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DS12R885-33 PDF预览

DS12R885-33

更新时间： 2024-11-10 22:12:31
品牌 Logo 应用领域
美信 - MAXIM /
页数 文件大小 规格书
22页 1091K
描述
RTC with Constant-Voltage Trickle Charger

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DS12R885-33 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
零件包装代码：SOIC包装说明：SOP, SOP24,.4
针数：24Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.91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：YJESD-30 代码：R-PDSO-G24
JESD-609代码：e0长度：17.9 mm
端子数量：24计时器数量：1
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：SOP
封装等效代码：SOP24,.4封装形状：RECTANGULAR
封装形式：SMALL OUTLINE电源：3.3 V
认证状态：Not Qualified座面最大高度：2.67 mm
子类别：Timer or RTC最大供电电压：3.63 V
最小供电电压：2.97 V标称供电电压：3.3 V
表面贴装：YES技术：CMOS
温度等级：INDUSTRIAL端子面层：Tin/Lead (Sn/Pb)
端子形式：GULL WING端子节距：1.27 mm
端子位置：DUAL最短时间：SECONDS
易失性：NO宽度：7.5 mm
uPs/uCs/外围集成电路类型：TIMER, REAL TIME CLOCK

DS12R885-33 数据手册

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Rev 1; 4/04  
RTC with Constant-Voltage Trickle Charger  
General Description  
Features  
The DS12R885 is a functional drop-in replacement for  
the DS12885 real-time clock (RTC). The device pro-  
vides an RTC/calendar, one time-of-day alarm, three  
maskable interrupts with a common interrupt output, a  
programmable square wave, and 114 bytes of battery-  
backed static RAM. The date at the end of the month is  
automatically adjusted for months with fewer than 31  
days, including correction for leap years. It also oper-  
ates in either 24-hour or 12-hour format with an AM/PM  
indicator. A precision temperature-compensated circuit  
♦ Trickle-Charge Capability for a Rechargeable  
Battery or Super Cap  
♦ Selectable Intel or Motorola Bus Timing  
♦ RTC Counts Seconds, Minutes, Hours, Day, Date,  
Month, and Year with Leap-Year Compensation to  
2100  
♦ Interrupt Output with Three Independently  
Maskable Interrupt Flags  
♦ Time-of-Day Alarm is Once-per-Second to Once-  
per-Day  
♦ Periodic Rates from 122µs to 500ms  
monitors the status of V . If a primary power failure is  
CC  
detected, the device automatically switches to a back-  
up supply. The V  
pin supports a rechargeable  
BACKUP  
battery or a super cap and includes an integrated,  
always enabled trickle charger. The DS12R885 is  
accessed through a multiplexed byte-wide interface,  
which supports both Intel and Motorola modes. The  
DS12CR887 and DS12R887 integrate the DS12R885  
die with a crystal and battery.  
♦ End-of-Clock Update Cycle Flag  
♦ 14 Bytes of Clock and Control Registers  
♦ 114 Bytes of General-Purpose RAM with Clear Input  
♦ Programmable Square-Wave Output  
♦ Automatic Power-Fail Detect and Switch Circuitry  
♦ +5.0V or +3.3V Operation  
Applications  
♦ Industrial Temperature Range  
Embedded Systems  
Utility Meters  
♦ DS12CR887 Encapsulated DIP (EDIP) Module with  
Integrated Battery and Crystal  
♦ DS12R887 BGA Module Surface-Mountable  
Package with Integrated Crystal and Rechargeable  
Battery  
Security Systems  
Network Hubs, Bridges, and Routers  
Typical Operating Circuit  
Ordering Information  
PIN-  
PACKAGE  
CRYSTAL  
PART  
TEMP RANGE  
-40°C to +85°C  
-40°C to +85°C  
TOP MARK  
V
CC  
24 SO  
(300 mils)  
DS12R885-5  
DS12R885-33  
DS12R885-5  
X1  
AS  
X2  
V
CC  
RESET  
24 SO  
(300 mils)  
DS12R885-33  
DS12CR887-5  
DS12CR887-33  
RCLR  
R/W  
DS  
24 EDIP  
(700 mils)  
DS12CR887-5 -40°C to +85°C  
DS12CR887-33 -40°C to +85°C  
DS83C520  
DS12R885  
CS  
24 EDIP  
(700 mils)  
AD(0–7)  
IRQ  
SQW  
V
BACKUP  
DS12R887-5*  
-40°C to +85°C 48 BGA  
DS12R887-5  
DS12R887-33  
SUPER  
CAP  
MOT  
±
DS12R887-33* -40°C to +85°C 48 BGA  
GND  
*Future product—contact factory for availability.  
Pin Configurations 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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