DS1337 I2C Serial Real-Time Clock

DS1337U+ – I²C Serial Real-Time Clock with Alarm & Low Power – Analog Devices

The DS1337U+ from Analog Devices is a high-precision I²C real-time clock (RTC) IC designed for accurate timekeeping in power-sensitive applications. This surface-mount component offers ultra-low current consumption, wide voltage operation, and integrated calendar features, ensuring reliable timing control while maximizing battery life. PCX supplies this industrial-grade RTC with guaranteed stock availability and rapid shipping.

Key Features

• Type: Clock/Calendar with I²C Serial Interface
• Voltage Range: 1.8V to 5.5V operation
• Ultra-Low Power: 0.6µA timekeeping current (max @ 1.3V-1.8V)
• Time/Date Format: 12/24-hour HH:MM:SS & YY-MM-DD-dd
• Critical Features: Programmable alarm, leap year compensation, square wave output
• Robust Design: -40°C to +85°C operating temperature

Technical Details

Housed in a compact 8-uMAX/uSOP package (3.00mm width), the DS1337U+ provides full clock/calendar functionality with seconds, minutes, hours, day, date, month, and year tracking. Its 2-wire I²C serial interface enables simple microcontroller integration. The device includes automatic leap year correction up to 2100 and features a programmable square-wave output signal. With timekeeping accuracy maintained down to 1.3V, it excels in backup power scenarios.

Typical Applications

• Battery-backed IoT sensors and wearables
• Industrial automation controllers
• Embedded systems requiring event timestamping
• Medical monitoring equipment
• POS terminals and metering devices

About Analog Devices

Analog Devices Inc. (ADI) is a global leader in high-performance analog and mixed-signal technologies. Following its acquisition of Maxim Integrated, ADI strengthened its portfolio in precision timing solutions, power management, and sensor interfaces. The company’s components are renowned for innovation and reliability across mission-critical industries.

With decades of semiconductor expertise, ADI maintains rigorous quality standards and extensive environmental testing. Their RTC products like the DS1337U+ series deliver industry-leading accuracy and power efficiency, backed by comprehensive technical documentation and design support – making them preferred solutions for engineering teams worldwide.

About Real-Time Clocks (RTCs)

Real-Time Clocks are dedicated integrated circuits that track absolute time and calendar data independently from a system’s main processor. They serve as persistent timing references during main power loss, using minimal energy from backup batteries or supercapacitors. This autonomous operation is critical for timestamping events, scheduling tasks, and maintaining accurate time in disconnected applications.

Modern RTCs like the DS1337U+ integrate advanced features such as temperature compensation, alarm interrupts, and serial interfaces while achieving microamp-level power consumption. These components form the chronological backbone in embedded systems across automotive, industrial, medical, and consumer electronics where precise timekeeping directly impacts functionality and regulatory compliance.

Packaging

PCX supplies the DS1337U+ in standard manufacturer tube packaging, ensuring ESD protection and handling integrity. Custom packaging options may be available – contact our support team for specific requirements.

FAQs

Question: How does the DS1337U+ maintain time during power failures?
Answer: It switches seamlessly to a backup supply (1.3V minimum), consuming only 0.6µA to preserve timing integrity.

Question: Can the alarm function trigger a microcontroller wake-up?
Answer: Yes, the programmable alarm asserts an interrupt pin to wake sleeping processors.

Question: Does this RTC require external crystals?
Answer: Yes, it needs a standard 32.768kHz tuning fork crystal (not included).

Question: Is the date format configurable?
Answer: The YY-MM-DD-dd format is fixed in hardware but can be reinterpreted in software.

Question: What’s the maximum I²C bus speed supported?
Answer: It operates at standard-mode (100kHz) and fast-mode (400kHz) I²C frequencies.

Question: Does PCX provide design resources?
Answer: Yes! Access the DS1337U+ Datasheet on our site, plus schematic review support.

Order Today for Fast Delivery!

Ensure your project stays on schedule – purchase genuine Analog Devices DS1337U+ RTCs from PCX with same-day shipping and dedicated technical support. Verify stock availability and secure your components now!

Note: Product images are representational. Refer to datasheet for exact specifications.