IEC 61837-4:2015

Overview

IEC 61837-4:2015 is an international standard published by the International Electrotechnical Commission (IEC) that specifies the outline drawings and terminal lead connections for surface mounted piezoelectric devices with hybrid enclosure outlines. This standard is part 4 of the IEC 61837 series, which focuses on surface mounted piezoelectric devices used for frequency control and selection. The document builds upon IEC 61240:2012, which standardizes the general layout rules for surface-mounted device outlines.

The 2015 edition introduces important technical updates over the previous edition, including a refined approach to outline drawings-now consisting of four views (top, front, right, and below) instead of three-and revised enclosure configurations for enhanced clarity and design uniformity.

Key Topics

• Hybrid Enclosure Outlines: The document defines the physical outline and terminal lead configurations of piezoelectric devices with hybrid enclosures, including detailed dimensions and variations.
• Updated Outline Drawings: Four-view outline drawings provide comprehensive geometric representation compared to the prior three-view approach, improving device characterization.
• Terminal Lead Connections: Detailed terminal connection assignments for various device types ensure consistent interfacing for frequency control applications.
• Enclosure Configurations: Revised enclosure types cover devices ranging from four to eight connection pads or bent leads, allowing broad applicability across different industry needs.
• Dimensions and Scaling: The standard stipulates dimensional limits and recommends appropriate scale representations for technical drawings, facilitating accurate manufacturing and verification.
• Designation System: A clear coding scheme for surface mounted piezoelectric devices with hybrid enclosures is provided for precise identification in design and procurement.

Applications

IEC 61837-4:2015 is essential for manufacturers, designers, and engineers working with piezoelectric frequency control devices in various industries such as:

• Telecommunications: For oscillators and filters requiring precise frequency selection and control in compact surface mount packages.
• Consumer Electronics: Enabling miniaturized timing devices and resonators with hybrid enclosures suited for mass production.
• Automotive Electronics: Assisting in the reliable implementation of piezoelectric components within hybrid packaging in harsh environments.
• Industrial Automation: Offering standardized outlines for devices used in control systems demanding frequency stability and compactness.
• Medical Devices: Supporting accurate frequency control components embedded in sensitive diagnostic and monitoring equipment.

The standardized outlines and terminal configurations facilitate interoperability, reduce design errors, and improve device interchangeability in surface mount technology (SMT) applications.

Related Standards

• IEC 61240:2012 – Piezoelectric devices: Preparation of outline drawings of surface-mounted devices for frequency control and selection - General rules. This is a normative reference for IEC 61837-4 and provides foundational layout rules.
• Other parts of the IEC 61837 series, which collectively cover different aspects and device types related to surface mounted piezoelectric frequency control devices.
• ISO/IEC Directives, Part 2 – Governing the preparation of international standards, which guided the drafting process of IEC 61837-4:2015.

Adherence to IEC 61837-4:2015 alongside its referenced standards ensures consistent international quality and compatibility in surface mounted piezoelectric device applications, supporting global market requirements.

Keywords: IEC 61837-4:2015, piezoelectric devices, hybrid enclosure outlines, surface mounted devices, frequency control, terminal lead connections, SMT, piezoelectric oscillators, standard outlines, device dimensions, IEC standards, electronic components, frequency selection components.