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74HCT123DB Datasheet(PDF) 8 Page - NXP Semiconductors |
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74HCT123DB Datasheet(HTML) 8 Page - NXP Semiconductors |
8 / 25 page 74HC_HCT123 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 8 — 16 December 2011 8 of 25 NXP Semiconductors 74HC123; 74HCT123 Dual retriggerable monostable multivibrator with reset 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 12. Symbol Parameter Conditions 25 C 40 C to +85 C 40 C to +125 C Unit Min Typ Max Min Max Min Max 74HC123 tpd propagation delay nRD, nA, nB to nQ or nQ; CEXT = 0 pF; REXT =5 k; see Figure 9 [1] VCC = 2.0 V - 83 255 - 320 - 385 ns VCC = 4.5 V - 30 51 - 64 - 77 ns VCC = 5 V; CL = 15 pF - 26 - - - - - ns VCC = 6.0 V - 24 43 - 54 - 65 ns nRD (reset) to nQ or nQ; CEXT =0 pF; REXT =5 k; see Figure 9 VCC = 2.0 V - 66 215 - 270 - 325 ns VCC = 4.5 V - 24 43 - 54 - 65 ns VCC = 5 V; CL = 15 pF - 20 - - - - - ns VCC = 6.0 V - 19 37 - 46 - 55 ns tt transition time see Figure 9 [1] 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 tW pulse width nA LOW; see Figure 10 VCC = 2.0 V 100 8 - 125 - 150 - ns VCC = 4.5 V 20 3 - 25 - 30 - ns VCC = 6.0 V 17 2 - 21 - 26 - ns nB HIGH; see Figure 10 VCC = 2.0 V 100 17 - 125 - 150 - ns VCC = 4.5 V 20 6 - 25 - 30 - ns VCC = 6.0 V 17 5 - 21 - 26 - ns nRD LOW; see Figure 11 VCC = 2.0 V 100 14 - 125 - 150 - ns VCC = 4.5 V 20 5 - 25 - 30 - ns VCC = 6.0 V 17 4 - 21 - 26 - ns nQ HIGH and nQ LOW; VCC =5.0 V; see Figure 10 and 11 [2] CEXT = 100 nF; REXT = 10 k -450 - - - - - s CEXT = 0 pF; REXT =5 k -75- - - - - ns |
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