BU4028

Standard ICs BCD-to-decimal decoder BU4028B The BU4028B is a decoder which converts BCD signals to decimal signals. Of the ten outputs Q0 to Q9, those corresponding to the A to D input codes are set to “H”, and the others are all set to “L”. If inputs A to C are used and input D is used as disabled input, the BU4028B can also be used as a 1-of-8 decoder. Features 1) Low power dissipation. 2) Wide range of operating power supply voltages. 3) High input impedance. 4) High fan-out. 5) Direct drive of 2 L-TTL inputs and 1LS-TTL input. Block diagram Q4 1 16 VDD 15 Q3 Q4 Q2 Q0 3 Q0 Q7 4 Q7 Q9 Q5 Q5 Q6 6 Q6 Q8 7 10 A 9 Q8 Q1 B C D A 11 D 13 B Q3 14 Q1 Q2 2 Logic circuit diagram Q0 Q1 A B Q4 Q5 C Q6 Q7 IN D Q8 Q9 Q2 Q3 Q9 5 12 C VSS 8 1 Standard ICs BA4028B Truth table INPUT D L L L L L L L L H H H H H H H H C L L L L H H H H L L L L H H H H B L L H H L L H H L L H H L L H H A L H L H L H L H L H L H L H L H Q9 L L L L L L L L L H L L L L L L Q8 L L L L L L L L H L L L L L L L Q7 L L L L L L L H L L L L L L L L Q6 L L L L L L H L L L L L L L L L OUTPUT Q5 L L L L L H L L L L L L L L L L Q4 L L L L H L L L L L L L L L L L Q3 L L L H L L L L L L L L L L L L Q2 L L H L L L L L L L L L L L L L Q1 L H L L L L L L L L L L L L L L Q0 H L L L L L L L L L L L L L L L Absolute maximum ratings (Ta = 25°C, V Parameter Power supply voltage Power dissipation Operating temperature Storage temperature Input voltage Symbol VDD Pd Topr Tstg VIN SS = 0V) Limits – 0.3 ~ + 18 1000 (...