TI Home > Semiconductors > Clocks and Timers > Real-time Clock >

BQ3287A Status: ACTIVE

RTC Module With 114x8 NVSRAM, RAM Clear Input on A Version


      
         
Alert me about changes<br/>to this product


Datasheet

Download - PDF Icon

 BQ3287 BQ3287ABQ3287E BQ3287EA BQ4287 
Supply Voltage(V)5  5  5  5  5  
Bus InterfaceMultiplexed  Multiplexed  Multiplexed  Multiplexed  Multiplexed  
Memory Density(Kb)0.114  0.114  0.242  0.242  0.114  
Operating Temperature Range(°C)-20 to 70,0 to 70  -20 to 70,0 to 70  0 to 70  0 to 70  0 to 70  
Pin/Package24DIP MODULE  24DIP MODULE  24DIP MODULE  24DIP MODULE  24DIP MODULE  
Approx. Price (US$) 4.20 | 1ku   4.20 | 1ku   4.20 | 1ku   4.20 | 1ku   5.80 | 1ku  
RTC Bytes14  14  14  14  14  
 SamplesSamplesSamplesSamplesSamples
 InventoryInventoryInventoryInventoryInventory

Customers Who Evaluated This Product Also Evaluated

  • BQ3287EA: RTC Module w 242x8 NVSRAM Alarm Wake-up RAM Clear Input on EA Version
  • BQ3287: RTC Module with 114x8 NVSRAM, RAM Clear Input on A Version
  • UA78M33: 3/4 Pin 500mA Fixed 3.3V Positive Voltage Regulator

Product Information

Features

  • Direct clock/calendar replacement for IBM\xAE AT-compatible computers and other applications
  • Functionally compatible with the DS1287/DS1287A and MC146818A
  • 114 bytes of general nonvolatile storage
  • Integral lithium cell and crystal
  • 160 ns cycle time allows fast bus operation
  • Selectable Intel or Motorola bus timing
  • 14 bytes for clock/calendar and control
  • BCD or binary format for clock and calendar data
  • Time of day in seconds, minutes, and hours
    • 12- or 24-hour format
    • Optional daylight saving adjustment
  • Calendar in day of the week, day of the month, months, and years with automatic leap-year adjustment
  • Programmable square wave output
  • Three individually maskable interrupt event flags:
    • Periodic rates from 122us to 500ms
    • Time-of-day alarm once per second to once per day
    • End-of-clock update cycle
  • Better than one minute per month clock accuracy

Description

The CMOS bq3287/bq3287A is a low-power microprocessor peripheral providing a time-of-day clock and 100-year calendar with alarm features and battery operation. Other features include three maskable interrupt sources, square-wave output, and 114 bytes of general nonvolatile storage. The bq3287A version is identical to the bq3287, with the addition of the RAM clear input.

The bq3287 is a fully compatible real-time clock for IBM AT-compatible computers and other applications. The bq3287 write-protects the clock, calendar, and storage registers during power failure. The integral backup energy source then maintains data and operates the clock and calendar.

As shipped from Benchmarq, the real time clock is turned off to maximize battery capacity for in-system operation.

View All Description in Datasheet

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsPackage QTY | Package CarrierSymbolsSamples
BQ3287AMT-IACTIVE-20 to 704.20 | 1kuDIP MODULE (MT) | 24 15 Download CAD Format for this SymbolPurchase Samples
BQ3287AMT-SB2ACTIVE0 to 704.20 | 1kuDIP MODULE (MT) | 24 15 Download CAD Format for this Symbol

* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

Inventory

Reported Distributor Inventory as of 11:25 AM GMT, 08 Sep 2010
RegionCompanyIn StockPurchase
BQ3287AMT-I
AmericasRochester Electronics 130
WorldwideMouser Electronics 75
BQ3287AMT-SB2
AmericasNewark 34
Rochester Electronics >1k
AsiaFarnell Asia 76
WPI >1k
View all Distributors   

Please contact your preferred TI Authorized Distributor or local TI sales office for lead times on full production quantities.

Quality & Lead (Pb)-Free Data

 Product ContentDPPM / MTBF / FIT Rate
DeviceEco Plan* Lead / Ball FinishMSL Rating / Peak ReflowDetailsDetails
BQ3287AMT-I RoHS Compliant Pb-Free (RoHS) Call TI N/A for Pkg TypeViewView
BQ3287AMT-SB2 RoHS Compliant Pb-Free (RoHS) Call TI N/A for Pkg TypeViewView

* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

Technical Documents

Datasheet

Application Notes

Customers Who Evaluated This Product Also Evaluated...
Part # Name Product Family Comments
BQ3287EA RTC Module w 242x8 NVSRAM Alarm Wake-up RAM Clear Input on EA Version CLOCKS AND TIMERS-REAL-TIME CLOCK TI customers also evaluated this product.
BQ3287 RTC Module with 114x8 NVSRAM, RAM Clear Input on A Version CLOCKS AND TIMERS-REAL-TIME CLOCK TI customers also evaluated this product.
UA78M33 3/4 Pin 500mA Fixed 3.3V Positive Voltage Regulator LINEAR REGULATORS-STANDARD VOLTAGE REGULATOR TI customers also evaluated this product.

Support and Community

Contents are provided "AS IS" by the respective TI and Community contributors and do not constitute TI specifications. See Terms of Use.

Customer Tags Help

No Tags are Available for this Part Number

Other Support



Click Here