RTC DS12887 Replacement Module CR1220 Socket for 486 Pentium DS12B887 BQ3287 For Sale
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This listing is for a high-quality RTC module replacement designed for repair and restoration of vintage computer systems. It serves as a drop-in replacement for original Dallas-style real-time clock modules with integrated, non-replaceable batteries.
Key Specifications
Drop-in replacement for Dallas RTC modules
Compatible with DS1287, DS12887, DS12B887
Also compatible with BQ3287 and OEC12C887 modules
Reported compatibility with Twinhead TH1287
Uses replaceable CR1220 coin cell battery
Designed for 486 and early Pentium motherboards
Includes machine-pin socket for installation
Eliminates issues caused by dead internal RTC batteries
Compatibility Notes
Not confirmed compatible with Digital / Compaq Alphaserver DS10
Compatibility list is based on tested and user-reported systems
Not all systems have been tested
Important Installation Notes
Install in correct orientation — incorrect installation will permanently damage the module
Pins are fragile — handle carefully during installation and removal
Package Includes
1 x RTC Module Replacement 1 x Machine Pin Socket 1 x CR1220 Battery (Not included for international shipments)
Project Attribution
This product is based on the open-source design by Necroware. Full project details are available on GitHub.
Why Buy From Us
Carefully assembled and tested modules
Secure packaging to prevent damage in transit
Fast handling and reliable service
Shipping & Handling
Combined shipping available — add all items to cart before checkout
Items are securely packaged for safe delivery
International buyers: battery not included due to shipping restrictions
