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74ALS257N Datasheet(PDF) 6 Page - NXP Semiconductors |
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74ALS257N Datasheet(HTML) 6 Page - NXP Semiconductors |
6 / 11 page Philips Semiconductors Product specification 74ALS257/74ALS258 Data selector/multiplexer 1991 Feb 08 6 AC ELECTRICAL CHARACTERISTICS LIMITS SYMBOL PARAMETER TEST CONDITION Tamb = 0°C to +70°C VCC = +5.0V ± 10% CL = 50pF, RL = 500Ω UNIT MIN MAX tPLH tPHL Propagation delay I0n or I1n to Yn Waveform 1 2.0 2.0 9.0 9.0 ns tPLH tPHL Propagation delay S to Yn 74ALS257 Waveform 1, 2 4.0 4.0 12.0 12.0 ns tPZH tPZL Output enable time OE to Yn 74ALS257 Waveform 3 Waveform 4 3.0 4.0 11.0 12.0 ns tPHZ tPLZ Output disable time OE to Yn Waveform 3 Waveform 4 2.0 5.0 9.0 12.0 ns tPLH tPHL Propagation delay I0n or I1n to Yn Waveform 1 2.0 2.0 8.0 8.0 ns tPLH tPHL Propagation delay S to Yn 74ALS258 Waveform 1, 2 4.0 4.0 12.0 12.0 ns tPZH tPZL Output enable time OE to Yn 74ALS258 Waveform 3 Waveform 4 3.0 4.0 11.0 12.0 ns tPHZ tPLZ Output disable time OE to Yn Waveform 3 Waveform 4 2.0 5.0 9.0 12.0 ns AC WAVEFORMS For all waveforms, VM = 1.3V. VM VM VM VM tPHL tPLH I0n, I1n, S Yn, Yn SC00059 Waveform 1. Propagation Delay for Data and Select to Outputs VM VM VM VM tPLH tPHL I0n, I1n, S Yn, Yn SC00060 Waveform 2. Propagation Delay for Data and Select to Outputs VM VM VM tPHZ tPZH OE Yn, Yn VOH -0.3V 0V SC00084 Waveform 3. 3-State Output Enable Time to High Level and Output Disable Time from High Level VM VM VM tPLZ tPZL OEn Yn, Yn VOL +0.3V SC00085 3.5V Waveform 4. 3-State Output Enable Time to Low Level and Output Disable Time from Low Level |
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