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74AHCT244 Datenblatt(PDF) 9 Page - NXP Semiconductors |
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74AHCT244 Datenblatt(HTML) 9 Page - NXP Semiconductors |
9 / 16 page 1999 Sep 28 9 Philips Semiconductors Product specification Octal buffer/line driver; 3-state 74AHC244; 74AHCT244 Type 74AHCT244 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 nAn to nYn see Figs 4 and 6 15 pF − 3.5 7.4 1.0 8.5 1.0 9.5 ns tPZL/tPZH propagation delay nOE to nYn see Figs 5 and 6 − 3.5 10.4 1.0 12.0 1.0 13.0 ns tPLZ/tPHZ propagation delay nOE to nYn − 5.0 9.4 1.0 10.0 1.0 12.0 ns tPHL/tPLH propagation delay nAn to nYn see Figs 4 and 6 50 pF − 5.0 8.4 1.0 9.5 1.0 10.5 ns tPZL/tPZH propagation delay nOE to nYn see Figs 5 and 6 − 5.5 11.4 1.0 13.0 1.0 14.5 ns tPLZ/tPHZ propagation delay nOE to nYn − 7.0 11.4 1.0 13.0 1.0 14.5 ns Fig.4 The input (nAn) to output (nYn) propagation delays. handbook, halfpage MNA171 nAn INPUT nYn OUTPUT tPLH tPHL GND VI VM VM VM VM VOH VOL FAMILY VI INPUT REQUIREMENTS VM INPUT VM OUTPUT AHC GND to VCC 50% VCC 50% VCC AHCT GND to 3.0 V 1.5 V 50% VCC |
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