DS1341

更新时间： 2024-10-01 06:54:39

品牌	Logo	应用领域
美信 - MAXIM		晶体
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14页	592K
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Low-Current I2C RTCs for High-ESR Crystals

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DS1341 数据手册

19-4998; Rev 0; 10/09

Low-Current I C RTCs for High-ESR Crystals

General Description

Features

The DS1341/DS1342 low-current real-time clocks (RTCs)

are timekeeping devices that provide an extremely low

standby current, which permits longer life from a power

supply. The DS1341/DS1342 support high-ESR crystals,

which broaden the pool of usable crystals for the devices.

The DS1341 uses a 6pF crystal, while the DS1342 uses a

12.5pF crystal. These devices are accessed through an

I C serial interface. Other features include two time-of-day

alarms, two interrupt outputs, a programmable square-

wave output, and a serial bus timeout mechanism.

S Low Timekeeping Current of 250nA (typ)

S Compatible with Crystal ESR Up to 80kI

S Use Crystals with C = 6pF (DS1341) or

C = 12.5pF (DS1342)

S +1.8V to +5.5V Operating Voltage Range

S Maintain Time Down to +1.15V (typ)

S Fast (400kHz) I C Interface

S Bus Timeout for Lockup-Free Operation

S RTC Counts Seconds, Minutes, Hours, Day, Date,

Month, and Year with Leap Year Compensation

Valid Through 2099

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 24hr or 12hr format

with an AM/PM indicator.

S External Clock Source for Synchronization Clock

Reference (e.g., 32kHz, 50Hz/60Hz Power Line,

GPS 1PPS)

The DS1341/DS1342 also include an input for synchroni-

zation. When a reference clock (e.g., 60Hz power line or

GPS 1PPS) is present at the CLKIN pin and the enable

external clock input bit (ECLK) is set to 1, the DS1341/

DS1342 RTCs are frequency-locked to the external clock

and the clock accuracy is determined by the external

source. In case of external clock failure, the clock is

switched to the crystal oscillator.

S Two Time-of-Day Alarms with Two Interrupt

Outputs

S Programmable Square-Wave Output

S Industrial Temperature Range

S Small, 8-Pin µSOP Package

Ordering Information

The devices are available in a lead(Pb)-free/RoHS-

compliant, 8-pin FSOP package. The devices support a

-40NC to +85NC extended temperature range.

PIN-

OSC

PART

TEMP RANGE

PACKAGE C (pF)

DS1341U+

-40NC to +85NC 8 FSOP

DS1341U+T&R

DS1342U+*

Applications

12.5

Medical

Portable Instruments

Portable Audio

Automotive

DS1342U+T&R* -40NC to +85NC 8 FSOP

Point of Sale (POS)

Telematics

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

T&R = Tape and reel.

*Future product—contact factory for availability.

Typical Operating Circuit

Pin Configuration

TOP VIEW

SCL

SDA

SQW/INTB

SCL

CLKIN/INTA

SQW/INTB

DS1341

DS1342

CLKIN/INTA

GND

CPU

SDA

DS1341/DS1342

µSOP

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.

12 3 4 5 6 7...14

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与DS1341相关器件

型号	品牌	获取价格	描述	数据表
DS1341_10	MAXIM	获取价格	Low-Current I2C RTCs for High-ESR Crystals
DS1341_12	MAXIM	获取价格	Low-Current I2C RTCs for High-ESR Crystals
DS1341U+	MAXIM	获取价格	Low-Current I2C RTCs for High-ESR Crystals
DS1341U+T&R	MAXIM	获取价格	Real Time Clock, Volatile, 1 Timer(s), CMOS, PDSO8, ROHS COMPLIANT, USOP-8
DS1341U+TR	MAXIM	获取价格	Low-Current I2C RTCs for High-ESR Crystals
DS1342	MAXIM	获取价格	Low-Current I2C RTCs for High-ESR Crystals
DS1342	ADI	获取价格	低电流I2C RTC，可配合高ESR晶体使用
DS1342T+T&R	MAXIM	获取价格	Real Time Clock, Volatile, 1 Timer(s), CMOS, PDSO8, ROHS COMPLIANT, TDFN-8
DS1342U+	MAXIM	获取价格	Low-Current I2C RTCs for High-ESR Crystals
DS1342U+T&R	MAXIM	获取价格	暂无描述