? semiconductor components industries, llc, 2012 october, 2012 ? rev. 10 1 publication order number: mc74lcx138/d mc74lcx138 low-voltage cmos 3-to-8 decoder/demultiplexer with 5 v ? tolerant inputs the mc74lcx138 is a high performance, 3 ? to ? 8 decoder/demultiplexer operating from a 2.3 to 3.6 v supply. high impedance ttl compatible inputs significantly reduce current loading to input drivers while ttl compatible outputs offer improved switching noise performance. a v i specification of 5.5 v allows mc74lcx138 inputs to be safely driven from 5 v devices. the mc74lcx138 is suitable for memory address decoding and other ttl level bus ? oriented applications. the mc74lcx138 high ? speed 3 ? to ? 8 decoder/demultiplexer accepts three binary weighted inputs (a0, a1, a2) and, when enabled, provides eight mutually exclusive active ? low outputs (o0 ? o7 ). the lcx138 features three enable inputs, two active ? low (e1 , e2 ) and one active ? high (e3). all outputs will be high unless e1 and e2 are low, and e3 is high. this multiple enabled function allows easy parallel expansion of the device to a 1 ? of ? 32 (5 lines to 32 lines) decoder with just four lcx138 devices and one inverter (see figure 1). the lcx138 can be used as an 8 ? output demultiplexer by using one of the active ? low enable inputs as the data input and the other enable inputs as strobes. the enable inputs which are not used must be permanently tied to their appropriate active ? high or active ? low state. current drive capability is 24 ma at the outputs. features ? designed for 2.3 v to 3.6 v v cc operation ? 5 v tolerant inputs ? interface capability with 5 v ttl logic ? lvttl compatible ? lvcmos compatible ? 24 ma balanced output sink and source capability ? near zero static supply current (10 a) substantially reduces system power requirements ? latchup performance exceeds 500 ma ? esd performance: human body model >2000 v machine model >200 v ? nlv prefix for automotive and other applications requiring unique site and control change requirements; aec ? q100 qualified and ppap capable ? these devices are pb ? free, halogen free/bfr free and are rohs compliant marking diagrams a = assembly location wl, l = wafer lot y = year ww, w = work week g or = pb ? free package soic ? 16 d suffix case 751b lcx138g awlyww lcx 138 alyw tssop ? 16 dt suffix case 948f 16 16 1 1 16 1 16 1 see detailed ordering and shipping information in the package dimensions section on p age 3 of this data sheet. ordering information http://onsemi.com (note: microdot may be in either location)
mc74lcx138 http://onsemi.com 2 figure 1. pinout: 16 ? lead (top view) figure 2. logic diagram 15 16 14 13 12 11 10 2 1 34567 v cc o0 o1 o2 o3 o4 o5 a0 a1 a2 e1 e2 e3 o7 8 gnd 9 o6 o7 o6 o5 o4 o3 o2 o1 o0 a2 a1 a0 e1 e2 e3 6 5 4 1 2 3 7 9 10 11 12 13 14 15 pin names pins function a0 ? a2 address inputs e1 ? e2 enable inputs e3 enable input o0 ? o7 outputs truth table inputs outputs e1 e2 e3 a0 a1 a2 o0 o1 o2 o3 o4 o5 o6 o7 h x x x x x h h h h h h h h x h x x x x h h h h h h h h x x l x x x h h h h h h h h l l h l l l l h h h h h h h l l h h l l h l h h h h h h l l h l h l h h l h h h h h l l h h h l h h h l h h h h l l h l l h h h h h l h h h l l h h l h h h h h h l h h l l h l h h h h h h h h l h l l h h h h h h h h h h h l h = high voltage level l = low voltage level x = high or low voltage level and transitions are acceptable for i cc reasons, do not float inputs
mc74lcx138 http://onsemi.com 3 figure 3. expansion to 1 ? of ? 32 decoding o0 o0 o1 o2 o3 o4 o5 o6 o7 a0 a1 a2 e o0 o1 o2 o3 o4 o5 o6 o7 a0 a1 a2 e o0 o1 o2 o3 o4 o5 o6 o7 a0 a1 a2 e o31 o0 o1 o2 o3 o4 o5 o6 o7 a0 a1 a2 e h a4 a3 a2 a1 a0 ?04 123 123 123 123 ordering information device package shipping ? mc74lcx138dr2g soic ? 16 (pb ? free) 2500 tape & reel MC74LCX138DTG tssop ? 16 (pb ? free) 96 units / rail mc74lcx138dtr2g tssop ? 16 (pb ? free) 2500 tape & reel nlv74lcx138dr2g* soic ? 16 (pb ? free) 2500 tape & reel ?for information on tape and reel specifications, including part orientation and tape sizes, please refer to our tape and reel packaging specifications brochure, brd8011/d. *nlv prefix for automotive and other applications requiring unique site and control change requirements; aec ? q100 qualified and ppap capable. maximum ratings symbol parameter value condition units v cc dc supply voltage ? 0.5 to +7.0 v v i dc input voltage ? 0.5 ? v i ? +7.0 v v o dc output voltage ? 0.5 ? v o ? v cc + 0.5 output in high or low state (note 1) v i ik dc input diode current ? 50 v i < gnd ma i ok dc output diode current ? 50 v o < gnd ma +50 v o > v cc ma i o dc output source/sink current ? 50 ma i cc dc supply current per supply pin ? 100 ma i gnd dc ground current per ground pin ? 100 ma t stg storage temperature range ? 65 to +150 ? c msl moisture sensitivity level 1 stresses exceeding maximum ratings may damage the device. maximum ratings are stress ratings only. functional operation above t he recommended operating conditions is not implied. extended exposure to stresses above the recommended operating conditions may af fect device reliability. 1. i o absolute maximum rating must be observed.
mc74lcx138 http://onsemi.com 4 recommended operating conditions symbol parameter min typ max units v cc supply voltage operating data retention only 2.0 1.5 2.5, 3.3 2.5, 3.3 3.6 3.6 v v i input voltage 0 5.5 v v o output voltage (high or low state) (3 ? state) 0 v cc v i oh high level output current v cc = 3.0 v ? 3.6 v v cc = 2.7 v ? 3.0 v v cc = 2.3 v ? 2.7 v ? 24 ? 12 ? 8 ma i ol low level output voltage v cc = 3.0 v ? 3.6 v v cc = 2.7 v ? 3.0 v v cc = 2.3 v ? 2.7 v +24 +12 +8 ma t a operating free ? air temperature ? 40 +85 ? c t/ v input transition rise or fall rate, v in from 0.8 v to 2.0 v, v cc = 3.0 v 0 10 ns/v dc electrical characteristics t a = ? 40 ? c to +85 ? c symbol characteristic condition min max units v ih high level input voltage (note 2) 2.3 v ? v cc ? 2.7 v 1.7 v 2.7 v ? v cc ? 3.6 v 2.0 v il low level input voltage (note 2) 2.3 v ? v cc ? 2.7 v 0.7 v 2.7 v ? v cc ? 3.6 v 0.8 v oh high level output voltage 2.3 v ? v cc ? 3.6 v; i oh = ? 100 a v cc ? 0.2 v v cc = 2.3 v; i oh = ? 8 ma 1.8 v cc = 2.7 v; i oh = ? 12 ma 2.2 v cc = 3.0 v; i oh = ? 18 ma 2.4 v cc = 3.0 v; i oh = ? 24 ma 2.2 v ol low level output voltage 2.3 v ? v cc ? 3.6 v; i ol = 100 a 0.2 v v cc = 2.3 v; i ol = 8 ma 0.6 v cc = 2.7 v; i ol = 12 ma 0.4 v cc = 3.0 v; i ol = 16 ma 0.4 v cc = 3.0 v; i ol = 24 ma 0.55 i off power off leakage current v cc = 0, v in = 5.5 v or v out = 5.5 v 10 a i in input leakage current v cc = 3.6 v, v in = 5.5 v or gnd ? 5 a i cc quiescent supply current v cc = 3.6 v, v in = 5.5 v or gnd 10 a i cc increase in i cc per input 2.3 ? v cc ? 3.6 v; v ih = v cc ? 0.6 v 500 a 2. these values of v i are used to test dc electrical characteristics only. ac characteristics (t r = t f = 2.5 ns; r l = 500 ) limits t a = ? 40 ? c to +85 ? c v cc = 3.3 v ? 0.3 v v cc = 2.7 v v cc = 2.5 v ? 0.2 v c l = 50 pf c l = 50 pf c l = 30 pf symbol parameter waveform min max min max min max units t plh t phl propagation delay an to on 1, 2 1.5 1.5 6.0 6.0 1.5 1.5 7.0 7.0 1.5 1.5 7.2 7.2 ns t plh t phl propagation delay e1, e2 to on 2 1.5 1.5 6.5 6.5 1.5 1.5 7.5 7.5 1.5 1.5 8.4 8.4 ns t plh t phl propagation delay e3 to on 1 1.5 1.5 6.0 6.0 1.5 1.5 7.0 7.0 1.5 1.5 7.2 7.2 ns t oshl t oslh output ? to ? output skew (note 3) 1.0 1.0 ns 3. skew is defined as the absolute value of the dif ference between the actual propagation delay for any two separate outputs of the same d evice. the specification applies to any outputs switching in the same direction, either high ? to ? low (t oshl ) or low ? to ? high (t oslh ); parameter guaranteed by design.
mc74lcx138 http://onsemi.com 5 capacitive characteristics symbol parameter condition typical units c in input capacitance v cc = 3.3 v, v i = 0 v or v cc 7 pf c out output capacitance v cc = 3.3 v, v i = 0 v or v cc 8 pf c pd power dissipation capacitance 10 mhz, v cc = 3.3 v, v i = 0 v or v cc 25 pf v cc 0 v v oh v ol an, e3 o n t plh t phl vmi vmo vmo vmi waveform 2: propagation delays for non ? inverting outputs 2.7 v 0 v v oh v ol an, e1 , e2 on t plh t phl waveform 1: propagation delays for inverting outputs vmi vmo vmo vmi vcc symbol 3.3 v + 0.3 v 2.7 v 2.5 v + 0.2 v vmi 1.5 v 1.5 v vcc/2 vmo 1.5 v 1.5 v vcc/2 figure 4. ac waveforms pulse generator r t dut v cc r l c l figure 5. test circuit c l = 50 pf at v cc = 3.3 ? 0.3 v or equivalent (includes jig and probe capacitance) c l = 30 pf at v cc = 2.5 ? 0.2 v or equivalent (includes jig and probe capacitance) r l = r 1 = 500 or equivalent r t = z out of pulse generator (typically 50 )
mc74lcx138 http://onsemi.com 6 package dimensions tssop ? 16 dt suffix case 948f issue b ??? ??? 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 n ? n seating plane ident. pin 1 1 8 16 9 detail e j j1 b c d a k k1 h g ? 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 7.06 16x 0.36 16x 1.26 0.65 dimensions: millimeters 1 pitch soldering footprint* *for additional information on our pb ? free strategy and soldering details, please download the on semiconductor soldering and mounting techniques reference manual, solderrm/d.
mc74lcx138 http://onsemi.com 7 package dimensions soic ? 16 d suffix case 751b ? 05 issue k 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 6.40 16x 0.58 16x 1.12 1.27 dimensions: millimeters 1 pitch soldering footprint* 16 89 8x *for additional information on our pb ? free strategy and soldering details, please download the on semiconductor soldering and mounting techniques reference manual, solderrm/d. on semiconductor and are registered trademarks of semiconductor co mponents industries, llc (scillc). scillc owns the rights to a numb er of patents, trademarks, copyrights, trade secrets, and other intellectual property. a list ing of scillc?s product/patent coverage may be accessed at ww w.onsemi.com/site/pdf/patent ? marking.pdf. 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 s pecifically disclaims any and all liability, including without limitation special, consequential or incidental damages. ?typical? parameters which may be provided in scillc data sheets and/ or specifications can and do vary in different applications and actual performance may vary over time. all operating parame ters, including ?typicals? must be validated for each customer application by customer?s technical experts. scillc does not convey any license under its patent rights nor the right s of others. scillc products are not designed, intended, or a uthorized 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 whic h the failure of the scillc product could create a situation where personal injury or death may occur. should buyer purchase or us e scillc products for any such unintended or unauthorized appli cation, 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 unin tended or unauthorized use, even if such claim alleges that scil lc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyrig ht laws and is not for resale in any manner. publication ordering information n. american technical support : 800 ? 282 ? 9855 toll free usa/canada europe, middle east and africa technical support: phone: 421 33 790 2910 japan customer focus center phone: 81 ? 3 ? 5817 ? 1050 mc74lcx138/d literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone : 303 ? 675 ? 2175 or 800 ? 344 ? 3860 toll free usa/canada fax : 303 ? 675 ? 2176 or 800 ? 344 ? 3867 toll free usa/canada email : orderlit@onsemi.com on semiconductor website : www.onsemi.com order literature : http://www.onsemi.com/orderlit for additional information, please contact your local sales representative
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