IEC 60679-1:2017

Overview

IEC 60679-1:2017 is an international standard developed by the International Electrotechnical Commission (IEC) that specifies general requirements for piezoelectric, dielectric, and electrostatic oscillators of assessed quality. This standard covers a wide variety of oscillators, including Dielectric Resonator Oscillators (DRO) and devices using Film Bulk Acoustic Resonator (FBAR) technology. The scope extends to approval procedures based on either capability or qualification, ensuring that these oscillators meet internationally recognized quality and performance benchmarks.

This fourth edition includes updated definitions and new terms covering emerging technologies, such as oscillators using Surface Acoustic Wave (SAW), Micro-Electro-Mechanical Systems (MEMS) resonators, Digital Interfaced Crystal Oscillators (DIXO), and Spread Spectrum Crystal Oscillators (SSXO). The measurement methods from the earlier edition have been removed and are now referenced in the IEC 62884 series.

Key Topics

IEC 60679-1:2017 addresses several critical aspects for oscillator devices:

• General Requirements: Lays out the essential quality, marking, and rating criteria for oscillators, including terminology, graphical symbols, and preferred unit values.
• Definitions and Classifications: Provides precise definitions for oscillator types (e.g., SPXO, VCXO, TCXO, OCXO, SAW, MEMS-based).
• Quality Assessment Procedures: Outlines detailed processes for both capability and qualification approval, specifying documentation, test procedures, and inspection routines.
• Marking and Packaging: Requirements for physical marking and the correct packaging of oscillator devices to maintain quality during handling and transport.
• Performance Attributes: Addresses parameters such as frequency stability, frequency tolerance, operating and storage temperature ranges, and frequency adjustment range.
• Special Oscillator Types: Introduction and standardization of digital interfaced (DIXO) and spread spectrum (SSXO) crystal oscillators, improving compatibility with modern digital systems.
• Annexes: Provide normative details on load circuits for various logic families, electrostatic discharge sensitivity, latch-up testing, and digital oscillator functionality.

Applications

Oscillators conforming to IEC 60679-1:2017 are vital components across the electronics industry. Their applications include, but are not limited to:

• Telecommunications: Timing and frequency references in wireless and wired telecom networks.
• Consumer Electronics: Stable clock sources in smartphones, computers, and IoT devices.
• Industrial Automation: Synchronized operations in automation controllers and measurement systems.
• Aerospace and Defense: Rugged oscillators needed for harsh environments and high-reliability systems.
• Automotive Electronics: Sensor and controller timing for advanced driver-assistance systems (ADAS) and infotainment systems.

By following this standard, manufacturers and system integrators can ensure consistent oscillator performance, facilitating global interoperability and compliance with other electronic device standards.

Related Standards

For comprehensive quality assessment and measurement of oscillator characteristics, the following related IEC and ISO standards are often referenced together with IEC 60679-1:

• IEC 60027: Letter symbols to be used in electrical technology.
• IEC 60050-561: Electrotechnical vocabulary for piezoelectric, dielectric, and electrostatic devices.
• IEC 60469: Definitions and algorithms for transitions, pulses, and related waveforms.
• IEC 60617: Graphical symbols for diagrams.
• IEC 62884-1: Measurement techniques of piezoelectric, dielectric, and electrostatic oscillators.
• IEC 60749-26 / -27: ESD sensitivity testing methods.
• IEC 61340-5-1: Protection of electronic devices from electrostatic phenomena.
• ISO 80000-1: Quantities and units - General.

Ensuring that oscillators meet both IEC 60679-1 and its related standards gives stakeholders high confidence in product quality, reliability, and compatibility within rapidly evolving electronic and telecommunications markets.