BQ3287MT

Real Time Clock, Non-Volatile, 1 Timer(s), CMOS, PDIP24,
3,598 Effective Inventory

BQ3287MT

Effective Inventory3,598

Real Time Clock, Non-Volatile, 1 Timer(s), CMOS, PDIP24,

Quality Assurance

Quality Assurance

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Certification

We have successfully obtained various certification standards and have established our own professional testing laboratory. This ensures that every product we supply to our customers meets the highest quality standards. We adhere to strict testing protocols to maintain the consistency and accuracy of our products. To ensure that our products are original and genuine, we also collaborate with reputable third-party testing facilities to conduct rigorous quality testing. Our commitment to quality extends to meeting industry, legal, regulatory, and ISO 9001:2015 requirements.

Shipping & Payment

Shipping & Payment

About Shipping

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Service & Packaging

Service & Packaging

About After Sales Service

All Parts Extended Quality Guarantee

Initiate the application within 90 days from the shipment date.

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Maintain the goods in their original condition as received.

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About packaging

Regarding packaging, our products are carefully packed in anti-static bags to provide ESD anti-static protection. The outer packaging is durable with secure closure. We support various packaging methods such as Tape and Reel, Cut Tape, Tube, or Tray.

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BQ3287MT DataSheet
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Current price plan is under preparation. Please contact our customer service team for the latest pricing information. Thank you for your understanding and support!

Rapid Quote

Please submit RFQ for BQ3287MT or email to us: Email: [email protected], we will contact you in 12 hours.

Details

[UNITRODE]General DescriptionThe CMOS bq3285 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.Features➤ Direct clock/calendar replacement for IBM® AT-compatible computers and other applications➤ Functionally compatible with the DS1285 - Closely matches MC146818A pin configuration➤ 114 bytes of general nonvolatile storage➤ 160ns cycle time allows fast bus operation➤ Selectable Intel or Motorola bus timing➤ Less than 0.5µA load under battery operation➤ 14 bytes for clock/calendar and control➤ BCD or binary format for clock and calendar data➤ Calendar in day of the week, day of the month, months, and years, with automatic leap-year adjustment➤ Time of day in seconds, minutes, and hours - 12- or 24-hour format - Optional daylight saving adjustment➤ Programmable square wave output➤ Three individually maskable interrupt event flags: - Periodic rates from 122µs to 500ms - Time-of-day alarm once per second to once per day - End-of-clock update cycle➤ 24-pin plastic DIP or SOIC

Key Features

  • ➤ Direct clock/calendar replacement for IBM® AT-compatible computers and other applications
  • ➤ Functionally compatible with the DS1285
  • - Closely matches MC146818A pin configuration
  • ➤ 114 bytes of general nonvolatile storage
  • ➤ 160ns cycle time allows fast bus operation
  • ➤ Selectable Intel or Motorola bus timing
  • ➤ Less than 0.5µA load under battery operation
  • ➤ 14 bytes for clock/calendar and control
  • ➤ BCD or binary format for clock and calendar data
  • ➤ Calendar in day of the week, day of the month, months, and years, with automatic leap-year adjustment
  • ➤ Time of day in seconds, minutes, and hours
  • - 12- or 24-hour format
  • - Optional daylight saving adjustment
  • ➤ Programmable square wave output
  • ➤ Three individually maskable interrupt event flags:
  • - Periodic rates from 122µs to 500ms
  • - Time-of-day alarm once per second to once per day
  • - End-of-clock update cycle
  • ➤ 24-pin plastic DIP or SOIC

Specifications

The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Rohs Code No Part Life Cycle Code Obsolete
Reach Compliance Code Additional Feature ! SELECTABLE INTEL/MOTOROLA TIMING; 10 YEARS DATA RETENTION; ACCURACY 1 MIN/MONTH @ 25 DEGREE C
External Data Bus Width 8 Information Access Method PARALLEL, MUXED BUS
Interrupt Capability ! Y JESD-30 Code R-PDIP-P24
JESD-609 Code e0 Number of Terminals 24
Number of Timers 1 On Chip Data RAM Width 8
Operating Temperature-Max 70 °C Operating Temperature-Min
Output Clock Frequency-Max 0.008192 MHz Package Body Material PLASTIC/EPOXY
Package Code DIP Package Equivalence Code DIP24,.6
Package Shape RECTANGULAR Package Style IN-LINE
Power Supplies ! 5 V Qualification Status ! Not Qualified
RAM (words) 114 Supply Current-Max 15 mA
Supply Voltage-Max 5.5 V Supply Voltage-Min 4.5 V
Supply Voltage-Nom 5 V Surface Mount ! NO
Technology CMOS Temperature Grade ! COMMERCIAL
Terminal Finish TIN LEAD Terminal Form ! PIN/PEG
Terminal Pitch ! 2.54 mm Terminal Position DUAL
Time-Min SECONDS Volatile NO
uPs/uCs/Peripheral ICs Type TIMER, REAL TIME CLOCK

Datasheet PDF

Datasheets record the features, absolute maximum ratings, applications and more of the device, which benefit a lot as an overall guide to the specific application of the part.

Preliminary Specification BQ3287MT PDF Download

FAQs

What is BQ3287MT?

The BQ3287MT is a real-time clock (RTC) module designed by Texas Instruments. It provides timekeeping and calendar functions, making it suitable for use in applications such as smart meters, industrial controllers, and embedded systems that require accurate timekeeping.

How Does BQ3287MT Work?

The BQ3287MT operates by receiving an initial time and date setting and then continuously updating the time and date based on an internal oscillator. It utilizes a backup battery to retain timekeeping data during power loss or when the main power source is unavailable. The RTC module also features alarm functions for time-based events.

How Many Pins does BQ3287MT have and What are the Functions of the Pinout Configuration?

The BQ3287MT is housed in a 24-pin SOIC (Small Outline Integrated Circuit) package. The pinout configuration includes:

  • VCC: Power supply pin.
  • GND: Ground pin.
  • X1, X2: Crystal oscillator input and output pins.
  • VBACKUP: Backup battery input pin.
  • SDA, SCL: Serial interface control pins for I2C communication.
  • IRQOUT: Interrupt output pin.
  • VDET: Power-fail detect output pin.

What are the Pros and Cons of BQ3287MT?

Pros:

  • Accurate Timekeeping: Provides accurate real-time clock and calendar functions for precise time tracking.
  • Battery Backup: Utilizes a backup battery to retain timekeeping data during power loss.
  • Alarm Functions: Includes alarm capabilities for scheduling time-based events or notifications.
  • I2C Interface: Supports I2C communication for easy integration into digital systems.
  • Wide Operating Voltage Range: Suitable for applications with varying supply voltage requirements.

Cons:

  • Package Size: The 24-pin SOIC package may be relatively larger for space-constrained designs.
  • Complexity: Requires careful consideration of crystal selection and layout for optimal performance.
  • External Components: May require additional external components for certain functionalities or to meet specific application requirements.

Are There Any Equivalents/Alternatives to BQ3287MT for Recommendation?

  • The DS3231 from Maxim Integrated is a similar real-time clock module with additional integrated temperature compensation.
  • Alternatives to the BQ3287MT include the RV-2123 from Micro Crystal and the MCP7940M from Microchip Technology.

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