Datasheet > DS1346T+

DS1346T+

更新时间： 2022-10-27 11:43:41

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美信 - MAXIM		时钟
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17页	221K
描述
Low-Current, SPI-Compatible Real-Time Clocks

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DS1346T+ 数据手册

19-6007; Rev 0; 8/11

Low-Current, SPI-Compatible Real-Time Clocks

6/DS1347

General Description

Features

The DS1346/DS1347 SPI™-compatible real-time clocks

(RTCs) contain 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 devices. 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

devices operate with a supply voltage of +2V to +5.5V,

are available in the ultra-small 8-pin TDFN package,

and work over the -40°C to +85°C industrial tempera-

ture range.

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

Date of Month, Month, Year, and Century

♦ Leap-Year Compensation

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

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

♦ 31 x 8-Bit SRAM for Scratchpad Data Storage

♦ Uses Standard 32.768kHz Watch Crystal

♦ Low Timekeeping Current (400nA at 2V)

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

Transfer for Read or Write of Clock Registers or

SRAM

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

Package

Applications

Point-of-Sale Equipment

Intelligent Instruments

Fax Machines

♦ Programmable Time/Date Polled ALARM Function

♦ 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

DS1346T+*

DS1347T+

-40°C to +85°C

8 TDFN-EP**

DS1346

DS1347

32.768kHz

CRYSTAL

12.5

SCLK

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

*Future product—contact factory for availability.

**EP = Exposed pad.

μc

DOUT

DIN

GND

SPI is a trademark of Motorola, Inc.

________________________________________________________________ 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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