mc74vhc138 3-to-8 line decoder the mc74vhc138 is an advanced high speed cmos 3to8 decoder fabricated with silicon gate cmos technology. it achieves high speed operation similar to equivalent bipolar schottky ttl while maintaining cmos low power dissipation. when the device is enabled, three binary select inputs (a0 a2) determine which one of the outputs (y0 y7 ) will go low. when enable input e3 is held low or either e2 or e1 is held high, decoding function is inhibited and all outputs go high. e3, e2 , and e1 inputs are provided to ease cascade connection and for use as an address decoder for memory systems. the internal circuit is composed of three stages, including a buffer output which provides high noise immunity and stable output. the inputs tolerate voltages up to 7v, allowing the interface of 5v systems to 3v systems. ? high speed: t pd = 5.7ns (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 = 0.8 v (max) ? pin and function compatible with other standard logic families ? latchup performance exceeds 300ma ? esd performance: hbm > 2000v; machine model > 200v ? chip complexity: 122 fets or 30.5 equivalent gates ? semiconductor components industries, llc, 2001 march, 2001 rev. 3 1 publication order number: mc74vhc138/d device package shipping ordering information mc74vhc138d soic16 48 units/rail mc74vhc138dr2 soic16 http://onsemi.com 2500 units/reel soic16 d suffix case 751b tssop16 dt suffix case 948f soic eiaj16 m suffix case 966 marking diagrams 1 8 9 16 1 8 16 9 1 16 9 8 vhc138 awlyyww a = assembly location wl = wafer lot yy = year ww = work week vhc 138 awlyww vhc138 alyw mc74vhc138dt tssop16 96 units/rail mc74vhc138dtr2 tssop16 2500 units/reel mc74vhc138m soic eiaj16 48 units/rail mc74vhc138mel soic eiaj16 2000 units/reel a = assembly location l = wafer lot y = year w = work week a = assembly location wl = wafer lot y = year ww = work week
mc74vhc138 http://onsemi.com 2 pin assignment 13 14 15 16 9 10 11 12 5 4 3 2 1 8 7 6 a0 e1 a2 a1 y7 e3 e2 gnd y3 y2 y1 y0 v cc y5 y4 y6 7 y6 y5 y4 y3 y2 y1 y0 y7 9 10 11 12 13 14 15 3 2 1 e3 e2 a0 a1 a2 active-low outputs select inputs e1 enable inputs 4 5 6 inputs outputs e3 e2 e1 a2 a1 a0 y0 y1 y2 y3 y4 y5 y6 y7 x x h xxxhhhhhhhh x h x xxxhhhhhhhh l x x xxxhhhhhhhh h l l lll lhhhhhhh h l l llhhlhhhhhh h l l lhlhhlhhhhh h l l lhhhhhlhhhh h l l hllhhhhlhhh h l l hlhhhhhhlhh h l l hhlhhhhhhlh h l l hhhhhhhhhhl function table h = high level (steady state); l = low level (steady state); x = don't care logic diagram
mc74vhc138 http://onsemi.com 3 a0 a1 a2 e2 e1 e3 1 2 3 4 5 6 15 14 13 12 11 10 9 7 y1 y2 y3 y4 y5 y6 y7 y0 expanded logic diagram 15 iec logic diagram y0 y1 y2 y3 y4 y5 y6 y7 14 13 12 11 10 9 7 4 5 6 3 2 1 a0 a1 a2 e3 e2 e1 2 1 4 bin/oct 1 0 2 4 3 5 6 7 en & 15 y0 y1 y2 y3 y4 y5 y6 y7 14 13 12 11 10 9 7 4 5 6 3 2 1 a0 a1 a2 e3 e2 e1 0 2 dmux 1 0 2 4 3 5 6 7 & g 0 7
mc74vhc138 http://onsemi.com 4 ??????????????????????? ??????????????????????? 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 ??? ??? 55 ?? ?? + 125 ??? ??? 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 the ja of the package is equal to 1/derating. higher junction temperatures may affect the expected lifetime of the device per the ta ble and figure below. device junction temperature versus time to 0.1% bond failures junction temperature c time, hours time, years 80 1,032,200 117.8 90 419,300 47.9 100 178,700 20.4 110 79,600 9.4 120 37,000 4.2 130 17,800 2.0 140 8,900 1.0 1 1 10 100 1000 time, years normalized failure rate t j = 80 c t j = 90 c t j = 100 c t j = 110 c t j = 130 c t j = 120 c failure rate of plastic = ceramic until intermetallics occur figure 1. failure rate vs. time junction temperature 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.
mc74vhc138 http://onsemi.com 5 ????????????????????????????????? ????????????????????????????????? dc electrical characteristics ???? ???? ?????? ?????? ?????? ?????? ??? ??? v cc ???????? ???????? t a = 25 c ????? ????? t a = 85 c ?????? ?????? t a = 125 c ?? ?? ???? ???? symbol ?????? ?????? parameter ?????? ?????? test conditions ??? ??? v cc (v) ??? ??? min ???? ???? typ ??? ??? max ??? ??? min ??? ??? max ???? ???? min ??? ??? max ?? ?? unit ???? ? ?? ? ? ?? ? ???? v ih ?????? ? ???? ? ? ???? ? ?????? minimum highlevel input voltage ?????? ? ???? ? ? ???? ? ?????? ??? ? ? ? ? ? ? ??? 2.0 3.0 4.5 5.5 ??? ? ? ? ? ? ? ??? 1.5 2.1 3.15 3.85 ???? ? ?? ? ? ?? ? ???? ??? ? ? ? ? ? ? ??? ??? ? ? ? ? ? ? ??? 1.5 2.1 3.15 3.85 ??? ? ? ? ? ? ? ??? ???? ? ?? ? ? ?? ? ???? 1.5 2.1 3.15 3.85 ??? ?? ? ?? ? ??? ?? ?? ?? ?? v ???? ? ?? ? ? ?? ? ???? v il ?????? ? ???? ? ? ???? ? ?????? maximum lowlevel input voltage ?????? ? ???? ? ? ???? ? ?????? ??? ? ? ? ? ? ? ??? 2.0 3.0 4.5 5.5 ??? ? ? ? ? ? ? ??? ???? ? ?? ? ? ?? ? ???? ??? ? ? ? ? ? ? ??? 0.5 0.9 1.35 1.65 ??? ? ? ? ? ? ? ??? ??? ? ? ? ? ? ? ??? 0.5 0.9 1.35 1.65 ???? ? ?? ? ? ?? ? ???? ??? ?? ? ?? ? ??? 0.5 0.9 1.35 1.65 ?? ?? ?? ?? v ???? ? ?? ? ???? v oh ?????? ? ???? ? ?????? minimum highlevel output voltage v in = v ih or v il ?????? ? ???? ? ?????? 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 ??? ? ? ? ??? ???? ? ?? ? ???? 1.9 2.9 4.4 ??? ?? ? ??? ?? ?? ?? v ???? ? ?? ? ???? ?????? ? ???? ? ?????? ?????? ? ???? ? ?????? v in = v ih or v il i oh = 4 ma i oh = 8 ma ??? ? ? ? ??? 3.0 4.5 ??? ? ? ? ??? 2.58 3.94 ???? ? ?? ? ???? ??? ? ? ? ??? ??? ? ? ? ??? 2.48 3.80 ??? ? ? ? ??? ???? ? ?? ? ???? 2.34 3.66 ??? ?? ? ??? ?? ?? ?? ???? ? ?? ? ? ?? ? ???? v ol ?????? ? ???? ? ? ???? ? ?????? maximum lowlevel output voltage v v or v ?????? ? ???? ? ? ???? ? ?????? 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 ???? ? ?? ? ? ?? ? ???? ??? ?? ? ?? ? ??? 0.1 0.1 0.1 ?? ?? ?? ?? v ???? ? ?? ? ???? ?????? ? ???? ? ?????? v in = v ih or v il ?????? ? ???? ? ?????? v in = v ih or v il i ol = 4 ma i ol = 8 ma ??? ? ? ? ??? 3.0 4.5 ??? ? ? ? ??? ???? ? ?? ? ???? ??? ? ? ? ??? 0.36 0.36 ??? ? ? ? ??? ??? ? ? ? ??? 0.44 0.44 ???? ? ?? ? ???? ??? ?? ? ??? 0.52 0.52 ?? ?? ?? ???? ? ?? ? ???? i in ?????? ? ???? ? ?????? maximum input leakage current ?????? ? ???? ? ?????? v in = 5.5 v or gnd ??? ? ? ? ??? 0 to 5.5 ??? ? ? ? ??? ???? ? ?? ? ???? ??? ? ? ? ??? 0.1 ??? ? ? ? ??? ??? ? ? ? ??? 1.0 ???? ? ?? ? ???? ??? ?? ? ??? 1.0 ?? ?? ?? m a ???? ???? i cc ?????? ?????? maximum quiescent supply current ?????? ?????? v in = v cc or gnd ??? ??? 5.5 ??? ??? ???? ???? ??? ??? 4.0 ??? ??? ??? ??? 40.0 ???? ???? ??? ??? 40.0 ?? ?? m a ????????????????????????????????? ????????????????????????????????? ac electrical characteristics (input t r = t f = 3.0ns) ???? ? ?? ? ???? symbo ?????? ? ???? ? ?????? ????????? ? ??????? ? ????????? ??????? ? ????? ? ??????? t a = 25 c ????? ? ??? ? ????? t a = 40 to 85 c ?????? ? ???? ? ?????? t a = 55 to 125 c ?? ?? ?? ???? ???? symbo l ?????? ?????? parameter ????????? ????????? test conditions ??? ??? min ??? ??? typ ??? ??? max ??? ??? min ??? ??? max ???? ???? min ??? ??? max ?? ?? unit ???? ???? t plh , t phl ?????? ?????? maximum propagation delay, atoy ????????? ????????? v cc = 3.3 0.3v c l = 15pf c l = 50pf ??? ??? ??? ??? 8.2 10.0 ??? ??? 11.4 15.8 ??? ??? 1.0 1.0 ??? ??? 13.5 18.0 ???? ???? 1.0 1.0 ??? ??? 13.5 18.0 ?? ?? ns ???? ? ?? ? ???? ?????? ? ???? ? ?????? a to y ????????? ? ??????? ? ????????? v cc = 5.0 0.5v c l = 15pf c l = 50pf ??? ? ? ? ??? ??? ? ? ? ??? 5.7 7.2 ??? ? ? ? ??? 8.1 10.1 ??? ? ? ? ??? 1.0 1.0 ??? ? ? ? ??? 9.5 11.5 ???? ? ?? ? ???? 1.0 1.0 ??? ? ? ? ??? 9.5 11.5 ?? ?? ?? ???? ? ?? ? ???? t plh , t phl ?????? ? ???? ? ?????? maximum propagation delay, e3 to y ????????? ? ??????? ? ????????? v cc = 3.3 0.3v c l = 15pf c l = 50pf ??? ? ? ? ??? ??? ? ? ? ??? 8.1 10.6 ??? ? ? ? ??? 12.8 16.3 ??? ? ? ? ??? 1.0 1.0 ??? ? ? ? ??? 15.0 18.5 ???? ? ?? ? ???? 1.0 1.0 ??? ? ? ? ??? 15.0 18.5 ?? ?? ?? ns ???? ???? ?????? ?????? e3 to y ????????? ????????? v cc = 5.0 0.5v c l = 15pf c l = 50pf ??? ??? ??? ??? 5.6 7.1 ??? ??? 8.1 10.1 ??? ??? 1.0 1.0 ??? ??? 9.5 11.5 ???? ???? 1.0 1.0 ??? ??? 9.5 11.5 ?? ?? ???? ? ?? ? ???? t plh , t phl ?????? ? ???? ? ?????? maximum propagation delay, e2 or e1 to y ????????? ? ??????? ? ????????? v cc = 3.3 0.3v c l = 15pf c l = 50pf ??? ? ? ? ??? ??? ? ? ? ??? 8.2 10.7 ??? ? ? ? ??? 11.4 14.9 ??? ? ? ? ??? 1.0 1.0 ??? ? ? ? ??? 13.5 17.0 ???? ? ?? ? ???? 1.0 1.0 ??? ? ? ? ??? 13.5 17.0 ?? ?? ?? ns ???? ? ?? ? ???? ?????? ? ???? ? ?????? e2 or e1 to y ????????? ? ??????? ? ????????? v cc = 5.0 0.5v c l = 15pf c l = 50pf ??? ? ? ? ??? ??? ? ? ? ??? 5.8 7.3 ??? ? ? ? ??? 8.1 10.1 ??? ? ? ? ??? 1.0 1.0 ??? ? ? ? ??? 9.5 11.5 ???? ? ?? ? ???? 1.0 1.0 ??? ? ? ? ??? 9.5 11.5 ?? ?? ?? ???? ???? c in ?????? ?????? maximum input capacitance ????????? ????????? ??? ??? ??? ??? 4 ??? ??? 10 ??? ??? ??? ??? 10 ???? ???? ??? ??? 10 ?? ?? pf typical @ 25 c, v cc = 5.0v c pd power dissipation capacitance (note 1.) 34 pf 1. 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 . c pd is used to determine the noload dynamic power consumption; p d = c pd v cc 2 f in + i cc v cc .
mc74vhc138 http://onsemi.com 6 figure 2. 50% t phl t plh v cc gnd valid valid y 50% v cc v cc gnd t plh 50% v cc y e3 t phl 50% a switching waveforms figure 3. v cc gnd t phl t plh y e2 or e1 50% v cc 50% figure 4. *includes all probe and jig capacitance figure 5. test circuit c l * test point device under test output input figure 6. input equivalent circuit
mc74vhc138 http://onsemi.com 7 package dimensions case 751b05 issue j d suffix notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. dimensions a and b do not include mold protrusion. 4. maximum mold protrusion 0.15 (0.006) per side. 5. dimension d does not include dambar protrusion. allowable dambar protrusion shall be 0.127 (0.005) total in excess of the d dimension at maximum material condition. 18 16 9 seating plane f j m r x 45 g 8 pl p b a m 0.25 (0.010) b s t d k c 16 pl s b m 0.25 (0.010) a s t dim min max min max inches millimeters a 9.80 10.00 0.386 0.393 b 3.80 4.00 0.150 0.157 c 1.35 1.75 0.054 0.068 d 0.35 0.49 0.014 0.019 f 0.40 1.25 0.016 0.049 g 1.27 bsc 0.050 bsc j 0.19 0.25 0.008 0.009 k 0.10 0.25 0.004 0.009 m 0 7 0 7 p 5.80 6.20 0.229 0.244 r 0.25 0.50 0.010 0.019 soic case 948f01 issue o tssop ??? ??? dim min max min max inches millimeters a 4.90 5.10 0.193 0.200 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 0.18 0.28 0.007 0.011 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-. section nn seating plane ident. pin 1 1 8 16 9 detail e j j1 b c d a k k1 h g detail e f m l 2x l/2 u s u 0.15 (0.006) t s u 0.15 (0.006) t s u m 0.10 (0.004) v s t 0.10 (0.004) t v w 0.25 (0.010) 16x ref k n n dt suffix
mc74vhc138 http://onsemi.com 8 package dimensions case 96601 issue o m suffix h e a 1 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 9.90 10.50 0.390 0.413 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 --- 0.78 --- 0.031 a 1 h e q 1 l e 10 0 10 l e q 1 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). m l detail p view p c a b e m 0.13 (0.005) 0.10 (0.004) 1 16 9 8 d z e a b c d e e l m z soic eiaj16 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. mc74vhc138/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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