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DS17885E-5+

更新时间： 2024-11-18 03:32:39
品牌 Logo 应用领域
美信 - MAXIM 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
30页 320K
描述
Real-Time Clocks

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中文翻译

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DS17885E-5+ 技术参数

是否无铅：不含铅是否Rohs认证：符合
生命周期：Obsolete零件包装代码：TSOP
包装说明：TSSOP, TSSOP28,.53,22针数：28
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01Factory Lead Time：1 week
风险等级：8.41Is 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-PDSO-G28JESD-609代码：e3
长度：11.8 mm湿度敏感等级：3
端子数量：28计时器数量：1
最高工作温度：70 °C最低工作温度：
封装主体材料：PLASTIC/EPOXY封装代码：TSSOP
封装等效代码：TSSOP28,.53,22封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH峰值回流温度（摄氏度）：260
电源：5 V认证状态：Not Qualified
座面最大高度：1.2 mm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
端子面层：Matte Tin (Sn)端子形式：GULL WING
端子节距：0.55 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：30
易失性：YES宽度：8 mm
uPs/uCs/外围集成电路类型：TIMER, REAL TIME CLOCKBase Number Matches：1

DS17885E-5+ 数据手册

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Rev 0; 4/06  
Real-Time Clocks  
General Description  
Features  
The DS17285, DS17485, DS17885, DS17287, DS17487,  
and DS17887 real-time clocks (RTCs) are designed to be  
successors to the industry-standard DS12885 and  
DS12887. The DS17285, DS17485, and DS17885 (here-  
after referred to as the DS17x85) provide a real-time  
clock/calendar, one time-of-day alarm, three maskable  
interrupts with a common interrupt output, a programma-  
ble square wave, and 114 bytes of battery-backed NV  
SRAM. The DS17x85 also incorporates a number of  
enhanced functions including a silicon serial number,  
power-on/off control circuitry, and 2k, 4k, or 8kbytes of  
battery-backed NV SRAM. The DS17287, DS17487, and  
DS17887 (hereafter referred to as the DS17x87) integrate  
a quartz crystal and lithium energy source into a 24-pin  
encapsulated DIP package. The DS17x85 and DS17x87  
power-control circuitry allows the system to be powered  
on by an external stimulus such as a keyboard or by a  
time-and-date (wake-up) alarm. The PWR output pin is  
triggered by one or either of these events, and is used to  
turn on an external power supply. The PWR pin is under  
software control, so that when a task is complete, the sys-  
tem power can then be shut down.  
♦ Incorporates Industry-Standard DS12887 PC  
Clock Plus Enhanced Functions  
♦ RTC Counts Seconds, Minutes, Hours, Day, Date,  
Month, and Year with Leap Year Compensation  
Through 2099  
♦ Optional +3.0V or +5.0V Operation  
♦ SMI Recovery Stack  
♦ 64-Bit Silicon Serial Number  
♦ Power-Control Circuitry Supports System Power-  
On from Date/Time Alarm or Key Closure  
♦ Crystal Select Bit Allows Operation with 6pF or  
12.5pF Crystal  
♦ 12-Hour or 24-Hour Clock with AM and PM in  
12-Hour Mode  
♦ 114 Bytes of General-Purpose, Battery-Backed NV  
SRAM  
♦ Extended Battery-Backed NV SRAM  
2048 Bytes (DS17285/DS17287)  
4096 Bytes (DS17485/DS17487)  
8192 Bytes (DS17885/DS17887)  
For all devices, the date at the end of the month is auto-  
matically adjusted for months with fewer than 31 days,  
including correction for leap years. It also operates in  
either 24-hour or 12-hour format with an AM/PM indicator.  
A precision temperature-compensated circuit monitors  
♦ RAM Clear Function  
the status of V . If a primary power failure is detected,  
CC  
♦ Interrupt Output with Six Independently Maskable  
the device automatically switches to a backup supply. A  
Interrupt Flags  
lithium coin cell battery can be connected to the V  
BAT  
♦ Time-of-Day Alarm Once per Second to Once per  
input pin on the DS17x85 to maintain time and date oper-  
ation when primary power is absent. The DS17x85 and  
Day  
DS17x87 include a V  
input used to power auxiliary  
BAUX  
♦ End of Clock Update Cycle Flag  
functions such as PWR control. The device is accessed  
♦ Programmable Square-Wave Output  
♦ Automatic Power-Fail Detect and Switch Circuitry  
through a multiplexed byte-wide interface.  
Applications  
♦ Available in PDIP, SO, or TSOP Package  
Embedded Systems  
Utility Meters  
(DS17285, DS17485, DS17885)  
♦ Optional Encapsulated DIP (EDIP) Package with  
Integrated Crystal and Battery (DS17287,  
DS17487, DS17887)  
Security Systems  
Network Hubs, Bridges, and Routers  
♦ Optional Industrial Temperature Range Available  
♦ Underwriters Laboratory (UL) Recognized  
Ordering Information, Pin Configurations, and Typical  
Operating Circuit appear at end of data sheet.  
______________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at  
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.  
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中文翻译

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DS17885E-5+ 替代型号

型号 品牌 替代类型 描述 数据表
DS17885E-5 MAXIM

完全替代

 Real-Time Clocks
DS17885E-3 MAXIM

类似代替

 Real-Time Clocks
DS17885E-3+ MAXIM

功能相似

 Real-Time Clocks

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