Datasheet > DS1744_1203

DS1744_1203

更新时间： 2024-11-25 07:16:55

品牌	Logo	应用领域
美信 - MAXIM		时钟
页数	文件大小	规格书
16页	552K
描述
Y2K-Compliant, Nonvolatile Timekeeping RAMs

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数据手册

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DS1744_1203 数据手册

19-5502; Rev 3/12

DS1744/DS1744P

Y2K-Compliant, Nonvolatile Timekeeping RAMs

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 are Resident

in the Eight Top RAM Locations.

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

. 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

Up to the Year 2100

TOP VIEW

28 V_CC

A14

A12

DS1744

A13

A11

A10

DQ7

DQ6

DQ5

DQ4

DQ3

DQ0

DQ1

DQ2

GND

. Battery Voltage-Level Indicator Flag

. Power-Fail Write Protection Allows for ±10%

EDIP

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 Byte-Wide 32k x 8 Static

RAM Pinout

. PowerCap Module Board Only

Surface-Mountable Package for Direct

Connection to PowerCap Containing

Battery and Crystal

Replaceable Battery (PowerCap)

Power-On Reset Output

Pin-for-Pin Compatible with Other Densities

of DS174xP Timekeeping RAM

. Also Available in Industrial Temperature

Range: -40°C to +85°C

N.C.

A14

N.C.

RST

V_CC

DS1744P

A13

A12

A11

A10

DQ7

DQ6

DQ5

DQ4

DQ3

DQ2

DQ1

DQ0

GND

V_BAT

GND

PowerCap MODULE BOARD

(Uses DS9034PCX+ or DS9034I-PCX+ PowerCap)

. UL Recognized

1 of 16

12 3 4 5 6 7...16

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