INDUSTRY COMPONENT

RTC Integrated Circuit

RTC integrated circuit is a specialized microchip that provides accurate timekeeping and calendar functions for electronic systems, maintaining time even during power interruptions.

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Component Specifications

Definition
A Real-Time Clock (RTC) integrated circuit is a low-power semiconductor device designed to track time and date with high precision. It typically includes a quartz crystal oscillator, counter registers for seconds, minutes, hours, days, months, and years, and often features alarm functions, temperature compensation, and battery backup support. RTC ICs communicate with host systems via serial interfaces like I²C or SPI and are essential for applications requiring time-stamping, scheduling, or chronological data logging.
Working Principle
The RTC IC operates by using a 32.768 kHz quartz crystal oscillator as a timebase reference. This frequency is divided down through internal counters to generate one-second pulses. Time and date registers are updated accordingly, with leap-year compensation. During main power loss, a backup battery (typically lithium coin cell) powers the circuit to maintain timekeeping. Communication with the host microcontroller occurs through digital interfaces, allowing reading/writing of time data and configuration settings.
Materials
Silicon semiconductor substrate with CMOS technology, quartz crystal (usually 32.768 kHz), ceramic or plastic package (e.g., SOIC, TSSOP), gold or copper bonding wires, epoxy molding compound.
Technical Parameters
  • Interface I²C/SPI
  • Backup Voltage 1.3V to 5.5V
  • Operating Voltage 1.8V to 5.5V
  • Temperature Range -40°C to +85°C
  • Current Consumption 300nA to 1μA (backup mode)
  • Timekeeping Accuracy ±2ppm to ±20ppm
Standards
ISO 8601, IEC 60747, JEDEC JESD22

Industry Taxonomies & Aliases

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

real-time clock IC RTC chip timekeeping circuit battery-backed clock industrial timer IC CMOS RTC I²C RTC SPI RTC RTC Integrated Circuit RTC Integrated Circuit in Computer, Electronic and Optical Product Manufacturing

Parent Products

This component is used in the following industrial products

Real-Time Clock Module

A hardware component that provides precise timekeeping functionality for synchronization systems.

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Engineering Analysis

Risks & Mitigation
  • Crystal oscillator failure due to mechanical shock
  • Battery leakage contaminating PCB
  • Time drift due to temperature extremes
  • Interface communication errors
  • Electrostatic discharge damage
FMEA Triads
Trigger: Quartz crystal fracture from vibration
Failure: Complete timekeeping failure
Mitigation: Use shock-resistant crystal packages and proper mounting techniques
Trigger: Backup battery depletion
Failure: Time loss during power interruptions
Mitigation: Implement battery voltage monitoring and scheduled replacement protocols
Trigger: EMI/RFI interference on communication lines
Failure: Corrupted time data transmission
Mitigation: Apply proper shielding, filtering, and PCB layout practices for signal integrity

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Timekeeping accuracy typically ±5ppm at 25°C, meeting most industrial timing requirements
Test Method
Time accuracy verification per manufacturer datasheets, backup current measurement, interface protocol validation, temperature cycling tests

Buyer Feedback

★★★★☆ 4.6 / 5.0 (12 reviews)

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

"Testing the RTC Integrated Circuit now; the technical reliability results are within 1% of the laboratory datasheet."

"Impressive build quality. Especially the technical reliability is very stable during long-term operation."

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Frequently Asked Questions

What is the typical backup battery life for an RTC IC?

With a standard 3V lithium coin cell (e.g., CR2032), RTC ICs can maintain timekeeping for 5-10 years in backup mode, depending on circuit design and environmental conditions.

How does temperature affect RTC accuracy?

Temperature variations cause frequency drift in the quartz crystal. Higher-end RTC ICs include temperature compensation circuits that adjust oscillator frequency to maintain accuracy across operating ranges.

Can RTC ICs be used in automotive applications?

Yes, automotive-grade RTC ICs are available with extended temperature ranges (-40°C to +125°C) and enhanced reliability testing per AEC-Q100 standards.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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