M304 PCB REV B, SCHEMATIC REV B   QUAD ONE SHOT DELAY.

USE SINGLE STEP AND OSCILLOSCOPE TO SEE PULSES.

PIN AB1 TO +5V -> 100 NS OUTPUT A PULSE (OPEN -> 1 US) (AF1 OUT-A, AH1 OUT-A-N)
PIN AK2 TO +5V -> 100 NS OUTPUT B PULSE (OPEN -> 1 US) (AJ1 OUT-B, AK1 OUT-B-N)
PIN AL2 TO +5V -> 100 NS OUTPUT C PULSE (OPEN -> 1 US) (AL1 OUT-C, AM1 OUT-C-N)
PIN AV1 TO +5V -> 100 NS OUTPUT D PULSE (OPEN -> 1 US) (AP1 OUT-D, AN1 OUT-D-N)

PINS
 1 I AD1 E2-13  INPUT A1 (LOW TRIGGERS)
 2 I AD2 E2-12  INPUT A2 (LOW TRIGGERS)
 3 O AF1 E1-08  OUTPUT A
 4 O AH1 E1-06  OUTPUT A-N
 5 I AE1 E2-10  INPUT B1 (LOW TRIGGERS)
 6 I AE2 E2-09  INPUT B2 (LOW TRIGGERS)
 7 O AJ1 E3-08  OUTPUT B
 8 O AK1 E3-06  OUTPUT B-N
 9 I AS1 E7-01  INPUT C1 (LOW TRIGGERS)
10 I AS2 E7-02  INPUT C2 (LOW TRIGGERS)
11 O AL1 E5-08  OUTPUT C
12 O AM1 E5-06  OUTPUT C-N
13 I AR1 E7-04  INPUT D1 (LOW TRIGGERS)
14 I AR2 E7-05  INPUT D2 (LOW TRIGGERS)
15 O AP1 E6-06  OUTPUT D
16 O AN1 E6-08  OUTPUT D-N

IIOOIIOOIIOOIIOO
1101110111011101
; PULSE OUTPUT A (PULSE IS TOO QUICK TO SEE)
0101
1101
; PULSE OUTPUT A (PULSE IS TOO QUICK TO SEE)
1001
1101
; PULSE OUTPUT B (PULSE IS TOO QUICK TO SEE)
    0101
    1101
; PULSE OUTPUT B (PULSE IS TOO QUICK TO SEE)
    1001
    1101
; PULSE OUTPUT C (PULSE IS TOO QUICK TO SEE)
        0101
        1101
; PULSE OUTPUT C (PULSE IS TOO QUICK TO SEE)
        1001
        1101
; PULSE OUTPUT D (PULSE IS TOO QUICK TO SEE)
            0101
            1101
; PULSE OUTPUT D (PULSE IS TOO QUICK TO SEE)
            1001
            1101
1101110111011101
END