? semiconductor components industries, llc, 2000 august, 2000 rev. 4 1 publication order number: mc14028b/d mc14028b bcd-to-decimal decoder binary-to-octal decoder the mc14028b decoder is constructed so that an 8421 bcd code on the four inputs provides a decimal (oneoften) decoded output, while a 3bit binary input provides a decoded octal (oneofeight) code output with d forced to a logic a0o. expanded decoding such as binarytohexadecimal (oneof16), etc., can be achieved by using other mc14028b devices. the part is useful for code conversion, address decoding, memory selection control, demultiplexing, or readout decoding. ? diode protection on all inputs ? supply voltage range = 3.0 vdc to 18 vdc ? capable of driving two lowpower ttl loads or one lowpower schottky ttl load over the rated temperature range ? positive logic design ? low outputs on all illegal input combinations ? similar to cd4028b. maximum ratings (voltages referenced to v ss ) (note 2.) symbol parameter value unit v dd dc supply voltage range 0.5 to +18.0 v v in , v out input or output voltage range (dc or transient) 0.5 to v dd + 0.5 v i in , i out input or output current (dc or transient) per pin 10 ma p d power dissipation, per package (note 3.) 500 mw t a ambient temperature range 55 to +125 c t stg storage temperature range 65 to +150 c t l lead temperature (8second soldering) 260 c 2. maximum ratings are those values beyond which damage to the device may occur. 3. temperature derating: plastic ap and d/dwo packages: 7.0 mw/ c from 65 c to 125 c this device contains protection circuitry to guard against damage due to high static voltages or electric fields. however, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages to this highimpedance circuit. for proper operation, v in and v out should be constrained to the range v ss (v in or v out ) v dd . unused inputs must always be tied to an appropriate logic voltage level (e.g., either v ss or v dd ). unused outputs must be left open. http://onsemi.com a = assembly location wl, l = wafer lot yy, y = year ww, w = work week device package shipping ordering information mc14028bcp pdip16 2000/box mc14028bd soic16 2400/box mc14028bdr2 soic16 2500/tape & reel 1. for ordering information on the eiaj version of the soic packages, please contact your local on semiconductor representative. marking diagrams 1 16 pdip16 p suffix case 648 mc14028bcp awlyyww soic16 d suffix case 751b 1 16 14028b awlyww soeiaj16 f suffix case 966 1 16 mc14028b alyw mc14028bf soeiaj16 see note 1. mc14028bfel soeiaj16 see note 1.
mc14028b http://onsemi.com 2 pin assignment 13 14 15 16 9 10 11 12 5 4 3 2 1 8 7 6 c b q1 q3 v dd q8 a d q7 q0 q2 q4 v ss q6 q5 q9 truth table d c b a q9q8q7q6q5q4q3q2q1q0 00000000000001 00010000000010 00100000000100 00110000001000 01000000010000 01010000100000 01100001000000 01110010000000 10000100000000 10011000000000 10100000000000 10110000000000 11000000000000 11010000000000 11100000000000 11110000000000 block diagram 8421 bcd inputs decimal decoded outputs octal decoded outputs 3 14 2 15 1 6 7 4 9 5 a b c dq9 q8 q7 q6 q5 q4 q3 q2 q1 q0 3-bit binary inputs 10 13 12 11 v dd = pin 16 v ss = pin 8
mc14028b http://onsemi.com 3 ????????????????????????????????? ????????????????????????????????? electrical characteristics (voltages referenced to v ss ) ?????????? ?????????? ???? ???? ??? ??? v dd ????? ????? 55 c ????????? ????????? 25 c ????? ????? 125 c ??? ??? ?????????? ?????????? characteristic ???? ???? symbol ??? ??? v dd vdc ??? ??? min ??? ??? max ???? ???? min ??? ??? typ (4.) ???? ???? max ??? ??? min ??? ??? max ??? ??? unit ?????????? ? ???????? ? ?????????? output voltage a0o level v in = v dd or 0 ???? ? ?? ? ???? v ol ??? ? ? ? ??? 5.0 10 15 ??? ? ? ? ??? e e e ??? ? ? ? ??? 0.05 0.05 0.05 ???? ? ?? ? ???? e e e ??? ? ? ? ??? 0 0 0 ???? ? ?? ? ???? 0.05 0.05 0.05 ??? ? ? ? ??? e e e ??? ? ? ? ??? 0.05 0.05 0.05 ??? ? ? ? ??? vdc ?????????? ? ???????? ? ?????????? a1o level v in = 0 or v dd ???? ? ?? ? ???? v oh ??? ? ? ? ??? 5.0 10 15 ??? ? ? ? ??? 4.95 9.95 14.95 ??? ? ? ? ??? e e e ???? ? ?? ? ???? 4.95 9.95 14.95 ??? ? ? ? ??? 5.0 10 15 ???? ? ?? ? ???? e e e ??? ? ? ? ??? 4.95 9.95 14.95 ??? ? ? ? ??? e e e ??? ? ? ? ??? vdc ?????????? ? ???????? ? ? ???????? ? ?????????? input voltage a0o level (v o = 4.5 or 0.5 vdc) (v o = 9.0 or 1.0 vdc) (v o = 13.5 or 1.5 vdc) ???? ? ?? ? ? ?? ? ???? v il ??? ? ? ? ? ? ? ??? 5.0 10 15 ??? ? ? ? ? ? ? ??? e e e ??? ? ? ? ? ? ? ??? 1.5 3.0 4.0 ???? ? ?? ? ? ?? ? ???? e e e ??? ? ? ? ? ? ? ??? 2.25 4.50 6.75 ???? ? ?? ? ? ?? ? ???? 1.5 3.0 4.0 ??? ? ? ? ? ? ? ??? e e e ??? ? ? ? ? ? ? ??? 1.5 3.0 4.0 ??? ? ? ? ? ? ? ??? vdc ?????????? ? ???????? ? ? ???????? ? ?????????? a1o level (v o = 0.5 or 4.5 vdc) (v o = 1.0 or 9.0 vdc) (v o = 1.5 or 13.5 vdc) ???? ? ?? ? ? ?? ? ???? v ih ??? ? ? ? ? ? ? ??? 5.0 10 15 ??? ? ? ? ? ? ? ??? 3.5 7.0 11 ??? ? ? ? ? ? ? ??? e e e ???? ? ?? ? ? ?? ? ???? 3.5 7.0 11 ??? ? ? ? ? ? ? ??? 2.75 5.50 8.25 ???? ? ?? ? ? ?? ? ???? e e e ??? ? ? ? ? ? ? ??? 3.5 7.0 11 ??? ? ? ? ? ? ? ??? e e e ??? ? ? ? ? ? ? ??? vdc ?????????? ? ???????? ? ? ???????? ? ? ???????? ? ?????????? output drive current (v oh = 2.5 vdc) source (v oh = 4.6 vdc) (v oh = 9.5 vdc) (v oh = 13.5 vdc) ???? ? ?? ? ? ?? ? ? ?? ? ???? i oh ??? ? ? ? ? ? ? ? ? ? ??? 5.0 5.0 10 15 ??? ? ? ? ? ? ? ? ? ? ??? 3.0 0.64 1.6 4.2 ??? ? ? ? ? ? ? ? ? ? ??? e e e e ???? ? ?? ? ? ?? ? ? ?? ? ???? 2.4 0.51 1.3 3.4 ??? ? ? ? ? ? ? ? ? ? ??? 4.2 0.88 2.25 8.8 ???? ? ?? ? ? ?? ? ? ?? ? ???? e e e e ??? ? ? ? ? ? ? ? ? ? ??? 1.7 0.36 0.9 2.4 ??? ? ? ? ? ? ? ? ? ? ??? e e e e ??? ? ? ? ? ? ? ? ? ? ??? madc ?????????? ? ???????? ? ?????????? (v ol = 0.4 vdc) sink (v ol = 0.5 vdc) (v ol = 1.5 vdc) ???? ? ?? ? ???? i ol ??? ? ? ? ??? 5.0 10 15 ??? ? ? ? ??? 0.64 1.6 4.2 ??? ? ? ? ??? e e e ???? ? ?? ? ???? 0.51 1.3 3.4 ??? ? ? ? ??? 0.88 2.25 8.8 ???? ? ?? ? ???? e e e ??? ? ? ? ??? 0.36 0.9 2.4 ??? ? ? ? ??? e e e ??? ? ? ? ??? madc ?????????? ?????????? input current ???? ???? i in ??? ??? 15 ??? ??? e ??? ??? 0.1 ???? ???? e ??? ??? 0.00001 ???? ???? 0.1 ??? ??? e ??? ??? 1.0 ??? ??? m adc ?????????? ? ???????? ? ?????????? input capacitance (v in = 0) ???? ? ?? ? ???? c in ??? ? ? ? ??? e ??? ? ? ? ??? e ??? ? ? ? ??? e ???? ? ?? ? ???? e ??? ? ? ? ??? 5.0 ???? ? ?? ? ???? 7.5 ??? ? ? ? ??? e ??? ? ? ? ??? e ??? ? ? ? ??? pf ?????????? ? ???????? ? ?????????? quiescent current (per package) ???? ? ?? ? ???? i dd ??? ? ? ? ??? 5.0 10 15 ??? ? ? ? ??? e e e ??? ? ? ? ??? 5.0 10 20 ???? ? ?? ? ???? e e e ??? ? ? ? ??? 0.005 0.010 0.015 ???? ? ?? ? ???? 5.0 10 20 ??? ? ? ? ??? e e e ??? ? ? ? ??? 150 300 600 ??? ? ? ? ??? m adc ?????????? ? ???????? ? ? ???????? ? ? ???????? ? ?????????? total supply current (5.) (6.) (dynamic plus quiescent, per package) (c l = 50 pf on all outputs, all buffers switching) ???? ? ?? ? ? ?? ? ? ?? ? ???? i t ??? ? ? ? ? ? ? ? ? ? ??? 5.0 10 15 ????????????????? ? ??????????????? ? ? ??????????????? ? ? ??????????????? ? ????????????????? i t = (0.3 m a/khz) f + i dd i t = (0.6 m a/khz) f + i dd i t = (0.9 m a/khz) f + i dd ??? ? ? ? ? ? ? ? ? ? ??? m adc 4. data labelled atypo is not to be used for design purposes but is intended as an indication of the ic's potential performance. 5. the formulas given are for the typical characteristics only at 25 c. 6. to calculate total supply current at loads other than 50 pf: i t (c l ) = i t (50 pf) + (c l 50) vfk where: i t is in m a (per package), c l in pf, v = (v dd v ss ) in volts, f in khz is input frequency, and k = 0.001. ????????????????????????????????? ????????????????????????????????? switching characteristics (7.) (c l = 50 pf, t a = 25 c) ??????????????? ??????????????? characteristic ????? ????? symbol ???? ???? v dd ???? ???? min ???? ???? typ (8.) ???? ???? max ??? ??? unit ??????????????? ? ????????????? ? ? ????????????? ? ??????????????? output rise and fall time t tlh , t thl = (1.5 ns/pf) c l + 25 ns t tlh , t thl = (0.75 ns/pf) c l + 12.5 ns t tlh , t thl = (0.55 ns/pf) c l + 9.5 ns ????? ? ??? ? ? ??? ? ????? t tlh , t thl ???? ? ?? ? ? ?? ? ???? 5.0 10 15 ???? ? ?? ? ? ?? ? ???? e e e ???? ? ?? ? ? ?? ? ???? 100 50 40 ???? ? ?? ? ? ?? ? ???? 200 100 80 ??? ? ? ? ? ? ? ??? ns ??????????????? ? ????????????? ? ? ????????????? ? ??????????????? propagation delay time t plh , t phl = (1.7 ns/pf) c l + 215 ns t plh , t phl = (0.66 ns/pf) c l + 97 ns t plh , t phl = (0.5 ns/pf) c l + 65 ns ????? ? ??? ? ? ??? ? ????? t plh , t phl ???? ? ?? ? ? ?? ? ???? 5.0 10 15 ???? ? ?? ? ? ?? ? ???? e e e ???? ? ?? ? ? ?? ? ???? 300 130 90 ???? ? ?? ? ? ?? ? ???? 600 260 180 ??? ? ? ? ? ? ? ??? ns 7. the formulas given are for the typical characteristics only at 25 c. 8. data labelled atypo is not to be used for design purposes but is intended as an indication of the ic's potential performance.
mc14028b http://onsemi.com 4 figure 1. dynamic signal waveforms inputs b, c, and d switching in respect to a bcd code. inputs a, b, and d low. all outputs connected to respective c l loads. f in respect to a system clock. 20 ns 20 ns 90% 50% 10% 1/f v dd v ss 20 ns 20 ns input a input c q4 10% 90% 50% v dd v ss v oh v ol t plh t phl t tlh t thl 50% 90% 10% logic diagram q9 q8 q7 q6 q5 q4 q3 q2 q1 q0 d c b a
mc14028b http://onsemi.com 5 applications information expanded decoding can be performed by using the mc14028b and other cmos integrated circuits. the circuit in figure 2 converts any 4bit code to a decimal or hexadecimal code. the accompanying table shows the input binary combinations, the associated aoutput numberso that go ahigho when selected, and the aredefined output numberso needed for the proper code. for example: for the combination dcba = 0111 the output number 7 is redefined for the 4bit binary, 4bit gray, excess3, or excess3 gray codes as 7, 5, 4, or 2, respectively. figure 3 shows a 6bit binary 1of64 decoder using nine mc14028b circuits and two mc14069ub inverters. the mc14028b can be used in decimal digit displays, such as, neon readouts or incandescent projection indicators as shown in figure 4. figure 2. code conversion circuit and truth table inputs d mc14028b cba dc b a dc b a mc14028b q9 q0 q9 q0 15 -8 15 -0 output numbers code and redefined output numbers hexadecimal decimal inputs output numbers d c b a 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 1 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 2 3 0 2 2 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 3 2 0 3 3 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 4 7 1 4 4 0 1 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 5 6 2 3 0 1 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 6 4 3 1 4 0 1 1 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 7 5 4 2 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 8 15 5 1 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 9 14 6 5 1 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 10 12 7 9 6 1 0 1 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 11 13 8 5 1 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 12 8 9 5 6 1 1 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 13 9 6 7 7 1 1 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 14 11 8 8 8 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 10 7 9 9 4bit binary 4bit gray excess3 excess3 gray aiken 4221
mc14028b http://onsemi.com 6 figure 3. sixbit binary 1of64 decoder inputs a b c d e f inhibit (no selection) a b c -d q0 q9 mc14028b abcd mc14028b q0 q9 ab cd mc14028b q0 q9 ab cd mc14028b q0 q9 ab cd mc14028b q0 q9 ab cd mc14028b q0 q9 abcd mc14028b q0 q9 abcd mc14028b q0 q9 abcd mc14028b q0 q9 7 0 8 15 16 23 24 31 32 39 40 47 48 55 56 63 *1/6 mc14069ub 64 outputs (selected output is high) figure 4. decimal digit display application a q9 mc14028b b c d q8 q7 q6 q5 q4 q3 q2 q1 q0 9 0 2 910 appropriate voltage neon display appropriate voltage incandescent display or
mc14028b http://onsemi.com 7 package dimensions pdip16 p suffix plastic dip package case 64808 issue r notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: inch. 3. dimension l to center of leads when formed parallel. 4. dimension b does not include mold flash. 5. rounded corners optional. a b f c s h g d j l m 16 pl seating 18 9 16 k plane t m a m 0.25 (0.010) t dim min max min max millimeters inches a 0.740 0.770 18.80 19.55 b 0.250 0.270 6.35 6.85 c 0.145 0.175 3.69 4.44 d 0.015 0.021 0.39 0.53 f 0.040 0.70 1.02 1.77 g 0.100 bsc 2.54 bsc h 0.050 bsc 1.27 bsc j 0.008 0.015 0.21 0.38 k 0.110 0.130 2.80 3.30 l 0.295 0.305 7.50 7.74 m 0 10 0 10 s 0.020 0.040 0.51 1.01 soic16 d suffix plastic soic package case 751b05 issue j 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
mc14028b http://onsemi.com 8 package dimensions h e a 1 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 9.90 10.50 0.390 0.413 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 --- 0.78 --- 0.031 a 1 h e q 1 l e 10 0 10 l e q 1 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). m l detail p view p c a b e m 0.13 (0.005) 0.10 (0.004) 1 16 9 8 d z e a b c d e e l m z soeiaj16 f suffix plastic eiaj soic package case 96601 issue o 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 central/south america: spanish phone : 3033087143 (monfri 8:00am to 5:00pm mst) email : onlitspanish@hibbertco.com asia/pacific : ldc for on semiconductor asia support phone : 3036752121 (tuefri 9:00am to 1:00pm, hong kong time) toll free from hong kong & singapore: 00180044223781 email : onlitasia@hibbertco.com japan : on semiconductor, japan customer focus center 4321 nishigotanda, shinagawaku, tokyo, japan 1410031 phone : 81357402745 email : r14525@onsemi.com on semiconductor website : http://onsemi.com for additional information, please contact your local sales representative. mc14028b/d north america 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 fax response line: 3036752167 or 8003443810 toll free usa/canada n. american technical support : 8002829855 toll free usa/canada europe: ldc for on semiconductor european support german phone : (+1) 3033087140 (monfri 2:30pm to 7:00pm cet) email : onlitgerman@hibbertco.com french phone : (+1) 3033087141 (monfri 2:00pm to 7:00pm cet) email : onlitfrench@hibbertco.com english phone : (+1) 3033087142 (monfri 12:00pm to 5:00pm gmt) email : onlit@hibbertco.com european tollfree access*: 0080044223781 *available from germany, france, italy, uk
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