  vol ts ▁depending ▁on ▁the ▁model , ▁and ▁typically ▁provide ▁ 1 ▁or ▁ 1 . 5 ▁am per es ▁of ▁current ▁( though ▁smaller ▁or ▁larger ▁packages ▁may ▁have ▁a ▁lower ▁or ▁higher ▁current ▁rating ). ▁ ▁Family ▁members ▁▁ 7 8 xx ▁There ▁are ▁common ▁configurations ▁for ▁ 7 8 xx ▁IC s , ▁including ▁ 7 8 0 5 ▁( 5   V ), ▁ 7 8 0 6 ▁( 6   V ), ▁ 7 8 0 8 ▁( 8   V ), ▁ 7 8 0 9 ▁( 9   V ), ▁ 7 8 1 0 ▁( 1 0   V ), ▁ 7 8 1 2 ▁( 1 2   V ), ▁ 7 8 1 5 ▁( 1 5   V ), ▁ 7 8 1 8 ▁( 1 8   V ), ▁and ▁ 7 8 2 4 ▁( 2 4   V ) ▁versions . ▁The ▁ 7 8 0 5 ▁is ▁the ▁most ▁common , ▁as ▁its ▁reg ulated ▁ 5 - vol t ▁supply ▁provides ▁a ▁convenient ▁power ▁source ▁for ▁most ▁T TL ▁components . ▁▁▁ ▁Less ▁common ▁are ▁lower - power ▁versions ▁such ▁as ▁the ▁L M 7 8 M xx ▁series ▁( 5 0 0   m A ) ▁and ▁L M 7 8 L xx ▁series ▁( 1 0 0   m A ) ▁from ▁National ▁Sem icon duct or . ▁Some ▁devices ▁provide ▁slightly ▁different ▁volt ages ▁than ▁usual , ▁such ▁as ▁the ▁L M 7