DS1556

更新时间： 2024-11-20 22:50:47

品牌	Logo	应用领域
达拉斯 - DALLAS		时钟
页数	文件大小	规格书
20页	483K
描述
1M, Nonvolatile, Y2K-Compliant Timekeeping RAM

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中文翻译

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数据手册

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DS1556 数据手册

DS1556

1M, Nonvolatile, Y2K-Compliant

Timekeeping RAM

www.maxim-ic.com

FEATURES

PIN CONFIGURATIONS

CꢀIntegrated NV SRAM, Real-Time Clock

(RTC), Crystal, Power-Fail Control Circuit,

and Lithium Energy Source

TOP VIEW

RST

A16

A14

A12

V_CC

A15

Dallas

CꢀClock Registers are Accessed Identically to

the Static RAM; These Registers Reside in

the 16 Top RAM Locations

Semiconductor

DS1556

IRQ/FT

A13

CꢀCentury Byte Register (i.e., Y2K Compliant)

CꢀTotally Nonvolatile with Over 10 Years of

A11

A10

Operation in the Absence of Power

CꢀPrecision Power-On Reset

DQ7

DQ6

DQ5

DQ4

DQ3

DQ0

DQ1

DQ2

GND

CꢀProgrammable Watchdog Timer and RTC

Alarm

CꢀBCD-Coded Year, Month, Date, Day, Hours,

Minutes, and seconds with Automatic Leap-

Year Compensation Valid Up to the Year

2100

Encapsulated DIP

CꢀBattery Voltage-Level Indicator Flag

CꢀPower-Fail Write Protection Allows for M10%

N.C.

A14

IRQ/FT

A15

A16

RST

V_CC

_CCPower-Supply Tolerance

Dallas

Semiconductor

DS1556

CꢀLithium Energy Source is Electrically

Disconnected to Retain Freshness Until

Power is Applied for the First Time

A13

A12

A11

A10

DQ7

DQ6

DQ5

DQ4

DQ3

DQ2

DQ1

DQ0

GND

CꢀAlso Available in Industrial Temperature

Range: -40°C to +85°C

GND V_BAT

PowerCap^®Module Board

(Uses DS9034PCX PowerCap)

PowerCap is a registered trademark of Dallas Semiconductor.

Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device

may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata.

1 of 20

REV: 101804

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