28 PIN NARROW ROUND MACHINED IC BASE SOCKET

28 Pin Narrow Round Machined IC Base Socket offers a high-reliability interface for easily installing and removing 28-pin Dual In-line Package (DIP) integrated circuits, such as popular microcontrollers (like the ATmega328P or PIC microcontrollers). Featuring precision-machined, round pins, this socket ensures a superior and secure electrical connection compared to lower-cost stamped-contact sockets, making it the preferred choice for applications requiring frequent IC swapping, programming, prototyping, or high-vibration stability. You can confidently integrate this durable socket into your development boards, production systems, and critical control equipment where long-term performance and minimal contact resistance are essential for signal integrity.

Key Features:

• Machined Pin Contacts: Utilizes high-quality, precision-machined contacts (often gold or tin-plated brass) that create a gas-tight, highly reliable connection with the IC pins.
• Low Insertion Force (LIF): Design allows you to insert and extract ICs with significantly less force than standard stamped sockets, minimizing the risk of damage to sensitive IC leads.
• Superior Reliability: The tight, round contact structure offers excellent resilience to shock and vibration and maintains low electrical resistance over time.
• Narrow DIP Standard: Specifically designed to accommodate standard 28-pin DIP devices with a 0.3-inch (7.62 mm) pitch, ensuring wide compatibility.
• Through-Hole Mounting: You can securely mount and solder the socket directly onto the Printed Circuit Board (PCB), providing a robust mechanical and electrical anchor.

Technical Specifications:

• Number of Pins: 28.
• Pitch (Pin Spacing): 2.54 mm (0.1 inch).
• Row Spacing (DIP Width): 7.62 mm (0.3 inch), Narrow.
• Contact Type: Precision Machined, Round Pin.
• Contact Resistance: Typically < 20 mΩ (Low resistance ensures minimal signal loss).
• Insulator Material: Typically Black Glass-Filled Thermoplastic (High temperature resistance).

Mechanical Specifications:

• Mounting Style: Through-Hole Technology (THT).
• Contact Plating: Often Gold or Tin plating over Nickel base layer.
• Operating Temperature Range: Generally −40°C to +105°C.
• Durability (Mating Cycles): Rated for hundreds of insertion/extraction cycles, ideal for test and development environments.

Dimensions:

• Overall Length: ≈ 35.8 mm.
• Overall Width: ≈ 10.16 mm (for 0.3-inch row spacing).
• Body Height (Above PCB): ≈ 4.5 mm.
• Mounting Pin Length: ≈ 3.0 mm.
• Weight: ≈ 2.5 g.

Pinout and Wiring:

• Pinout Standard: Follows the standard DIP package numbering convention, starting with Pin 1 at the top-left of the socket (marked by a notch/indentation) and proceeding counter-clockwise.
• Usage: Insert the 28-pin IC directly into the socket, ensuring the IC’s pin 1 indicator aligns with the socket’s notch.
• Wiring: You simply connect the corresponding socket pins to the desired traces on the PCB. No external wiring is required for the socket itself.

Datasheet Reference:

• Download Generic 28 Pin Machined IC Socket Datasheet Reference

Commonly Used in:

• Microcontroller Boards: Ideal for Arduino Uno clones (for ATmega328P) and PIC development boards where the chip is frequently programmed.
• EPROM/EEPROM Programmers: Provides a reliable base for inserting memory chips for flashing or reading data.
• Prototyping & Breadboarding: Offers a stable, long-lasting interface on permanent protoboards.

Applications:

• IC Testing Fixtures: Used in QA and testing environments where repeated insertion and removal of chips is necessary.
• Repairable Electronics: Allows field technicians to easily swap out a faulty chip without desoldering.
• Custom Microprocessor Systems: Implemented in industrial controls and legacy systems that utilize through-hole DIP components.

Equivalent Models:

• Preci-Dip Series: High-end, similar precision machined sockets, often used in military or aerospace applications.
• Mill-Max Sockets: Another premium brand known for its high-quality machined-pin receptacles.
• Other Branded 28-Pin Machined Sockets: Search for equivalents from major manufacturers like TE Connectivity or Amphenol designated for 0.3-inch DIP devices.

Package Includes:

• 1 x 28 Pin Narrow Round Machined IC Base Socket (0.3″ Pitch)