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74AHCT244PW датащи(PDF) 2 Page - NXP Semiconductors |
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74AHCT244PW датащи(HTML) 2 Page - NXP Semiconductors |
2 / 16 page 1999 Sep 28 2 Philips Semiconductors Product specification Octal buffer/line driver; 3-state 74AHC244; 74AHCT244 FEATURES • ESD protection: HBM EIA/JESD22-A114-A exceeds 2000 V MM EIA/JESD22-A115-A exceeds 200 V CDM EIA/JESD22-C101 exceeds 1000 V • Balanced propagation delays • All inputs have a Schmitt-trigger action • Inputs accepts voltages higher than VCC • For AHC only: operates with CMOS input levels • For AHCT only: operates with TTL input levels • Specified from −40 to +85 and +125 °C. DESCRIPTION The 74AHC/AHCT244 is a high-speed Si-gate CMOS device. The 74AHC/AHCT244 is an octal non-inverting buffer/line driver with 3-state outputs. The 3-state outputs are controlled by the outputs enable inputs 1OE and 2OE. A HIGH on nOE causes the outputs to assume a high-impedance OFF state. FUNCTION TABLE See note 1. Note 1. H = HIGH voltage level; L = LOW voltage level; X = don’t care; Z = high-impedance OFF state. QUICK REFERENCE DATA GND = 0 V; Tamb =25 °C; tr =tf ≤ 3.0 ns. Notes 1. CPD is used to determine the dynamic power dissipation (PD in µW). PD =CPD × VCC2 × fi + ∑ (CL × VCC2 × fo) where: fi = input frequency in MHz; fo = output frequency in MHz; ∑ (CL × VCC2 × fo) = sum of outputs; CL = output load capacitance in pF; VCC = supply voltage in Volts. 2. The condition is VI = GND to VCC. INPUTS OUTPUT nOE nAn nYn LLL LH H HX Z SYMBOL PARAMETER CONDITIONS TYPICAL UNIT AHC AHCT tPHL/tPLH propagation delay 1An to 1Yn; 2An to 2Yn CL =15pF; VCC =5V 3.5 5.0 ns CI input capacitance VI =VCC or GND 3.5 3.5 pF CO output capacitance 4.0 4.0 pF CPD power dissipation capacitance CL =50pF; f = 1 MHz; notes 1 and 2 10 12 pF |
Аналогичный номер детали - 74AHCT244PW |
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Аналогичное описание - 74AHCT244PW |
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