? semiconductor components industries, llc, 2001 october, 2001 rev. 8 1 publication order number: sn74ls245/d sn74ls245 octal bus transceiver the sn74ls245 is an octal bus transmitter/receiver designed for 8-line asynchronous 2-way data communication between data buses. direction input (dr) controls transmission of data from bus a to bus b or bus b to bus a depending upon its logic level. the enable input (e ) can be used to isolate the buses. ? hysteresis inputs to improve noise immunity ? 2-way asynchronous data bus communication ? input diodes limit high-speed termination effects ? esd > 3500 volts logic and connection diagrams dip (top view) 18 17 16 15 14 13 1234 56 7 20 19 8 v cc dir e b1 b2 b3 b5 b4 b6 a1 a2 a3 a4 a5 a6 a7 910 a8 gnd 12 11 b7 b8 truth table inputs output e dir output l l bus b data to bus a l h bus a data to bus b h x isolation h = high voltage level l = low voltage level x = immaterial guaranteed operating ranges symbol parameter min typ max unit v cc supply voltage 4.75 5.0 5.25 v t a operating ambient temperature range 0 25 70 c i oh output current high 3.0 ma o 15 ma i ol output current low 24 ma low power schottky http://onsemi.com pdip20 n suffix case 738 20 1 20 1 a = assembly location wl = wafer lot yy = year ww = work week sn74ls245n awlyyww marking diagrams ls245 awlyyww soic20 dw suffix case 751d 1 1 20 1 soeiaj20 m suffix case 967 74ls245 awlyww 1 device package shipping ordering information sn74ls245n pdip20 1440 units/box sn74ls245dw soicwide 38 units/rail sn74ls245dwr2 soicwide 2500/tape & reel sn74ls245m see note 1. soeiaj20 sn74ls245mel see note 1. soeiaj20 1. for ordering information on the eiaj version of the soic package, please contact your local on semiconductor representative.
sn74ls245 http://onsemi.com 2 dc characteristics over operating temperature range (unless otherwise specified) limits symbol parameter min typ max unit test conditions v ih input high voltage 2.0 v guaranteed input high voltage for all inputs v il input low voltage 0.8 v guaranteed input low voltage for all inputs v t+ v t hysteresis 0.2 0.4 v v cc = min v ik input clamp diode voltage 0.65 1.5 v v cc = min, i in = 18 ma v oh out p ut high voltage 2.4 3.4 v v cc = min, i oh = 3.0 ma v oh output high voltage 2.0 v v cc = min, i oh = max v ol out p ut low voltage 0.25 0.4 v i ol = 12 ma v cc = v cc min, v in v il or v ih v ol output low voltage 0.35 0.5 v i ol = 24 ma v in = v il or v ih per truth table i ozh output off current high 20 m a v cc = max, v out = 2.7 v i ozl output off current low 200 m a v cc = max, v out = 0.4 v a or b, dr or e 20 m a v cc = max, v in = 2.7 v i ih input high current dr or e 0.1 ma v cc = max, v in = 7.0 v a or b 0.1 ma v cc = max, v in = 5.5 v i il input low current 0.2 ma v cc = max, v in = 0.4 v i os output short circuit current (note 2.) 40 225 ma v cc = max power supply current total, output high 70 i cc total, output low 90 ma v cc = max total at high z 95 2. not more than one output should be shorted at a time, nor for more than 1 second. ac characteristics (t a = 25 c, v cc = 5.0 v, t rise /t fall 6.0 ns) limits symbol parameter min typ max unit test conditions t plh t phl propagation delay, data to output 8.0 8.0 12 12 ns c l = 45 p f, t pzh output enable time to high level 25 40 ns c l = 45 pf , r l = 667 w t pzl output enable time to low level 27 40 ns l t plz output disable time from low level 15 25 ns c l = 5.0 pf, t phz output disable time from high level 15 25 ns c l = 5 . 0 f , r l = 667 w
sn74ls245 http://onsemi.com 3 package dimensions n suffix plastic package case 73803 issue e notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: inch. 3. dimension l to center of lead when formed parallel. 4. dimension b does not include mold flash. m l j 20 pl m b m 0.25 (0.010) t dim min max min max millimeters inches a 25.66 27.17 1.010 1.070 b 6.10 6.60 0.240 0.260 c 3.81 4.57 0.150 0.180 d 0.39 0.55 0.015 0.022 g 2.54 bsc 0.100 bsc j 0.21 0.38 0.008 0.015 k 2.80 3.55 0.110 0.140 l 7.62 bsc 0.300 bsc m 0 15 0 15 n 0.51 1.01 0.020 0.040 e 1.27 1.77 0.050 0.070 1 11 10 20 a seating plane k n f g d 20 pl t m a m 0.25 (0.010) t e b c f 1.27 bsc 0.050 bsc d suffix plastic soic package case 751d05 issue f 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.
sn74ls245 http://onsemi.com 4 package dimensions m suffix soeiaj package case 96701 issue o 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 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 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. sn74ls245/d 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 n. american technical support : 8002829855 toll free usa/canada
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