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74HCT157 Arkusz danych(PDF) 7 Page - NXP Semiconductors |
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74HCT157 Arkusz danych(HTML) 7 Page - NXP Semiconductors |
7 / 18 page 74HC_HCT157 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2010. All rights reserved. Product data sheet Rev. 3 — 31 December 2010 7 of 18 NXP Semiconductors 74HC157; 74HCT157 Quad 2-input multiplexer 10. Dynamic characteristics Table 7. Dynamic characteristics Voltages are referenced to GND (ground = 0 V); CL = 50 pF unless otherwise specified; for test circuit see 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 For type 74HC157 tpd propagation delay nI0, nI1 to nY; see Figure 7 [1] VCC = 2.0 V - 36 125 - 155 - 190 ns VCC = 4.5 V - 13 25 - 31 - 38 ns VCC =5V; CL =15pF - 11 - - - - - ns VCC = 6.0 V - 10 21 - 26 - 32 ns S to nY; see Figure 7 [1] VCC = 2.0 V - 41 125 - 155 - 190 ns VCC = 4.5 V - 15 25 - 31 - 38 ns VCC =5V; CL =15pF - 12 - - - - - ns VCC = 6.0 V - 12 21 - 26 - 32 ns E to nY; see Figure 8 [1] VCC = 2.0 V - 39 115 - 145 - 175 ns VCC = 4.5 V - 14 23 - 29 - 35 ns VCC =5V; CL =15pF - 11 - - - - - ns VCC = 6.0 V - 11 20 - 25 - 30 ns tt transition time nY; see Figure 7 [2] VCC = 2.0 V - 19 75 - 95 - 110 ns VCC = 4.5 V - 7 15 - 19 - 22 ns VCC = 6.0 V - 6 13 - 16 - 19 ns CPD power dissipation capacitance CL =50pF;f= 1 MHz; VI =GND to VCC [3] -70 - - - - - pF For type 74HCT157 tpd propagation delay nI0, nI1 to nY; see Figure 7 [1] VCC = 4.5 V - 16 27 - 34 - 41 ns VCC =5V; CL =15pF - 13 - - - - - ns S to nY; see Figure 7 [1] VCC = 4.5 V - 22 37 - 46 - 56 ns VCC =5V; CL =15pF - 19 - - - - - ns E to nY; see Figure 8 [1] VCC = 4.5 V - 15 26 - 33 - 39 ns VCC =5V; CL =15pF - 12 - - - - - ns |
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