Datasheet > DS1347

DS1347

更新时间： 2022-10-27 11:43:37

品牌	Logo	应用领域
美信 - MAXIM		时钟
页数	文件大小	规格书
17页	223K
描述
Low-Current, SPI-Compatible Real-Time Clock

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DS1347 数据手册

19-6007; Rev 2; 2/12

Low-Current, SPI-Compatible Real-Time Clock

DS1347

General Description

Features

The DS1347 SPI-compatible real-time clock (RTC) con-

tains a real-time clock/calendar and 31 x 8 bits of static

random-access memory (SRAM). The real-time

clock/calendar provides seconds, minutes, hours, day,

date, month, year, and century information. A time/date

programmable polled ALARM is included in the device.

The end-of-the-month date is automatically adjusted for

months with fewer than 31 days, including corrections

for leap year. The clock operates in either the 24hr or

12hr format with an AM/PM indicator. The device oper-

ates with a supply voltage of +2V to +5.5V, are avail-

able in the ultra-small 8-pin TDFN package, and work

over the -40°C to +85°C industrial temperature range.

o RTC Counts Seconds, Minutes, Hours, Day of Week,

Date of Month, Month, Year, and Century

o Leap-Year Compensation

o +2V to +5.5V Wide Operating Voltage Range

o SPI (Mode 1 or 3) Interface: 4MHz at 5V, 1MHz at 2V

o 31 x 8-Bit SRAM for Scratchpad Data Storage

o Uses Standard 32.768kHz Watch Crystal

o Low Timekeeping Current (400nA at 2V)

o Single-Byte or Multiple-Byte (Burst Mode) Data

Transfer for Read or Write of Clock Registers or

SRAM

o Ultra-Small, 3mm x 3mm x 0.8mm, 8-Pin TDFN

Applications

Package

Point-of-Sale Equipment

Intelligent Instruments

Fax Machines

o Programmable Time/Date Polled ALARM Function

o No External Crystal Bias Resistors or Capacitors

Required

Battery-Powered Products

Portable Instruments

Typical Operating Circuit

+3.3V

0.1µF

Ordering Information

OSC C

(pF)

PART

TEMP RANGE

PIN-PACKAGE

+3.3V

DS1347T+

-40°C to +85°C

12.5

8 TDFN-EP*

DS1347

32.768kHz

CRYSTAL

+Denotes a lead(Pb)-free/RoHS-compliant package.

*EP = Exposed pad.

SCLK

µc

DOUT

DIN

GND

________________________________________________________________ Maxim Integrated Products

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.

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