![]() *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. – Time–of–day alarm once/second to once/dayĭallas Semiconductor was an American company that was founded in 1984 and was a supplier of mixed-signal and digital semiconductors. ■ Three interrupts are separately software–maskable and testable ■ Bus–compatible interrupt signals ( IRQ ) – 14 bytes of clock and control registers ■ Interfaced with software as 128 RAM locations ■ Selectable between Motorola and Intel bus timing ■ 12– or 24–hour clock with AM and PM in 12–hour mode ■ Binary or BCD representation of time, calendar, and alarm ■ Counts seconds, minutes, hours, days, day of the week, date, month, and year with leap year compensation valid up to 2100 ■ Self–contained subsystem includes lithium, quartz, and support circuitry ■ Totally nonvolatile with over 10 years of operation in the absence of power ■ Pin-compatible with the MC146818B and DS1287 ■ Drop–in replacement for IBM AT computer clock/calendar As such, the DS12887 is a complete subsystem replacing 16 components in a typical application. A lithium energy source, quartz crystal, and write– protection circuitry are contained within a 24–pin dual in-line package. Access to this additional RAM space is determined by the logic level presented on AD6 during the address portion of an access cycle. Although Dallas and others made newer model RTC modules that can be used as substitutes for obsolete RTC. The DS12887 is identical in form, fit, and function to the DS1287, and has an additional 64 bytes of general purpose RAM. RTC Module Replacement Dallas DS1287 DS12887.jpg. ![]() Manufacturer : Maxim Integrated Packaging : Tube Series : - Part Status : Active Type : Clock/Calendar Features : Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output Memory Size : 114B Time Format : HH:MM:SS (12/24 hr) Date Format : YY-MM-DD-dd Interface : Parallel Voltage - Supply : 4.5 V ~ 5.5 V Voltage - Supply, Battery : 2.5 V ~ 4 V Current - Timekeeping (Max) : 15mA 4.5V ~ 5.5V Operating Temperature : 0¡ãC ~ 70¡ãC Mounting Type : Through Hole Package / Case : 24-DIP Module (0.600", 15.The DS12887 Real Time Clock plus RAM is designed to be a direct replacement for the DS1287. Manufacturer : Maxim Integrated Packaging : Tube Series : - Part Status : Active Type : Clock/Calendar Features : Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output Memory Size : 114B Time Format : HH:MM:SS (12/24 hr) Date Format : YY-MM-DD-dd Interface : Parallel Voltage - Supply : 4.5 V ~ 5.5 V Voltage - Supply, Battery : 2.5 V ~ 4 V Current - Timekeeping (Max) : 15mA 4.5V ~ 5.5V Operating Temperature : 0¡ãC ~ 70¡ãC Mounting Type : Through Hole Package / Case : 24-DIP Module (0.600", 15.24mm) Supplier Device Package : 24-EDIP DC:2021+ Manufacturer : Maxim Integrated Packaging : Tube Series : - Part Status : Obsolete Type : Clock/Calendar Features : Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output Memory Size : 114B Time Format : HH:MM:SS (12/24 hr) Date Format : YY-MM-DD-dd Interface : Parallel Voltage - Supply : 4.5 V ~ 5.5 V Voltage - Supply, Battery : 2.5 V ~ 4 V Current - Timekeeping (Max) : 15mA 4.5V ~ 5.5V Operating Temperature : 0¡ãC ~ 70¡ãC Mounting Type : Through Hole Package / Case : 24-DIP Module (0.600", 15.24mm) Supplier Device Package : 24-EDIP DC:2021+
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