DS1254WB2-150 datasheet, PDF - EEWORLD Datasheet

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DS1254WB2-150: DescriptionReal Time Clock 2M X 8 NV SRAM w/Phantom Clock; Categorysemiconductor Analog mixed-signal IC; File Size158KB，17 Pages; ManufacturerMaxim; Websitehttps://www.maximintegrated.com/en.html

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DS1254WB2-150 Overview

Real Time Clock 2M X 8 NV SRAM w/Phantom Clock

DS1254WB2-150 Parametric

Parameter Name	Attribute value
Product Category	Real Time Clock
Manufacturer	Maxim
RoHS	No
Mounting Style	SMD/SMT
Package / Case	BGA
RTC Bus Interface	Parallel
Supply Voltage - Max	3.7 V
Supply Voltage - Min	3 V
Maximum Operating Temperature	+ 70 C
Minimum Operating Temperature	0 C
Packaging	Tube
Operating Supply Current	50 mA
Factory Pack Quantity	21

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19-4621; 12/09

DS1254

2M x 8 NV SRAM with Phantom Clock

www.maxim-ic.com

GENERAL DESCRIPTION

The DS1254 is a fully nonvolatile static RAM (NV SRAM)

(organized as 2M words by 8 bits) with built-in real-time

clock. It has a self-contained lithium energy source and

control circuitry that constantly monitors V

for an out-of-

tolerance condition. When such a condition occurs, the

DS1254 makes use of an attached DS3800 battery cap to

maintain clock information and preserve stored data while

protecting that data by disallowing all memory accesses.

Additionally, the DS1254 has dedicated circuitry for

monitoring the status of an attached DS3800 battery cap.

PACKAGE OUTLINE

FEATURES



Real-Time Clock (RTC) Keeps Track of Hundredths of

Seconds, Seconds, Minutes, Hours, Days, Date,

Months, and Years with Automatic Leap-Year

Compensation Valid Up to the Year 2100

2M x 8 NV SRAM

Watch Function is Transparent to RAM Operation

Automatic Data Protection During Power Loss

Unlimited Write-Cycle Endurance

Surface-Mountable BGA Module Construction

Over 10 Years of Data Retention in the Absence of

Power

Battery Monitor Checks Remaining Capacity Daily

+3.3V Operation

Underwriters Laboratory (UL) Recognized

(www.maxim-ic.com/qa/info/ul/)

Side -A- Shown

(For Reference Only, Not to Scale)

Component placement may vary.

TYPICAL OPERATING CIRCUIT



+3.3V



APPLICATIONS

Telecom Switches

Routers

RAID Systems

ORDERING INFORMATION

PART

DS1254WB-150

DS1254WB2-150

TEMP RANGE

0°C to +70°C

PIN-PACKAGE

40mm BGA

VOLTAGE RANGE

(V)

3.3

TOP MARK

DS1254W-150

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.

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