7450 TRIPLE 3-INPUT NAND REMOVE JUMPERS: AA1 AC1 AA2 AC2 AH2 AT2 CONNECT: AA1 tester to AA2 UUT AC1 tester to AC2 UUT AH2 UUT to GROUND AT2 UUT to +5V DOES NOT TEST EXPANDER INPUTS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! PINS 1 I AA1 E1-1 7450 pin 1 1A 2 I AS2 E1-15 7450 pin 13 1B 3 I AM2 E1-11 7450 pin 9 1C 4 I AN2 E1-12 7450 pin 10 1D 5 O AL2 E1-10 7450 pin 8 1Y = (1A AND 1B) NOR (1C AND 1D) NOR (X,X-N EXPANDER) 6 I AB2 E1-2 7450 pin 2 2A 7 I AC1 E1-3 7450 pin 3 2B 8 I AD2 E1-4 7450 pin 4 2C 9 I AE2 E1-5 7450 pin 5 2D 10 O AF2 E1-6 7450 pin 6 2Y = (2A AND 2B) NOR (2C AND 2D) 11 O AP2 E1-13 7450 pin 11 X (EXPANDER) 12 O AR2 E1-14 7450 pin 12 X-N (EXPANDER) 13 I AH2 E1-7 7450 pin 7 GROUND 14 I AJ2 E1-8 (UNUSED PIN OF 16-PIN SOCKET) 15 I AK2 E1-9 (UNUSED PIN OF 16-PIN SOCKET) 16 I AT2 E1-16 7450 pin 14 VCC IIIIOIIIIOOOIIII ; START WITH ALL INPUTS ZERO 0000100001XX0000 ; ALL INPUTS HI 1111011110 ; WITH ALL OTHER INPUTS HI, GRAY CODE EACH GATE 01 0 00 0 10 0 11 0 010 000 100 110 01 0 00 0 10 0 11 0 010 000 100 110 ; ALL INPUTS LO 0000100001 ; WITH ALL OTHER INPUTS LO, GRAY CODE EACH GATE 01 1 11 0 10 1 00 1 011 110 101 001 01 1 11 0 10 1 00 1 011 110 101 001 ;**************************** ; SHOULD TEST ALL 256 PATTERNS ;**************************** END