DS1390U-3+

Interface:	SPI
Base Part Number:	DS1390
Supplier Device Package:	10-µSOP
Package / Case:	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Current - Timekeeping (Max):	125µA @ 2.7V ~ 3.3V
Voltage - Supply, Battery:	1.3 V ~ 3.7 V
Voltage - Supply:	2.7 V ~ 3.3 V
Series:	--
Date Format:	YY-MM-DD-dd
Time Format:	HH:MM:SS:hh (12/24 hr)
Memory Size:	--
Features:	Alarm, Leap Year, Square Wave Output, Trickle-Charger
Type:	Clock/Calendar
Part Status:	Active
Packaging:	Tube

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Introduction to DS1390U-3+ Real Time Clock

Real time clock (RTC) technology has radically changed the way modern devices are designed and manufactured. The DS1390U-3+ from Maxim Integrated is a low-power, Real Time Clock/Calendar (RTCC), embedded in a small SOIC-8 package. It is a highly accurate, low power RTC used in a wide range of applications in the industrial, medical and consumer markets.

Application Field and Working Principle of DS1390U-3+

The DS1390U-3+ offers excellent power efficiency and timekeeping accuracy in a very compact package, making it an ideal solution for many applications. It can be used in a variety of applications, including: automotive, automotive controllers, temperature and energy monitoring, solar energy tracking, industrial and military systems, medical monitoring, and other high-accuracy and power-efficient designs.The DS1390U-3+ is designed to maximize power and minimize size. The device can be powered by two power supply sources: VBAT and VDD. The VBAT supply voltage is used to maintain the clock and calendar registers, while the VDD supply voltage is used to power the Non-volatile RAM (NVRAM).Using a 32.768kHz crystal, the DS1390U-3+ is able to accurately calculate the current time and date information. The clock and calendar registers are updated every second. The DS1390U-3+ can be used in a variety of time keeping modes including 12- and 24-hour modes, as well as various calendar modes.The DS1390U-3+ has a number of features to keep time accurately and securely. First, the device supports leap year calculations, which ensures that the date is correct on February 29. Second, it has a power-fail detection feature, so it will automatically switch over to VBAT when the VDD supply is disrupted, preventing data loss. Finally, the device has a low current consumption of just 0.4µA in its standby mode, allowing a continuous time keeping operation without significantly impacting power consumption.

Features of DS1390U-3+

The DS1390U-3+ real time clock offers a number of benefits and features to maximize the accuracy and security of time-keeping operations. One of the main benefits is its small size and low power requirements, allowing it to be used in a wide variety of applications.The DS1390U-3+ also features a low jitter of 1µs, making it one of the most accurate and reliable clocks available. Additionally, the DS1390U-3+ offers an extended temperature range of -40°C to +85°C, making it suitable for a wide range of operating and storage temperatures. The DS1390U-3+ supports temperature-compensated crystal oscillator (TCXO) to ensure maximum accuracy in timekeeping operations. It also features an integrated 2µA trickle charger for rechargeable batteries, which further enhances the stability of the device and allows it to be used in a wide range of applications.

Conclusion

The DS1390U-3+ Real Time Clock is an ideal solution for time-keeping operations in a variety of applications. Its small size and low power requirements make it ideal for applications in automotive, medical and industrial markets, while its high accuracy, extended temperature range and TCXO support make it one of the most reliable and secure solutions available. The integrated trickle charger and leap year support further add to the appeal of the DS1390U-3+. It is an ideal option for applications that require reliable timekeeping operation and accuracy.

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