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74LVC74APWDH Datenblatt(PDF) 6 Page - NXP Semiconductors |
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74LVC74APWDH Datenblatt(HTML) 6 Page - NXP Semiconductors |
6 / 10 page Dual D-type flip-flop with set and reset; positive-edge trigger Philips Semiconductors Product Specification 74LVC74A 1998 Jun 17 6 AC WAVEFORMS VM = 1.5 V at VCC w 2.7 V VM = 0.5 S VCC at VCC < 2.7 V VOL and VOH are the typical output voltage drop that occur with the output load. SV00489 VM nD INPUT nCP INPUT nQ OUTPUT nQ OUTPUT VM VM VM t su t su 1/f max t h th t PHL t PHL t PLH t PLH tW GND GND VI VI VOL VOL VOH VOH NOTE: The shaded areas indicate when the inputis permitted to change for predictable output performance. Figure 1. Clock (nCP) to output (nQ, nQ) propagation delays, clock pulse width, nD to nCP set-up times, the nCP to nD hold times, output transition times and maximum clock pulse frequency. SV00490 VM nCP INPUT nS D INPUT nR D INPUT nQ OUTPUT nQ OUTPUT VM VM VM trem tPHL tPLH tW tW VM tPHL tPLH GND GND GND VI VI VI VOL VOL VOH VOH Figure 2. Set (nSD) and reset (nRD) input to output (nQ, nQ) propagation delays, the set and reset pulse widths and the nRD to nCP removal time. TEST CIRCUIT SWITCH POSITION PULSE GENERATOR RT VI D.U.T. VO CL VCC 500 Ω Open GND S1 VCC VI < 2.7V VCC TEST S1 tPLH/tPHL Open 2.7V 2.7–3.6V 50pF 500 Ω 2 * VCC SV00903 Figure 3. Load circuitry for switching times. |
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