Vintage Signetics Flat Pack Circuit – Quad 2 input NAND gate
Signetics S8H80 DCL Micro Circuit 14 Pin Flat pack QUAD 2-INPUT NAND GATE
NSN 5962-00-551-9428 Mil Spec 883B
Still in factory proective plastic frames
These gate elements are all designed for ultra-high switching speed while maintaining high fan-out and noise margin.
All of the SHOO gates perform the NAND function for positive logic (highest voltage level = “1”)
and the NOR function for negative logic (lowest voltage level = “1”). The output structure utilizes a totem-pole arrangement which employs a Darlington Pair for active pull-up.
This configuration provides extremely low output impedance for the “1” output state.
As a result, switching times are relatively insensitive to capacitive loads when compared to single transistor active pull-ups. The saturating output switching transistor provides a low impedance driving source in the output “0” state, enhancing turn-on times and providing high fan-out capability.
Can be used to make small low frequency oscillators / flashers etc.
Price is per each
I have over 100 of these available