PAL20L10 PAL DESIGN SPECIFICATION P7071 VINCENT COLI 10/21/81 10-BIT OPEN COLLECTOR INVERTING BUFFER MMI SUNNYVALE, CALIFORNIA /OC1 D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 GND /OC2 Y9 Y8 Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0 VCC IF(OC1* D0) /Y0 = VCC ;Y0= /D0 (COMP) IF(OC1* D1) /Y1 = VCC ;Y1= /D1 (COMP) IF(OC1* D2) /Y2 = VCC ;Y2= /D2 (COMP) IF(OC1* D3) /Y3 = VCC ;Y3= /D3 (COMP) IF(OC1* D4) /Y4 = VCC ;Y4= /D4 (COMP) IF(OC2* D5) /Y5 = VCC ;Y5= /D5 (COMP) IF(OC2* D6) /Y6 = VCC ;Y6= /D6 (COMP) IF(OC2* D7) /Y7 = VCC ;Y7= /D7 (COMP) IF(OC2* D8) /Y8 = VCC ;Y8= /D8 (COMP) IF(OC2* D9) /Y9 = VCC ;Y9= /D9 (COMP) FUNCTION TABLE /OC2 /OC1 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Y9 Y8 Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0 ; INPUT DATA OUTPUT DATA ;/OC DDDDDDDDDD YYYYYYYYYY ;2 1 9876543210 9876543210 COMMENTS ---------------------------------------------------------------------- L L LLLLLLLLLL ZZZZZZZZZZ TEST L's (COMP D) L L HHHHHHHHHH LLLLLLLLLL TEST H's (COMP D) L L HLHLHLHLHL LZLZLZLZLZ TEST EVEN CHECKERBOARD (COMP D) L L LHLHLHLHLH ZLZLZLZLZL TEST ODD CHECKERBOARD (COMP D) H L XXXXXHHHHH ZZZZZLLLLL TEST HI-Z FOR /OC2=H L H HHHHHXXXXX LLLLLZZZZZ TEST HI-Z FOR /OC1=H ---------------------------------------------------------------------- DESCRIPTION THE 10-BIT INVERTING OPEN COLLECTOR BUFFER WILL OUTPUT THE COMPLEMENT OF THE INPUT DATA (D). THE OUTPUTS (Y) WILL BE EITHER L OR HI-Z. CERTAIN OUTPUTS WILL BE HIGH-Z (Y=Z) IF EITHER OUTPUT CONTROL LINE IS HIGH (/OC=H) REGARDLESS OF OTHER INPUTS. NOTE THAT OC2 CONTROLS OUTPUTS Y9-Y5 AND OC1 CONTROLS OUTPUTS Y4-Y0. OC2 AND OC1 CONTROL INDEPENDENTLY. OPERATIONS TABLE: /OC2 /OC1 D9-D0 Y9-Y5 Y4-Y0 OPERATION ----------------------------------------------------------- H X X Z X HI-Z FOR UPPER 5 BITS X H X X Z HI-Z FOR LOWER 5 BITS L L D /D /D OUTPUT COMP (L or HI-Z) -----------------------------------------------------------