What the CD74HC147PW is and where it fits
The CD74HC147PW is a 74HC-series priority encoder from Texas Instruments — a 10-line-to-4-line encoder that outputs the binary code of the highest-priority active input. It's a single-supply logic part running on 2V to 6V, in a 16-TSSOP surface-mount package. The full military temperature range (-55°C to 125°C) means it can live in an engine bay, a satellite power supply, or an outdoor telecom cabinet without derating headaches.
Key ratings and what they mean for your BOM
The 1 x 10:4 circuit encodes nine active-low inputs into a four-bit active-low output. Output high/low current is 5.2 mA each side.
Lifecycle and compliance
The CD74HC147PW is listed as Active and ROHS3 compliant. For production BOMs that need a lead-free, RoHS-compliant part, this checks the box. No official second-source or successor listed — if you need a dual-source hedge, the 74HC family is broadly second-sourced across TI, Nexperia, and others, but no pin-compatible alternate is named in the record.