249 54247/74247 BCD-to-seven-segment Decoder /Driver with Open-Collector Output _ Schottky 7 TTL ___High-Speed TTL _{_ Low-Power Schottky TTL Standard TTL _Low-Power TTL kage Package | | Package Package Package Device T ({ Device T: 4 Devi T i ype ic [P [MIcey cE ype c|P Mice] vice Type CIR IMIce Device Type TA. Po jf ft SNSAL S247 sa W | SN54247 aa wa ; a ({ Device T: Fe YP? Cp IM IcF SN74L S247 STING SN74247 J aING, rf ty FAIRCHILD Pp MOTOROLA }--} : _ Tf | NSC. p-- : . = i | PHILIPS | - +-| -}-+4-f SIGNETICS }-~- -+ + pn att} | SIEMENS |-~--- t- +--+ _ Saas _ FUJITSU HH LE -tf HITACHI t far rf MITSUBISHI} ---- --} a = q H T NEC | ----_ oat -- a ~ E = | Tt [ ! TOSHIBA _ Pao ET OS ft |_| To7a2a7 ~T pol TPT Electrical Characteristics SN54LS247/SN74LS247 Pin Assignment (Top view) ourmuts absolute maximum ratings over operating free-air ten perature range | Supply voltage, Vvoo. wi Operating free-air | SN5SLS TSSC to Input_vo voltage | {temperature range SNTALS Current forced into any, output in he off stat Veo b 4 * Positive jogic: see function table } imA | sess omc temperature range }-65C to 150C 7 recommended operating condi conditions a ~([SNS4LS247 | SN74LS247 oe | UNIT ; MIN. NOM MAX [MIN NOM MAX si voltage, VOC as 5 5.5 [4.75 5 5.25) V | Off-state output voltage. Vo (of (off) {a thru g - eA PL, GND On: state output current, 0 (or aNPUTS pur eut ieuTs: High-level output current 1OH Function Table _ Low-level output cue! currant tou 247. LS247 rea ee | Operating ature, Tp iret ee cw asp [ee ner electical characteristics over recommended operating ot ix tic con] om erlow a er free-air temperature range ' if xh us nl on [ox fos pe vo Petife re tT Ww fore on [ow for ___ PARAMETER * | aera are SEEE $ REC now el] [on [ow [ow : a falls OO UP Jow Tow Tow Pow POR x [a coef fom [ow [ow [ow tO Son f ot Beeler fom [ow Input clamp voltage ME fri ache Dacca ea ore Tore Von High-level 5y/RRO Voo= MIN, to peDe mo & Ca bee re Boer |on J out put voltage /| ViL <0. 8V, cis Expcfa wi] 4 [pee ore fore lore po ean pe | ao a as rE xx] Core fore rr bore = ' wiejL eee L FOF E OFF OFF VoL Low-level BIABO | ce" lH 0.38 0.5) ut lela le x x x] n fom [ow [ow [ow output voltage | AL "REUMBO 9 ence AND Loge rent ekg pe (a cote tang ete (RAO), pea ee . sees Toe Or output current |* thru g Pomme tt Wot 1 oe ee fe ' ~ Ko Grati Lt fal Tels islet fetal [ah Ofon OM) cutput voltage [2 'NtY & | I o 1 2 3 5 1 1 3 aS a NUMERICAL, DESIGNATIONS ANo RESULTANT DISPLAYS input current Al St o F ti 1 BI k Di g ry Input = i SEGMENT unctiona joc lagram at maximum | sept BI/RBO! VCC =MAX, VI=7V a.) ae IDENTIFICATION input voltage fd a oe Dope High-level Ary input wet 7) | IM input curcent [except BI/RBO arn cours L level Any input 8 . 0 bev wo current (oxceet BI /RBO| Veg =MAX, Vj =0.4V mer 12s LWoureut input Jn c ne [BIRO Pe BERR? 1 "OT SY Dea pelidrouredt ! pply curre . tof Tusn-off time from TA input ve Baer \Voco=5. Ta=25c, (8 oysen toft_ Turn-off time from RBlinput | Cy =topF, Ry =665Q Lawl TEST (3) > Te trom {> Pour 1 ton Turn-on time from RBI input meee Sone 2 t EEL oe NA ; py. 247:LS247 BCO-TO.SEVEN-SEGME NOTES: |, tg is measured wath all outputs open aed al impure at 4. 5V when euteut function ; ECD TO-SEVEN-SEGMENT 2, The blanking input (Bt) must be open on ata faeN or be ou a nit bh s 4, When ripple-blanking input (RB!) and inputs A,B,C, and D are at a low level with the 0 through 15 are desired. The ripple-blanking input must be open or high if Dlan jamp test input high, all segment outputs go off and the ripple-bianking output (RBO} goes king of a decimal zero is not desired. e to a tow level (response condition), 3, when a tow jose level is apples directly te the blanking input (81), alt segment outputs 5, When the blanking input /ripple blanking output (BI/RBO) is open or held high and a are off regardiess of the level of auy other input. low is applied t the lamp-test input, all segment outputs are on. * For conditions shown as MIN or MAX, use the appropriate vatue specified under recommended operating conditions. t All typical values are at Vog = 5. | a=25C. * loff Corresponds to tPL} and to, corresponds to tpHL .