These devices contain four independent 2-input NOR buffer gates with open-collector
outputs. Open-collector outputs require resistive pull-up to perform logically
but can deliver higher VOH levels and are commonly used in wired-AND
The SN5433 and SN54LS33 are characterized for operation over the full military
temperature range of -55°C to 125°C. The SN7433, and SN74LS33 are
characterized for operation from 0°C to 70°C.
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