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DS1644P PDF预览

DS1644P

更新时间: 2024-11-18 22:50:47
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
13页 303K
描述
Nonvolatile Timekeeping RAM

DS1644P 技术参数

生命周期:Transferred包装说明:POWERCAP MODULE-34
Reach Compliance Code:unknown风险等级:5.66
最大时钟频率:0.032 MHz外部数据总线宽度:8
信息访问方法:PARALLEL, DIRECT ADDRESS中断能力:N
JESD-30 代码:R-XDMA-U34端子数量:34
计时器数量:最高工作温度:70 °C
最低工作温度:封装主体材料:UNSPECIFIED
封装等效代码:MODULE,34LEAD,1.0封装形状:RECTANGULAR
封装形式:MICROELECTRONIC ASSEMBLY电源:5 V
认证状态:Not Qualified子类别:Timer or RTC
最大供电电压:5.5 V最小供电电压:4.5 V
标称供电电压:5 V表面贴装:YES
技术:CMOS温度等级:COMMERCIAL
端子形式:J INVERTED端子位置:DUAL
最短时间:SECONDS易失性:NO
uPs/uCs/外围集成电路类型:TIMER, REAL TIME CLOCKBase Number Matches:1

DS1644P 数据手册

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DS1644/DS1644P  
Nonvolatile Timekeeping RAM  
www.maxim-ic.com  
FEATURES  
PIN CONFIGURATIONS  
VCC  
WE  
A13  
A8  
A14  
1
28  
27  
CꢀIntegrated NV SRAM, Real-Time Clock,  
Crystal, Power-Fail Control Circuit and  
Lithium Energy Source  
A12  
2
3
4
5
6
7
8
A7  
26  
25  
A6  
A5  
A9  
24  
23  
22  
21  
CꢀClock Registers are Accessed Identically to  
A4  
A11  
OE  
A10  
CE  
DQ7  
DQ6  
DQ5  
DQ4  
DQ3  
the Static RAM. These Registers are  
A3  
Resident in the Eight Top RAM Locations.  
A2  
A1  
A0  
9
20  
19  
18  
17  
16  
15  
CꢀTotally Nonvolatile with Over 10 Years of  
10  
Operation in the Absence of Power  
DQ0  
11  
12  
13  
14  
DQ1  
DQ2  
GND  
CꢀBCD-Coded Year, Month, Date, Day, Hours,  
Minutes, and Seconds with Leap Year  
Compensation Valid Up to 2100  
28-Pin Encapsulated Package  
(720-mil Extended)  
CꢀPower-Fail Write Protection Allows for  
±10% VCC Power Supply Tolerance  
CꢀDS1644 Only (DIP Module)  
NC  
NC  
A14  
34  
33  
32  
31  
30  
29  
28  
27  
26  
25  
24  
23  
22  
21  
20  
19  
18  
1
2
3
NC  
NC  
NC  
Upward Compatible with the DS1643  
Timekeeping RAM to Achieve Higher  
RAM Density  
A13  
A12  
A11  
A10  
A9  
4
5
6
7
8
9
PFO  
VCC  
WE  
OE  
Standard JEDEC Bytewide 32k x 8 Static  
RAM Pinout  
CE  
A8  
DQ7  
A7  
A6  
A5  
A4  
A3  
A2  
A1  
A0  
10  
11  
12  
13  
14  
15  
16  
17  
DQ6  
DQ5  
DQ4  
DQ3  
DQ2  
DQ1  
DQ0  
GND  
CꢀDS1644P Only (PowerCap® Module Board)  
Surface Mountable Package for Direct  
Connection to PowerCap Containing  
Battery and crystal  
X1 GND VBAT  
X2  
Replaceable Battery (PowerCap)  
Power-Fail Output  
34-Pin PowerCap Module Board  
(Uses DS9034PCX PowerCap)  
Pin-for-Pin Compatible with Other Densities  
of DS164XP Timekeeping RAM  
Underwriters Laboratory (UL) Recognized  
PowerCap is a registered trademark of Dallas Semiconductor.  
ORDERING INFORMATION  
VOLTAGE  
PART  
TEMP RANGE PIN-PACKAGE  
TOP MARK  
RANGE (V)  
DS16440120+  
DS16440-120  
DS1644P120+  
DS1644P-120  
5.0  
5.0  
5.0  
5.0  
0°C to +70°C 32 EDIP (0.740a)  
DS1644+120  
DS1644-120  
DS1644P+120  
DS1644P-120  
0°C to +70°C 32 EDIP (0.740a)  
0°C to +70°C 34 PowerCap*  
0°C to +70°C 34 PowerCap*  
*DS9034-PCX, DS9034I-PCX, DS9034-PCX+ required (must be ordered separately).  
A “+" indicates a lead-free product. The top mark will include a “+" symbol on lead-free devices.  
1 of 13  
REV: 040805  

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