? semiconductor components industries, llc, 2015 october, 2015 ? rev. 0 1 publication order number: 74lvc245a/d 74lvc245a low-voltage cmos octal transceiver with 5 v?tolerant inputs and outputs (3?state, non?inverting) the 74lvc245a is a high performance, non?inverting octal transceiver operating from a 1.2 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 74lvc245a inputs to be safely driven from 5 v devices if v cc is less than 5.0 v. the 74lvc245a is suitable for memory address driving and all ttl level bus oriented transceiver applications. current drive capability is 24 ma at both a and b ports. the transmit/receive (t/r ) input determines the direction of data flow through the bi?directional trans ceiver. transmit (active?high) enables data from a ports to b ports; receive (active?low) enables data from b to a ports. the output enable input, when high, disables both a and b ports by placing them in a high z condition. features ? designed for 1.2 to 3.6 v v cc operation ? 5 v tolerant ? interface capability with 5 v ttl logic ? supports live insertion and withdrawal ? i off specification guarantees high impedance when v cc = 0 v ? 24 ma output sink and source capability ? near zero static supply current in all three logic states (10 a) substantially reduces system power requirements ? esd performance: human body model >2000 v machine model >200 v ? these devices are pb?free, halogen free/bfr free and are rohs compliant 1 20 marking diagram a = assembly location l = wafer lot y = year w = work week = pb?free package lvc 245a alyw tssop?20 dt suffix case 948e 1 20 see detailed ordering and shipping information in the package dimensions section on page 7 of this data sheet. ordering information www. onsemi.com (note: microdot may be in either location)
74lvc245a www. onsemi.com 2 b0 oe 19 t/r 1 a0 b1 a1 b2 a2 b3 a3 b4 a4 b5 a5 b6 a6 b7 a7 2 3 4 5 6 7 8 9 18 17 16 15 14 13 12 11 figure 1. pinout (top view) 19 20 18 17 16 15 14 2 1 34567 v cc 13 8 12 9 11 10 oe b0 b1 b2 b3 b4 b5 b6 b7 t/r a0 a1 a2 a3 a4 a5 a6 a7 gnd pin names function output enable input transmit/receive input side a 3?state inputs or 3?state outputs side b 3?state inputs or 3?state outputs pins oe t/r a0?a7 b0?b7 truth table operating mode non?inverting inputs l l h oe t/r l h x b data to a bus a data to b bus z h = high voltage level l = low voltage level z = high impedance state x = high or low voltage level and transitions are acceptable for i cc reasons, do not float inputs figure 2. logic diagram
74lvc245a www. onsemi.com 3 maximum ratings symbol parameter condition value unit v cc dc supply voltage ?0.5 to +6.5 v v i dc input voltage ?0.5 v i +6.5 v v o dc output voltage output in 3?state ?0.5 v o +6.5 v output in high or low state (note 1) ?0.5 v o v cc + 0.5 i ik dc input diode current v i < gnd ?50 ma i ok dc output diode current v o < gnd ?50 ma v o > v cc +50 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 t l lead temperature, 1 mm from case for 10 seconds t l = 260 c t j junction temperature under bias t j = 135 c ja thermal resistance (note 2) 110.7 c/w msl moisture sensitivity level 1 stresses exceeding those listed in the maximum ratings table may damage the device. if any of these limits are exceeded, device function ality should not be assumed, damage may occur and reliability may be affected. 1. i o absolute maximum rating must be observed. 2. measured with minimum pad spacing on an fr4 board, using 10 mm?by?1 inch, 2 ounce copper trace no air flow. recommended operating conditions symbol parameter min typ max unit v cc supply voltage operating functional 1.65 1.2 3.6 3.6 v v i input voltage 0 5.5 v v o output voltage high or low state 3?state 0 0 v cc 5.5 v i oh high level output current v cc = 3.0 v ? 3.6 v v cc = 2.7 v ? 3.0 v ?24 ?12 ma i ol low level output current v cc = 3.0 v ? 3.6 v v cc = 2.7 v ? 3.0 v 24 12 ma t a operating free?air temperature ?40 +125 c t/ v input transition rise or fall rate v cc = 1.2 to 2.7 v v cc = 2.7 to 3.6 v 0 0 20 10 ns/v functional operation above the stresses listed in the recommended operating ranges is not implied. extended exposure to stresse s beyond the recommended operating ranges limits may affect device reliability.
74lvc245a www. onsemi.com 4 dc electrical characteristics symbol parameter conditions ?40 to +85 c ?40 to +125 c unit min typ (note 3) max min typ (note 3) max v ih high?level input voltage v cc = 1.2 v 1.08 ? ? 1.08 ? ? v v cc = 1.65 v to 1.95 v 0.65 x v cc ? ? 0.65 x v cc ? ? v cc = 2.3 v to 2.7 v 1.7 ? ? 1.7 ? ? v cc = 2.7 v to 3.6 v 2.0 ? ? 2.0 ? ? v il low?level input voltage v cc = 1.2 v ? ? 0.12 ? ? 0.12 v v cc = 1.65 v to 1.95 v ? ? 0.35 x v cc ? ? 0.35 x v cc v cc = 2.3 v to 2.7 v ? ? 0.7 ? ? 0.7 v cc = 2.7 v to 3.6 v ? ? 0.8 ? ? 0.8 v oh high?level output voltage v i = v ih or v il ? ? ? v i o = ?100 a; v cc = 1.65 v to 3.6 v v cc ? 0.2 ? ? v cc ? 0.3 ? ? i o = ?4 ma; v cc = 1.65 v 1.2 ? ? 1.05 ? ? i o = ?8 ma; v cc = 2.3 v 1.8 ? ? 1.65 ? ? i o = ?12 ma; v cc = 2.7 v 2.2 ? ? 2.05 ? ? i o = ?18 ma; v cc = 3.0 v 2.4 ? ? 2.25 ? ? i o = ?24 ma; v cc = 3.0 v 2.2 ? ? 2.0 ? ? v ol low?level output voltage v i = v ih or v il ? ? ? v i o = 100 a; v cc = 1.65 v to 3.6 v ? ? 0.2 ? ? 0.3 i o = 4 ma; v cc = 1.65 v ? ? 0.45 ? ? 0.65 i o = 8 ma; v cc = 2.3 v ? ? 0.6 ? ? 0.8 i o = 12 ma; v cc = 2.7 v ? ? 0.4 ? ? 0.6 i o = 24 ma; v cc = 3.0 v ? ? 0.55 ? ? 0.8 i i input leakage current v i = 5.5 v or gnd v cc = 3.6 v ? 0.1 5 ? 0.1 20 a i oz off?state output current v i = v ih or v il ; v o = 5.5 v or gnd; v cc = 3.6 v ? 0.1 5 ? 0.1 20 a i off power?off leakage current v i or v o = 5.5 v; v cc = 0 v ? 0.1 10 ? 0.1 20 a i cc supply current v i = v cc or gnd; i o = 0 a; v cc = 3.6 v ? 0.1 10 ? 0.1 40 a i cc additional supply current per input pin; v i = v cc ? 0.6 v; i o = 0 a; v cc = 2.7 v to 3.6 v ? 5 500 ? 5 5000 a product parametric performance is indicated in the electrical characteristics for the listed test conditions, unless otherwise noted. product performance may not be indicated by the electrical characteristics if operated under different conditions. 3. all typical values are measured at t a = 25 c and v cc = 3.3 v, unless stated otherwise.
74lvc245a www. onsemi.com 5 ac electrical characteristics (t r = t f = 2.5 ns) symbol parameter conditions ?40 to +85 c ?40 to +125 c unit min typ (note 4) max min typ (note 4) max t pd propagation delay (note 5) an to bn, bn to an v cc = 1.2 v ? 17.0 ? ? ? ? ns v cc = 1.65 v to 1.95 v 1.5 6.5 14.6 1.0 ? 16.9 v cc = 2.3 v to 2.7 v 1.0 3.4 7.6 1.0 ? 8.7 v cc = 2.7 v 1.0 3.4 7.3 1.0 ? 9.5 v cc = 3.0 v to 3.6 v 1.0 2.9 6.3 1.0 ? 8.0 t en enable time (note 6) oe to an, bn v cc = 1.2 v ? 22.0 ? ? ? ? ns v cc = 1.65 v to 1.95 v 1.0 8.3 19.5 1.0 ? 22.5 v cc = 2.3 v to 2.7 v 1.0 4.6 10.7 1.0 ? 12.4 v cc = 2.7 v 1.0 4.8 9.5 0.5 ? 12.0 v cc = 3.0 v to 3.6 v 0.5 3.7 8.5 0.5 ? 11.0 t dis disable time (note 7) oe to an, bn v cc = 1.2 v ? 12.0 ? ? ? ? ns v cc = 1.65 v to 1.95 v 1.0 5.5 12.3 1.0 ? 14.2 v cc = 2.3 v to 2.7 v 1.0 3.1 7.1 1.0 ? 8.2 v cc = 2.7 v 1.0 3.9 8.0 0.5 ? 10.0 v cc = 3.0 v to 3.6 v 0.5 3.6 7.0 0.5 ? 9.0 t sk(0) output skew time (note 8) ? ? 1.0 ? ? 1.5 ns 4. typical values are measured at t a = 25 c and v cc = 3.3 v, unless stated otherwise. 5. t pd is the same as t plh and t phl . 6. t en is the same as t pzl and t pzh . 7. t dis is the same as t plz and t phz . 8. skew between any two outputs of the same package switching in the same direction. this parameter is guaranteed by design. dynamic switching characteristics symbo l characteristic condition t a = +25 c unit min typ max v olp dynamic low peak voltage (note 9) v cc = 3.3 v, c l = 50 pf, v ih = 3.3 v, v il = 0 v v cc = 2.5 v, c l = 30 pf, v ih = 2.5 v, v il = 0 v 0.8 0.6 v v v olv dynamic low valley voltage (note 9) v cc = 3.3 v, c l = 50 pf, v ih = 3.3 v, v il = 0 v v cc = 2.5 v, c l = 30 pf, v ih = 2.5 v, v il = 0 v ?0.8 ?0.6 v v 9. number of outputs defined as ?n?. measured with ?n?1? outputs switching from high?to?low or low?to?high. the remaining output is measured in the low state. capacitive characteristics symbol parameter condition typical unit c in input capacitance (oe , t/r ) v cc = 3.3 v, v i = 0 v or v cc 4.0 pf c i/o input/output capacitance v cc = 3.3 v, v i = 0 v or v cc 10.0 pf c pd power dissipation capacitance (note 10) per input; v i = gnd or v cc pf v cc = 1.65 v to 1.95 v 7.7 v cc = 2.3 v to 2.7 v 11.3 v cc = 3.0 v to 3.6 v 14.4 10. c pd is used to determine the dynamic power dissipation (p d in w). p d = c pd x v cc 2 x fi x n + (c l x v cc 2 x fo) where: fi = input frequency in mhz; fo = output frequency in mhz c l = output load capacitance in pf v cc = supply voltage in volts n = number of outputs switching (c l x v cc 2 x fo) = sum of the outputs.
74lvc245a www. onsemi.com 6 waveform 1 ? propagation delays t r = t f = 2.5 ns, 10% to 90%; f = 1 mhz; t w = 500 ns v cc 0 v v oh v ol an, bn t phl t plh waveform 2 ? output enable and disable times t r = t f = 2.5 ns, 10% to 90%; f = 1 mhz; t w = 500 ns 0 v oe , t/r t pzh t phz t pzl t plz vmo vmo vmi vmi vmo vmo figure 3. ac waveforms vmi v oh v hz v ol v cc v lz bn, an an, bn an, bn vmi symbol v cc 1.2 v 1.8 v 0.15 v 2.5 v 0.2 v 2.7 v 3.3 v 0.3 v v i v cc v cc v cc 2.7 v 2.7 v vmi v cc /2 v cc /2 v cc /2 1.5 v 1.5 v vmo v cc /2 v cc /2 v cc /2 1.5 v 1.5 v v hz v ol + 0.15 v v ol + 0.15 v v ol + 0.15 v v ol + 0.3 v v ol + 0.3 v v lz v oh ? 0.15 v v oh ? 0.15 v v oh ? 0.15 v v oh ? 0.3 v v oh ? 0.3 v
74lvc245a www. onsemi.com 7 open pulse generator r t dut v cc r l r 1 c l v ext gnd c l includes jig and probe capacitance r t = z out of pulse generator (typically 50 q) r 1 = r l supply voltage input load v ext v cc (v) v i t r , t f c l r l t plh , t phl t plz , t pzl t phz , t pzh 1.2 v cc 2 ns 30 pf 1 kq open 2 x v cc gnd 1.65 ? 1.95 v cc 2 ns 30 pf 1 kq open 2 x v cc gnd 2.3 ? 2.7 v cc 2 ns 30 pf 500 q open 2 x v cc gnd 2.7 2.7 v 2.5 ns 50 pf 500 q open 2 x v cc gnd 3.0 ? 3.6 2.7 v 2.5 ns 50 pf 500 q open 2 x v cc gnd figure 4. test circuit ordering information device package shipping ? 74LVC245ADTR2G tssop?20 (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.
74lvc245a www. onsemi.com 8 package dimensions tssop?20 case 948e?02 issue c 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 n?n 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 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.
74lvc245a www. onsemi.com 9 on semiconductor and the are registered trademarks of semiconductor components industries, llc (scillc) or its subsidia ries in the united states and/or other countries. scillc owns the rights to a number of pa tents, trademarks, copyrights, trade secret s, and other intellectual property. a listin g of scillc?s product/patent coverage may be accessed at www.onsemi.com/site/pdf/patent?marking.pdf. scillc reserves the right to make changes without further notice to any product s herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for any part icular purpose, nor does sci llc 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. ?typi cal? 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 param eters, 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 authorized for use as components in systems intended for surgic al implant into the body, or other applications intended to s upport or sustain life, or for any other application in which the failure of the scillc product could create a situation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer s hall indemnify and hold scillc and its officers , employees, subsidiaries, affiliates, and dist ributors 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 unauthorized use, even if such claim alleges that scillc was negligent regarding the design or manufac ture of the part. scillc is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyright laws and is not for resale in any manner. p ublication 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 74lvc245a/d literature fulfillment : literature distribution center for on semiconductor 19521 e. 32nd pkwy, aurora, colorado 80011 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 loc al sales representative
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