ScansUX9960.pdf
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FAIRCHILD HIGH SPEED TTL/SSI . 9H40/54H40, 74H40
DUAL 4-INPUT NAND BUFFER
logic and connection diagram
dip (TOP VIEW)
|vcc nc
f nc r1^ 1 GMD
LJLUUJLULllLlIU
Positive logic: V = ABCD
flatpak (TOP VIEW
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