INDUSTRY COMPONENT

CMOS Integrated Circuit

CMOS integrated circuit for real-time clock applications providing low-power timekeeping functionality in electronic systems.

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Component Specifications

Definition
A CMOS (Complementary Metal-Oxide-Semiconductor) integrated circuit specifically designed for Real-Time Clock (RTC) functionality, utilizing CMOS technology to achieve extremely low power consumption while maintaining accurate timekeeping through an integrated oscillator and counter system. This component typically includes memory registers for storing time/date data and operates on a backup power source when main power is disconnected.
Working Principle
Utilizes CMOS transistor pairs to create logic gates with minimal static power consumption. An integrated quartz crystal oscillator generates precise timing signals (typically 32.768 kHz) that are divided down by counter circuits to track seconds, minutes, hours, and date. Time data is stored in volatile or non-volatile memory registers accessible through serial communication interfaces.
Materials
Silicon substrate with CMOS transistor structures, aluminum or copper interconnects, silicon dioxide insulation layers, quartz crystal resonator, ceramic or plastic packaging materials.
Technical Parameters
  • Memory 32-256 bytes RAM
  • Interface I2C, SPI, or 3-wire serial
  • Time Accuracy ±2ppm to ±20ppm
  • Backup Current 300nA typical
  • Operating Voltage 1.8V to 5.5V
  • Temperature Range -40°C to +85°C
  • Oscillator Frequency 32.768 kHz
Standards
ISO 9001, IEC 60747, JEDEC JESD22

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for CMOS Integrated Circuit.

CMOS RTC real-time clock IC low-power timekeeping battery-backed clock semiconductor timing electronic timekeeping CMOS Integrated Circuit CMOS Integrated Circuit in Computer, Electronic and Optical Product Manufacturing

Parent Products

This component is used in the following industrial products

Real-Time Clock (RTC)

An electronic component that keeps track of the current time and date independently of the main system power.

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Engineering Analysis

Risks & Mitigation
  • Crystal oscillator failure
  • Battery leakage
  • Data corruption during power transitions
  • ESD damage
  • Clock drift over temperature variations
FMEA Triads
Trigger: Crystal oscillator contamination or damage
Failure: Loss of timekeeping accuracy or complete clock stoppage
Mitigation: Implement hermetic sealing, use high-quality quartz crystals, add oscillator monitoring circuits
Trigger: Backup battery depletion or leakage
Failure: Loss of time data during power outages
Mitigation: Use lithium batteries with extended lifespan, implement battery monitoring, provide alternative power sources

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Time accuracy within ±5 minutes per year at 25°C
Test Method
JEDEC JESD22-A114 for ESD, MIL-STD-883 for environmental stress, ISO 16750 for automotive applications

Buyer Feedback

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"Reliable performance in harsh Computer, Electronic and Optical Product Manufacturing environments. No issues with the CMOS Integrated Circuit so far."

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Frequently Asked Questions

What is the main advantage of CMOS technology in RTC circuits?

CMOS technology enables extremely low power consumption, allowing RTC circuits to operate for years on small backup batteries while maintaining accurate timekeeping.

How does the RTC maintain time during power outages?

The RTC switches to a backup power source (typically a coin cell battery or supercapacitor) when main power is lost, preserving time data and continuing oscillator operation.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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