14-SOIC hex inverter for 5V bus logic
The SN74ALS04BNSR is a hex inverter from the 74ALS family, packing six independent inverter gates in a 14-SOIC (0.209", 5.30mm width) surface-mount package. Each gate accepts a single input and delivers the inverted logic level at the output.
Maximum propagation delay is 11ns at 5V with a 50pF load — this sets the ceiling for how fast data can ripple through the inverter chain. For a 5V bus running at 20 MHz (50 ns period), the 11ns delay consumes about 22% of the cycle, leaving margin for setup and hold at the receiving gate. Output drive is specified as 400 µA source and 8 mA sink at the logic high and low levels respectively. The asymmetric drive means the inverter can sink a standard TTL load but sources only lightly — fan-out to CMOS inputs is fine; driving a 50-ohm backplane trace is not in scope. Input logic thresholds are 0.8V for low and 2V for high, which is TTL-compatible. A 5V CMOS output driving this inverter sees a 3V noise margin on the high side and 0.8V on the low side — adequate for same-board signalling but watch for ground bounce on long traces.
Supply and temperature envelope
Quiescent current is 1.1 mA max across all six gates — at 5V that is 5.5 mW of static dissipation, negligible in most designs but worth noting for battery-backed or low-standby applications. This limits deployment to indoor, temperature-controlled environments — not suitable for automotive or industrial enclosures without climate management.
It is ROHS3 compliant, meeting the latest EU restriction of hazardous substances directive. No other compliance documentation (UL, IEC, REACH) is listed in the record.