MC74VHC259DR2G ON Semiconductor

MC74VHC259 8-Bit Addressable Latch/1-of-8 Decoder CMOS Logic Level Shifter with LSTTLCompatible Inputs MC74VHC259 4 Q0 1 5 A0 Q1 ADDRESS 6 2 Q2 A1 INPUTS 7 NONINVERTING Q3 3 A2 9 OUTPUTS Q4 10 Q5 13 11 DATA IN Q6 12 Q7 PIN 16 = V 15 CC RESET PIN 8 = GND 14 ENABLE Figure 2. Logic Diagram BIN/OCT DMUX 4 1 4 1 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 Q2 Q2 4 2 2 2 7 7 Q3 Q3 3 3 8 8 Q4 Q4 4 4 10 13 10 13 ID ID 5 Q5 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 LATCH SELECTION TABLE MODE SELECTION TABLE Address Inputs Enable Reset Mode 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