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74ALS251 Datasheet(PDF) 5 Page - NXP Semiconductors |
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74ALS251 Datasheet(HTML) 5 Page - NXP Semiconductors |
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5 / 8 page  Philips Semiconductors Product specification 74ALS251 8-input multiplexer (3-State) 1991 Feb 08 5 AC WAVEFORMS For all waveforms, VM = 1.3V. VM VM VM VM VOUT VIN tPHL tPLH SF00093 Waveform 1. Propagation Delay for Inverting Output VM VM VM VM VOUT VIN tPLH tPHL SF00092 Waveform 2. Propagation Delay for Non-inverting Output VM VM VM tPHZ tPZH OE Y, Y VOH -0.3V 0V SC00070 Waveform 3. 3-State Output Enable Time to High Level and Output Disable Time from High Level VM VM VM tPLZ tPZL OE Y, Y VOL +0.3V SC00071 3.5V Waveform 4. 3-State Output Enable Time to Low Level and Output Disable Time from Low Level TEST CIRCUIT AND WAVEFORMS tw 90% VM 10% 90% VM 10% 90% VM 10% 90% VM 10% NEGATIVE PULSE POSITIVE PULSE tw AMP (V) 0.3V 0.3V tTHL (tff) INPUT PULSE REQUIREMENTS Rep.Rate tw tTLH tTHL 1MHz 500ns 2.0ns 2.0ns Input Pulse Definition VCC Family 74ALS D.U.T. PULSE GENERATOR RL CL RT VIN VOUT Test Circuit for 3-State Outputs DEFINITIONS: RL = Load resistor; see AC electrical characteristics for value. CL = Load capacitance includes jig and probe capacitance; see AC electrical characteristics for value. RT = Termination resistance should be equal to ZOUT of pulse generators. tTHL (tf ) tTLH (tr ) tTLH (tr ) AMP (V) Amplitude 3.5V 1.3V VM SC00072 RL 7.0V SWITCH POSITION TEST SWITCH tPLZ, tPZL closed All other open |
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Descripción similar - 74ALS251 |
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