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M74HC238B1R Scheda tecnica(PDF) 2 Page - STMicroelectronics |
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M74HC238B1R Scheda tecnica(HTML) 2 Page - STMicroelectronics |
2 / 10 page TRUTH TABLE INPUTS OUTPUS SELECTED OUTPUT ENABLE SELECT G2B G2A G1 C B A Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 X X L X X X LL LLLLLL NONE XH XXXX L L LLLLLL NONE H XXXXX L L LLLLLL NONE LL H LLL H L LLLLLL Y0 LL H L L H L H LLLLLL Y1 LL H L H LLL H LLLLL Y2 LL H L H H LL L H LLLL Y3 LL H H LLLL LL H LLL Y4 LL H H L H LL LLL H L L Y5 LL H H H LLL LLLL H L Y6 L L HHHH L L LLLLL H Y7 X: Don’t Care PIN DESCRIPTION PIN No SYMBOL NAME AND FUNCTION 1, 2, 3 A, B, C Data Inputs 4, 5 G2A G2B Enable Input (Active LOW) 6 G1 Data Enable Input (Active HIGH) 15, 14, 13, 12, 11, 10, 9, 7 Y0 to Y7 Outputs 8 GND Ground (0V) 16 VCC Positive Supply Voltage IEC LOGIC SYMBOLS INPUT AND OUTPUT EQUIVALENT CIRCUIT M54/M74HC238 2/10 |
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