The GW-1386-1 is a complete replacement for the Dallas DS1386 RAMified Watchdog Timekeeper. This replacement module is designed using modern low-power components and a newer controller than used in the original DS1386, but is 100% electrically and software compatible with the originals.

The DS1386 was available in two variants: 8K and 32K. This listing is for the 8K replacement, though it is reconfigurable with 0603 zero ohm jumpers.

The GW-1386-1 consists of a small circuit board, low-power SRAM, Dallas/Maxim NVRAM controller, RTC crystal, and CR1225 battery. The circuit board uses Batten & Allen leadframe pins, making it compatible with even single-wipe sockets, while also keeping module height to a minimum. The GW-1386-1 is actually slightly shorter than the original Dallas modules, despite using a coin cell holder.

The GW-1386-1 is maintainable: the CR1225 lithium cell (included) can be removed from the cell holder and replaced with the system powered up, preventing loss of NVRAM contents. All GW-1386-1 modules are built with 100% new components sourced from reputable distributors, and are fully tested for NVRAM, RTC, and watchdog functionality. Like all of our products, the GW-1386-1 is designed and made in the USA.

These modules are tested in a real SGI Indy and are 100% compatible