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74F242 Datasheet(PDF) 6 Page - NXP Semiconductors |
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74F242 Datasheet(HTML) 6 Page - NXP Semiconductors |
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6 / 10 page  Philips Semiconductors Product specification 74F242/74F243 Transceivers 1990 Aug 30 6 AC ELECTRICAL CHARACTERISTICS LIMITS SYMBOL PARAMETER TEST CONDITION VCC = +5V Tamb = +25°C CL = 50pF, RL = 500Ω VCC = +5V ± 10% Tamb = 0°C to +70°C CL = 50pF, RL = 500Ω UNIT MIN TYP MAX MIN MAX tPLH tPHL Propagation delay An, Bn to Bn, An Waveform NO TAG 2.5 2.0 3.5 3.0 6.0 4.5 2.5 2.0 7.0 4.5 ns tPZH tPZL Output Enable time to High or Low level 74F242 Waveform 3 Waveform 4 3.0 3.5 4.0 6.5 7.0 9.0 3.0 3.5 8.0 10.5 ns tPHZ tPLZ Output Disable time from High or Low level Waveform 3 Waveform 4 3.5 3.5 5.5 6.0 8.5 9.5 3.5 3.5 9.0 11.0 ns tPLH tPHL Propagation delay An, Bn to Bn, An Waveform 2 2.5 2.5 4.0 4.0 5.2 5.2 2.0 2.0 6.2 6.5 ns tPZH tPZL Output Enable time to High or Low level 74F243 Waveform 3 Waveform 4 2.0 2.0 4.5 5.0 5.7 7.5 2.0 2.0 6.7 8.5 ns tPHZ tPLZ Output Disable time from High or Low level Waveform 3 Waveform 4 2.0 2.0 4.0 4.5 6.0 6.0 2.0 2.0 7.0 7.0 ns AC WAVEFORMS For all waveforms, VM = 1.5V. An, Bn Bn, An tPHL VM VM VM VM tPLH SF00773 Waveform 1. For Inverting Outputs VM VM VM VM Bn, An An, Bn tPLH tPHL SF00202 Waveform 2. For Non-Inverting Outputs VM VM VM tPLZ tPZH VOH –0.3V OEA OEB An, Bn SF00775 0V 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 OEA OEB An, Bn SF00776 Waveform 4. 3-State Output Enable Time to Low Level and Output Disable Time from Low Level |
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