| Manufacturer | Part # | Datasheet | Description |
 National Semiconductor ... | PAL20L4-4VC |  1Mb/18P | Programmable Array Logic 24-Pin Medium PAL Series -7,-5,and -4 |
 National Semiconductor ... | PAL20L4-4VM |  1Mb/18P | Programmable Array Logic 24-Pin Medium PAL Series -7,-5,and -4 |
| PAL20L4-4JC |  1Mb/18P | Programmable Array Logic 24-Pin Medium PAL Series -7,-5,and -4 |
| PAL20L4-4JM |  1Mb/18P | Programmable Array Logic 24-Pin Medium PAL Series -7,-5,and -4 |
| PAL20L4-4NC |  1Mb/18P | Programmable Array Logic 24-Pin Medium PAL Series -7,-5,and -4 |
| PAL20L4-4NM |  1Mb/18P | Programmable Array Logic 24-Pin Medium PAL Series -7,-5,and -4 |
| PAL20L4-5JC |  1Mb/18P | Programmable Array Logic 24-Pin Medium PAL Series -7,-5,and -4 |
| PAL20L4-5JM |  1Mb/18P | Programmable Array Logic 24-Pin Medium PAL Series -7,-5,and -4 |
| PAL20L4-5NC |  1Mb/18P | Programmable Array Logic 24-Pin Medium PAL Series -7,-5,and -4 |
| PAL20L4-5NM |  1Mb/18P | Programmable Array Logic 24-Pin Medium PAL Series -7,-5,and -4 |
| PAL20L4-5VC |  1Mb/18P | Programmable Array Logic 24-Pin Medium PAL Series -7,-5,and -4 |
| PAL20L4-5VM |  1Mb/18P | Programmable Array Logic 24-Pin Medium PAL Series -7,-5,and -4 |
| PAL20L4-7JC |  1Mb/18P | Programmable Array Logic 24-Pin Medium PAL Series -7,-5,and -4 |
| PAL20L4-7JM |  1Mb/18P | Programmable Array Logic 24-Pin Medium PAL Series -7,-5,and -4 |
| PAL20L4-7NC |  1Mb/18P | Programmable Array Logic 24-Pin Medium PAL Series -7,-5,and -4 |
| PAL20L4-7NM |  1Mb/18P | Programmable Array Logic 24-Pin Medium PAL Series -7,-5,and -4 |
| PAL20L4-7VC |  1Mb/18P | Programmable Array Logic 24-Pin Medium PAL Series -7,-5,and -4 |
| PAL20L4-7VM |  1Mb/18P | Programmable Array Logic 24-Pin Medium PAL Series -7,-5,and -4 |
| PAL20L4A |  448Kb/14P | Progammable Array Logic Series 24 (PAL Series 24) |
| PAL20L4AC |  448Kb/14P | Progammable Array Logic Series 24 (PAL Series 24) |