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N74F2245N Datasheet(PDF) 6 Page - NXP Semiconductors |
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N74F2245N Datasheet(HTML) 6 Page - NXP Semiconductors |
6 / 10 page Philips Semiconductors Product specification 74F2245 Octal transceiver with 30 W equivalent output termination (3-State) 1996 May 10 6 AC WAVEFORMS For all waveforms, VM = 1.5V. VM VM VM VM Bn, An An, Bn tPLH tPHL SF00202 Waveform 1. Propagation Delay for Non-Inverting Output VOH–0.3V VM VM VM An, Bn tPZH tPHZ SF00203 OE 0V Waveform 2. 3-State Output Enable Time to High Level and Output Disable Time from High Level VOL+0.3V VM VM VM An, Bn tPZL tPLZ SF00204 OE Waveform 3. 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) 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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