octal bus transceiver the mc74vhc245 is an advanced high speed cmos octal bus transceiver fabricated with silicon gate cmos technology. it achieves high speed operation similar to equivalent bipolar schottky ttl while maintaining cmos low power dissipation. it is intended for twoway asynchronous communication between data buses. the direction of data transmission is determined by the level of the dir input. the output enable pin (oe ) can be used to disable the device, so that the buses are effectively isolated. all inputs are equipped with protection circuits against static discharge. ? high speed: t pd = 4.0ns (typ) at v cc = 5v ? low power dissipation: i cc = 4 m a (max) at t a = 25 c ? high noise immunity: v nih = v nil = 28% v cc ? power down protection provided on inputs ? balanced propagation delays ? designed for 2v to 5.5v operating range ? low noise: v olp = 1.2v (max) ? pin and function compatible with other standard logic families ? latchup performance exceeds 300ma ? esd performance: hbm > 2000v; machine model > 200v ? chip complexity: 308 fets or 77 equivalent gates application notes ? do not force a signal on an i/o pin when it is an active output, damage may occur. ? all floating (high impedance) input or i/o pins must be fixed by means of pull up or pull down resistors or bus terminator ics. ? a parasitic diode is formed between the bus and v cc terminals. therefore, the vhc245 cannot be used to interface 5v to 3v systems directly. on semiconductor ? semiconductor components industries, llc, 2001 march, 2001 rev. 4 1 publication order number: mc74vhc245/d mc74vhc245 dw suffix 20lead soic wide package case 751d05 ordering information mc74vhcxxxdw mc74vhcxxxdt mc74vhcxxxm soic wide tssop soic eiaj dt suffix 20lead tssop package case 948e02 m suffix 20lead soic eiaj package case 96701
mc74vhc245 http://onsemi.com 2 figure 1. logic diagram a data port a8 a7 a6 a5 a3 a4 a2 a1 9 8 7 6 5 4 3 2 dir oe 1 19 18 17 16 15 14 13 12 11 b1 b2 b3 b4 b5 b6 b7 b8 b data port figure 2. pin assignment a5 a3 a2 a1 dir gnd a8 a7 a6 a4 5 4 3 2 1 10 9 8 7 6 14 15 16 17 18 19 20 11 12 13 b3 b2 b1 oe v cc b8 b7 b6 b5 b4 function table control inputs oe dir operation l l data transmitted from bus b to bus a l h data transmitted from bus a to bus b h x buses isolated (highimpedance state)
mc74vhc245 http://onsemi.com 3 ??????????????????????? ??????????????????????? maximum ratings* ???? ???? symbol ?????????????? ?????????????? parameter ????? ????? value ??? ??? unit ???? ???? v cc ?????????????? ?????????????? dc supply voltage ????? ????? 0.5 to + 7.0 ??? ??? v ???? ???? v in ?????????????? ?????????????? dc input voltage ????? ????? 0.5 to + 7.0 ??? ??? v ???? ???? v out ?????????????? ?????????????? dc output voltage ????? ????? 0.5 to v cc + 0.5 ??? ??? v ???? ???? i ik ?????????????? ?????????????? input diode current ????? ????? 20 ??? ??? ma ???? ???? i ok ?????????????? ?????????????? output diode current ????? ????? 20 ??? ??? ma ???? ???? i out ?????????????? ?????????????? dc output current, per pin ????? ????? 25 ??? ??? ma ???? ???? i cc ?????????????? ?????????????? dc supply current, v cc and gnd pins ????? ????? 75 ??? ??? ma ???? ? ?? ? ???? p d ?????????????? ? ???????????? ? ?????????????? power dissipation in still air soic packages2 tssop package2 ????? ? ??? ? ????? 500 450 ??? ? ? ? ??? mw ???? ???? t stg ?????????????? ?????????????? storage temperature ????? ????? 65 to + 150 ??? ??? c * absolute maximum continuous ratings are those values beyond which damage to the device may occur. exposure to these conditions or conditions beyond those indicated may adversely affect device reliability. functional operation under absolutemaximumrated conditions is not implied. 2derating e soic packages: 7 mw/ c from 65 to 125 c tssop package: 6.1 mw/ c from 65 to 125 c recommended operating conditions ???? ???? symbol ??????????????? ??????????????? parameter ??? ??? min ?? ?? max ??? ??? unit ???? ???? v cc ??????????????? ??????????????? dc supply voltage ??? ??? 2.0 ?? ?? 5.5 ??? ??? v ???? ???? v in ??????????????? ??????????????? dc input voltage ??? ??? 0 ?? ?? 5.5 ??? ??? v ???? ???? v out ??????????????? ??????????????? dc output voltage ??? ??? 0 ?? ?? v cc ??? ??? v ???? ???? t a ??????????????? ??????????????? operating temperature ??? ??? 40 ?? ?? + 85 ??? ??? c ???? ? ?? ? ???? t r , t f ??????????????? ? ????????????? ? ??????????????? input rise and fall time v cc = 3.3v 0.3v v cc =5.0v 0.5v ??? ? ? ? ??? 0 0 ?? ?? ?? 100 20 ??? ? ? ? ??? ns/v ????????????????????????????????? ????????????????????????????????? dc electrical characteristics ???? ???? ??????? ??????? ??????? ??????? ??? ??? v cc ????????? ????????? t a = 25 c ??????? ??????? t a = 40 to 85 c ?? ?? ???? ???? symbol ??????? ??????? parameter ??????? ??????? test conditions ??? ??? v cc v ???? ???? min ??? ??? typ ???? ???? max ???? ???? min ???? ???? max ?? ?? unit ???? ? ?? ? ???? v ih ??????? ? ????? ? ??????? minimum highlevel input voltage ??????? ? ????? ? ??????? ??? ? ? ? ??? 2.0 3.0 to 5.5 ???? ? ?? ? ???? 1.50 v cc x 0.7 ??? ? ? ? ??? ???? ? ?? ? ???? ???? ? ?? ? ???? 1.50 v cc x 0.7 ???? ? ?? ? ???? ?? ?? ?? v ???? ? ?? ? ???? v il ??????? ? ????? ? ??????? maximum lowlevel input voltage ??????? ? ????? ? ??????? ??? ? ? ? ??? 2.0 3.0 to 5.5 ???? ? ?? ? ???? ??? ? ? ? ??? ???? ? ?? ? ???? 0.50 v cc x 0.3 ???? ? ?? ? ???? ???? ? ?? ? ???? 0.50 v cc x 0.3 ?? ?? ?? v ???? ? ?? ? ???? v oh ??????? ? ????? ? ??????? minimum highlevel output voltage ??????? ? ????? ? ??????? v in = v ih or v il i oh = 50 m a ??? ? ? ? ??? 2.0 3.0 4.5 ???? ? ?? ? ???? 1.9 2.9 4.4 ??? ? ? ? ??? 2.0 3.0 4.5 ???? ? ?? ? ???? ???? ? ?? ? ???? 1.9 2.9 4.4 ???? ? ?? ? ???? ?? ?? ?? v ???? ? ?? ? ? ?? ? ???? ??????? ? ????? ? ? ????? ? ??????? ??????? ? ????? ? ? ????? ? ??????? v in = v ih or v il i oh = 4ma i oh = 8ma ??? ? ? ? ? ? ? ??? 3.0 4.5 ???? ? ?? ? ? ?? ? ???? 2.58 3.94 ??? ? ? ? ? ? ? ??? ???? ? ?? ? ? ?? ? ???? ???? ? ?? ? ? ?? ? ???? 2.48 3.80 ???? ? ?? ? ? ?? ? ???? ?? ?? ?? ?? ???? ? ?? ? ???? v ol ??????? ? ????? ? ??????? maximum lowlevel output voltage ??????? ? ????? ? ??????? v in = v ih or v il i ol = 50 m a ??? ? ? ? ??? 2.0 3.0 4.5 ???? ? ?? ? ???? ??? ? ? ? ??? 0.0 0.0 0.0 ???? ? ?? ? ???? 0.1 0.1 0.1 ???? ? ?? ? ???? ???? ? ?? ? ???? 0.1 0.1 0.1 ?? ?? ?? v ???? ? ?? ? ???? ??????? ? ????? ? ??????? ??????? ? ????? ? ??????? v in = v ih or v il i ol = 4ma i ol = 8ma ??? ? ? ? ??? 3.0 4.5 ???? ? ?? ? ???? ??? ? ? ? ??? ???? ? ?? ? ???? 0.36 0.36 ???? ? ?? ? ???? ???? ? ?? ? ???? 0.44 0.44 ?? ?? ?? ???? ? ?? ? ???? i in ??????? ? ????? ? ??????? maximum input leakage current ??????? ? ????? ? ??????? v in = 5.5 v or gnd (dir, oe ) ??? ? ? ? ??? 0 to 5.5 ???? ? ?? ? ???? ??? ? ? ? ??? ???? ? ?? ? ???? 0.1 ???? ? ?? ? ???? ???? ? ?? ? ???? 1.0 ?? ?? ?? m a this device contains protection circuitry to guard against damage due to high static voltages or electric fields. however, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages to this highimpedance cir- cuit. for proper operation, v in and v out should be constrained to the range gnd (v in or v out ) v cc . unused inputs must always be tied to an appropriate logic voltage level (e.g., either gnd or v cc ). unused outputs must be left open.
mc74vhc245 http://onsemi.com 4 ????????????????????????????????? ????????????????????????????????? dc electrical characteristics ?? ?? unit ??????? ??????? t a = 40 to 85 c ????????? ????????? t a = 25 c ??? ??? v cc v ??????? ??????? test conditions ??????? ??????? parameter ???? ???? symbol ?? ?? unit ???? ???? max ???? ???? min ???? ???? max ??? ??? typ ???? ???? min ??? ??? v cc v ??????? ??????? test conditions ??????? ??????? parameter ???? ???? symbol ???? ? ?? ? ???? i oz ??????? ? ????? ? ??????? maximum threestate leakage current ??????? ? ????? ? ??????? v in = v il or v ih v out = v cc or gnd ??? ? ? ? ??? 5.5 ???? ? ?? ? ???? ??? ? ? ? ??? ???? ? ?? ? ???? 0.25 ???? ? ?? ? ???? ???? ? ?? ? ???? 2.5 ?? ?? ?? m a ???? ? ?? ? ???? i cc ??????? ? ????? ? ??????? maximum quiescent supply current ??????? ? ????? ? ??????? v in = v cc or gnd ??? ? ? ? ??? 5.5 ???? ? ?? ? ???? ??? ? ? ? ??? ???? ? ?? ? ???? 4.0 ???? ? ?? ? ???? ???? ? ?? ? ???? 40.0 ?? ?? ?? m a ????????????????????????????????? ac electrical characteristics (input t r = t f = 3.0ns) ???? ???? ????????? ????????? ???????? ???????? ????????? ????????? t a = 25 c ?????? ?????? t a = 40 to 85 c ?? ?? ???? ???? symbol ????????? ????????? parameter ???????? ???????? test conditions ???? ???? min ??? ??? typ ???? ???? max ??? ??? min ???? ???? max ?? ?? unit ???? ? ?? ? ???? t plh , t phl ????????? ? ??????? ? ????????? maximum propagation delay, a to b or b to a ???????? ? ?????? ? ???????? v cc = 3.3 0.3v c l = 15pf c l = 50pf ???? ? ?? ? ???? ??? ? ? ? ??? 5.8 8.3 ???? ? ?? ? ???? 8.4 11.9 ??? ? ? ? ??? 1.0 1.0 ???? ? ?? ? ???? 10.0 13.5 ?? ?? ?? ns ???? ? ?? ? ???? ????????? ? ??????? ? ????????? ???????? ? ?????? ? ???????? v cc = 5.0 0.5v c l = 15pf c l = 50pf ???? ? ?? ? ???? ??? ? ? ? ??? 4.0 5.5 ???? ? ?? ? ???? 5.5 7.5 ??? ? ? ? ??? 1.0 1.0 ???? ? ?? ? ???? 6.5 8.5 ?? ?? ?? ???? ? ?? ? ???? t pzl , t pzh ????????? ? ??????? ? ????????? output enable time oe to a or b ???????? ? ?????? ? ???????? v cc = 3.3 0.3v c l = 15pf r l = 1 k w c l = 50pf ???? ? ?? ? ???? ??? ? ? ? ??? 8.5 11.0 ???? ? ?? ? ???? 13.2 16.7 ??? ? ? ? ??? 1.0 1.0 ???? ? ?? ? ???? 15.5 19.0 ?? ?? ?? ns ???? ???? ????????? ????????? ???????? ???????? v cc = 5.0 0.5v c l = 15pf r l = 1 k w c l = 50pf ???? ???? ??? ??? 5.8 7.3 ???? ???? 8.5 10.6 ??? ??? 1.0 1.0 ???? ???? 10.0 12.0 ?? ?? ???? ? ?? ? ???? t plz , t phz ????????? ? ??????? ? ????????? output disable time oe to a or b ???????? ? ?????? ? ???????? v cc = 3.3 0.3v c l = 50pf r l = 1 k w ???? ? ?? ? ???? ??? ? ? ? ??? 11.5 ???? ? ?? ? ???? 15.8 ??? ? ? ? ??? 1.0 ???? ? ?? ? ???? 18.0 ?? ?? ?? ns ???? ? ?? ? ???? ????????? ? ??????? ? ????????? ???????? ? ?????? ? ???????? v cc = 5.0 0.5v c l = 50pf r l = 1 k w ???? ? ?? ? ???? ??? ? ? ? ??? 7.0 ???? ? ?? ? ???? 9.7 ??? ? ? ? ??? 1.0 ???? ? ?? ? ???? 11.0 ?? ?? ?? ???? ???? t oslh , t oshl ????????? ????????? output to output skew ???????? ???????? v cc = 3.3 0.3v c l = 50pf (note 1.) ???? ???? ??? ??? ???? ???? 1.5 ??? ??? ???? ???? 1.5 ?? ?? ns ???? ? ?? ? ???? ????????? ? ??????? ? ????????? ???????? ? ?????? ? ???????? v cc = 5.0 0.5v c l = 50pf (note 1.) ???? ? ?? ? ???? ??? ? ? ? ??? ???? ? ?? ? ???? 1.0 ??? ? ? ? ??? ???? ? ?? ? ???? 1.0 ?? ?? ?? ns ???? ? ?? ? ???? c in ????????? ? ??????? ? ????????? maximum input capacitance dir, oe ???????? ? ?????? ? ???????? ???? ? ?? ? ???? ??? ? ? ? ??? 4 ???? ? ?? ? ???? 10 ??? ? ? ? ??? ???? ? ?? ? ???? 10 ?? ?? ?? pf ???? ???? c i/o ????????? ????????? maximum threestate i/o capacitance ???????? ???????? ???? ???? ??? ??? 8 ???? ???? ??? ??? ???? ???? ?? ?? pf typical @ 25 c, v cc = 5.0v c pd power dissipation capacitance (note 2.) 21 pf 1. parameter guaranteed by design. t oslh = |t plhm t plhn |, t oshl = |t phlm t phln |. 2. c pd is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption with out load. average operating current can be obtained by the equation: i cc(opr ) = c pd v cc f in + i cc / 8 (per bit). c pd is used to determine the noload dynamic power consumption; p d = c pd v cc 2 f in + i cc v cc . noise characteristics (input t r = t f = 3.0ns, c l = 50pf, v cc = 5.0v) t a = 25 c symbol parameter typ max unit v olp quiet output maximum dynamic v ol 0.9 1.2 v v olv quiet output minimum dynamic v ol 0.9 1.2 v v ihd minimum high level dynamic input voltage 3.5 v v ild maximum low level dynamic input voltage 1.5 v
mc74vhc245 http://onsemi.com 5 switching waveforms v cc gnd a or b b or a 50% 50% v cc t plh t phl figure 3. oe a or b a or b 50% v cc 50% v cc 50% v cc t pzl t plz t pzh t phz v cc gnd high impedance v ol +0.3v v oh -0.3v high impedance v cc gnd 50% figure 4. dir 50% v cc test circuits *includes all probe and jig capacitance c l * test point device under test output figure 5. *includes all probe and jig capacitance c l * test point device under test output figure 6. connect to v cc when testing t plz and t pzl . connect to gnd when testing t phz and t pzh . 1 k w
mc74vhc245 http://onsemi.com 6 figure 7. expanded logic diagram oe dir a1 a2 a3 a4 a5 a6 a7 a8 2 3 4 5 6 7 8 9 19 1 b1 b2 b3 b4 b5 b6 b7 b8 18 17 16 15 14 13 12 11 figure 8. input equivalent circuit input figure 9. bus terminal equivalent circuit dir, oe i/o a, b
mc74vhc245 http://onsemi.com 7 outline dimensions case 751d05 issue f dw suffix 20 1 11 10 b 20x h 10x c l 18x a1 a seating plane h x 45 e d m 0.25 m b m 0.25 s a s b t e t b a dim min max millimeters a 2.35 2.65 a1 0.10 0.25 b 0.35 0.49 c 0.23 0.32 d 12.65 12.95 e 7.40 7.60 e 1.27 bsc h 10.05 10.55 h 0.25 0.75 l 0.50 0.90 0 7 notes: 1. dimensions are in millimeters. 2. interpret dimensions and tolerances per asme y14.5m, 1994. 3. dimensions d and e do not include mold protrusion. 4. maximum mold protrusion 0.15 per side. 5. dimension b does not include dambar protrusion. allowable protrusion shall be 0.13 total in excess of b dimension at maximum material condition. soic case 948e02 issue a tssop dim a min max min max inches 6.60 0.260 millimeters b 4.30 4.50 0.169 0.177 c 1.20 0.047 d 0.05 0.15 0.002 0.006 f 0.50 0.75 0.020 0.030 g 0.65 bsc 0.026 bsc h 0.27 0.37 0.011 0.015 j 0.09 0.20 0.004 0.008 j1 0.09 0.16 0.004 0.006 k 0.19 0.30 0.007 0.012 k1 0.19 0.25 0.007 0.010 l 6.40 bsc 0.252 bsc m 0 8 0 8 notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. dimension a does not include mold flash, protrusions or gate burrs. mold flash or gate burrs shall not exceed 0.15 (0.006) per side. 4. dimension b does not include interlead flash or protrusion. interlead flash or protrusion shall not exceed 0.25 (0.010) per side. 5. dimension k does not include dambar protrusion. allowable dambar protrusion shall be 0.08 (0.003) total in excess of the k dimension at maximum material condition. 6. terminal numbers are shown for reference only. 7. dimension a and b are to be determined at datum plane -w-. 110 11 20 pin 1 ident a b t 0.100 (0.004) c d g h section nn k k1 jj1 n n m f w seating plane v u s u m 0.10 (0.004) v s t 20x ref k l l/2 2x s u 0.15 (0.006) t detail e 0.25 (0.010) detail e 6.40 0.252 --- --- s u 0.15 (0.006) t dt suffix
mc74vhc245 http://onsemi.com 8 case 96701 issue o m suffix dim min max min max inches --- 2.05 --- 0.081 millimeters 0.05 0.20 0.002 0.008 0.35 0.50 0.014 0.020 0.18 0.27 0.007 0.011 12.35 12.80 0.486 0.504 5.10 5.45 0.201 0.215 1.27 bsc 0.050 bsc 7.40 8.20 0.291 0.323 0.50 0.85 0.020 0.033 1.10 1.50 0.043 0.059 0 0.70 0.90 0.028 0.035 --- 0.81 --- 0.032 a 1 h e q 1 l e 10 0 10 notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. dimensions d and e do not include mold flash or protrusions and are measured at the parting line. mold flash or protrusions shall not exceed 0.15 (0.006) per side. 4. terminal numbers are shown for reference only. 5. the lead width dimension (b) does not include dambar protrusion. allowable dambar protrusion shall be 0.08 (0.003) total in excess of the lead width dimension at maximum material condition. dambar cannot be located on the lower radius or the foot. minimum space between protrusions and adjacent lead to be 0.46 ( 0.018). h e a 1 l e q 1 c a z d e 20 110 11 b m 0.13 (0.005) e 0.10 (0.004) view p detail p m l a b c d e e l m z soic eiaj on semiconductor and are trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to make changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. atypicalo parameters which may be provided in scill c data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. all operating parameters, including atypicalso must be validated for each customer application by customer's technical experts. scillc does not convey any license under its patent rights nor the rights of others. scillc products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body , or other applications intended to support or sustain life, or for any other application in which the failure of the scillc product could create a sit uation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hold scillc and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthori zed use, even if such claim alleges that scillc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employer. publication ordering information central/south america: spanish phone : 3033087143 (monfri 8:00am to 5:00pm mst) email : onlitspanish@hibbertco.com tollfree from mexico: dial 018002882872 for access then dial 8662979322 asia/pacific : ldc for on semiconductor asia support phone : 13036752121 (tuefri 9:00am to 1:00pm, hong kong time) toll free from hong kong & singapore: 00180044223781 email : onlitasia@hibbertco.com japan : on semiconductor, japan customer focus center 4321 nishigotanda, shinagawaku, tokyo, japan 1410031 phone : 81357402700 email : r14525@onsemi.com on semiconductor website : http://onsemi.com for additional information, please contact your local sales representative. mc74vhc245/d north america literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone : 3036752175 or 8003443860 toll free usa/canada fax : 3036752176 or 8003443867 toll free usa/canada email : onlit@hibbertco.com fax response line: 3036752167 or 8003443810 toll free usa/canada n. american technical support : 8002829855 toll free usa/canada europe: ldc for on semiconductor european support german phone : (+1) 3033087140 (monfri 2:30pm to 7:00pm cet) email : onlitgerman@hibbertco.com french phone : (+1) 3033087141 (monfri 2:00pm to 7:00pm cet) email : onlitfrench@hibbertco.com english phone : (+1) 3033087142 (monfri 12:00pm to 5:00pm gmt) email : onlit@hibbertco.com european tollfree access*: 0080044223781 *available from germany, france, italy, uk, ireland
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