DS1501YZN+T&R

Interface:	Parallel
Base Part Number:	DS1501
Supplier Device Package:	28-SOIC
Package / Case:	28-SOIC (0.295", 7.50mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Current - Timekeeping (Max):	5mA @ 4.5V ~ 5.5V
Voltage - Supply, Battery:	2.5 V ~ 3.7 V
Voltage - Supply:	4.5 V ~ 5.5 V
Series:	--
Date Format:	YY-MM-DD-dd
Time Format:	HH:MM:SS (24 hr)
Memory Size:	256B
Features:	Alarm, Leap Year, NVSRAM, Square Wave Output, Watchdog Timer, Y2K
Type:	Clock/Calendar
Part Status:	Active
Packaging:	Tape & Reel (TR)

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DS1501YZN+T&R Real Time Clocks

Real Time Clocks (RTCs) are essential components in any electronic system that requires accurate timekeeping, such as in computer systems, embedded systems and microcontrollers. The DS1501YZN+T&R is a popular RTC made by Maxim Integrated and is used in many different applications. This article will explain the features, applications and working principle of the DS1501YZN+T&R.

Features

The DS1501YZN+T&R includes both the clock and a temperature-compensated crystal oscillator (TCXO) in one package. It has a 3.2V to 5V operating voltage range and a current consumption of only 13.2mA maximum. It is also extremely accurate, with a clock accuracy of ±0.0045ppm at 0°C to 50°C, and a temperature accuracy (±3σ) of ±2.0°C over the same temperature range. In addition, it has several advanced features, such as an integrated watchdog timer, multiple output formats and power savings modes. It also has an integrated phase-locked loop (PLL) which allows it to synchronize with an external clock signal and compensate for temperature changes. Furthermore, it comes in two versions: one with a built-in battery backup, and one without.

Application Fields

The DS1501YZN+T&R is well suited for a wide range of applications, including clock synchronization for networked systems, embedded system timekeeping, data logging and grid computing. It is also commonly used in smart home and Internet of Things (IoT) applications due to its low current consumption, accuracy and features. Other applications include automotive and aerospace systems, medical equipment, metering systems, wearables and consumer electronics. The DS1501YZN+T&R has also been used in military applications, such as missile guidance systems and satellite communication systems.

Working Principle

The DS1501YZN+T&R uses an integrated PLL to synchronize with a reference clock signal, which is typically provided by an external oscillator. This signal is then buffered and filtered by the PLL, and a clock signal is output from the RTC. The RTC also contains a temperature-compensated crystal oscillator (TCXO). This TCXO ensures timekeeping accuracy by compensating for temperature changes and other external factors such as power supply voltage variations. Finally, the integrated watchdog timer monitors the system to ensure that it is functioning correctly. If it detects a problem, it will issue an alarm signal.

Conclusion

The DS1501YZN+T&R is a popular, low power and accurate real time clock that is suitable for a wide range of applications. It has a 3.2V to 5V operating voltage range, a current consumption of 13.2mA, a clock accuracy of ±0.0045ppm and a temperature accuracy of ±2.0°C. It also includes an integrated PLL and watchdog timer for enhanced accuracy and reliability. Overall, the DS1501YZN+T&R is a reliable and accurate clock solution for any system requiring accurate timekeeping.

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