JPH02223179A - Socket for semiconductor integrated circuit - Google Patents

Abstract

PURPOSE:To judge the quality of the contact state via only the visual observation of the luminescence of a light emitting diode by fitting the light emitting diode to each lead of a socket. CONSTITUTION:One electrode of a light emitting diode 3 is connected to a contact pin 2 of a socket, and the other electrode is connected to an external power feed terminal 4 in common. When an output transistor 9 in an IC 5 is turned on, the external lead 8 of the IC 5 and the contact pin 2 of the socket are set to nearly zero potential, and a current is fed to the light emitting diode 3 by a power source 10 connected to the external power feed terminal 4 of the socket for luminescence. Whether the external extracting lead is brought into electrically satisfactory contact with the socket or not can be visually observed, and the quality of the connection state can be judged.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a socket for semiconductor integrated circuits.

[Conventional technology]

Conventionally, sockets for semiconductor integrated circuits have only had the function of maintaining contact with external leads of semiconductor integrated circuits.

[Problem to be solved by the invention]

The conventional socket for semiconductor integrated circuits mentioned above is only an electronic component compatible with the external lead of the semiconductor integrated circuit, so it is impossible to visually check whether the external lead and the contact pin of the socket are in good electrical contact. I had no idea whether the connection was good or bad without using an electrical measuring device.

[Means for Solving the Problems a] The present invention provides a socket for a semiconductor integrated circuit in which a plurality of contact pins arranged corresponding to external lead-out leads of a semiconductor integrated circuit are sealed with a resin, and a resin portion of the socket. A plurality of light emitting diodes are provided, each having a light emitting window located on the side surface, one electrode connected to the contact pin in a one-to-one correspondence, and the other electrode connected to an external power supply terminal.

〔Example〕

Next, embodiments of the present invention will be described using the drawings.

FIG. 1 is a perspective view of one embodiment of the present invention, and FIG. 2 is an equivalent circuit diagram of one block of the electric circuit of the socket of the embodiment shown in FIG. 1 and an IC inserted into the socket.

One electrode of the light emitting diodes 3 is connected to the contact pins 2 of the socket, and the other electrodes are commonly connected to the external power supply terminal 4.

As shown in FIG. 2, the internal output transistor 9 of the IC5
When is in the on state, the external lead 8 of the IC 5 and the contact pin 2 of the socket are at almost zero potential, and the light emitting diode 3 is supplied with current by the power source 10 connected to the external power supply terminal 4 of the socket and emits light. .

When the transistors 1 to 9 are in the off state, the external lead 8 and the contact pin 2 rise to the power supply voltage supplied to the IC 5, and no current flows through the light emitting diode 3.
Does not emit light.

〔Effect of the invention〕

As explained above, in the present invention, since a light emitting diode is attached to each lead of the socket, it is possible to determine whether the contact state between the external lead of the semiconductor integrated circuit and the contact pin of the socket is good or not simply by visually checking whether or not the light emitting diode emits light. This has the effect that it can be determined without the need to use other electrical measuring instruments.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of one embodiment of the present invention, and FIG. 2 is a perspective view of the socket of the embodiment shown in FIG. 1 and an IC inserted into the socket.
FIG. 2 is an equivalent circuit diagram of one block of the electric circuit of FIG. 1...Socket body, 2...Contact pin, 3.
...Light emitting diode, 4...External power supply terminal, 5.
...IC16...IC power supply terminal, 7...IC common terminal, 8...external drawer lead, 9...internal output transistor 10...external power supply.

Claims (1)

[Claims] A socket for a semiconductor integrated circuit in which a plurality of contact pins arranged corresponding to external lead-out leads of a semiconductor integrated circuit are sealed with resin, a light emitting window is located on the side surface of the resin part of the socket, and one electrode is connected to the contact pin. 1 on the pin
A socket for a semiconductor integrated circuit, characterized in that a plurality of light emitting diodes are connected in a pair-to-one correspondence and the other electrode is connected to an external power supply terminal.