  
20  
19  
18  
17  
Dallas  
CꢀClock Registers are Accessed Identically to  
the Static RAM; These Registers Reside in  
the 16 Top RAM Locations  
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
Semiconductor  
DS1556  
IRQ/FT  
WE  
A13  
A8  
A6  
CꢀCentury Byte Register (i.e., Y2K Compliant)  
A5  
A9  
CꢀTotally Nonvolatile with Over 10 Years of  
A11  
A4  
A3  
OE  
A10  
CE  
Operation in the Absence of Power  
A2  
CꢀPrecision Power-On Reset  
A1  
DQ7  
DQ6  
DQ5  
DQ4  
DQ3  
A0  
DQ0  
DQ1  
DQ2  
GND  
CꢀProgrammable Watchdog Timer and RTC  
Alarm  
CꢀBCD-Coded Year, Month, Date, Day, Hours,  
Minutes, and seconds with Automatic Leap-  
Year Compensation Valid Up to the Year  
2100  
Encapsulated DIP  
CꢀBattery Voltage-Level Indicator Flag  
CꢀPower-Fail Write Protection Allows for M10%  
N.C.  
N.C.  
A14  
34  
33  
32  
31  
30  
29  
28  
27  
26  
25  
24  
23  
22  
21  
20  
19  
18  
IRQ/FT  
A15  
A16  
RST  
VCC  
1
2
3
V
CC Power-Supply Tolerance  
Dallas  
Semiconductor  
DS1556  
CꢀLithium Energy Source is Electrically  
Disconnected to Retain Freshness Until  
Power is Applied for the First Time  
A13  
A12  
A11  
A10  
A9  
4
5
6
7
8
9
WE  
OE  
CE  
A8  
DQ7  
DQ6  
DQ5  
DQ4  
DQ3  
DQ2  
DQ1  
DQ0  
GND  
CꢀAlso Available in Industrial Temperature  
A7  
A6  
A5  
A4  
A3  
A2  
A1  
A0  
10  
11  
12  
13  
14  
15  
16  
17  
Range: -40°C to +85°C  
X1  
GND VBAT  
X2  
PowerCap® Module Board  
(Uses DS9034PCX PowerCap)  
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 20  
REV: 101804  

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