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DS1385 PDF预览

DS1385

更新时间: 2024-11-15 22:50:47
品牌 Logo 应用领域
达拉斯 - DALLAS 时钟
页数 文件大小 规格书
20页 146K
描述
RAMified Real Time Clock 4K x 8

DS1385 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
Reach Compliance Code:unknown风险等级:8.83
其他特性:DAYLIGHT SAVINGS OPTION外部数据总线宽度:8
信息访问方法:PARALLEL, MUXED BUS中断能力:Y
JESD-30 代码:R-PDIP-T24JESD-609代码:e0
端子数量:24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 Qualified
RAM(字数):50子类别:Timer or RTC
最大压摆率:50 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:YES
uPs/uCs/外围集成电路类型:TIMER, REAL TIME CLOCK

DS1385 数据手册

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DS1385/DS1387  
DS1385/DS1387  
RAMified Real Time Clock 4K x 8  
FEATURES  
PIN ASSIGNMENT  
Upgraded IBM AT computer clock/calendar with  
4K x 8 extended RAM  
OER  
X1  
1
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
14  
13  
V
OER  
NC  
1
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
14  
13  
V
CC  
CC  
2
SQW  
AS0  
AS1  
2
SQW  
AS0  
AS1  
NC  
Totally nonvolatile with over 10 years of operation in  
the absence of power  
X2  
3
NC  
3
AD0  
AD1  
AD2  
AD3  
AD4  
AD5  
AD6  
AD7  
GND  
4
AD0  
AD1  
AD2  
AD3  
AD4  
AD5  
AD6  
AD7  
GND  
4
5
V
5
BAT  
Counts seconds, minutes, hours, day of the week,  
date, month and year with leap year compensation  
6
IRQ  
WER  
RD  
6
IRQ  
WER  
RD  
7
7
8
8
Binary or BCD representations of time, calendar and  
alarm  
9
GND  
WR  
ALE  
CS  
9
NC  
10  
11  
12  
10  
11  
12  
WR  
ALE  
CS  
12– or 24–hour clock with AM and PM in 12–hour  
mode  
DS1385 24–PIN DIP  
(600 MIL)  
DS1387 24–PIN  
ENCAPSULATED PACKAGE  
(740 MIL FLUSH)  
Daylight Savings Time option  
Multiplex bus for pin efficiency  
Interfaced with software as 64 user RAM locations  
plus 4K x 8 of static RAM  
14–bytes of clock and control registers  
50–bytes of general purpose RAM  
OER  
X1  
1
28  
27  
26  
25  
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
V
CC  
2
SQW  
NC  
X2  
3
4K x 8 SRAM accessible by using separate con-  
trol pins  
NC  
4
AS0  
AS1  
AD0  
AD1  
AD2  
AD3  
AD4  
AD5  
AD6  
AD7  
NC  
5
6
V
Programmable square wave output signal  
Bus–compatible interrupt signals (IRQ)  
BAT  
7
IRQ  
WER  
RD  
8
9
Three interrupts are separately software–maskable  
and testable:  
10  
11  
12  
13  
14  
BGND  
WR  
ALE  
CS  
Time–of–day alarm once/second to once/day  
Periodic rates from 122 µs to 500 ms  
End–of–clock update cycle  
GND  
NC  
DS1385S 28–PIN SOIC  
(330 MIL)  
Available as chip (DS1385 or DS1385S) or stand  
alone module with embedded lithium battery and  
crystal (DS1387)  
ORDERING INFORMATION  
DS1385  
DS1385S  
DS1387  
RTC Chip; 24–pin DIP  
RTC Chip; 28–pin SOIC  
RTC Module; 24–pin DIP  
ECopyright 1995 by Dallas Semiconductor Corporation.  
All Rights Reserved. For important information regarding  
patents and other intellectual property rights, please refer to  
Dallas Semiconductor data books.  
012496 1/20  

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