Moteur de recherche de fiches techniques de composants électroniques |
|
74VHC_VHCT244 Fiches technique(PDF) 8 Page - NXP Semiconductors |
|
74VHC_VHCT244 Fiches technique(HTML) 8 Page - NXP Semiconductors |
8 / 16 page 74VHC_VHCT244_1 © NXP B.V. 2009. All rights reserved. Product data sheet Rev. 01 — 17 August 2009 8 of 16 NXP Semiconductors 74VHC244; 74VHCT244 Octal buffer/line driver; 3-state [1] Typical values are measured at nominal supply voltage (VCC = 3.3 V and VCC = 5.0 V). [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. [3] CPD is used to determine the dynamic power dissipation PD (µW). PD =CPD × VCC2 × fi + ∑ (CL × VCC2 × fo) where: fi = input frequency in MHz; fo = output frequency in MHz; CL = output load capacitance in pF; VCC = supply voltage in Volts. 11. Waveforms For type 74VHCT244 tpd propagation delay nAn to nYn; see Figure 6 [2] VCC = 4.5 V to 5.5 V CL = 15 pF - 3.5 7.4 1.0 8.5 1.0 9.5 ns CL = 50 pF - 5.0 8.4 1.0 9.5 1.0 10.5 ns ten enable time nOE to nYn; see Figure 7 VCC = 4.5 V to 5.5 V CL = 15 pF - 3.5 10.4 1.0 12.0 1.0 13.0 ns CL = 50 pF - 5.5 11.4 1.0 13.0 1.0 14.5 ns tdis disable time nOE to nYn; see Figure 7 [2] VCC = 4.5 V to 5.5 V CL = 15 pF - 5.0 9.4 1.0 10.0 1.0 12.0 ns CL = 50 pF - 7.0 11.4 1.0 13.0 1.0 14.5 ns CPD power dissipation capacitance per buffer; CL =50pF;f=1 MHz; VI = GND to VCC [3] -12 - - - - - pF Table 7. Dynamic characteristics …continued GND = 0 V. For test circuit see Figure 8. Symbol Parameter Conditions 25 °C −40 °C to +85 °C −40 °C to +125 °C Unit Min Typ[1] Max Min Max Min Max Measurement points are given in Table 8. VOL and VOH are typical voltage output levels that occur with the output load. Fig 6. Propagation delay input (nAn) to output (nYn) mna171 nAn input nYn output tPLH tPHL GND VI VM VM VM VM VOH VOL |
Numéro de pièce similaire - 74VHC_VHCT244_15 |
|
Description similaire - 74VHC_VHCT244_15 |
|
|
Lien URL |
Politique de confidentialité |
ALLDATASHEET.FR |
ALLDATASHEET vous a-t-il été utile ? [ DONATE ] |
À propos de Alldatasheet | Publicité | Contactez-nous | Politique de confidentialité | Echange de liens | Fabricants All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |