74HC131
74HC131 is 3-to-8-line Decoder/Demultiplexer manufactured by Hitachi Semiconductor.
Description
The HD74HC131 is 3-to-8 linedecoder. It has Address select inputs (A,B,C) and D type register. Address select data store to D type registers, during the positive going transition of the clock pulse. Output control (G 1, G2) are independent of select input and CLK input, and when G1 is low or G2 = High, all outputs is high.
Features
- High Speed Operation: tpd (CLK to Y) = 20 ns typ (CL = 50 p F)
- High Output Current: Fanout of 10 LSTTL Loads
- Wide Operating Voltage: VCC = 2 V to 6 V
- Low Input Current: 1 µA max
- Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)
HD74HC131
Function Table
Inputs
Enable
Select
Outputs
CLK G1 G2
Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
XX H X X X H H H H H H H H
XL X X X X H H H H H H H H
H L L L L L H H HH H HH
H L L L H HL H HH H HH
H L L H L HH L HH H HH
H L L H H HH H L H H HH
H L HL L HH H HL H HH
H L HL H HH H HH L HH
H L HH L HH H HH H L H
H L HH H HH H HH H HL
Outputs corresponding to stored address, L; all others H
Pin Arrangement
A1 B2 C3 CLK 4 G2 5 G1 6 Y7 7 GND 8
(Top view)
16 VCC 15 Y0 14 Y1 13 Y2 12 Y3 11 Y4 10 Y5 9 Y6
Logic...