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MC74VHCT259AM Datasheet(PDF) 6 Page - ON Semiconductor |
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MC74VHCT259AM Datasheet(HTML) 6 Page - ON Semiconductor |
6 / 9 page MC74VHCT259A http://onsemi.com 6 TIMING REQUIREMENTS (Input tr = tf = 3.0ns) Symbol Parameter Test Conditions TA = 25°C TA = ≤ 85°C TA = ≤ 125°C Unit Min Typ Max Min Max Min Max tw Minimum Pulse Width, Reset or Enable (Figure 10) VCC = 3.3 ± 0.3V 5.0 5.5 5.5 ns VCC = 5.0 ± 0.5V 5.0 5.5 5.5 tsu Minimum Setup Time, Address or Data to Enable (Figure 10) VCC = 3.3 ± 0.3V 4.5 4.5 4.5 ns VCC = 5.0 ± 0.5V 3.0 3.0 3.0 th Minimum Hold Time, Enable to Address or Data (Figure 8 or 9) VCC = 3.3 ± 0.3V 2.0 2.0 2.0 ns VCC = 5.0 ± 0.5V 2.0 2.0 2.0 tr, tf Maximum Input, Rise and Fall Times (Figure 6) VCC = 3.3 ± 0.3V 400 300 300 ns VCC = 5.0 ± 0.5V 200 100 100 50% 50% tPHL 50% tPHL DATA IN ADDRESS SELECT OUTPUT Q VCC GND VCC GND VCC GND *Includes all probe and jig capacitance Figure 6. Switching Waveform CL* TEST POINT DEVICE UNDER TEST OUTPUT OUTPUT Q DATA IN 50% tPLH tPHL tf GND VCC 50% Figure 7. Switching Waveform tr Figure 8. Switching Waveform Figure 9. Switching Waveform Figure 10. Switching Waveform Figure 11. Test Circuit 50% tw 50% tPHL DATA IN OUTPUT Q RESET VCC GND VCC GND VCC GND VCC GND DATA IN OUTPUT Q ENABLE DATA IN OR ADDRESS SELECT ENABLE VCC GND VCC GND tw tw 50% 50% 50% tPHL tPHL 50% 50% tsu th(H) th(H) tsu |
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