поискавой системы для электроныых деталей |
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74AHC245D датащи(PDF) 2 Page - NXP Semiconductors |
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74AHC245D датащи(HTML) 2 Page - NXP Semiconductors |
2 / 20 page 1999 Sep 28 2 Philips Semiconductors Product specification Octal bus transceiver; 3-state 74AHC245; 74AHCT245 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/AHCT245 is a high-speed Si-gate CMOS device. The 74AHC/AHCT245 is an octal transceiver featuring non-inverting 3-state bus compatible outputs in both send and receive directions. The 74AHC245/74AHCT245 features an Output Enable (OE) input for easy cascading and a send/receive (DIR) input for direction control. OE controls the outputs so that the buses are effectively isolated. 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 INPUTS/OUTPUTS OE DIR An Bn L L A = B inputs L H inputs B = A HX Z Z SYMBOL PARAMETER CONDITIONS TYPICAL UNIT AHC AHCT tPHL/tPLH propagation delay CL =15pF; VCC =5V 3.5 5.0 ns An to Bn, Bn to An 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 12 15 pF |
Аналогичный номер детали - 74AHC245D |
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Аналогичное описание - 74AHC245D |
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