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74F777 Folha de dados(PDF) 8 Page - NXP Semiconductors |
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74F777 Folha de dados(HTML) 8 Page - NXP Semiconductors |
8 / 12 page Philips Semiconductors Product specification 74F777 Triple bidirectional latched bus transceiver (3–State + Open Collector) May 19, 1992 8 VM VM VM tPHZ tPZH VOH -0.3V 0V OEAn An SF00439 Waveform 3. 3-State output enable time to High level and output disable time from High level VM VM VM tPLZ tPZL VOL +0.3V An OEAn SF00440 Waveform 4. 3-State output enable time to Low level and output disable time from Low level Notes to AC waveforms For all waveforms, VM = 1.5V. The shaded areas indicate when the input is permitted to change for predictable output performance. TEST CIRCUITS AND WAVEFORMS tw 90% VM 10% 90% VM 10% 90% VM 10% 90% VM 10% NEGATIVE PULSE POSITIVE PULSE tw AMP (V) low V low V tTHL (tf ) INPUT PULSE REQUIREMENTS rep. rate tw tTLH tTHL 1MHz 500ns 2.5ns 2.5ns Input pulse definition VCC family A port D.U.T. PULSE GENERATOR RL CL RT VIN VOUT Test circuit for 3–State outputs on A port DEFINITIONS: RL = Load resistor; see AC electrical characteristics for value. CL = Load capacitance includes jig and probe capacitance; see AC electrical characteristics for value. RU = Pull up resistor; see AC electrical characteristics for value. CD = 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 VCC D.U.T. PULSE GENERATOR CD RT VIN VOUT Test circuit for outputs on B port RU 7.0V 1MHz 500ns B port 2.0V 1.0V 4.0ns 4.0ns Low V 0.0V 1.0V SWITCH POSITION TEST SWITCH closed open All other tPLZ, tPZL SF00431 |
Nº de peça semelhante - 74F777 |
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Descrição semelhante - 74F777 |
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