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MC74HCXXXADT Datasheet(PDF) 6 Page - Motorola, Inc |
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MC74HCXXXADT Datasheet(HTML) 6 Page - Motorola, Inc |
6 / 9 page MC54/74HC165A MOTOROLA High–Speed CMOS Logic Data DL129 — Rev 6 6 SWITCHING WAVEFORMS tr tf VCC GND 90% 50% 10% tPLH tPHL CLOCK OR CLOCK INHIBIT 90% 50% 10% tTLH tTHL QH OR QH Figure 1. Serial–Shift Mode SERIAL SHIFT/ PARALLEL LOAD QH OR QH 50% tPLH 50% VCC GND tPHL 50% Figure 2. Parallel–Load Mode tr tf INPUT H 90% 50% 10% 90% 50% 10% VCC GND tPHL tTHL tTLH tPLH QH OR QH Figure 3. Parallel–Load Mode 50% VCC GND th VCC GND ASYNCHRONOUS PARALLEL LOAD (LEVEL SENSITIVE) SERIAL SHIFT/ PARALLEL LOAD INPUTS A–H Figure 4. Parallel–Load Mode INPUT SA 50% 50% CLOCK OR CLOCK INHIBIT VCC GND VCC GND Figure 5. Serial–Shift Mode SERIAL SHIFT/ PARALLEL LOAD CLOCK OR CLOCK INHIBIT 50% 50% tsu VCC GND VCC GND CLOCK 2 INHIBITED CLOCK INHIBIT CLOCK 50% 50% tsu trec VCC GND VCC GND Figure 6. Serial–Shift Mode Figure 7. Serial–Shift, Clock–Inhibit Mode Figure 8. Test Circuit * Includes all probe and jig capacitance CL* TEST POINT DEVICE UNDER TEST OUTPUT tw 1/fmax tw VALID tsu VALID tsu th th |
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