Datasheet > DS1343

DS1343

更新时间： 2024-10-01 09:55:59

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美信 - MAXIM		/
页数	文件大小	规格书
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描述
Low-Current SPI/3-Wire RTCs

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DS1343 数据手册

19-5801; Rev 1; 12/11

Low-Current SPI/3-Wire RTCs

General Description

Features

SꢀLow_Timekeeping_Current_of_250nA_(typ)

The DS1343/DS1344 low-current real-time clocks (RTCs)

are timekeeping devices that provide an extremely low

standby current, permitting longer life from a backup

supply source. The devices also support high-ESR

crystals, broadening the pool of usable crystals for the

devices. The clock/calendar provides seconds, minutes,

hours, day, date, month, and year information. The date

at the end of the month is automatically adjusted for

months with fewer than 31 days, including corrections

for leap year. The clock operates in either 24-hour or

12-hour format with an AM/PM indicator.

SꢀCompatible_with_Crystal_ESR_Up_to_100kI

SꢀVersions_Available_to_Support_Either_6pF_or_

12.5pF_Crystals

SꢀRTC_Counts_Seconds,_Minutes,_Hours,_Day,_Date,_

Month,_and_Year_with_Leap_Year_Compensation_

Valid_Through_2099

SꢀPower-Fail_and_Switch_Circuitry

SꢀThree_Operating_Voltages

ꢀ 1.8V_ 5ꢁ

Address and data are transferred serially through an

SPI or 3-wire interface. Two programmable time-of-day

alarms are provided. Each alarm can generate an inter-

rupt on a combination of seconds, minutes, hours, and

day. Don’t-care states can be inserted into one or more

fields if it is desired for them to be ignored for the alarm

condition. The time-of-day alarms can be programmed

to assert two different interrupt outputs, or they can be

combined to assert one common interrupt output. Both

interrupt outputs operate when the device is powered by

ꢀ 3.0V 10ꢁ

ꢀ 3.3V_ 10ꢁ

SꢀTrickle-Charge_Capability

SꢀMaintain_Time_Down_to_1.15V_(typ)

SꢀSupport_Motorola_SPI_Modes_1_and_3,_or_Standard_

3-Wire_Interface

SꢀBurst_Mode_for_Reading/Writing_Successive_

Addresses_in_Clock/RAM

Sꢀ96-Byte_Battery-Backed_NV_RAM_for_Data_Storage

either V

or V

BAT

SꢀTwo_Time-of-Day_Alarms_with_Two_Interrupt_

The devices are available in a lead-free/RoHS-compliant,

20-pin TSSOP or 14-pin TDFN package, and support a

-40°C to +85°C extended industrial temperature range.

Outputs

SꢀIndustrial_Temperature_Range

Sꢀ20-Pin_TSSOP_or_14-Pin_TDFN_Package

SꢀUnderwriters_Laboratories_(UL)_Recognized

Applications

Medical

Handheld Devices

Telematics

Typical Operating Circuit

Embedded Timestamping

INT

RST

INT0

INT1

SCLK

SDI

μP

DS1343

DS1344

Ordering Information appears at end of data sheet.

3-WIRE

PORT

SDO

BAT

SERMODE GND

NOTE: SHOWN IN 3-WIRE I/O CONFIGURATION.

_ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ _Maxim Integrated Products_ _ 1

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...20

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与DS1343相关器件

型号	品牌	获取价格	描述	数据表
DS1343_1112	MAXIM	获取价格	Low-Current SPI/3-Wire RTCs
DS1343D-18+	MAXIM	获取价格	Low-Current SPI/3-Wire RTCs Low Timekeeping Current of 250nA (typ)
DS1343D-18+T&R	MAXIM	获取价格	Real Time Clock, 1 Timer(s), CMOS, PDSO14, ROHS COMPLIANT, TDFN-14
DS1343D-3+	MAXIM	获取价格	Low-Current SPI/3-Wire RTCs Low Timekeeping Current of 250nA (typ)
DS1343D-3+T&R	MAXIM	获取价格	Real Time Clock, 1 Timer(s), CMOS, PDSO14, ROHS COMPLIANT, TDFN-14
DS1343D-33+	MAXIM	获取价格	Low-Current SPI/3-Wire RTCs Low Timekeeping Current of 250nA (typ)
DS1343E-18+	MAXIM	获取价格	Low-Current SPI/3-Wire RTCs Low Timekeeping Current of 250nA (typ)
DS1343E-3+	MAXIM	获取价格	Low-Current SPI/3-Wire RTCs Low Timekeeping Current of 250nA (typ)
DS1343E-3+T&R	MAXIM	获取价格	Real Time Clock, 1 Timer(s), CMOS, PDSO20, ROHS COMPLIANT, TSSOP-20
DS1343E-33+	MAXIM	获取价格	Low-Current SPI/3-Wire RTCs Low Timekeeping Current of 250nA (typ)

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