30 ns PAL with 10 macrocells — legacy glue-logic workhorse
The PAL20X4ACNS is a 30 ns PAL-type programmable logic device with 10 macrocells, housed in a 24-pin DIP (0.300", 7.62 mm) through-hole package. It operates from a 4.75 V to 5.25 V supply.
RoHS non-compliant — legacy solder process
The PAL20X4ACNS is marked RoHS non-compliant, meaning it uses lead-bearing solder finishes (typically tin-lead). This is expected for a through-hole DIP part from this era. If your assembly line is RoHS-only (lead-free solder), you will need a waiver or a separate leaded process for this component. For repair and maintenance of legacy boards, the tin-lead finish is often preferred for compatibility with existing solder joints.
