PAL18L4                                         PAL DESIGN SPECIFICATION
P7017 (SN54/74LS453)                       BIRKNER/KAZMI/BLASCO 03/10/81
QUAD 4:1 MULTIPLEXER
MMI SUNNYVALE, CALIFORNIA
1C0 1C1 1C2 1C3 2C0 2C1 2C2 2C3 3C0 3C1 3C2 GND
3C3 4C0 4C1 4C2  4Y  3Y  2Y  1Y 4C3  B   A  VCC

 
/1Y  =  /B*/A * /1C0                            ;SELECT INPUT 1C0
     +  /B* A * /1C1                            ;SELECT INPUT 1C1
     +   B*/A * /1C2                            ;SELECT INPUT 1C2
     +   B* A * /1C3                            ;SELECT INPUT 1C3
 
/2Y  =  /B*/A * /2C0                            ;SELECT INPUT 2C0
     +  /B* A * /2C1                            ;SELECT INPUT 2C1
     +   B*/A * /2C2                            ;SELECT INPUT 2C2
     +   B* A * /2C3                            ;SELECT INPUT 2C3
 
/3Y  =  /B*/A * /3C0                            ;SELECT INPUT 3C0
     +  /B* A * /3C1                            ;SELECT INPUT 3C1
     +   B*/A * /3C2                            ;SELECT INPUT 3C2
     +   B* A * /3C3                            ;SELECT INPUT 3C3
 
/4Y  =  /B*/A * /4C0                            ;SELECT INPUT 4C0
     +  /B* A * /4C1                            ;SELECT INPUT 4C1
     +   B*/A * /4C2                            ;SELECT INPUT 4C2
     +   B* A * /4C3                            ;SELECT INPUT 4C3


FUNCTION TABLE
 
B A 1C0 1C1 1C2 1C3 2C0 2C1 2C2 2C3 3C0 3C1 3C2 3C3 4C0 4C1 4C2 4C3 1Y 2Y 3Y 4Y
 
; SEL  --------INPUTS--------  --OUTPUTS--      COMMENTS
;       1C    2C    3C    4C
; B A  0123  0123  0123  0123  1Y 2Y 3Y 4Y
------------------------------------------------------------
  L L  LHHH  HHHH  HHHH  HHHH   L  H  H  H      1C0=0
  L L  HHHH  LHHH  HHHH  HHHH   H  L  H  H      2C0=0
  L L  HHHH  HHHH  LHHH  HHHH   H  H  L  H      3C0=0
  L L  HHHH  HHHH  HHHH  LHHH   H  H  H  L      4C0=0
  L L  HLLL  LLLL  LLLL  LLLL   H  L  L  L      1C0=1
  L L  LLLL  HLLL  LLLL  LLLL   L  H  L  L      2C0=1
  L L  LLLL  LLLL  HLLL  LLLL   L  L  H  L      3C0=1
  L L  LLLL  LLLL  LLLL  HLLL   L  L  L  H      4C0=1
  L L  HHHH  HHHH  HHHH  HHHH   H  H  H  H      TOGGLE LINES
  L H  HLHH  HHHH  HHHH  HHHH   L  H  H  H      1C1=0
  L H  HHHH  HLHH  HHHH  HHHH   H  L  H  H      2C1=0
  L H  HHHH  HHHH  HLHH  HHHH   H  H  L  H      3C1=0
  L H  HHHH  HHHH  HHHH  HLHH   H  H  H  L      4C1=0
  L H  LHLL  LLLL  LLLL  LLLL   H  L  L  L      1C1=1
  L H  LLLL  LHLL  LLLL  LLLL   L  H  L  L      2C1=1
  L H  LLLL  LLLL  LHLL  LLLL   L  L  H  L      3C1=1
  L H  LLLL  LLLL  LLLL  LHLL   L  L  L  H      4C1=1
  L H  HHHH  HHHH  HHHH  HHHH   H  H  H  H      TOGGLE LINES
  H L  HHLH  HHHH  HHHH  HHHH   L  H  H  H      1C2=0
  H L  HHHH  HHLH  HHHH  HHHH   H  L  H  H      2C2=0
  H L  HHHH  HHHH  HHLH  HHHH   H  H  L  H      3C2=0
  H L  HHHH  HHHH  HHHH  HHLH   H  H  H  L      4C2=0
  H L  LLHL  LLLL  LLLL  LLLL   H  L  L  L      1C2=1
  H L  LLLL  LLHL  LLLL  LLLL   L  H  L  L      2C2=1
  H L  LLLL  LLLL  LLHL  LLLL   L  L  H  L      3C2=1
  H L  LLLL  LLLL  LLLL  LLHL   L  L  L  H      4C2=1
  H L  HHHH  HHHH  HHHH  HHHH   H  H  H  H      TOGGLE LINES
  H H  HHHL  HHHH  HHHH  HHHH   L  H  H  H      1C3=0
  H H  HHHH  HHHL  HHHH  HHHH   H  L  H  H      2C3=0
  H H  HHHH  HHHH  HHHL  HHHH   H  H  L  H      3C3=0
  H H  HHHH  HHHH  HHHH  HHHL   H  H  H  L      4C3=0
  H H  LLLH  LLLL  LLLL  LLLL   H  L  L  L      1C3=1
  H H  LLLL  LLLH  LLLL  LLLL   L  H  L  L      2C3=1
  H H  LLLL  LLLL  LLLH  LLLL   L  L  H  L      3C3=1
  H H  LLLL  LLLL  LLLL  LLLH   L  L  L  H      4C3=1
  H H  HHHH  HHHH  HHHH  HHHH   H  H  H  H      TOGGLE LINES
 -----------------------------------------------------------

 
DESCRIPTION
 
THIS IS AN EXAMPLE OF A QUAD 4-TO-1 MULTIPLEXER USING A PAL18L4.  SELECT
LINES A,B ARE ENCODED IN BINARY, WITH A REPRESENTING THE LSB.

      OPERATIONS TABLE:

      INPUT    OUTPUTS
      SELECT
       B  A      Y
      ----------------
       L  L      C0
       L  H      C1
       H  L      C2
       H  H      C3
      ----------------

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