DS12C887 IC Real Time Clock RTC
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Real-Time Clock: The IC includes a real-time clock that keeps track of seconds, minutes, hours, days, months, and years.
Battery Backup: It often comes with a built-in battery backup feature to ensure that the clock continues to run even when the main power is disconnected. This is crucial for maintaining timekeeping accuracy during power outages.
NV SRAM (Non-Volatile Static RAM): The DS12C887 typically integrates Non-Volatile RAM, which allows storage of important information like time and date even when the power is off.
Alarm Functionality: Some versions of the DS12C887 may include alarm functions, allowing the IC to trigger an alarm at a specified time.
Interrupt Output: The IC may provide an interrupt output to signal the microcontroller or system when a certain time event occurs.
I2C Interface: The DS12C887 usually communicates using the I2C (Inter-Integrated Circuit) serial interface, making it compatible with a wide range of microcontrollers.
Temperature Compensation: Some versions may include temperature compensation features to improve timekeeping accuracy across varying temperature conditions.
Crystal Oscillator: The DS12C887 typically relies on an external crystal oscillator for accurate timekeeping.
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Specification
Description
The DS12C887 is indeed a Real-Time Clock (RTC) IC, manufactured by Maxim Integrated.Here are some key Features
Functionality: The DS12C887 is designed to provide real-time clock and calendar functions, making it suitable for timekeeping applications.Real-Time Clock: The IC includes a real-time clock that keeps track of seconds, minutes, hours, days, months, and years.
Battery Backup: It often comes with a built-in battery backup feature to ensure that the clock continues to run even when the main power is disconnected. This is crucial for maintaining timekeeping accuracy during power outages.
NV SRAM (Non-Volatile Static RAM): The DS12C887 typically integrates Non-Volatile RAM, which allows storage of important information like time and date even when the power is off.
Alarm Functionality: Some versions of the DS12C887 may include alarm functions, allowing the IC to trigger an alarm at a specified time.
Interrupt Output: The IC may provide an interrupt output to signal the microcontroller or system when a certain time event occurs.
I2C Interface: The DS12C887 usually communicates using the I2C (Inter-Integrated Circuit) serial interface, making it compatible with a wide range of microcontrollers.
Temperature Compensation: Some versions may include temperature compensation features to improve timekeeping accuracy across varying temperature conditions.
Crystal Oscillator: The DS12C887 typically relies on an external crystal oscillator for accurate timekeeping.
Usage:
RTCs like the DS12C887 are commonly used in electronic devices where accurate timekeeping is required, such as in embedded systems, industrial automation, and consumer electronics.Features
- Drop-in replacement for IBM AT computer clock/calendar
- Pin compatible with the MC146818B and DS1287
- Nonvolatile with over 10 years of operation in the absence of power
- The self-contained subsystem includes lithium, quartz, and support circuitry.
- Counts seconds, minutes, hours, days, days of the week, dates, months, and years with leap year compensation valid up to 2100
- Binary or BCD representation of time, calendar, and alarm
- 12– or 24–hour clock with AM and PM in 12–hour mode
- Daylight Savings Time option
- Selectable between Motorola and Intel bus timing
- Multiplex bus for pin efficiency
- Interfaced with software as 128 RAM locations
– 15 bytes of clock and control registers
– 113 bytes of general purpose RAM
- Programmable square wave output signal
- Bus–Bus-compatible interrupt signals (IRQ)
- Three interrupts are separately software maskable and testable
– Time–of–day alarm once/second to once/day
– Periodic rates from 122 ms to 500 ms
– End of clock update cycle
- Century register
Physical Attributes
- Length * Width * Height (mm):
- Weight (gm) : 2
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