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N74F2240N Datasheet(PDF) 6 Page - NXP Semiconductors |
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N74F2240N Datasheet(HTML) 6 Page - NXP Semiconductors |
6 / 10 page Philips Semiconductors Product specification 74F2240, 74F2241 Octal buffers December 13, 1990 6 AC WAVEFORMS Ian, Ibn VM VM VM VM tPLH tPHL Yn SF00328 Waveform 1. Propagation delay for inverting outputs VM VM VM tPHZ tPZH VOH -0.3V 0V Yn, Yn OEn OEb SF00330 Waveform 3. 3-state output enable time to high level and output disable time from high level Ian, Ibn VM VM VM VM tPHL tPLH Yn SF00329 Waveform 2. Propagation delay for non–inverting outputs VM VM VM tPLZ tPZL VOL +0.3V 3.5V OEn OEb Yn, Yn SF00331 Waveform 4. 3-state output enable time to low level and output disable time from low level NOTES: For all waveforms, VM = 1.5V. The shaded areas indicate when the input is permitted to change for predictable output performance. TEST CIRCUIT AND WAVEFORMS tw 90% VM 10% 90% VM 10% 90% VM 10% 90% VM 10% NEGATIVE PULSE POSITIVE PULSE tw AMP (V) 0V 0V tTHL (tf ) INPUT PULSE REQUIREMENTS rep. rate tw tTLH tTHL 1MHz 500ns 2.5ns 2.5ns Input Pulse Definition VCC family 74F D.U.T. PULSE GENERATOR RL CL RT VIN VOUT Test Circuit for Open Collector 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 3.0V 1.5V VM RL 7.0V SF00128 TEST SWITCH tPLZ closed tPZL closed All other open SWITCH POSITION |
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