PLE5P8                                             PLE DESIGN SPECIFICATION
P5003                                                    FRANK LEE 30/15/83
EXPANDABLE 3-TO-8 DEMULTIPLEXER
MMI SANTA CLARA, CALIFORNIA
.ADD S2 S1 S0 DI PO
.DAT Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0


Y7 =  PO *  DI *  S2 *  S1 *  S0        ; ACTIVE HIGH, SELECT 7
   + /PO *  DI                          ; ACTIVE LOW, DI INACTIVE
   + /PO       * /S2                    ; ACTIVE LOW, SELECT 0-3
   + /PO             * /S1              ; ACTIVE LOW, SELECT 0,1,4,5
   + /PO                   * /S0        ; ACTIVE LOW, SELECT 0,2,4,6

Y6 =  PO *  DI *  S2 *  S1 * /S0        ; ACTIVE HIGH, SELECT 6
   + /PO *  DI                          ; ACTIVE LOW, DI INACTIVE
   + /PO       * /S2                    ; ACTIVE LOW, SELECT 0-3
   + /PO             * /S1              ; ACTIVE LOW, SELECT 0,1,4,5
   + /PO                   *  S0        ; ACTIVE LOW, SELECT 1,3,5,7

Y5 =  PO *  DI *  S2 * /S1 *  S0        ; ACTIVE HIGH, SELECT 5
   + /PO *  DI                          ; ACTIVE LOW, DI INACTIVE
   + /PO       * /S2                    ; ACTIVE LOW, SELECT 0-3
   + /PO             *  S1              ; ACTIVE LOW, SELECT 2,3,6,7
   + /PO                   * /S0        ; ACTIVE LOW, SELECT 0,2,4,6

Y4 =  PO *  DI *  S2 * /S1 * /S0        ; ACTIVE HIGH, SELECT 4
   + /PO *  DI                          ; ACTIVE LOW, DI INACTIVE
   + /PO       * /S2                    ; ACTIVE LOW, SELECT 0-3
   + /PO             *  S1              ; ACTIVE LOW, SELECT 2,3,6,7
   + /PO                   *  S0        ; ACTIVE LOW, SELECT 1,3,5,7

Y3 =  PO *  DI * /S2 *  S1 *  S0        ; ACTIVE HIGH, SELECT 3
   + /PO *  DI                          ; ACTIVE LOW, DI INACTIVE
   + /PO       *  S2                    ; ACTIVE LOW, SELECT 4-7
   + /PO             * /S1              ; ACTIVE LOW, SELECT 0,1,4,5
   + /PO                   * /S0        ; ACTIVE LOW, SELECT 0,2,4,6

Y2 =  PO *  DI * /S2 *  S1 * /S0        ; ACTIVE HIGH, SELECT 2
   + /PO *  DI                          ; ACTIVE LOW, DI INACTIVE
   + /PO       *  S2                    ; ACTIVE LOW, SELECT 4-7
   + /PO             * /S1              ; ACTIVE LOW, SELECT 0,1,4,5
   + /PO                   *  S0        ; ACTIVE LOW, SELECT 1,3,5,7

Y1 =  PO *  DI * /S2 * /S1 *  S0        ; ACTIVE HIGH, SELECT 1
   + /PO *  DI                          ; ACTIVE LOW, DI INACTIVE
   + /PO       *  S2                    ; ACTIVE LOW, SELECT 4-7
   + /PO             *  S1              ; ACTIVE LOW, SELECT 2,3,6,7
   + /PO                   * /S0        ; ACTIVE LOW, SELECT 0,2,4,6

Y0 =  PO *  DI * /S2 * /S1 * /S0        ; ACTIVE HIGH, SELECT 0
   + /PO *  DI                          ; ACTIVE LOW, DI INACTIVE
   + /PO       *  S2                    ; ACTIVE LOW, SELECT 4-7
   + /PO             *  S1              ; ACTIVE LOW, SELECT 2,3,6,7
   + /PO                   *  S0        ; ACTIVE LOW, SELECT 1,3,5,7


FUNCTION TABLE

PO DI S2 S1 S0 Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0

;P D SSS  YYYYYYYY
;O I 210  76543210     COMMENTS
--------------------------------------------
 H L XXX  LLLLLLLL     DATA INPUT = 0
 H H LLL  LLLLLLLH     SELECT OUTPUT 0
 H H LLH  LLLLLLHL     SELECT OUTPUT 1
 H H LHL  LLLLLHLL     SELECT OUTPUT 2
 H H LHH  LLLLHLLL     SELECT OUTPUT 3
 H H HLL  LLLHLLLL     SELECT OUTPUT 4
 H H HLH  LLHLLLLL     SELECT OUTPUT 5
 H H HHL  LHLLLLLL     SELECT OUTPUT 6
 H H HHH  HLLLLLLL     SELECT OUTPUT 7
 L H XXX  HHHHHHHH     DATA INPUT = 0
 L L LLL  HHHHHHHL     SELECT OUTPUT 0
 L L LLH  HHHHHHLH     SELECT OUTPUT 1
 L L LHL  HHHHHLHH     SELECT OUTPUT 2
 L L LHH  HHHHLHHH     SELECT OUTPUT 3
 L L HLL  HHHLHHHH     SELECT OUTPUT 4
 L L HLH  HHLHHHHH     SELECT OUTPUT 5
 L L HHL  HLHHHHHH     SELECT OUTPUT 6
 L L HHH  LHHHHHHH     SELECT OUTPUT 7
--------------------------------------------


DESCRIPTION

THIS PLE5P8 IMPLEMENTS A 3-TO-8 DEMULTIPLEXER.  THE DEVICE WILL DEMULTIPLEX
THREE SELECT SIGNALS (S2-S0) INTO EIGHT OUTPUTS (Y7-Y0) USING THE INPUT DI
WITH POLARITY SELECT PO.  THIS CHIP ALSO HAS CASCADABLE CAPABILITY AND
THREE-STATE OUTPUTS.

PIN ASSIGNMENTS:

1. PO      HIGH INDICATES OUTPUT IS ACTIVE HIGH. LOW INDICATES OUTPUT IS
           ACTIVE LOW.
2. DI      DATA INPUT (DEMULTIPLEXING INPUT).  ACTIVE LOW IF PO IS LOW.
3. S2-S0   SELECT PINS. S2 IS THE MOST SIGNIFICANT BIT. ACTIVE HIGH
           REGARDLESS OF PO.
4. Y7-Y0   OUTPUTS.  CAN BE ACTIVE HIGH OR ACTIVE LOW DEPENDING ON PO.
           ACTIVE LOW IF PO IS LOW.