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BQ3287EAMT BQ3287EAMT is a real-time clock/calendar IC from Texas Instruments with 242 bytes of nonvolatile SRAM, parallel interface, and integrated lithium cell and crystal. Housed in a 24-DIP module.
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BQ3287EAMT

Available from 1 distributors
Mfr Name: Texas Instruments
Texas Instruments
BQ3287EAMT is a real-time clock/calendar IC from Texas Instruments with 242 bytes of nonvolatile SRAM, parallel interface, and integrated lithium cell and crystal. Housed in a 24-DIP module.
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BQ3287EAMT Available from 1 distributor

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BQ3287EAMT Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Date Format
Features
Interface
Memory Size
Mounting Type
Operating Temperature
Supplier Device Package
Time Format
Type
Voltage
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BQ3287EAMT Description

Short technical summary and product information.

The BQ3287EAMT is a low-power CMOS real-time clock/calendar peripheral from Texas Instruments. It provides time-of-day clock and 100-year calendar with alarm features, and includes 242 bytes of general nonvolatile storage. The device supports both 12- and 24-hour time formats, automatic leap-year adjustment, and optional daylight saving adjustment.

 

Key features include three individually maskable interrupt sources, a programmable square-wave output, and a 32.768kHz output for power management. The alarm interrupt is active in battery-backup mode, enabling system wake-up capability. The parallel interface offers a 160 ns cycle time for fast bus operation.

 

The BQ3287EAMT is functionally equivalent to the DS1287/DS1287A and MC146818A/MC146818B. It operates from a 4.5V to 5.5V supply and is specified for 0°C to 70°C operation. The device is supplied in a through-hole 24-DIP module (0.61", 15.49mm) and is suitable for socketed or soldered mounting.

BQ3287EAMT Quick Information

Product Type: Real Time Clock (RTC)
Canonical Name: BQ3287EAMT Real-Time Clock (RTC) with 242B NVSRAM, Parallel Interface, 24-DIP Module
Subcategory: Clock/Calendar

BQ3287EAMT Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

BQ3287EAMT Features

  • Alarm, daylight savings, and leap year adjustment.
  • 242 bytes of nonvolatile SRAM.
  • Parallel interface with 160 ns cycle time.
  • Operates from 4.5V to 5.5V supply.
  • Through-hole 24-DIP module package.

BQ3287EAMT Applications

  • Direct replacement for IBM AT-compatible RTCs.
  • Ideal for embedded systems requiring timekeeping.
  • Supports battery-backup alarm wake-up.
  • Provides 32.768kHz output for power management.

BQ3287EAMT FAQs

7 frequently asked questions generated from this part’s specifications.
What is the supply voltage range for the BQ3287EAMT?

The supply voltage range is 4.5V to 5.5V.

What package does the BQ3287EAMT come in?

It comes in a 24-DIP module (0.61 inch, 15.49mm) with through-hole mounting.

What is the operating temperature range of the BQ3287EAMT?

The operating temperature range is 0°C to 70°C.

Is the BQ3287EAMT RoHS compliant?

The part is marked as RoHS3 compliant, but this is unverified. Verify from official documentation.

What interface does the BQ3287EAMT use?

It uses a parallel interface.

Does the BQ3287EAMT have non-volatile memory?

Yes, it includes 242 bytes of NVSRAM (non-volatile SRAM).

What time and date formats does the BQ3287EAMT support?

It supports HH:MM:SS in 12 or 24 hour format and YY-MM-DD-dd date format.

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