MC74VHCT259ADR2G ON Semiconductor

MC74VHCT259A 8-Bit Addressable Latch/1-of-8 Decoder CMOS Logic Level Shifter with LSTTLCompatible Inputs MC74VHCT259A 4 Q0 1 5 A0 A0 1 16 Q1 V CC ADDRESS 6 2 Q2 2 15 A1 A1 RESET INPUTS 7 NONINVERTING Q3 3 3 14 A2 ENABLE A2 9 OUTPUTS Q4 4 13 Q0 DATA IN 10 Q5 13 DATA IN 11 Q1 Q7 5 12 Q6 12 Q2 6 11 Q6 Q7 Q3 7 10 Q5 PIN 16 = V CC 15 Q4 GND 8 9 RESET PIN 8 = GND 14 ENABLE Figure 2. Pin Assignment Figure 1. Logic Diagram BIN/OCT DMUX 1 1 4 4 A0 A0 1 0 Q0 0 0 Q0 5 2 0 5 2 A1 A1 2 1 Q1 G 1 Q1 7 6 3 6 3 A2 A2 4 2 Q2 2 2 Q2 7 7 Q3 Q3 3 3 8 8 Q4 Q4 4 4 10 13 10 13 ID 5 Q5 ID 5 Q5 11 14 11 14 EN Q6 EN Q6 6 6 12 15 12 15 R R 7 Q7 7 Q7 Figure 3. IEC Logic Symbol MODE SELECTION TABLE LATCH SELECTION TABLE Enable Reset Mode Address Inputs Latch Addressed A CB L H Addressable Latch H H Memory L L L Q0 L L 8Line Demultiplexer L L H Q1 HL Reset L H L Q2 L H H Q3 H L L Q4 H L H Q5 H H L Q6 H H H Q7