LM79L05ACZ previously known as LM13121Z-5.0 5Volt negative voltage regulator by National Semiconductor. Package: TO-92 marked : 320L79L05 Download National Semiconductor LM79L05 datasheet: Status: NOS (New Old Stock) ex RS. Components. RS Lergacy stock code: RS648-517 Tested components: YES RoHS compliant: TBC