DS12887 DIP 18 Real Time Clock IC by IJJ – 2pcs Pack, Precise Timing

Description

Product Overview

The DS12887 DIP 18 Real Time Clock IC by IJJ is engineered to deliver precise and stable timekeeping for a wide range of industrial and scientific equipment. Built on a 18‑pin dual‑in‑line package, the chip integrates a crystal oscillator, battery backup, and programmable registers that maintain calendar and clock data even when power is removed. Its low‑power consumption, typically under 500 µA during active operation and less than 1 µA in standby mode, makes it suitable for long‑term deployments where energy efficiency is critical. The device supports a full Gregorian calendar, including leap‑year compensation, and offers alarm functions that can trigger external circuitry at predetermined times. With a temperature operating range from –40 °C to 85 °C, the DS12887 remains reliable in harsh environments, ensuring that data logging, process control, and communication systems retain accurate timestamps without drift.
The compact DIP form factor simplifies board layout and soldering, while the built‑in crystal load capacitance eliminates the need for external components, reducing overall system cost. Additionally, the IC includes a trickle charger circuit that safely recharges an attached backup battery, extending the lifespan of the power source and guaranteeing uninterrupted operation during power outages.
The 2‑piece package supplied by IJJ ensures that designers have immediate redundancy and the flexibility to replace a failed unit without delaying production schedules. Each IC undergoes rigorous testing in accordance with industry standards such as IEC 60730, confirming compliance with timing accuracy and electromagnetic compatibility requirements. The components are sealed in moisture‑resistant epoxy to protect against humidity and corrosion, which is essential for applications in outdoor instrumentation, automotive telematics, and factory automation where exposure to contaminants is common. By providing a complete solution that includes both the clock chip and the necessary supporting documentation, IJJ reduces the engineering effort required to integrate precise timing functions into complex systems.
The DS12887’s pin configuration follows the widely adopted standard for real‑time clock devices, making it straightforward to replace legacy components or to design new boards with minimal redesign effort. Pin 1 provides the battery backup input, while pins 2 through 7 handle address and data lines compatible with common microcontroller interfaces such as I²C and SPI, depending on the selected mode. Pin 8 supplies the crystal oscillator connection, and pins 9 to 12 deliver alarm and interrupt outputs that can be directly linked to system controllers for event‑driven processing. The remaining pins include power supply, ground, and test points that facilitate debugging and verification during development. Detailed timing diagrams and register maps are included in the product datasheet, enabling engineers to quickly configure the clock for custom date formats, alarm intervals, and power‑saving modes.
In demanding applications such as data acquisition systems, network time servers, and medical instrumentation, the DS12887 delivers timing accuracy within ±2 ppm over the full temperature range, meeting the stringent requirements of synchronized operations and regulatory compliance. The integrated oscillator circuit is designed to minimize phase noise, providing clean clock signals that improve the performance of downstream digital logic and communication interfaces. Moreover, the device’s built‑in watchdog timer can monitor system health and trigger a reset if abnormal conditions are detected, adding an extra layer of protection for mission‑critical deployments. The combination of high accuracy, low power draw, and robust feature set makes the DS12887 a preferred choice for engineers seeking a dependable real‑time clock solution.

Usage

The DS12887 is ideally suited for integration into industrial controllers, PLCs, and embedded systems that require reliable date and time stamps. Its compact DIP‑18 footprint allows easy mounting on standard printed circuit boards, while the battery backup capability ensures continuous operation during power interruptions, making it perfect for data loggers that must record events without gaps. Engineers can connect the clock to microcontrollers such as ARM Cortex‑M series or AVR devices using simple I²C or SPI interfaces, enabling seamless synchronization with sensors, actuators, and communication modules.
In environments where temperature fluctuations are common, such as outdoor monitoring stations, automotive telematics units, and factory floor equipment, the DS12887’s wide operating range guarantees accurate timekeeping without the need for additional temperature compensation circuitry. The device’s low power draw also makes it compatible with battery‑powered applications, extending battery life and reducing maintenance intervals. By leveraging the built‑in alarm and interrupt features, system designers can create event‑driven processes that automatically trigger data acquisition or safety shutdown procedures at precise moments.
The DS12887’s straightforward programming model allows developers to set the date, time, and alarm registers with minimal code, accelerating time‑to‑market for products such as smart meters, vending machines, and point‑of‑sale terminals. Its compatibility with industry‑standard development tools and reference designs further simplifies integration, while the robust packaging ensures long‑term reliability even in high‑vibration or dusty conditions. Overall, the clock IC provides a cost‑effective foundation for any application that depends on accurate, continuous time information.
For Internet of Things (IoT) devices that transmit timestamped data to cloud platforms, the DS12887 ensures that each packet carries a reliable time reference, enabling accurate analytics and event correlation across distributed networks. The clock’s ability to retain time information during power loss means that devices can resume operation without requiring network time protocol (NTP) synchronization after every power cycle, conserving bandwidth and reducing latency. When paired with low‑power microcontrollers, the DS12887 contributes to ultra‑low‑power designs suitable for battery‑operated sensors, wearables, and remote telemetry units that must operate for months or years on a single charge.
The DS12887 complies with RoHS and REACH environmental directives, allowing manufacturers to meet global sustainability standards without additional component screening. Its proven track record in high‑volume industrial applications, reflected by its ranking among top clock integrated circuits, demonstrates reliability and performance consistency. Technical support from IJJ includes detailed application notes, reference schematics, and firmware libraries, helping engineers to quickly validate designs and achieve certification for safety and electromagnetic compatibility (EMC) requirements.
Customization options are available for customers requiring specific voltage levels, battery types, or extended temperature ranges. IJJ’s engineering team works closely with OEMs to tailor the DS12887 to unique application constraints, delivering modified versions that meet specialized performance criteria. This collaborative development model accelerates time‑to‑production and ensures that the final product aligns perfectly with the intended operational environment, reinforcing the DS12887’s role as a versatile and adaptable timing solution.
Comprehensive documentation, including timing diagrams, register tables, and layout guidelines, accelerates the design phase, while IJJ’s responsive technical support team offers assistance for any integration challenges, ensuring a smooth path from prototype to production.

Why Choose Us

Choosing IJJ’s DS12887 means selecting a component that has undergone extensive reliability testing, including temperature cycling, humidity exposure, and mechanical shock, to guarantee performance under the most demanding conditions. The rigorous qualification process aligns with ISO 9001 quality management standards, providing confidence that each unit meets precise specifications and delivers consistent timing accuracy throughout its service life. Customers benefit from the brand’s reputation for delivering semiconductor solutions that combine durability with cost‑effectiveness, making the DS12887 a trustworthy element in mission‑critical systems.
The DS12887’s built‑in battery charger and low‑power standby mode reduce the total cost of ownership by extending the life of the backup battery and minimizing energy consumption. This efficiency translates into lower operational expenses for devices that run continuously, such as remote monitoring stations or industrial controllers that cannot afford frequent maintenance. Moreover, the IC’s compatibility with standard development environments and its clear, well‑structured datasheet enable rapid prototyping, shortening time‑to‑market and allowing businesses to respond quickly to evolving market demands.
Beyond the hardware, IJJ offers a comprehensive after‑sales service package that includes firmware updates, design assistance, and a responsive warranty program. Clients can rely on prompt technical assistance to resolve any integration issues, ensuring that their products achieve the highest reliability standards. This commitment to customer success reinforces the value proposition of the DS12887, positioning it as a long‑term partner rather than a one‑time component purchase.
Sustainability is increasingly important for manufacturers, and the DS12887 aligns with eco‑friendly practices through its RoHS compliance and low material usage. The DIP‑18 package minimizes waste compared to larger modules, and the efficient power management reduces overall energy consumption of the end product. IJJ’s global supply chain ensures consistent availability, mitigating risks associated with component shortages and enabling manufacturers to maintain production schedules across multiple regions. By selecting a component that supports both environmental responsibility and reliable sourcing, companies can enhance their corporate social responsibility profile while delivering high‑quality products to customers worldwide.
Looking ahead, IJJ continues to invest in research and development to improve the performance and integration capabilities of its timing products. Customers of the DS12887 benefit from ongoing firmware enhancements, updated reference designs, and access to a community of engineers who share best practices and application notes. This proactive approach ensures that the DS12887 remains compatible with emerging technologies and standards, protecting the longevity of designs that incorporate this clock IC and providing a future‑proof solution for evolving market requirements.
Customization options are available for customers requiring specific voltage levels, battery types, or extended temperature ranges. IJJ’s engineering team works closely with OEMs to tailor the DS12887 to unique application constraints, delivering modified versions that meet specialized performance criteria. This collaborative development model accelerates time‑to‑production and ensures that the final product aligns perfectly with the intended operational environment, reinforcing the DS12887’s role as a versatile and adaptable timing solution.
To further assist developers, IJJ provides online training webinars, detailed application notes, and a dedicated support portal where users can download reference schematics, simulation models, and firmware examples. These resources empower engineers to implement the DS12887 efficiently, reduce development risk, and achieve optimal performance in their final products. The ongoing community forum also facilitates peer‑to‑peer knowledge sharing, further enhancing the development experience.

Key Features

• High‑accuracy ±2 ppm timing ensures reliable timestamps for critical data.
• Low power consumption (<500 µA active, <1 µA standby) extends battery life.
• Integrated battery charger and backup keep clock running during power loss.
• Wide operating temperature range (‑40 °C to 85 °C) suits harsh industrial environments.
• Dedicated IJJ support and warranty provide expert assistance and peace of mind.

FAQ

How do I connect the DS12887 to a microcontroller using I²C?

The DS12887 supports the I²C serial interface, which is a two‑wire bus consisting of SDA (data) and SCL (clock) lines. To connect it to a microcontroller, first power the IC with a 5 V supply and attach a suitable crystal of 32.768 kHz between the X1 and X2 pins, adding the recommended load capacitors as specified in the datasheet. Connect the SDA line to the microcontroller’s I²C data pin and the SCL line to the clock pin, ensuring both lines have pull‑up resistors (typically 4.7 kΩ to 10 kΩ). The battery backup pin should be linked to a coin‑cell battery, and the address pins can be set to the default address or configured for multiple devices on the same bus. Initialize the I²C peripheral in the firmware, then use the provided register map to read and write the time, date, and alarm registers. The datasheet includes example code snippets that simplify this process.

What type of backup battery is recommended for the DS12887?

The DS12887 is designed to work with a small lithium‑ion or lithium‑coin cell battery, typically a 3 V CR2032 or equivalent. The battery is connected to the VBAT pin, which powers the oscillator and retains the clock registers when the main supply is removed. It is important to observe the polarity of the battery and to keep the battery compartment clean to avoid short circuits. The integrated trickle‑charge circuit can safely recharge a rechargeable lithium‑ion cell, but if a non‑rechargeable battery is used, the trickle‑charge feature should be disabled by configuring the appropriate control register. For long‑term deployments, a rechargeable battery offers the advantage of reduced maintenance, while a primary cell provides a simple, low‑cost solution. Always verify the battery voltage remains within the specified range (2.7 V to 3.6 V) to ensure reliable operation.

Can the DS12887 be used in a battery‑powered IoT device?

Yes, the DS12887 is well suited for battery‑powered IoT devices that require accurate timekeeping without continuous power. Its ultra‑low standby current of less than 1 µA means that the clock consumes negligible power when the main processor is asleep, preserving battery life for months or even years. The built‑in battery backup ensures that the real‑time clock continues to run during power interruptions, so the device can resume operation with the correct timestamp immediately after waking. Additionally, the ability to set alarms allows the microcontroller to be awakened at predefined intervals, enabling periodic sensor readings or data transmissions while keeping the processor in a low‑power state most of the time. This combination of low power draw, reliable backup, and flexible wake‑up capabilities makes the DS12887 an ideal choice for remote sensors, wearables, and other IoT applications where power efficiency is paramount.

What is the warranty period and how can I obtain technical support?

The DS12887 is covered by IJJ’s standard one‑year limited warranty, which guarantees that the component will be free from material and workmanship defects under normal operating conditions. If a failure is identified within the warranty period, customers can contact IJJ’s technical support team through the online portal or by phone to arrange a replacement. IJJ also provides comprehensive technical assistance, including detailed application notes, reference schematics, and firmware libraries that are available for download on the product page. For more complex integration challenges, engineers can submit a support ticket and receive personalized guidance from experienced application engineers. The support portal also hosts a knowledge base and community forum where users can share experiences, ask questions, and access updates to the product’s documentation.