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74HCT2G17 Arkusz danych(PDF) 8 Page - NXP Semiconductors |
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74HCT2G17 Arkusz danych(HTML) 8 Page - NXP Semiconductors |
8 / 18 page 74HC_HCT2G17_1 © NXP B.V. 2006. All rights reserved. Product data sheet Rev. 01 — 6 October 2006 8 of 18 NXP Semiconductors 74HC2G17; 74HCT2G17 Dual non-inverting Schmitt trigger [1] tpd is the same as tPLH and tPHL [2] tt is the same as tTLH and tTHL [3] CPD is used to determine the dynamic power dissipation (PD in µW). PD =CPD × VCC2 × fi × N+ Σ(CL × VCC2 × fo) where: fi = input frequency in MHz; fo = output frequency in MHz; CL = output load capacitance in pF; VCC = supply voltage in V; N = number of inputs switching; Σ(C L × VCC 2 × f o) = sum of the outputs. 13. Waveforms 74HCT2G17 tpd propagation delay nA to nY; see Figure 5 [1] VCC = 4.5 V; CL = 50 pF - 21 29 - 36 45 ns tt transition time nY; see Figure 5 [2] VCC = 4.5 V; CL = 50 pF - 6 15 - 19 22 ns CPD power dissipation capacitance VI = GND to VCC − 1.5 V [3] -10- - - - pF Table 9. Dynamic characteristics …continued Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 6. Symbol Parameter Conditions 25 °C −40 °C to +125 °C Unit Min Typ Max Min Max (85 °C) Max (125 °C) Measurement points are given in Table 10. VOL and VOH are typical voltage output drop that occur with the output load. Fig 5. The data input (nA) to output (nY) propagation delays and output transition times 001aaf302 VI nA input tPLH VM 90 % 90 % 10 % 10 % VM tPHL tTLH tTHL GND VOH nY output VOL Table 10. Measurement points Type Input Output VM VI tr = tf VM 74HC2G17 0.5VCC GND to VCC 6.0 ns 0.5VCC 74HCT2G17 1.3 V GND to 3.0 V 6.0 ns 1.3 V |
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