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74AHCT257 Arkusz danych(PDF) 10 Page - NXP Semiconductors |
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74AHCT257 Arkusz danych(HTML) 10 Page - NXP Semiconductors |
10 / 20 page 2000 Apr 03 10 Philips Semiconductors Product specification Quad 2-input multiplexer; 3-state 74AHC257; 74AHCT257 Type 74AHCT257 GND = 0 V; tr =tf ≤ 3.0 ns. Note 1. Typical values at VCC = 5.0 V. AC WAVEFORMS SYMBOL PARAMETER TEST CONDITIONS Tamb (°C) UNIT WAVEFORMS CL 25 −40 to +85 −40 to +125 MIN. TYP. MAX. MIN. MAX. MIN. MAX. VCC = 4.5 to 5.5 V; note 1 tPHL/tPLH propagation delay nI0 to nY; nI1 to nY see Figs 6 and 8 15 pF − 3.7 6.5 1.0 8.0 1.0 9.0 ns propagation delay StonY − 5.1 9.0 1.0 10.5 1.0 11.5 ns tPZH/tPZL 3-state output enable time OE to nY see Figs 7 and 8 − 3.9 8.0 1.0 9.0 1.0 10.0 ns tPHZ/tPLZ 3-state output disable time OE to nY − 4.5 7.5 1.0 8.0 1.0 8.5 ns tPHL/tPLH propagation delay nI0 to nY; nI1 to nY see Figs 6 and 8 50 pF − 4.9 8.5 1.0 10.0 1.0 11.0 ns propagation delay StonY − 6.4 10.5 1.0 12.5 1.0 13.5 ns tPZH/tPZL 3-state output enable time OE to nY see Figs 7 and 8 − 5.1 10.0 1.0 11.0 1.0 12.0 ns tPHZ/tPLZ 3-state output disable time OE to nY − 6.5 9.5 1.0 10.5 1.0 11.5 ns FAMILY VI INPUT REQUIREMENTS VM(1) INPUT VM(2) OUTPUT AHC GND to VCC 50% VCC 50% VCC AHCT GND to 3.0 V 1.5 V 50% VCC handbook, halfpage MNA486 tPHL tPLH VM (2) VM (1) nI0, nI1, S input nY output GND VI VOH VOL Fig.6 The data inputs (1I0, 1I1) and common data select input (S) to output (nY) propagation delays. |
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