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DS14285 PDF预览

DS14285

更新时间: 2024-11-22 22:40:35
品牌 Logo 应用领域
达拉斯 - DALLAS 计时器或实时时钟微控制器和处理器外围集成电路光电二极管
页数 文件大小 规格书
25页 304K
描述
Real Time Clock with NV RAM Control

DS14285 技术参数

是否Rohs认证: 不符合生命周期:Transferred
包装说明:DIP-24Reach Compliance Code:unknown
风险等级:5.7Is Samacsys:N
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, 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电源:5 V
认证状态:Not QualifiedRAM(字数):114
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易失性:YES
uPs/uCs/外围集成电路类型:TIMER, REAL TIME CLOCKBase Number Matches:1

DS14285 数据手册

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DS14285/DS14287  
Real Time Clock with NV RAM Control  
www.dalsemi.com  
FEATURES  
PIN ASSIGNMENT  
Direct replacement for IBM AT computer  
clock/calendar  
VCCO  
VCC  
SQW  
1
24  
23  
X1  
X2  
AD0  
AD1  
AD2  
2
3
4
Functionally compatible with the  
DS1285/DS1287  
Available as chip (DS14285, DS14285S, or  
DS14285Q) or stand-alone module with  
embedded lithium battery and crystal  
(DS14287)  
Automatic backup supply and write  
protection to make external SRAM  
nonvolatile  
22  
21  
CEO  
CEI  
VBAT  
IRQ  
RESET  
DS  
GND  
R/W  
AS  
5
6
20  
19  
AD3  
AD4  
7
8
18  
17  
AD5  
AD6  
AD7  
9
10  
16  
15  
11  
12  
14  
13  
GND  
CS  
DS14285 24-Pin DIP  
Counts seconds, minutes, hours, days, day of  
the week, date, month, and year with leap  
year compensation valid up to 2100  
Binary or BCD representation of time,  
calendar, and alarm  
DS14285S 24-Pin SOIC  
12- or 24-hour clock with AM and PM in  
12-hour mode  
Daylight Savings Time option  
Multiplex bus for pin efficiency  
Interfaced with software as 128 RAM  
locations  
4
3
2
1
28 27 26  
25  
5
6
7
8
AD0  
AD1  
AD2  
AD3  
AD4  
AD5  
NC  
CEI  
VBAT  
IRQ  
RESET  
DS  
GND  
R/W  
24  
23  
22  
21  
20  
19  
9
10  
11  
12 13 14 15 16 17 18  
– 14 bytes of clock and control registers  
– 114 bytes of general purpose RAM  
Programmable square wave output signal  
DS14285Q 28-Pin PLCC  
Bus-compatible interrupt signals ( IRQ )  
Three interrupts are separately software-  
maskable and testable  
VCC  
VCCO  
NC  
NC  
1
24  
23  
– Time-of-day alarm once/second to  
once/day  
– Periodic rates from 122 µs to 500 ms  
– End of clock update cycle  
SQW  
CEO  
CEI  
2
3
4
22  
21  
AD0  
AD1  
AD2  
NC  
5
6
20  
19  
IRQ  
RESET  
DS  
NC  
R/W  
AS  
AD3  
AD4  
7
8
18  
17  
Optional industrial temperature version  
available DS14285 DIP, SOIC, and PLCC  
AD5  
AD6  
AD7  
9
10  
16  
15  
11  
12  
14  
13  
GND  
CS  
DS14287 24-Pin  
Encapsulated Package  
1 of 25  
080400  

DS14285 替代型号

型号 品牌 替代类型 描述 数据表
BQ4285P-SB2 TI

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