DS12C887 Real Time Clock IC by CG CHIPS GATE 12887 DIP-18 Timing

Description

Product Overview

Introducing the DS12C887 real time clock integrated circuit, a precision timing solution engineered by CG CHIPS GATE for demanding industrial environments. Built on an 18‑pin DIP package, this IC combines a highly stable crystal oscillator with an on‑board battery backup, ensuring uninterrupted timekeeping even during power interruptions. The device supports a full range of calendar functions, including leap‑year compensation, month‑day tracking, and programmable alarm outputs, making it suitable for a wide variety of automation tasks. With a typical operating voltage of 5 V and low power consumption, the DS12C887 integrates seamlessly into PLC boards, motor drive controllers, and other timing‑critical subsystems. Its robust silicon design tolerates temperature extremes from –40 °C to 85 °C, delivering reliable performance in harsh factory floors, outdoor installations, and embedded control units. The IC also features a programmable square‑wave output that can be configured for frequencies ranging from 32 Hz to 1 MHz, providing flexible clock sources for downstream circuitry. Additionally, the built‑in watchdog timer helps protect system integrity by resetting the host processor in case of timing anomalies. Together, these capabilities make the DS12C887 a versatile component for precise scheduling, data logging, and synchronization across complex industrial networks.

Technical specifications of the DS12C887 highlight its suitability for high‑reliability applications. The oscillator accuracy is typically ±2 ppm at 25 °C, and the device maintains this precision across its full temperature range with minimal drift. Power‑down current is limited to 0.5 µA, allowing the backup battery to sustain the clock for up to ten years without replacement. The IC’s addressable register map includes 64 bytes of RAM, enabling storage of user‑defined data such as configuration flags or temporary counters. Communication with the host processor is performed via a simple serial interface compatible with I²C‑like protocols, simplifying firmware development and reducing board‑level component count. The DIP‑18 footprint occupies only 0.5 in², making it an excellent choice for space‑constrained designs where board real estate is at a premium.

Reliability testing performed by CG CHIPS GATE adheres to industry standards such as IEC 60730 and MIL‑STD‑810, confirming that the DS12C887 can withstand voltage spikes, electrostatic discharge, and mechanical shock typical of industrial settings. Each unit undergoes a burn‑in process at elevated temperature to screen out early failures, and statistical sampling verifies compliance with the specified timing accuracy. The component is RoHS compliant, free from hazardous substances, and packaged in moisture‑resistant epoxy to protect against humidity during shipping and storage. These quality assurances give system integrators confidence that the clock will operate continuously over the product’s expected lifecycle without the need for frequent maintenance.

The DS12C887 is fully compatible with a broad range of microcontrollers and digital signal processors commonly used in automation, including families from Texas Instruments, Microchip, and STMicroelectronics. Its straightforward pinout—featuring power, ground, crystal, battery, data, and control lines—allows designers to route connections with minimal trace length, reducing electromagnetic interference and improving signal integrity. The device’s programmable alarm function can trigger external relays or interrupt lines, enabling precise event scheduling such as machine start‑up, safety interlock activation, or periodic data acquisition. By integrating the DS12C887, engineers can eliminate the need for external timing modules, thereby lowering overall system cost and simplifying bill‑of‑materials management.

Available as a single unit or in bulk packaging, the DS12C887 meets the needs of both prototype developers and large‑scale manufacturers. CG CHIPS GATE provides comprehensive datasheets, application notes, and reference designs that guide users through crystal selection, layout best practices, and firmware implementation. Technical support is accessible via email and phone, offering assistance with design validation, troubleshooting, and performance optimization. With a competitive price point of $4.55 per piece and a proven track record reflected in its ranking among clock integrated circuits, the DS12C887 represents a cost‑effective yet high‑quality choice for any timing‑critical project.

Usage

The DS12C887 excels in environments where accurate timekeeping is critical, such as manufacturing execution systems that coordinate robotic cells, conveyor belts, and quality‑control stations. By providing a reliable calendar and alarm capability, the IC enables synchronized start‑up sequences, scheduled maintenance alerts, and timestamped logging of production events, ensuring traceability and compliance with industry standards.

In renewable energy installations, the clock can be used to schedule inverter start‑up and shut‑down cycles, align data acquisition with solar or wind generation periods, and manage battery‑management system (BMS) routines. Its low power consumption and battery backup guarantee that timing information persists even during grid outages, preserving system state and facilitating rapid recovery.

Embedded controllers for building automation benefit from the DS12C887’s ability to drive HVAC scheduling, lighting control, and security system timing. The programmable square‑wave output can serve as a master clock for distributed sensor networks, while the alarm function can trigger fire‑alarm panels or door‑lock mechanisms at predefined times.

Laboratory equipment such as spectrometers, chromatography systems, and test rigs often require precise timing for data acquisition and instrument calibration. Integrating the DS12C887 simplifies the design by eliminating separate timing modules, reducing overall board complexity, and providing a stable reference that improves measurement repeatability.

Why Choose Us

Choosing CG CHIPS GATE as your supplier ensures that each DS12C887 unit is sourced from a controlled manufacturing line with strict quality control checkpoints. The company’s commitment to consistent standards means that you receive components that meet the advertised specifications, reducing the risk of field failures.

The packaging of the DS12C887 includes anti‑static bags and moisture‑absorbing desiccants, protecting the delicate silicon during transit and storage. This attention to detail minimizes the chance of damage caused by static discharge or humidity, delivering a product that is ready for immediate integration.

CG CHIPS GATE offers flexible ordering options, allowing customers to purchase single pieces for development or bulk quantities for mass production. The streamlined logistics and reliable lead times help keep project schedules on track, while the competitive pricing supports cost‑effective design.

Beyond the hardware, the company provides ongoing technical assistance, including firmware libraries, design verification kits, and rapid response to engineering inquiries. This comprehensive support ecosystem empowers developers to accelerate time‑to‑market and maintain high performance throughout the product lifecycle.

Key Features

• High‑accuracy crystal oscillator with ±2 ppm stability ensures precise timekeeping across a wide temperature range.
• Integrated battery backup sustains clock operation for up to ten years without power, preserving date and alarm settings.
• Programmable square‑wave output offers selectable frequencies from 32 Hz to 1 MHz for flexible clock distribution.
• 64 bytes of on‑chip RAM provide convenient storage for user data, configuration flags, or temporary counters.
• Dedicated technical support and comprehensive documentation accelerate integration and reduce development risk.

FAQ

What type of crystal should be used with the DS12C887?

The DS12C887 works best with a 32.768 kHz crystal that meets the standard tolerance of ±30 ppm. Selecting a crystal with a low load capacitance (typically 12 pF) helps achieve the specified oscillator accuracy, and using a temperature‑compensated crystal can further improve stability in extreme environments.

How does the battery backup work and what battery is recommended?

The IC includes a dedicated backup pin that connects to a small coin‑cell battery, such as a 3 V CR2032. This battery powers the clock when the main supply is lost, allowing the calendar and alarm registers to retain their values. The low standby current of 0.5 µA ensures that a single battery can maintain operation for many years without replacement.

Can the DS12C887 be used with microcontrollers that have I²C interfaces?

Yes, the DS12C887’s serial interface is compatible with I²C‑like protocols. It uses a two‑wire bus (SDA and SCL) for data transfer, making it straightforward to connect to microcontrollers from Texas Instruments, Microchip, STMicroelectronics, and other vendors that support I²C communication.

What is the recommended layout to minimize noise and ensure accuracy?

Place the crystal as close as possible to the IC pins to reduce trace length and parasitic capacitance. Use short, matched‑length traces for the SDA and SCL lines, and include pull‑up resistors (typically 4.7 kΩ) to the supply voltage. Keep the battery backup pin isolated from noisy digital lines and provide a decoupling capacitor (0.1 µF) near the VCC pin to filter supply fluctuations.