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74HC244DB 데이터시트(PDF) 5 Page - NXP Semiconductors |
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74HC244DB 데이터시트(HTML) 5 Page - NXP Semiconductors |
5 / 22 page 74HC_HCT244_3 © Koninklijke Philips Electronics N.V. 2005. All rights reserved. Product data sheet Rev. 03 — 22 December 2005 5 of 22 Philips Semiconductors 74HC244; 74HCT244 Octal buffer/line driver; 3-state 7. Functional description 7.1 Function table [1] H = HIGH voltage level; L = LOW voltage level; X = don’t care; Z = high-impedance OFF-state. 8. Limiting values 2A1 15 2 data input 1 1Y1 16 1 bus output 1 2A0 17 2 data input 0 1Y0 18 1 bus output 0 2OE 19 2 output enable input (active LOW) VCC 20 supply voltage Table 3: Pin description …continued Symbol Pin Description Table 4: Function table [1] Control Input Output nOE nAn nYn LLL HH HX Z Table 5: Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V). Symbol Parameter Conditions Min Max Unit VCC supply voltage −0.5 +7 V IIK input clamping current VI < −0.5 V or VI >VCC + 0.5 V - ±20 mA IOK output clamping current VO < −0.5 V or VO >VCC + 0.5 V - ±20 mA IO output current VO = −0.5 V to (VCC + 0.5 V) - ±35 mA ICC quiescent supply current - 70 mA IGND ground current - −70 mA Tstg storage temperature −65 +150 °C Ptot total power dissipation DIP20 package [1] - 750 mW SO20 package [2] - 500 mW SSOP20 package [3] - 500 mW TSSOP20 package [3] - 500 mW DHVQFN20 package [4] - 500 mW |
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