Pinout for 74HTC74 ( Quad bistable transparent latch )
74HCT75 # 1D-4D: Data Inputs +---\/---+ # 1Q-4Q: Latch Contents 1 -|!1Q 1Q|- 16 # !1Q-!4Q: Inverse of Latch Contents 2 -|1D 2Q|- 15 # E12: Clock Pulse for Q1 and Q2 3 -|2D !2Q|- 14 # E34: Clock Pulse for Q3 and Q4 4 -|E34 E12|- 13 # Gnd: Ground 5 -|Vcc Gnd|- 12 # Vcc: Power In 6 -|3D !3Q|- 11 # 7 -|4D 3Q|- 10 # To use, set the 2 data bits you wish to update 8 -|!4Q 4Q|- 9 # then strobe the appropriate enable line. +--------+ # NOTE: YOU MUST UPDATE 2 BITS AT A TIME!
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