Quad-in-line sockets provide a smaller footprint alternative to 64-pin DIPs for integrated circuits requiring more than 40 contacts. They are assembled with precision-machined receptacles containing multi-finger contact clips housed in high temperature thermoplastic insulators. The receptacles use a two-piece construction of a brass alloy shell housing a highly reliable beryllium copper contact clip. This provides multiple contact points for better power distribution than stamped pins. Quad-in-line sockets also allow for smaller size and lower inductance wiring while still providing heat dissipation. They find applications in medical equipment, aerospace, consumer electronics, automotive, and military systems.

1. QUAD-IN-LINE SOCKETS

2. QUAD-IN-LINE SOCKETS:
• To produce an inexpensive integrated circuit package suited for
chips with more than 40 contacts, but with a smaller footprint
than the 64-pin DIP, Quad-In-Line Packaging come to existence.
• It was increasingly difficult to implement all the desired
functionality of new IC’s without needing more contacts. A 64-
pin DIP package existed, but was very large, with high lead
inductance
• Quad-In-Line Sockets are assembled with precision-machined
receptacles with multi-finger contact clip and packaged in high
temperature thermoplastic insulators.

3. MACHINED PIN:
• Machined pin sockets are made with two-piece construction. Shell or
sleeve is made of brass alloy 360 ½ hard, an alloy known for its
strength, conductive, and thermal properties.
• Press-fit assembled inside each shell is a highly reliable, four-finger
beryllium copper contact clip, which scores the mating device lead,
forming a gas-tight electrical and mechanical connection.
• Multi-finger contact clips are superior to stamped pin wiping
connector blades because they provide multiple points of contact to
the mating pin, resulting in providing better power and force
distribution.
• Two-piece receptacle construction (shell and contact clip) allows for
cost-efficient plating combinations. Receptacle shells can be plated
with tin for solderability. Contact clips can be gold-plated for
optimum conductivity.

4. ADVANTAGES:
• The QUIP footprint is less than 2/3 the size of a 64-pin DIP.
• The QUIP package supports devices with higher power
dissipation due to the heat sink inherent in the retaining clip.
• Due to the smaller package size, the overall length of the
conductors from the die to the contacts is short, and has lower
inductance.

5. APPLICATIONS:
• In medical equipment’s
• For aerospace applications
• In consumer electronics
• In automotive industries
• For military applications

6. • Author Nalin P. Sheth, MBA Harvard, is Managing Director of
Champion Electronics Pvt. Ltd., Pune, 411026, India.
• Champion Electronics is serving electronics industry all over the
world from 1975.
• Contact Details:
• Email: sales@champelec.com
• Ph: +91-8928502180.
• Website: www.champelec.com