Rtc W/ Nvsram, 904B, Hh:Mm:Ss, Edip-24; Date Format:Day; Date; Month; Year; Clock Format:Hh:Mm:Ss; Clock Ic Type:Alarm Rtc; Supply Voltage Min:4.5V; Supply Voltage Max:5.5V; Clock Ic Case Style:-; No. Of Pins:24Pins; Product Range:- Rohs Compliant: Yes |Maxim Integrated/analog Devices DS12C887+

DS12C887+ – Real-Time Clock with NVSRAM – Analog Devices

The DS12C887+ from Analog Devices is a high-precision real-time clock (RTC) module with integrated non-volatile SRAM (NVSRAM), designed to provide reliable timekeeping and data retention in embedded systems. This 24-pin DIP IC ensures continuous operation during power loss and simplifies time/date management with advanced calendar features. PCX supplies this industry-standard component with guaranteed authenticity and same-day shipping.

Key Features

• Integrated NVSRAM: 113-byte non-volatile memory retains critical data during power interruptions
• Precision Timekeeping: Maintains clock accuracy with automatic leap-year and daylight savings adjustments
• Dual Voltage Support: 4.5V–5.5V main supply with 2.5V–4V battery backup input
• Low Power Consumption: Max 15mA timekeeping current at 5V operation
• Versatile Output: Configurable square wave generator for system timing
• Industrial Temperature Range: 0°C to 70°C operating capability

Technical Specifications

This through-hole RTC module features a parallel interface with intelligent calendar functions in a 24-pin EDIP package. The clock maintains time in 12/24-hour HH:MM:SS format and date in YY-MM-DD-dd (day-of-week) structure. Battery-switching circuitry ensures seamless transition to backup power, while the NVSRAM prevents data loss during outages. The device includes programmable alarms and oscillator fail detection.

Typical Applications

• Industrial automation controllers
• Medical diagnostic equipment
• Point-of-sale (POS) systems
• Embedded computing platforms
• Building management systems

About Analog Devices

Analog Devices Inc. (ADI) is a global leader in high-performance analog and mixed-signal technologies, with a 50+ year heritage of innovation. Their acquisition of Maxim Integrated further strengthened their portfolio in precision timing solutions, combining cutting-edge semiconductor design with rigorous quality standards.

ADI components are renowned for exceptional reliability in mission-critical applications across automotive, industrial, and communications sectors. The company maintains ISO-certified manufacturing processes and provides comprehensive technical documentation for all products, ensuring seamless integration into complex electronic systems.

About Real-Time Clocks

Real-Time Clocks (RTCs) are essential integrated circuits that track absolute time independent of host processors. They maintain accurate time/date information through battery backup during main power loss, serving as the chronological backbone for event logging, scheduled operations, and time-sensitive processes in electronic devices.

Modern RTCs like the DS12C887+ incorporate non-volatile memory to preserve configuration settings and critical data. Advanced features such as temperature compensation, programmable alarms, and automatic calendar adjustments make them indispensable for applications requiring precise timekeeping without CPU intervention, from server motherboards to industrial control panels.

Packaging Options

Available in protective Tube packaging for automated assembly processes. Contact PCX for reel packaging alternatives.

Frequently Asked Questions

Q: Does the NVSRAM require external batteries?
A: Yes, the onboard NVSRAM requires a 2.5V–4V external battery connected to the VBAT pin for data retention during main power loss.

Q: Can this RTC operate in extended temperature environments?
A: The DS12C887+ supports 0°C to 70°C operation. For wider ranges (-40°C to 85°C), consider the DS12C887A variant.

Q: How is daylight saving time handled?
A: The device automatically adjusts for daylight savings when enabled via configuration registers.

Q: What’s the typical battery lifespan in backup mode?
A: With a standard 3V lithium coin cell, backup operation typically exceeds 10 years due to nanoampere-level sleep current.

Q: Is the square wave output configurable?
A: Yes, the output frequency is programmable to 15 different rates from 32.768kHz down to 1Hz.

Q: Does PCX provide technical documentation?
A: Absolutely. Access the full DS12C887+ datasheet on our product page for design guidance.

Product images are representational. Refer to datasheets for exact dimensions.

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