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BQ3287 Status: ACTIVE

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


      
         
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Datasheet

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 BQ3287BQ3287A BQ3287E 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 Temp Range(Celsius)-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   5.40 | 1ku  
RTC Bytes14  14  14  14  14  
 SamplesSamplesSamplesSamplesSamples
 InventoryInventoryInventoryInventoryInventory

Customers Who Evaluated This Product Also Evaluated

  • BQ32000: Serial RTC
  • BQ3287A: RTC Module With 114x8 NVSRAM, RAM Clear Input on A Version
  • BQ3285: RTC IC with 114x8 NVSRAM
  • SN74AC74: Dual Positive-Edge-Triggered D-Type Flip-Flops With Clear and Preset
  • MSP430FE4272: 16-Bit Ultra-Low-Power Microcontroller for Energy Meters, 32KB Flash, 1024B RAM
  • THS5641A: 8-Bit, 100 MSPS, CommsDAC(TM) DAC Scalable Current Outputs between 2mA to 20mA

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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
BQ3287MT-IACTIVE-20 to 704.20 | 1kuDIP MODULE (MT) | 24 15 Download CAD Format for this Symbol
BQ3287MT-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 12:15 PM GMT, 24 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 12 WeeksBQ3287MT-I
AmericasArrow 343
Avnet 109
Newark 520
AsiaFarnell Asia 131
WPI 22
EuropeAvnet-SILICA 647
Farnell 131
WorldwideDigiKey 537
TI Lead Time*: 12 WeeksBQ3287MT-SB2
AmericasArrow 498
Rochester Electronics 103
AsiaWPI 81
EuropeArrow Southern Europe 690
WorldwideDigiKey 503
Mouser Electronics 90
View all Distributors  

** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

Quality & Lead (Pb)-Free Data

 Product ContentDPPM / MTBF / FIT Rate
DeviceEco Plan* Lead / Ball FinishMSL Rating / Peak ReflowDetailsDetails
BQ3287MT-I RoHS Compliant Pb-Free (RoHS) Call TI N/A for Pkg TypeViewView
BQ3287MT-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

Most useful technical documents for BQ3287 Help

Datasheet

Customers Who Evaluated This Product Also Evaluated...
Part # Name Product Family Comments
BQ32000 Serial RTC CLOCKS AND TIMERS-REAL-TIME CLOCKS TI customers also evaluated this product.
BQ3287A RTC Module With 114x8 NVSRAM, RAM Clear Input on A Version CLOCKS AND TIMERS-REAL-TIME CLOCKS TI customers also evaluated this product.
BQ3285 RTC IC with 114x8 NVSRAM CLOCKS AND TIMERS-REAL-TIME CLOCKS TI customers also evaluated this product.
BQ4287 RTC Module With 114x8 NVSRAM and NVSRAM Control CLOCKS AND TIMERS-REAL-TIME CLOCKS TI customers also evaluated this product.
BQ3287EA RTC Module w 242x8 NVSRAM Alarm Wake-up RAM Clear Input on EA Version CLOCKS AND TIMERS-REAL-TIME CLOCKS TI customers also evaluated this product.
SN74AC74 Dual Positive-Edge-Triggered D-Type Flip-Flops With Clear and Preset FLIP-FLOPS, LATCHES AND REGISTERS-D-TYPE FLIP-FLOPS TI customers also evaluated this product.
MSP430FE4272 16-Bit Ultra-Low-Power Microcontroller for Energy Meters, 32KB Flash, 1024B RAM MSP430™16-BIT ULTRA-LOW POWER MCUS-4XX 8/16MHZ LCD SERIES TI customers also evaluated this product.
THS5641A 8-Bit, 100 MSPS, CommsDAC(TM) DAC Scalable Current Outputs between 2mA to 20mA DATA CONVERTERS-DIGITAL TO ANALOG CONVERTER TI customers also evaluated this product.
SN74HC02 Quadruple 2-Input Positive-NOR Gates GATES-NOR GATES TI customers also evaluated this product.
LP2985-50 Single Output LDO, 150mA, Fixed(5.0V), 1.5% Tolerance, Low Quiescent Current, Low Noise LINEAR REGULATORS-SINGLE CHANNEL LDO TI customers also evaluated this product.

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