Datasheet > DS1743

DS1743

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
美信 - MAXIM		时钟
页数	文件大小	规格书
16页	186K
描述
Y2K-Compliant, Nonvolatile Timekeeping

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数据手册

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DS1743 数据手册

DS1743/DS1743P

Y2K-Compliant, Nonvolatile Timekeeping

RAMs

www.maxim-ic.com

FEATURES

PIN CONFIGURATIONS

ꢀ Integrated NV SRAM, Real-Time Clock,

Crystal, Power-Fail Control Circuit, and

Lithium Energy Source

ꢀ Clock Registers are Accessed Identically to

the Static RAM. These Registers Reside in

the Eight Top RAM Locations.

TOP VIEW

N.C.

A12

V_CC

CE2

A11

A10

DQ7

DQ6

DQ5

DQ4

DQ3

DS1743

ꢀ Century Byte Register

ꢀ Totally Nonvolatile with Over 10 Years of

Operation in the Absence of Power

ꢀ BCD-Coded Century, Year, Month, Date,

Day, Hours, Minutes, and Seconds with

Automatic Leap Year Compensation Valid

through 2099

DQ0

DQ1

DQ2

GND

28-Pin Encapsulated Package

(28 PIN 740)

ꢀ Low-Battery-Voltage Level Indicator Flag

ꢀ Power-Fail Write Protection Allows for ±10%

V_CCPower-Supply Tolerance

ꢀ Lithium Energy Source is Electrically

Disconnected to Retain Freshness Until

Power is Applied for the First Time

ꢀ DIP Module Only

Standard JEDEC Bytewide 8k x 8 Static

RAM Pinout

ꢀ PowerCap Module Board Only

Surface-Mountable Package for Direct

Connection to PowerCap Containing

Battery and Crystal

N.C.

DS1743P

N.C.

A12

A11

A10

RST

V_CC

DQ7

DQ6

DQ5

DQ4

DQ3

DQ2

DQ1

DQ0

GND

GND V_BAT

Replaceable Battery (PowerCap)

Power-On Reset Output

34-Pin PowerCap Module Board

(Uses DS9034PCX PowerCap)

Pin-for-Pin Compatible with Other Densities

of DS174XP Timekeeping RAM

ꢀ

Underwriters Laboratories (UL) Recognized

to Prevent Charging of the Internal Lithium

Battery

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 16

REV: 090407

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