SN54184 TI | Alldatasheet
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TYPES SN54184, SN54185A, SN74184, SN74185A BCD-TO-BINARY AND BINARY-TO-BCD CONVERTERS FEBRUARY 1971 —REVISED DECEMBER 1972 SN54184, SN74184 BCD-TO-BINARY CONVERTERS SN54185A, SN74185A BINARY-TO-BCD CONVERTERS SN54186, SNS4185A . .. JOR W PACKAGE ‘SN74184, SN74185A ... J ORN PACKAGE (ror view) yi Or OreD vee ye Ge ws v3 Qs we ya Qs 13f) D description vs Qs wfc ye Qs ufle These monolithic converters are derived from the w G7 wha custom MSI 256-bit read-only memories SN5488 and cno Cs _9f v8 SN7488, Emitter connections are made to provide direct read-out of converted codes at outputs YS. taste! through Y1 as shown in the function tables. These converters demonstrate the versatility of a read-only SNS#I04, SN74184 memory in that an unlimited number of reference PACKAGE COUNT AND DELAY TIMES tables or conversion tables may be built into a system FOR BCD TOBINARY CONVERSION. PACKAGES csing economical, customized reatonly memories | weemits,| keaumes. Poa | Both of these converters comprehend that the least > ~ significant bits (LSB) of the binary and BCD codes ‘ tao 200 are logically equal, and in each case the LSB bypasses, " toe ine the converter as illustrated in the typical applications. to 20 ‘00 This means that a 6:bit converter is produced in each oe we ooo Em case. Both devices are cascadable to N bits. 3 ‘An overriding enable input is provided on each converter which, when taken high, inhibits the function, causing all ‘outputs to go high. For this reason, and to minimize power consumption, unused outputs Y7 and Y8 of the 185A and all “don’t care” conditions of the ‘184 are programmed high. The outputs are of the open-collector type. is} The SN54184 and SN54185A are characterized for operation over the full military temperature range of —55°C to S 125°C; the SN74184 and SN74185A are characterized for operation from 0°C to 70°C. a SN54184 and SN74184 BCD-to-binary converters J The Gbit BCD-to-binary function of the SN54184 —In_ addition to BCD-to-binary conversion, the - ‘and SN74184 is analogous to the algorithm: SN54184 and SN74184 are programmed to generate E BCD 9's complement or BCD 10's complement, a. Shift BCD number right one bit and examine gain, in each case, one bit of the complement code each decade. Subtract three from each 4bit is logically equal to one of the BCD bits; therefore, decade containing a binary value greater than _these complements can be produced on three lines. seven. As outputs Y6, Y7, and Y8 are not required in the b. Shift right, examine, and correct after each BCD-to-binary conversion, they are utilized to shift until the least significant decade contains Provide these complement codes as specified in the ‘a number smaller than eight and all other con. function table (following page, right) when the de- verted decades contain zeros. vices are connected as shown above the function table. ‘PRODUCTION DATA 1 dcument coi intrmation crt #8 T &% ost Por way pecan Sot INSTRUMENTS et nocessariy ocode esting OF AH PATAMELES. —posT OFFICE BOX 225012 © DALLAS, TEXAS 75265
nn Rae | $N54184 and SN74184 BCD-to-binary converters (continued) ecoe's aco 10s + epitconverTeR COMPLEMENT CONVERTER COMPLEMENT CONVERTER so ts eco eco Do oe A ee sv/> ce a toe = [eee fo oe snse1e4 on sn74184 setae on sN74184 svse1s4 on su7418 vs ve_va_v2_vt vs_v7_ve sy vs eA Bw w Np Nc Ne Na, To Tc "a Ta,
317 BINARY OUTPUT cD 9 COMPLEMENT co 10 COMPLEMENT
FUNCTION TABLE FUNCTION TABLE BCD-TOBINARY eco 9's on Bco 10s CONVERTER COMPLEMENT CONVERTER a ruts ouTeUTS ouTrOTe w (See Nove A (see Note 8) (Seu Noted) feo ce Ale lvs va v3 v2 vi jet oc sal @lve v7 ve) rc wo few wc ele}e Ht ewe ealele ee o pa pete ep owt et fi te te m mos fe coc mw clefU Hw 2 fe ucwcfejHee oO vez |WHob owe Liete WH HW OH a [Ht we ecfc}e HH n ga jew cc wief AH ee ee Ce [any [xxx xT HHH OW (any Tx ee] 11 = igh eve, L = fow lve, X= irotevant HH= high level, = tow tvel X= ivelevant NOTES. "A. Input conditions other than thowe shown produce NOTES: —G. Input conditions other than thove shown produce 8. Outputs ¥6, V7. and YB ove not uted for BCD-t0 ©. Outputs ¥1 through V8 are not used for BCD 9's or ‘wan thew devices ace used se comptement converters, input & is ied or a made control. With this input low, the BCD 9° nent is ganerated 3-732 I TEXAS % INSTRUMENTS
ee - . 1 TYPES SN54185A, SN74185A. BCD-TO-BINARY AND BINARY-TO-BCD CONVERTERS SN54185A and SN74185A binary-to-BCD converters 6BIT CONVERTER ary BINARY INPUT ‘The function performed by these 6-bit binary-to-BCD ¢ \\ converters is analogous to the algorithm: a. Examine the three most significant bits, If ‘the sum is greater than four, add three and © oc BA shift left one bit. SN741850, b, Examine each BCD decade. If the sum is ys ya ys v2 ¥1 greater than four, add three and shift left one bit. c. Repeat step b until the least-significant binary bit is in the least-significant BCD B AnD CG BOA location. Vee — mo So e21r aco ourrur TABLEN SNS41B5A, SN741858 FUNCTION TABLE _ PACKAGE COUNT AND DELAY TIMES: eiIvaRy| PUTS OUTPUTS. fon nan roc coven a aaa a PACKAGES | TOTAL DELAY TIME (oa) bret tty pew et ek Requineo | _1VP MAX ee erererer) Gren fer arerararanar’ Tork 3 50 80 eofounwetl ec [HH tEeeHEE 10 6 100 160 eofecmwcl co jwccweu wl Mey ia ba 125 200 wile Hoe Hw) t JH Ht EMH AO s 10 150 240 palonewel c [ww ewecee 2 15 “4 195 280 os a a rr) : ‘. bee ee Balianw ct] c int caew ee By 7 19 28 360 gosjew www] © |e wt HW ee a 18 a 2s 360 peafH ee cel © [HH EHH EEK 19 24 250 400 wate cium) oc fee cw Oo] ed 20 27 275, 440 wale cme) C Ih OHH OH e weso[d wn] oe [petro Fe Sa swoolhwe owl oc lee hon we welh hm welt Ih ww HEL ees[y Hw ww] Lid HW We GLH au [xx x x x] 4 [MH 4M WH MK OM a TEXAS %y 3.733 INSTRUMENTS
a “ . a - ! TYPES SN54184, SN54185A, SN74184, SN74185A. BCD-TO-BINARY AND BINARY-TO-BCD CONVERTERS ee absolute maximum ratings over operating free-air temperature range (unless otherwise noted) Supply voltage, Vcc seeNoteM) ee Ag | Operating free-air temperature range: SN54184,SNS4185A 2 BBC 10125°C $N74184,SN74185A 2 ee es OC TOC Storage temperaturerange . 68°C to 150°C NOTE 1: Voltage values are with rgpect t0 network ground terminal recommended operating conditions Pi een [min Nom wax [MIN NOM MAX| [Suppiyvottme. Vee as ss fas s s25[ vf [ Kowetevel output current, Igy 2 ima [Operating free-sir temperature, Ta fs as [oof *c | electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) [parameter ___|_Tes¥eonoiionst [wun wve!_wax [owt] [ Vita _Highevel inputvoitage Ca [ Wit Loerievel input wortage os | Wric _teput clamp voltage Vee wins =azma =i | i High-level output current Vcc = MIN, Vin= 2, ‘oH ViL=08V, VoH=55V Veo= MIN, Vin=2V, SCHR [1 Topat carentatmmnimammputvoraee Vcc MAXVi=S5V [tt ma | [tn —Higvtowt imputcurrent | Voc MAX, vga [Ao] [1__Lowievel input current ec MAX, Vis oay [tT ma Vec* MAX ma 4 corms [29] {© For consitions snown as WIN oF MAX, Uta the appropriate value specified Under recommended operating conditions for the applicable type MM fAlltypicel veluar ore ar Veco =SV. Ta 225°C S switching characteristics, Voc = 5 V, Ta = 25°C e [raramerer test conortions [win tve_max] untr | on CL 308F, [eso fe | Ry = 3009, [22s [os | Riz = 600.2, [a7 0 [os | See Figure tendNowe2 [2340 | ns ESF 3-734 TEXAS 3 INSTRUMENTS POST OFFICE BOX 225012 © DALLAS TEXAS 75265
. *- qt TYPES SN54184, SN54185A, SN74184, SN74185A BCD-TO-BINARY AND BINARY-TO-BCD CONVERTERS Ee schematics of inputs and outputs EQUIVALENT OF TYPICAL OF ALL INPUTS ALL OUTPUTS vec = OUTPUT exe - Nom a PARAMETER MEASUREMENT INFORMATION vec mur 3008 20pF FROM ouTPUT UNDER TEST co AL2$ 6000. Ci moe robe an iapecance. Loao cincurt % FIGURE 1 8 NOTE 2: See Gone Information Section for loed cuts and voltage wavetoms. a a E ee TEXAS % 3-735 INSTRUMENTS
TYPES SN54184, SN74184 BCD-TO-BINARY CONVERTERS EEE TYPICAL APPLICATION DATA | 'SN54184, SN74184 7 wo uo. 55 cs es As G4 ca 84 At 05 C3 G9 AS G2 G2 G2 ADDI C1G1 AT OO CO BO AD eo vs va va v2 vs} LT fe BA [naa [TI oren Dc eA [eve TTT LT 1 se eA] | eo ce a] | feo ee [11 [11 CT toe eA] | [eo ee a] | [eo ce a] |e oc 8 LT] [TI LT] rpc eA] [eo ce a] (fe oc ea] vs va va v2 ya) | [vs va va v2 va} | [vs va va v2 v1 - oo on Toe ea] | feo eel | Pe De LT I LT] [TI n EDCEA Eoced EDCBA w vs va va v2 vi vs va va v2 vi is} [TI [TI > vs va vs v2 vi} | [ys va v3 v2 va a [TI LT] a! an foe 8 A [TI Te eA [TI + ce 8A LSD—least significant decade Ww Each rectangle represents and SNS4184 or SN74184. open eee re ate ae “ 7 bl o bal 3 2 w bed FIGURE 4BCD-TO-BINARY CONVERTER FOR SIX BCD DECADES Se TEXAS ad 3-737 INSTRUMENTS.
ee _ i} TYPES SN54185A, SN74185A BINARY-TO-BCD CONVERTERS EE TYPICAL APPLICATION DATA $N54185A, SN74185A sinany ‘aco oa oa bt oo Go os a7 ee aso es 62 67 oY TT a TTT I LTT Tt Ty 1 => ee [we [Tt TiTiti tt a | LIITTITTit it ttt a fee) fe [LT TTT Tt I TTT I a lys_ye_ya_v2_v1 fs] S wee eee Ss er a so uso, a ecD rd FIGURE 9-16 BIT BINARY-TO-BcD E CONVERTER (SEE NOTE 8) MsD—most significant daca USD—ieat slniicene decade NOTES. A. Each rectonge represents an SNBATBEA or SN7ATBSA, B. Al unceed Inputs are grounded i TEXAS % 3-739 INSTRUMENTS ost OFFICE BOK 725012 # DALLAS, TEXAS 75265