Real-Time Clocks (RTCs)

Real-Time Clocks by Dallas Semiconductor (Maxim) and Texas Instruments (Benchmarq)

Tech Tip: Be sure to read the Real-Time Clock (RTC) FAQ before ordering or replacing a device in your system. Click here to view the FAQ. 

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24 Pin DIP Socket
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24 Pin DIP Socket for RTC Modules
24 Pin DIP Socket For RTC Modules
24-pin DIP socket for RTC modules (requires soldering).  Purchase this item if the RTC module to be replaced is soldered directly to the PC board.

Dallas Semiconductor DS12887
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Dallas Semiconductor Dallas Semiconductor Maxim DS12887, DS12887A, DS12C887, DS12C887A Series Real-Time Clock (RTC) Modules
DS12887 24 Pin DIP RTC Module

24-pin DIP Real-Time Clock (RTC) plus RAM. Designed to be a direct replacement for the DS1287, BQ3287MT, M48T86, TH6887, OEC12C887, et al. The DS12887 is identical in form fit and function to the DS1287 and has an additional 64 bytes of general-purpose RAM.

NOTE: The DS12887 CANNOT replace the DS1287 in 80286-based computers.

This product is an ESD-class device. It cannot be returned for exchange or credit if the package has been opened. Please read the RTC Module FAQ in its entirety BEFORE ordering or replacing an RTC module.

Dallas Semiconductor DS12887A
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Dallas Semiconductor Maxim DS12887, DS12887A, DS12C887, DS12C887A Series Real-Time Clock (RTC) Modules
DS12887A 24 Pin DIP RTC Module w/CMOS Reset
24-pin DIP Real-Time Clock (RTC) plus RAM with CMOS reset capability. Designed to be a direct replacement for the DS1287A, BQ3287AMT, M48T86A, TH6887A, OEC12C887, et al. The DS12887 is identical in form fit and function to the DS1287 and has an additional 64 bytes of general-purpose RAM.

NOTE: The DS12887 CANNOT replace the DS1287A in 80286-based computers.

This product is an ESD-class device. It cannot be returned for exchange or credit if the package has been opened. Please read the RTC Module FAQ in its entirety BEFORE ordering or replacing an RTC module.

Dallas Semiconductor DS12C887
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Weight: lbs
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Dallas Semiconductor Maxim DS12887, DS12887A, DS12C887, DS12C887A Series Real-Time Clock (RTC) Modules
DS12C887 Y2K-compliant 24 Pin DIP RTC Module
24-pin DIP Real-Time Clock (RTC) plus RAM. Designed to be a Y2K-compliant replacement for the DS1287 BQ3287MT M48T86 OEC12C887 et al. The DS12C887 is identical in form fit and function to the DS1287 and has an additional 64 bytes of general-purpose RAM.

NOTE: The DS12C887 CANNOT replace the DS1287 in 80286-based computers. This device is compatible with AMI and Phoenix BIOS systems. It may not be compatible with AWARD 4.50G and 4.51PG BIOS unless the firmware has been upgraded. If the system requiring replacement is using a DS12887, BQ3287MT or Odin OEC12C887 and is not exhibiting issues with year 2000 and beyond dates, use the DS12887 instead of the DS12C887.

This product is an ESD-class device. It cannot be returned for exchange or credit if the package has been opened. Please read the RTC Module FAQ in its entirety BEFORE ordering or replacing an RTC module.

Dallas Semiconductor DS12C887A
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Weight: lbs
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Dallas Semiconductor Maxim DS12887, DS12887A, DS12C887, DS12C887A Series Real-Time Clock (RTC) Modules
DS12C887A Y2K-compliant 24 Pin DIP RTC Module

24-pin DIP Real-Time Clock (RTC) plus RAM. Designed to be a Y2K-compliant replacement for the DS1287A, BQ3287AMT, M48T86A, OEC12C887A et al. The DS12C887A is identical in form fit and function to the DS1287A and has an additional 64 bytes of general-purpose RAM.

NOTE: The DS12C887A CANNOT replace the DS1287 in 80286-based computers. This device is compatible with AMI and Phoenix BIOS systems. It may not be compatible with AWARD 4.50G and 4.51PG BIOS unless the firmware has been upgraded. If the system requiring replacement is using a DS12887A, BQ3287AMT or Odin OEC12C887A and is not exhibiting issues with year 2000 and beyond dates, use the DS12887A instead of the DS12C887A.

This product is an ESD-class device. It cannot be returned for exchange or credit if the package has been opened. Please read the RTC Module FAQ in its entirety BEFORE ordering or replacing an RTC module.

Texas Instruments BQ4287MT
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Weight: lbs
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Texas Instruments BQ4287MT RTC Module
BQ4287MT-SB2 (Benchmarq) BQ4287MT 24 pin DIP RTC Module

24-pin DIP Real-Time Clock (RTC) plus RAM. The BQ4287 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 BQ4287 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.

The BQ4287 uses its integral battery-backup controller and battery to make a standard CMOS SRAM nonvolatile during power-fail conditions. During power-fail, the bq4287 automatically write-protects the external SRAM and provides a VCC output sourced from its internal battery.

The BQ4287 is a fully compatible real-time clock for IBM AT-compatible computers and other applications.

This product is an ESD-class device. It cannot be returned for exchange or credit if the package has been opened. Please read the RTC Module FAQ in its entirety BEFORE ordering or replacing an RTC module.