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DS1287 PDF预览

DS1287

更新时间: 2024-02-07 10:58:19
品牌 Logo 应用领域
达拉斯 - DALLAS 时钟
页数 文件大小 规格书
1页 24K
描述
Real Time Clock

DS1287 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
包装说明:DIP, DIP24,.6Reach Compliance Code:unknown
风险等级:5.82其他特性:DAYLIGHT SAVINGS OPTION; SELECTABLE MOTOROLA/INTEL TIMING; 10 YEARS DATA RETENTION; RAM CLEAR I/P
外部数据总线宽度:8信息访问方法:PARALLEL, MUXED BUS
中断能力:YJESD-30 代码:R-PDIP-T19
JESD-609代码:e0端子数量:19
计时器数量:1片上数据RAM宽度:8
最高工作温度:70 °C最低工作温度:
最大输出时钟频率:0.008192 MHz封装主体材料:PLASTIC/EPOXY
封装代码:DIP封装等效代码:DIP24,.6
封装形状:RECTANGULAR封装形式:IN-LINE
峰值回流温度(摄氏度):NOT SPECIFIED电源:5 V
认证状态:Not QualifiedRAM(字数):50
子类别:Timer or RTC最大压摆率:15 mA
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:NO
技术:CMOS温度等级:COMMERCIAL
端子面层:Tin/Lead (Sn/Pb)端子形式:THROUGH-HOLE
端子节距:2.54 mm端子位置:DUAL
最短时间:SECONDS处于峰值回流温度下的最长时间:NOT SPECIFIED
易失性:NOuPs/uCs/外围集成电路类型:TIMER, REAL TIME CLOCK

DS1287 数据手册

  
DS1287  
DS1287  
Real Time Clock  
FEATURES  
PIN ASSIGNMENT  
Drop-in replacement for IBM AT computer clock/ca-  
lendar  
MOT  
NC  
1
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
14  
13  
V
CC  
2
SQW  
NC  
Pin compatible with the MC146818A  
NC  
3
Totally nonvolatile with over 10 years of operation in  
the absence of power  
AD0  
AD1  
AD2  
AD3  
AD4  
AD5  
AD6  
AD7  
GND  
4
NC  
5
NC  
6
IRQ  
RESET  
DS  
Self-contained subsystem includes lithium, quartz,  
and support circuitry  
7
8
Counts seconds, minutes, hours, day of the week,  
date, month, and year with leap year compensation  
9
NC  
10  
11  
12  
R/W  
AS  
Binary or BCD representation of time, calendar, and  
alarm  
CS  
12- or 24-hour clock with AM and PM in 12-hour mode  
Daylight Savings Time option  
24 PIN ENCAPSULATED PACKAGE  
PIN DESCRIPTION  
Selectable between Motorola and Intel bus timing  
Multiplex bus for pin efficiency  
AD0–AD7  
NC  
MOT  
CS  
AS  
R/W  
DS  
RESET  
IRQ  
drain)  
SQW  
-
-
-
-
-
-
-
-
-
Multiplexed address/data bus  
No connection  
Bus type selection  
Chip select  
Address strobe  
Read/write input  
Data strobe  
Reset input  
Interrupt request output (open  
Interfaced with software as 64 RAM locations  
14 bytes of clock and control registers  
50 bytes of general purpose RAM  
Programmable square wave output signal  
Bus-compatible interrupt signals (IRQ)  
Three interrupts are separately software-maskable  
and testable  
-
-
-
Square wave output  
+5 volt supply  
Ground  
V
CC  
GND  
Time-of-day alarm once/second to once/day  
Periodic rates from 122 µs to 500 ms  
End of clock update cycle  
DESCRIPTION  
The DS1287 Real Time Clock is designed to be a direct  
replacement for the MC146818A. For a complete  
description of operating conditions, electrical and  
mechanicalcharacteristics, bus timing, and pin descrip-  
tions see the DS12887 data sheet.  
050898 1/1  

DS1287 替代型号

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1 TIMER(S), REAL TIME CLOCK, PDIP24, 0.600 INCH, PLASTIC, DIP-24