? semiconductor components industries, llc, 2014 august, 2014 ? rev. 9 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 (one?of?ten) decoded output, while a 3?bit binary input provides a decoded octal (one?of?eight) code output with d forced to a logic ?0?. expanded decoding such as binary?to?hexadecimal (one?of?sixteen), 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. features ? diode protection on all inputs ? supply voltage range = 3.0 vdc to 18 vdc ? capable of driving two low?power ttl loads or one low?power schottky ttl load over the rated temperature range ? positive logic design ? low outputs on all illegal input combinations ? similar to cd4028b ? nlv prefix for automotive and other applications requiring unique site and control change requirements; aec?q100 qualified and ppap capable ? this device is pb?free and is rohs compliant maximum ratings (voltages referenced to v ss ) parameter symbol value unit dc supply voltage range v dd ?0.5 to +18.0 v input or output voltage range (dc or transient) v in , v out ?0.5 to v dd + 0.5 v input or output current (dc or transient) per pin i in , i out 10 ma power dissipation per package (note 1) p d 500 mw ambient temperature range t a ?55 to +125 c storage temperature range t stg ?65 to +150 c lead temperature (8?second soldering) t l 260 c stresses exceeding those listed in the maximum ratings table may damage the device. if any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. 1. temperature derating: ?d/dw? 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 high?impedance 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 see detailed ordering and shipping information in the package dimensions section on page 2 of this data sheet. ordering information a = assembly location wl = wafer lot yy, y = year ww = work week g = pb?free package marking diagram soic?16 d suffix case 751b 1 16 14028bg awlyww 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
mc14028b http://onsemi.com 2 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 ordering information device package shipping ? mc14028bdg soic?16 (pb?free) 48 units / rail MC14028BDR2G soic?16 (pb?free) 2500 / tape & reel nlv14028bdr2g* soic?16 (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. *nlv prefix for automotive and other applications requiring unique site and control change requirements; aec?q100 qualified and ppap capable.
mc14028b http://onsemi.com 3 ????????????????????????????????? ????????????????????????????????? (voltages referenced to v ss ) characteristic symbo l v dd vdc ?55 c 25 c 125 c unit min max min typ (note 2) max min max output voltage ?0? leve l v in = v dd or 0 ?1? leve l v in = 0 or v dd v ol 5.0 10 15 ? ? ? 0.05 0.05 0.05 ? ? ? 0 0 0 0.05 0.05 0.05 ? ? ? 0.05 0.05 0.05 vdc v oh 5.0 10 15 4.95 9.95 14.95 ? ? ? 4.95 9.95 14.95 5.0 10 15 ? ? ? 4.95 9.95 14.95 ? ? ? vdc input voltage ?0? leve l (v o = 4.5 or 0.5 vdc) (v o = 9.0 or 1.0 vdc) (v o = 13.5 or 1.5 vdc) ?1? leve l (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 il 5.0 10 15 ? ? ? 1.5 3.0 4.0 ? ? ? 2.25 4.50 6.75 1.5 3.0 4.0 ? ? ? 1.5 3.0 4.0 vdc v ih 5.0 10 15 3.5 7.0 11 ? ? ? 3.5 7.0 11 2.75 5.50 8.25 ? ? ? 3.5 7.0 11 ? ? ? 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) (v ol = 0.4 vdc) sin k (v ol = 0.5 vdc) (v ol = 1.5 vdc) i oh 5.0 5.0 10 15 ?3.0 ?0.64 ?1.6 ?4.2 ? ? ? ? ?2.4 ?0.51 ?1.3 ?3.4 ?4.2 ?0.88 ?2.25 ?8.8 ? ? ? ?1.7 ?0.36 ?0.9 ?2.4 ? ? ? ? madc i ol 5.0 10 15 0.64 1.6 4.2 ? ? ? 0.51 1.3 3.4 0.88 2.25 8.8 ? ? ? 0.36 0.9 2.4 ? ? ? madc input current i in 15 ? 0.1 ? 0.00001 0.1 ? 1.0 adc input capacitance (v in = 0) c in ? ? ? ? 5.0 7.5 ? ? pf quiescent current (per package) i dd 5.0 10 15 ? ? ? 5.0 10 20 ? ? ? 0.005 0.010 0.015 5.0 10 20 ? ? ? 150 300 600 adc total supply current (note 3, 4) (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 a/khz) f + i dd i t = (0.6 a/khz) f + i dd i t = (0.9 a/khz) f + i dd adc 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. 2. data labelled ?typ? is not to be used for design purposes but is intended as an indication of the ic?s potential performance. 3. the formulas given are for the typical characteristics only at 25 c. 4. 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 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 (note 5) (c l = 50 pf, t a = 25 c) characteristic symbol v dd min typ (note 6) 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 ? ? ? 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 ? ? ? 300 130 90 600 260 180 ns 5. the formulas given are for the typical characteristics only at 25 c. 6. data labelled ?typ? 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 applications information expanded decoding can be performed by using the mc14028b and other cmos integrated circuits. the circuit in figure 2 converts any 4?bit code to a decimal or hexadecimal code. the accompanying table shows the input binary combinations, the associated ?output numbers? that go ?high? when selected, and the ?redefined output numbers? needed for the proper code. for example: for the combination dcba = 0111 the output number 7 is redefined for the 4?bit binary, 4?bit gray, excess?3, or excess?3 gray codes as 7, 5, 4, or 2, respectively. figure 3 shows a 6?bit binary 1?of?64 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
mc14028b http://onsemi.com 5 inputs output numbers code and redefined output numbers hexadecimal decimal 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 figure 3. six?bit binary 1?of?64 decoder inputs a b c d e f inhibit (no selection) a b c -d q0 q9 mc14028b ab cd mc14028b q0 q9 ab cd mc14028b q0 q9 abcd mc14028b q0 q9 abcd mc14028b q0 q9 abcd 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 4?bit binary 4?bit gray excess?3 excess?3 gray aiken 4221
mc14028b http://onsemi.com 6 package dimensions soic?16 d suffix case 751b?05 issue k 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 6.40 16x 0.58 16x 1.12 1.27 dimensions: millimeters 1 pitch soldering footprint* 16 89 8x *for additional information on our pb?free strategy and soldering details, please download the on semiconductor soldering and mounting techniques reference manual, solderrm/d. 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 shall indemni fy and hold scillc and its officers, em ployees, 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 mc14028b/d literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 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
|
