Card connector

A card connector, also commonly known as a card socket or card slot, is an electromechanical device designed to provide a reliable interface between a portable memory card or smart card and a host device, such as a computer, smartphone, camera, or point-of-sale terminal.

Its primary function is to facilitate the transmission of data, power, and sometimes control signals between the card and the device. The connector typically consists of a series of precisely aligned spring-loaded contacts that mate with the conductive pads on the surface of the inserted card. It also includes a mechanical housing that ensures correct card alignment, insertion, and ejection.

Card connectors are critical components in modern electronics, enabling the removable and expandable storage, security, and connectivity that are essential for a wide range of applications.

Key Features:

• Interface Type: Supports specific standards like SD, microSD, SIM, Memory Stick, CFexpress, etc.

• Contact Mechanism: Uses gold-plated spring contacts for low resistance and high durability.

• Mechanical Design: Often includes an ejection mechanism (push-push or push-pull) and a detection switch to sense card insertion/removal.

• Form Factor: Designed to match the physical dimensions of the target card (Standard, Mini, Micro).

• Pin Count: Varies depending on the card standard (e.g., 8 pins for SD, 6 pins for microSD, 8 pins for SIM).

Common Types of Card Connectors:

• SD / microSD Card Connector: For removable flash memory in cameras, phones, and drones.

• SIM Card Connector: For subscriber identity modules in smartphones and cellular IoT devices.

• Memory Stick Connector (Sony proprietary): Primarily found in older Sony devices.

• CFexpress / XQD Connector: For high-speed professional photography and videography.

• Smart Card Connector: Used in security, banking, and ID applications (e.g., credit cards, access cards).