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74HCT14PW 데이터시트(PDF) 8 Page - NXP Semiconductors |
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8 / 21 page 74HC_HCT14 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved. Product data sheet Rev. 6 — 19 September 2012 8 of 21 NXP Semiconductors 74HC14; 74HCT14 Hex inverting Schmitt trigger 13. Transfer characteristics 14. Transfer characteristics waveforms Table 9. Test data Type Input Load Test VI tr, tf CL 74HC14 VCC 6.0 ns 15 pF, 50 pF tPLH, tPHL 74HCT14 3.0 V 6.0 ns 15 pF, 50 pF tPLH, tPHL Table 10. Transfer characteristics At recommended operating conditions; voltages are referenced to GND (ground = 0 V); see Figure 8 and Figure 9. Symbol Parameter Conditions Tamb = 25 C Tamb = 40 C to +85 C Tamb = 40 C to +125 C Unit Min Typ Max Min Max Min Max 74HC14 VT+ positive-going threshold voltage VCC = 2.0 V 0.7 1.18 1.5 0.7 1.5 0.7 1.5 V VCC = 4.5 V 1.7 2.38 3.15 1.7 3.15 1.7 3.15 V VCC = 6.0 V 2.1 3.14 4.2 2.1 4.2 2.1 4.2 V VT negative-going threshold voltage VCC = 2.0 V 0.3 0.52 0.9 0.3 0.9 0.3 0.9 V VCC = 4.5 V 0.9 1.4 2.0 0.9 2.0 0.9 2.0 V VCC = 6.0 V 1.2 1.89 2.6 1.2 2.6 1.2 2.6 V VH hysteresis voltage VCC = 2.0 V 0.2 0.66 1.0 0.2 1.0 0.2 1.0 V VCC = 4.5 V 0.4 0.98 1.4 0.4 1.4 0.4 1.4 V VCC = 6.0 V 0.6 1.25 1.6 0.6 1.6 0.6 1.6 V 74HCT14 VT+ positive-going threshold voltage VCC = 4.5 V 1.2 1.41 1.9 1.2 1.9 1.2 1.9 V VCC = 5.5 V 1.4 1.59 2.1 1.4 2.1 1.4 2.1 V VT negative-going threshold voltage VCC = 4.5 V 0.5 0.85 1.2 0.5 1.2 0.5 1.2 V VCC = 5.5 V 0.6 0.99 1.4 0.6 1.4 0.6 1.4 V VH hysteresis voltage VCC = 4.5 V 0.4 0.56 - 0.4 - 0.4 - V VCC = 5.5 V 0.4 0.6 - 0.4 - 0.4 - V Fig 8. Transfer characteristics Fig 9. Transfer characteristics definitions mna207 VO VI VH VT+ VT− mna208 VO VI VH VT+ VT− |
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