![]() ![]() *This information is for general informational purposes only, we will not be liable for any loss or damage caused by the above information. The Dallas Semiconductor brand is no longer in use, but its products and technology continue to be a part of Maxim's portfolio. In 2002, Dallas Semiconductor was acquired by Maxim Integrated, a multinational semiconductor company, and became a subsidiary of Maxim. The company was headquartered in Dallas, Texas, and was known for its innovative products and technology in the field of real-time clocks, temperature sensors, and other integrated circuits. Abstract: DS12C887A Real-Time Clock Dallas DS12C887A DS12C887A RTC DS12C887 DS1285 DS1287 DS12885 DS12887 DS12C887 Text: / Dallas Direct at 1-88, or visit Maxims website at 1 DS12885/ DS12887, Dallas Real-Time Clocks for more detailed information. ![]() ■ Three interrupts are separately softwareĭallas Semiconductor was an American company that was founded in 1984 and was a supplier of mixed-signal and digital semiconductors. – 15 bytes of clock and control registers ■ Selectable between Motorola and Intel bus The week, date, month, and year with leap ■ Counts seconds, minutes, hours, days, day of ■ Self-contained subsystem includes lithium, ■ Totally nonvolatile with over 10 years of ■ Drop-in replacement for IBM AT computer A lithium energy source, quartz crystal, and write-protection circuitry are contained within a 24–pin dual in-line package. A century byte was added to memory location 50, 32h, as called out by the PC AT specification. 50PC Dallas Semiconductor DS12887 Real Time Clock IC Availability: Contact us Shipping: FREE Fedex Ground See details Warranty: 1 year replacement Warranty. English Deutsch Français Español Português Italiano Român Nederlands Latina Dansk Svenska Norsk Magyar Bahasa Indonesia Türkçe Suomi Latvian Lithuanian esk. The device is accessed through a multiplexed byte-wide interface, which supports both Intel and Motorola modes.The DS12C887 Real Time Clock plus RAM is designed as a direct upgrade replacement for the DS12887 in existing IBM compatible personal computers to add hardware year 2000 compliance. Dallas Semiconductor DS12887 Real-Time Clock and CMOS Memory. A lithium coin-cell battery can be connected to the VBAT input pin on the DS12885 to maintain time and date operation when primary power is absent. If a primary power failure is detected, the device automatically switches to a backup supply. A precision temperature-compensated circuit monitors the status of VCC. The devices also operate in either 24-hour or 12-hour format with an AM/PM indicator. Real Time Clock Real-Time Clocks Datasheet: DS12887+ Datasheet (PDF) ECAD Model: Download the free Library Loader to convert this file for your ECAD Tool. For all devices, the date at the end of the month is automatically adjusted for months with fewer than 31 days, including correction for leap years. It would be pointless to buy one that’s ten or fifteen years old with a dead battery. Ok so I need a new DS12887 and have seen many on EBay but have to wonder how old they are and what life may be left in them. The DS12C887 adds a century byte at address 32h. Discovered that the Dallas DS12887 real time clock had died and that on this system (486DX100) the cmos setup lives in the clock chip. The DS12887 integrates a quartz crystal and lithium energy source into a 24-pin encapsulated DIP package. The devices provide a real-time clock/calendar, one time-of-day alarm, three maskable interrupts with a common interrupt output, a programmable square wave, and 114 bytes of battery backed static RAM (113 bytes in the DS12C887 and DS12C887A). The DS12885, DS12887, and DS12C887 real-time clocks (RTCs) are designed to be direct replacements for the DS1285 and DS1287. ![]()
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