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-16), 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. http://onsemi.com MARKING DIAGRAMS 16 * 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 * * * PDIP-16 P SUFFIX CASE 648 MC14028BCP AWLYYWW 1 Schottky TTL Load Over the Rated Temperature Range Positive Logic Design Low Outputs on All Illegal Input Combinations Similar to CD4028B. 16 SOIC-16 D SUFFIX CASE 751B 14028B AWLYWW 1 MAXIMUM RATINGS (Voltages Referenced to VSS) (Note 2.) Value Unit -0.5 to +18.0 V -0.5 to VDD + 0.5 V Input or Output Current (DC or Transient) per Pin 10 mA PD Power Dissipation, per Package (Note 3.) 500 mW TA Ambient Temperature Range -55 to +125 C Tstg Storage Temperature Range -65 to +150 C TL Lead Temperature (8-Second Soldering) 260 C Symbol VDD Vin, Vout Iin, Iout Parameter 16 DC Supply Voltage Range Input or Output Voltage Range (DC or Transient) 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, Vin and Vout should be constrained to the range VSS (Vin or Vout) VDD. Unused inputs must always be tied to an appropriate logic voltage level (e.g., either VSS or VDD). Unused outputs must be left open. August, 2000 - Rev. 4 1 MC14028B ALYW 1 A WL, L YY, Y WW, W = Assembly Location = Wafer Lot = Year = Work Week ORDERING INFORMATION Device 2. Maximum Ratings are those values beyond which damage to the device may occur. 3. Temperature Derating: Plastic "P and D/DW" Packages: - 7.0 mW/C From 65C To 125C Semiconductor Components Industries, LLC, 2000 SOEIAJ-16 F SUFFIX CASE 966 Package Shipping MC14028BCP PDIP-16 2000/Box MC14028BD SOIC-16 2400/Box MC14028BDR2 SOIC-16 2500/Tape & Reel MC14028BF SOEIAJ-16 See Note 1. MC14028BFEL SOEIAJ-16 See Note 1. 1. For ordering information on the EIAJ version of the SOIC packages, please contact your local ON Semiconductor representative. Publication Order Number: MC14028B/D MC14028B PIN ASSIGNMENT Q4 1 16 VDD Q2 2 15 Q3 Q0 3 14 Q1 Q7 4 13 B Q9 5 12 C Q5 6 11 D Q6 7 10 A VSS 8 9 Q8 TRUTH TABLE D C B A Q9 Q8 Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 1 0 0 1 0 0 0 0 0 0 0 1 1 1 1 0 0 1 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 1 1 0 1 0 1 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 1 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 BLOCK DIAGRAM 8421 BCD INPUTS 3-BIT BINARY INPUTS 10 A 13 B 12 C 11 D Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 VDD = PIN 16 VSS = PIN 8 http://onsemi.com 2 3 14 2 15 1 6 7 4 9 5 OCTAL DECODED OUTPUTS DECIMAL DECODED OUTPUTS MC14028B IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIII IIII III IIIII IIIIIIIII IIIII III IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIII IIII III III III I III III IIII III III III IIIII IIIIIIIII IIIII IIIIIIIIII IIII III III III IIII III IIII III III III IIIIIIIIII IIII III III III IIII III IIII III III III IIIIIIIIII IIII III III III IIII III IIII III III III IIIIIIIIII IIII III III III IIII III IIII III III III IIIIIIIIII IIII III III III IIII III IIII III III III IIIIIIIIII IIII III III III IIII III IIII III III III IIIIIIIIII IIII III III III IIII III IIII III III III IIIIIIIIII IIII III III III IIII III IIII III III III IIIIIIIIII IIII III III III IIII III IIII III III III IIIIIIIIII IIII III III III IIII III IIII III III III IIIIIIIIII IIII III III III IIII III IIII III III III IIIIIIIIII IIII III III III IIII III IIII III III III IIIIIIIIII IIII III III III IIII III IIII III III III IIIIIIIIII IIII III III III IIII III IIII III III III IIIIIIIIII IIII III III III IIII III IIII III III III IIIIIIIIII IIII III III III IIII III IIII III III III IIIIIIIIII IIII III III III IIII III IIII III III III IIIIIIIIII IIII III III III IIII III IIII III III III IIIIIIIIII IIII III III III IIII III IIII III III III IIIIIIIIII IIII III III III IIII III IIII III III III IIIIIIIIII IIII III III III IIII III IIII III III III IIIIIIIIIIIIIIIII IIIIIIIIII IIII III III III IIII III IIII III III III IIIIIIIIII IIII III IIIIIIIIIIIIIIIII III IIIIIIIIII IIII III IIIIIIIIIIIIIIIII III IIIIIIIIII IIII III IIIIIIIIIIIIIIIII III IIIIIIIIII IIII III IIIIIIIIIIIIIIIII III ELECTRICAL CHARACTERISTICS (Voltages Referenced to VSS) - 55C 25C 125C VDD Vdc Min Max Min Typ (4.) Max Min Max Unit -- -- -- 0.05 0.05 0.05 -- -- -- 0 0 0 0.05 0.05 0.05 -- -- -- 0.05 0.05 0.05 Vdc VOL 5.0 10 15 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 VOH 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 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 -- -- -- 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 -- -- -- -- 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 IOL Input Current Iin 15 -- 0.1 -- 0.00001 0.1 -- 1.0 Adc Input Capacitance (Vin = 0) Cin -- -- -- -- 5.0 7.5 -- -- pF Quiescent Current (Per Package) IDD 5.0 10 15 -- -- -- 5.0 10 20 -- -- -- 0.005 0.010 0.015 5.0 10 20 -- -- -- 150 300 600 Adc IT 5.0 10 15 Characteristic Output Voltage Vin = VDD or 0 Symbol "0" Level "1" Level Vin = 0 or VDD Input Voltage "0" Level (VO = 4.5 or 0.5 Vdc) (VO = 9.0 or 1.0 Vdc) (VO = 13.5 or 1.5 Vdc) Vdc VIL Vdc "1" Level (VO = 0.5 or 4.5 Vdc) (VO = 1.0 or 9.0 Vdc) (VO = 1.5 or 13.5 Vdc) Output Drive Current (VOH = 2.5 Vdc) (VOH = 4.6 Vdc) (VOH = 9.5 Vdc) (VOH = 13.5 Vdc) (VOL = 0.4 Vdc) (VOL = 0.5 Vdc) (VOL = 1.5 Vdc) VIH mAdc Source IOH Sink Total Supply Current (5.) (6.) (Dynamic plus Quiescent, Per Package) (CL = 50 pF on all outputs, all buffers switching) IT = (0.3 A/kHz) f + IDD IT = (0.6 A/kHz) f + IDD IT = (0.9 A/kHz) f + IDD Adc 4. Data labelled "Typ" 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 25C. 6. To calculate total supply current at loads other than 50 pF: IT(CL) = IT(50 pF) + (CL - 50) Vfk where: IT is in A (per package), CL in pF, V = (VDD - VSS) in volts, f in kHz is input frequency, and k = 0.001. IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIII IIIII IIII IIII IIII IIII III IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIII IIIII IIII IIII IIII IIII III IIIIIIIIIIIIIII IIIII IIII IIII IIII IIII III IIIIIIIIIIIIIII IIIII IIII IIII IIII IIII III IIIIIIIIIIIIIII IIIII IIII IIII IIII IIII III IIIIIIIIIIIIIII IIIII IIII IIII IIII IIII III IIIIIIIIIIIIIII IIIII IIII IIII IIII IIII III IIIIIIIIIIIIIII IIIII IIII IIII IIII IIII III SWITCHING CHARACTERISTICS (7.) (CL = 50 pF, TA = 25C) Characteristic Symbol Output Rise and Fall Time tTLH, tTHL = (1.5 ns/pF) CL + 25 ns tTLH, tTHL = (0.75 ns/pF) CL + 12.5 ns tTLH, tTHL = (0.55 ns/pF) CL + 9.5 ns tTLH, tTHL Propagation Delay Time tPLH, tPHL = (1.7 ns/pF) CL + 215 ns tPLH, tPHL = (0.66 ns/pF) CL + 97 ns tPLH, tPHL = (0.5 ns/pF) CL + 65 ns tPLH, tPHL VDD Min Typ (8.) Max 5.0 10 15 -- -- -- 100 50 40 200 100 80 5.0 10 15 -- -- -- 300 130 90 600 260 180 Unit ns ns 7. The formulas given are for the typical characteristics only at 25C. 8. Data labelled "Typ" is not to be used for design purposes but is intended as an indication of the IC's potential performance. http://onsemi.com 3 MC14028B 20 ns Inputs B, C, and D switching in respect to a BCD code. 20 ns 90% INPUT A 10% 50% VSS 1/f 20 ns 90% INPUT C 20 ns tPLH tPHL VSS VOH 90% Q4 VDD 50% 10% Inputs A, B, and D low. All outputs connected to respective CL loads. f in respect to a system clock. VDD 50% 10% tTLH tTHL VOL Figure 1. Dynamic Signal Waveforms LOGIC DIAGRAM Q0 Q1 A Q2 Q3 B Q4 Q5 C Q6 Q7 D Q8 Q9 http://onsemi.com 4 MC14028B INPUTS APPLICATIONS INFORMATION D 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. D C B A D MC14028B Q9 B A C B A MC14028B Q0 15 C Q9 Q0 -8 15 -0 OUTPUT NUMBERS Figure 2. Code Conversion Circuit and Truth Table Code and Redefined Output Numbers B A 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 0 0 0 0 0 1 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 1 0 0 1 0 0 0 0 1 2 3 0 1 3 2 0 0 0 0 0 1 1 1 1 0 0 1 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4 5 6 7 7 6 4 5 1 2 3 4 1 1 1 1 0 0 0 0 0 0 1 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 8 9 10 11 15 14 12 13 5 6 7 8 1 1 1 1 1 1 1 1 0 0 1 1 0 1 0 1 0 0 0 1 0 0 1 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 12 13 14 15 8 9 11 10 9 http://onsemi.com 5 4221 C 0 0 0 0 Aiken D Decimal Excess-3 Gray Output Numbers Excess-3 Inputs 4-Bit Binary 4-Bit Gray Hexadecimal 0 3 0 1 2 3 0 1 2 4 4 3 4 1 2 5 6 9 5 5 6 8 7 6 7 8 9 7 8 9 MC14028B INPUTS A B C D E F INHIBIT A B C MC14028B -D Q0 (NO SELECTION) Q9 A B C D A B C D A B C D A B C D A B C D A B C D A B C D A B C D MC14028B MC14028B MC14028B MC14028B MC14028B MC14028B MC14028B MC14028B Q9 Q9 Q0 Q9 Q0 Q9 Q0 Q9 Q0 Q9 Q0 Q9 Q0 Q0 Q9 Q0 0 7 8 *1/6 MC14069UB 15 16 23 24 31 32 39 40 47 48 55 56 63 64 OUTPUTS (SELECTED OUTPUT IS HIGH) Figure 3. Six-Bit Binary 1-of-64 Decoder A B C D MC14028B Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 APPROPRIATE VOLTAGE APPROPRIATE VOLTAGE INCANDESCENT DISPLAY NEON DISPLAY OR 0 9 9 Figure 4. Decimal Digit Display Application http://onsemi.com 6 2 1 0 MC14028B PACKAGE DIMENSIONS PDIP-16 P SUFFIX PLASTIC DIP PACKAGE CASE 648-08 ISSUE R -A- 16 9 1 8 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. B F C DIM A B C D F G H J K L M S L S -T- SEATING PLANE K H G D M J 16 PL 0.25 (0.010) M T A M 16 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. 9 -B- 1 P 8 PL 0.25 (0.010) 8 M B S G R K F X 45 C SEATING PLANE J M D 16 PL 0.25 (0.010) MILLIMETERS MIN MAX 18.80 19.55 6.35 6.85 3.69 4.44 0.39 0.53 1.02 1.77 2.54 BSC 1.27 BSC 0.21 0.38 2.80 3.30 7.50 7.74 0 10 0.51 1.01 SOIC-16 D SUFFIX PLASTIC SOIC PACKAGE CASE 751B-05 ISSUE J -A- -T- INCHES MIN MAX 0.740 0.770 0.250 0.270 0.145 0.175 0.015 0.021 0.040 0.70 0.100 BSC 0.050 BSC 0.008 0.015 0.110 0.130 0.295 0.305 0 10 0.020 0.040 M T B S A S http://onsemi.com 7 DIM A B C D F G J K M P R MILLIMETERS MIN MAX 9.80 10.00 3.80 4.00 1.35 1.75 0.35 0.49 0.40 1.25 1.27 BSC 0.19 0.25 0.10 0.25 0 7 5.80 6.20 0.25 0.50 INCHES MIN MAX 0.386 0.393 0.150 0.157 0.054 0.068 0.014 0.019 0.016 0.049 0.050 BSC 0.008 0.009 0.004 0.009 0 7 0.229 0.244 0.010 0.019 MC14028B PACKAGE DIMENSIONS SOEIAJ-16 F SUFFIX PLASTIC EIAJ SOIC PACKAGE CASE 966-01 ISSUE O 16 LE 9 Q1 M E HE 1 8 L DETAIL P Z D e VIEW P A A1 b 0.13 (0.005) c M 0.10 (0.004) 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). DIM A A1 b c D E e HE L LE M Q1 Z MILLIMETERS MIN MAX --2.05 0.05 0.20 0.35 0.50 0.18 0.27 9.90 10.50 5.10 5.45 1.27 BSC 7.40 8.20 0.50 0.85 1.10 1.50 10 0 0.70 0.90 --0.78 INCHES MIN MAX --0.081 0.002 0.008 0.014 0.020 0.007 0.011 0.390 0.413 0.201 0.215 0.050 BSC 0.291 0.323 0.020 0.033 0.043 0.059 10 0 0.028 0.035 --0.031 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. 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