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DS1374

更新时间： 2024-02-19 13:49:13
品牌 Logo 应用领域
美信 - MAXIM 计数器
页数 文件大小 规格书
15页 615K
描述
I2C, 32-Bit Binary Counter Watchdog RTC with Trickle Charger and Reset Input/Output

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DS1374 数据手册

 浏览型号DS1374的Datasheet PDF文件第2页浏览型号DS1374的Datasheet PDF文件第3页浏览型号DS1374的Datasheet PDF文件第4页浏览型号DS1374的Datasheet PDF文件第5页浏览型号DS1374的Datasheet PDF文件第6页浏览型号DS1374的Datasheet PDF文件第7页 
Rev 1; 9/04  
2
I C, 32-Bit Binary Counter Watchdog RTC with  
Trickle Charger and Reset Input/Output  
General Description  
Features  
The DS1374 is a 32-bit binary counter designed to contin-  
uously count time in seconds. An additional counter gen-  
erates a periodic alarm or serves as a watchdog timer. If  
disabled, this counter can be used as 3 bytes of non-  
volatile (NV) RAM. Separate output pins are provided for  
an interrupt and a square wave at one of four selectable  
frequencies. A precision temperature-compensated refer-  
♦ 32-Bit Binary Counter  
♦ Second Binary Counter Provides Time-of-Day  
Alarm, Watchdog Timer, or NV RAM  
♦ Separate Square-Wave and Interrupt Output Pins  
2
♦ I C Serial Interface  
♦ Automatic Power-Fail Detect and Switch Circuitry  
ence and comparator circuit monitor the status of V  
to  
CC  
♦ Single-Pin Pushbutton Reset Input/Open-Drain  
detect power failures, provide a reset output, and auto-  
matically switch to the backup supply when necessary.  
Additionally, the reset pin is monitored as a pushbutton  
input for externally generating a reset. The device is pro-  
Reset Output  
♦ Low-Voltage Operation  
♦ Trickle-Charge Capability  
2
grammed serially through an I C™ serial interface.  
♦ -40°C to +85°C Operating Temperature Range  
♦ 10-Pin µSOP, 16-Pin SO  
♦ Available in a Surface-Mount Package with an  
Integrated Crystal (DS1374C)  
Applications  
♦ Underwriters Laboratory (UL) Recognized  
Portable Instruments  
Point-of-Sale Equipment  
Medical Equipment  
Telecommunications  
Ordering Information  
Typical Operating Circuit  
PIN-  
PART  
TEMP RANGE  
TOP MARK  
PACKAGE  
DS1374U-18 -40°C to +85°C 10 µSOP  
DS1374U-3 -40°C to +85°C 10 µSOP  
DS1374U-33 -40°C to +85°C 10 µSOP  
V
CC  
V
DS1374-18  
DS1374-3  
DS1374-33  
CC  
RPU = t /C  
r
B
CRYSTAL  
RPU RPU  
V
CC  
V
X1  
X2  
CC  
DS1374C-18 -40°C to +85°C 16 SO, 0.300" DS1374C-18  
DS1374C-3 -40°C to +85°C 16 SO, 0.300" DS1374C-3  
SQW  
SCL  
SDA  
CPU  
DS1374C-33 -40°C to +85°C 16 SO, 0.300" DS1374C-33  
DS1374  
INT  
INT  
PRIMARY  
BATTERY,  
Pin Configurations appear at the end of the data sheet.  
V
BACKUP  
RST  
RST  
GND  
RECHARGEABLE  
BATTERY, OR  
SUPER CAPACITOR  
N.O.  
PUSHBUTTON  
RESET  
2
2
I C is a trademark of Philips Corp. Purchase of I C compo-  
nents of Maxim Integrated Products, Inc., or one of its subli-  
censed Associated Companies, conveys a license under the  
2
2
Philips I C Patent Rights to use these components in an I C  
system, provided that the system conforms to the I C Standard  
2
Specification as defined by Philips.  
______________________________________________ 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.  
1234567...15

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