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M54HC193 Datasheet(PDF) 2 Page - STMicroelectronics |
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M54HC193 Datasheet(HTML) 2 Page - STMicroelectronics |
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2 / 13 page  M54HC193 2/13 IEC LOGIC SYMBOLS INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION TRUTH TABLE X : Don’t Care PIN N° SYMBOL NAME AND FUNCTION 3, 2, 6, 7 QA to QD Flip-Flop Outputs 4 CCD Count Down Clock Input 5 CCU Count Up Clock Input 11 LOAD Asynchronous Parallel Load Input (Active LOW) 12 CARRY Count Up (Carry) Output (Active LOW) 13 BORROW Count Down (Borrow) Output (Active LOW) 14 CLR Asynchronous Reset Input (Active High) 15, 1, 10, 9 A to D Data Inputs 8 GND Ground (0V) 16 VCC Positive Supply Voltage COUNT UP COUNT DOWN LOAD CLEAR FUNCTION HH L COUNT UP HH L NO COUNT HH L COUNT DOWN HH L NO COUNT X X L L PRESET X X X H RESET |
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