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74HC2G126GD 데이터시트(PDF) 6 Page - NXP Semiconductors |
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74HC2G126GD 데이터시트(HTML) 6 Page - NXP Semiconductors |
6 / 14 page 74HC_HCT2G126_4 © NXP B.V. 2009. All rights reserved. Product data sheet Rev. 04 — 24 September 2009 6 of 14 NXP Semiconductors 74HC2G126; 74HCT2G126 Dual buffer/line driver; 3-state [1] All typical values are measured at Tamb = 25 °C. [2] tpd is the same as tPLH and tPHL. ten is the same as tPZL and tPZH. tdis is the same as tPLZ and tPHZ. tt is the same as tTHL and tTLH. [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 outputs. ten enable time nOE to nY; see Figure 7 [2] VCC = 2.0 V - 40 115 - 135 ns VCC = 4.5 V - 11 23 - 27 ns VCC = 6.0 V - 8 20 - 23 ns tdis disable time nOE to nY; see Figure 7 [2] VCC = 2.0 V - 25 125 - 150 ns VCC = 4.5 V - 12 25 - 30 ns VCC = 6.0 V - 10 21 - 26 ns tt transition time nY; see Figure 6 [2] VCC = 2.0 V - 18 75 - 90 ns VCC = 4.5 V - 6 15 - 18 ns VCC = 6.0 V - 5 13 - 15 ns CPD power dissipation capacitance per buffer; VI = GND to VCC [3] output enabled - 11 - - - pF output disabled - 1 - - - pF 74HCT2G126 tpd propagation delay nA to nY; see Figure 6 [2] VCC = 4.5 V - 15 30 - 36 ns VCC = 5.0 V; CL =15pF - 12 - - - ns ten enable time nOE to nY; see Figure 7; VCC = 4.5 V [2] - 11 31 - 38 ns tdis disable time nOE to nY; see Figure 7; VCC = 4.5 V [2] - 11 35 - 42 ns tt transition time nY; see Figure 6; VCC = 4.5 V [2] - 6 15 - 18 ns CPD power dissipation capacitance per buffer; VI = GND to VCC − 1.5 V [3] output enabled - 11 - - - pF output disabled - 1 - - - pF Table 8. Dynamic characteristics …continued Voltages are referenced to GND (ground = 0 V); CL = 50 pF unless otherwise specified; for test circuit see Figure 8. Symbol Parameter Conditions Tamb = −40 °C to +85 °C Tamb = −40 °C to +125 °C Unit Min Typ[1] Max Min Max |
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