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74AC244 데이터시트(PDF) 2 Page - STMicroelectronics |
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74AC244 데이터시트(HTML) 2 Page - STMicroelectronics |
2 / 8 page INPUT AND OUTPUT EQUIVALENT CIRCUIT TRUTH TABLE INPUT OUT PUT GAn Yn LL L LH H HX Z X: ”H” or ”L” Z: High impedance PIN DESCRIPTION PIN No SYMBOL NAME AND F UNCTIO N 1 1G Output Enable Input 2, 4, 6, 8 1A1 to 1A4 Data Inputs 9, 7, 5, 3 2Y1 to 2Y4 Data Outputs 11, 13, 15, 17 2A1 to 2A4 Data Inputs 18, 16, 14, 12 1Y1 to 1Y4 Data Outputs 19 2G Output Enabel Input 10 GND Ground (0V) 20 VCC Positive Supply Voltage ABSOLUTE MAXIMUM RATINGS Symbol Parameter Val ue Uni t VCC Supply Voltage -0.5 to +7 V VI DC Input Voltage -0.5 to VCC +0.5 V VO DC Output Voltage -0.5 to VCC +0.5 V IIK DC Input Diode Current ± 20 mA IOK DC Output Diode Current ± 20 mA IO DC Output Current ± 50 mA ICC or IGND DC VCC or Ground Current ± 400 mA Tstg Storage Temperature -65 to +150 oC TL Lead Temperature (10 sec) 300 oC Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. RECOMMENDED OPERATING CONDITIONS Symbol Parameter Value Un it VCC Supply Voltage 2 to 6 V VI Input Voltage 0 to VCC V VO Output Voltage 0 to VCC V Top Operating Temperature: -40 to +85 oC dt/dv Input Rise and Fall Time VCC = 3.0, 4.5 or 5.5 V(note 1) 8 ns/V 1) VIN from 30% to 70% of VCC 74AC244 2/8 |
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