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M54HC123 数据表(PDF) 2 Page - STMicroelectronics |
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M54HC123 数据表(HTML) 2 Page - STMicroelectronics |
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2 / 11 page  M54HC123 2/11 IEC LOGIC SYMBOLS INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION TRUTH TABLE X : Don’t Care PIN N° SYMBOL NAME AND FUNCTION 1,9 1A, 2A Trigger Inputs (Negative Edge Triggered) 2, 10 1B, 2B Trigger Inputs (Positive Edge Triggered) 3, 11 1 CLR 2 CLR Direct Reset LOW and trigger Action at Positive Edge 4, 12 1Q, 2Q Outputs (Active Low) 7 2RX/CX External Resistor Capacitor Connection 13, 5 1Q, 2Q Outputs (Active High) 14, 6 1CX 2CX External Capacitor Connection 15 1RX/CX External Resistor Capacitor Connection 8 GND Ground (0V) 16 VCC Positive Supply Voltage INPUTS OUTPUTS NOTE A BCLR QQ H H OUTPUT ENABLE XL H L H INHIBIT HXH L H INHIBIT L H OUTPUT ENABLE L H OUTPUT ENABLE XX L L H INHIBIT |
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