JPS5980830U - semiconductor integrated circuit - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来の電源断時における誤動作防止回路を示す
ブロック図、第２図は第１図の回路の動作説明図、第３
図は本考案に係る半導体集積回路の一実施例を示す接続
区、第４図は同実施例の動作説明図、第５図は同実施例
の使用形態を示すブロック図である。 １・・・制御装置、２・・・被制御機器、ＮＡ・・・ナ
ンド回路、Ｑ１〜Ｑ３・・・トランジスタ、Ｒ１−Ｒ３
・・・抵抗、ＺＤ・・・ツェナタイオード。Figure 1 is a block diagram showing a conventional malfunction prevention circuit when the power is turned off, Figure 2 is an explanatory diagram of the operation of the circuit in Figure 1, and Figure 3 is an illustration of the operation of the circuit in Figure 1.
The figure shows a connection section showing one embodiment of the semiconductor integrated circuit according to the present invention, FIG. 4 is an explanatory diagram of the operation of the same embodiment, and FIG. 5 is a block diagram showing the mode of use of the same embodiment. DESCRIPTION OF SYMBOLS 1... Control device, 2... Controlled equipment, NA... NAND circuit, Q1-Q3... Transistor, R1-R3
...Resistor, ZD...Zena diode.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] オープンコレクタの出力部を有し、これをその前段の論
理演算部によってオン・オフして被制御機器の制御信号
とする半導体集積回路において、ツェナブレークタウン
電圧か集積回路の動作下限電圧あるいは誤動作開始電圧
程度のツェナタイオートを前記論理演算部の電源ライン
に挿設したことを特徴とする半導体集積回路。In semiconductor integrated circuits that have an open collector output section, which is turned on and off by a logic operation section in the preceding stage to provide a control signal for a controlled device, the Zener breaktown voltage, the lower limit voltage for operation of the integrated circuit, or the start of malfunction. A semiconductor integrated circuit, characterized in that a Zener tie auto of approximately voltage is inserted into a power supply line of the logic operation section.