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74VHC138MTR Arkusz danych(PDF) 2 Page - STMicroelectronics |
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74VHC138MTR Arkusz danych(HTML) 2 Page - STMicroelectronics |
2 / 12 page 74VHC138 2/12 Figure 2: Input Equivalent Circuit Table 2: Pin Description Table 3: Truth Table X : Don’t care Figure 3: Logic Diagram This logic diagram has not be used to estimate propagation delays PIN N° SYMBOL NAME AND FUNCTION 1, 2, 3 A, B, C Address Inputs 4, 5 G2A, G2B Enable Inputs 6 G1 Enable Input 15, 14, 13, 12, 11, 10, 9, 7 Y0 to Y7 Outputs 8 GND Ground (0V) 16 VCC Positive Supply Voltage INPUTS OUTPUTS ENABLE SELECT G2B G2A G1 CBA Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 X X L X X X HHHHHHHH X H XXXX HHHHHHHH H XXXXX HHHHHHHH L L H L L L L HHHHHHH L L H L L H H L HHHHHH L L H L H L HH L HHHHH L L H L HH HHH L HHHH L L HH L L HHHH L HHH L L HH L H HHHHH L H H L L HHH L HHHHHH L H L L HHHH HHHHHHH L |
Podobny numer części - 74VHC138MTR |
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Podobny opis - 74VHC138MTR |
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