JPS592180B2 - hand dryer - Google Patents

Description

[Detailed description of the invention] The present invention relates to a semiconductor integrated circuit device.

For semiconductor integrated circuit devices of the same series with the same circuit and the same external shape but slightly different maximum running paths and electrical characteristics, if these different types of semiconductor integrated circuit devices are mixed after assembly and sealing, the conventional AC, Accurate classification is not possible using DC testing alone.

This is because, for example, even if an attempt is made to classify the rods by a pressure resistance test, a rod with somewhat higher pressure resistance characteristics may meet the standards for a product with a higher pressure resistance characteristic. 5. Therefore, an object of the present invention is to provide a semiconductor integrated circuit device that can easily distinguish between identical circuits and semiconductor integrated circuit devices of the same shape but of different types. .

The basic structure 10 of the present invention for achieving the above object is as follows:
At least the circuit configuration as seen from the external terminal is the same,
In a plurality of semiconductor integrated circuit devices having the same external shape and different types, 15 elements that do not affect the circuit operation of each of the semiconductor integrated circuit devices and have different element characteristics depending on the type are connected to external terminals. It is characterized by being built in a position where measurements can be made more easily. below,
The present invention will be specifically described with reference to embodiments and the drawings.

FIG. 1 is a circuit diagram showing an example of the case where the present invention is applied to 20 semiconductor integrated circuits for outputting audio equipment, so-called Power E-C.

A first-stage amplification section made up of a differential amplification circuit made up of transistors Q1, Q2, and Q3, and a drive made up of transistors Q6 and Q7 whose output is applied via an emitter 25 follower output circuit made up of transistors Q4 and Q5. In a semiconductor integrated circuit constituted by a circuit and a push-pull output multiplier circuit including transistors Q8 to Qll driven by this drive circuit, an external terminal G to which an externally attached bootstrap resistor is connected; Between H, resistors R and O having values of, for example, IKΩ, 2Ω, 4Ω, etc. for each type are built into the semiconductor integrated circuit.

Since a bootstrap resistor of about 100Ω is usually connected between the terminals G and H above, the value of the resistor R1o that is connected in parallel with this and indicates each of the above types is IK.
If it is set to Ω or more, there is no fear that the provision of the resistor R1o will have any effect on the circuit operation. Classification of each product type can be easily and accurately performed by measuring the resistances R and l. Therefore, when using an element for displaying the product type, such as a diffused resistor, it is necessary to take into account the variation in the resistance value when setting the element. This element needs to be built in at a location where it can be easily measured from the external terminal. Although any element may be used to indicate each product type, using a resistor as shown in the above embodiment is advantageous in that it can be built into a semiconductor integrated circuit and is easy to measure.

When using a resistor in this way, the external terminal provided for connecting the external resistor serves as a guide for incorporating the resistor that indicates the type. If it is a power source, it is the bootstrap resistor as explained above.In a digital circuit, for example, an ECL circuit, in a NOR circuit as shown in FIG. An emitter for the emitter follower output circuit and a resistor are usually connected, and the value thereof is about 50Ω. Therefore, it is sufficient to incorporate a resistor Rl7 of about 1KΩ, 2KΩ, etc. into the semiconductor integrated circuit for each type. The present invention can be widely applied to semiconductor integrated circuits of different types with the same circuit configuration and the same external shape as seen from external terminals.

[Brief explanation of drawings]

FIG. 1 and FIG. 2 are circuit diagrams each showing an embodiment of the present invention. Q, ~Q,7...Transistor, R1~Rl7...
Resistance, A1-A6...Diode, A-H, I-B.
...External terminal.

Claims (1)

[Claims] 1. In a plurality of semiconductor integrated circuit devices of different types with the same or similar circuit configuration and the same or similar external shape, each type has different element characteristics, and the difference in element characteristics is different from the above semiconductor integrated circuit device. A plurality of semiconductor integrated circuit devices of different types, characterized in that elements that do not essentially adversely affect the operation of each circuit of the circuit device are built into the semiconductor integrated circuit device at a position that can be measured from its external terminal. circuit device.