What is Quad Flat J-leaded package (QFJ)?

There are various types of semiconductor and IC packages, such as Quad Flat J-leaded package (QFJ) and Small Outline J-leaded package (SOJ).

Regarding the "Quad Flat J-leaded package (QFJ)", this article will explain the information below.

Quad Flat J-leaded package (QFJ) Definition
Types of Quad Flat J-leaded package (QFJ)

Quad Flat J-leaded package (QFJ) Definition

QFJ stands for "Quad Flat J-leaded package".

Quad Flat J-leaded package (QFJ) is a J-leaded package with leads coming out of four sides of the package.

Compared to Quad Flat Package (QFP), which has a gull wing (L-shaped) lead shape, Quad Flat J-leaded package (QFJ), which has a J-shaped lead shape, has the advantage of less lead deformation.

The pin pitch of the Quad Flat J-leaded package (QFJ) is 50 mils (1.27mm).

Quad Flat J-leaded package (QFJ) has 18 to 84 pins.

The number after QFJ indicates the number of pins. For example, QFJ44 means a 44-pin QFJ.

Also, the "package material" is changed by adding an English letter in front of QFJ.

Supplement

Quad Flat J-leaded package (QFJ) is soldered to the bent portion of the lead.
The leads of a Quad Flat J-leaded package (QFJ) face the inside of the package.
Compared to Quad Flat Package (QFP), Quad Flat J-leaded package (QFJ) can be mounted in a smaller area, and mounting by sockets is relatively common.

Difference between "SOJ" and "QFJ"

The package name changes depending on whether the J-shaped leads exit from two sides or four sides of the package.

Leads coming out of two sides: Small Outline J-leaded package (SOJ)
Leads coming out of four sides: Quad Flat J-leaded package (QFJ)

The following article explains the "Small Outline J-leaded package (SOJ)" in detail. If you are interested, please check it out from the link below.

: What is Small Outline J-leaded package (SOJ)?
続きを見る

Difference between "QFP", "QFJ", and "QFN"

The package name changes depending on whether the leads coming out of the four sides of the package are gull wing (L-shaped) leads, J-shaped leads, or electrode pads.

Gull-wing (L-shaped) lead: Quad Flat Package (QFP)
J-shaped lead: Quad Flat J-leaded package (QFJ)
Electrode pad: Quad Flat Non-leaded package (QFN)

The following article explains "Quad Flat Package (QFP)" and "Quad Flat Non-leaded package (QFN)" in detail. If you are interested, please check it out from the link below.

: What is Quad Flat Package (QFP)?
続きを見る

: What is Quad Flat Non-leaded package (QFN)?
続きを見る

Types of Quad Flat J-leaded package (QFJ)

P-QFJ

The "P-" in front of QFJ stands for "plastic".

Therefore, "Plastic QFJ (P-QFJ)" means a "QFJ whose package material is plastic".

C-QFJ

The "C-" in front of QFJ stands for "ceramic".

Therefore, "Ceramic QFJ (C-QFJ)" means a "QFJ whose package material is ceramic".

G-QFJ

The "G-" in front of QFJ stands for "Glass sealed ceramic".

Therefore, "Glass sealed ceramic QFJ (G-QFJ)" means a "QFJ whose package material is glass sealed ceramic".

PLCC

Plastic Lead Chip Carrier (PLCC) is a QFJ whose package material is plastic, and corresponds to "P-QFJ" in the JEITA package code.

The name "Plastic Lead Chip Carrier (PLCC)" is similar to "QFN with ceramic package material (LCC)", but it is completely different, so please be careful.

Plastic Lead Chip Carrier (PLCC) was named in the U.S. in the 1980s.

CLCC

Ceramic Lead Chip Carrier (CLLC) is a J-leaded package with package leads coming out of the four sides of the package.

Summary

In this article, the following information on the "Quad Flat J-leaded package (QFJ)" was explained.

Quad Flat J-leaded package (QFJ) Definition
Types of Quad Flat J-leaded package (QFJ)

Thank you for reading.

The packages of semiconductors (IC and transistor) other than "Quad Flat J-leaded package (QFJ)" described in this article are explained in detail in the following article. If you are interested, please check it out from the link below.