DS12885+

Interface:	Parallel
Base Part Number:	DS12885
Supplier Device Package:	24-PDIP
Package / Case:	24-DIP (0.600", 15.24mm)
Mounting Type:	Through Hole
Operating Temperature:	0°C ~ 70°C
Current - Timekeeping (Max):	15mA @ 4.5V ~ 5.5V
Voltage - Supply, Battery:	2.5 V ~ 4 V
Voltage - Supply:	4.5 V ~ 5.5 V
Series:	--
Date Format:	YY-MM-DD-dd
Time Format:	HH:MM:SS (12/24 hr)
Memory Size:	114B
Features:	Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output
Type:	Clock/Calendar
Part Status:	Active
Packaging:	Tube

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DS12885+ Real Time Clock

The DS12885+ is a real time clock device that is designed to provide highly accurate timekeeping functions, in a low-power form factor. It is used in a wide range of embedded and control applications, such as automotive, industrial, and IT systems, for applications ranging from simple clock and alarm functions to remote data logging and time synchronization.

Overview

The DS12885+ is backed by the industry-leading technology and proven memory and timekeeping capabilities of its parent company, Dallas Semiconductor. It offers a full range of features, including a 24-hour calendar and time of day RAM, programmable interval timer, programmable power management, and a 32kHz resonator controller. It is available with a variety of voltage and package options, including 5V only and 3V, 5V, 12V, and 15V dual-voltage configurations.

Application Fields

The DS12885+ can be used in a wide variety of embedded and control applications, from automotive and industrial systems to IT systems. It can be used for simple clock and alarm functions, remote data logging, time synchronization, and a variety of other timekeeping or control functions. It is ideal for applications that require accurate and reliable timing.

Working Principle

The DS12885+ works by maintaining a fixed oscillator frequency, which is determined by a 32kHz resonator, and comparing it against a Digital Frequency-Offset Oscillator (DFO). This comparison is what allows the device to accurately measure and store time-related data.When the device needs to update its timekeeping functions, it uses the internal oscillator to generate a ticking frequency at a specified rate, which is then compared against the DFO. The difference in frequencies is used to calculate the difference in time, which is then used to update the clock and calendar.The DS12885+ also includes a programmable interval timer, which allows the device to perform regular time and data-logging tasks. The interval timer can be configured to take control of the DS12885+ and perform tasks such as data logging and time synchronization.

Conclusion

The DS12885+ is a highly reliable and accurate real time clock device from Dallas Semiconductor. It offers a wide range of features, including a 24-hour calendar and time of day RAM, programmable interval timer, and 32kHz resonator controller, making it ideal for a wide range of embedded and control applications. It is designed to provide accurate time-keeping functions, in a low-power form factor, making it an ideal choice for a variety of timekeeping or control applications.

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