8 L 6 2 ▁( 6 . 2   vol ts ) ▁and ▁L M 7 8 L 8 2 ▁( 8 . 2   vol ts ) ▁as ▁well ▁as ▁the ▁ST M icro elect ron ics ▁L 7 8 L 3 3 AC Z ▁( 3 . 3   vol ts ). ▁ ▁The ▁ 7 8 0 5 ▁has ▁been ▁used ▁in ▁some ▁AT X ▁power ▁supply ▁designs ▁for ▁the ▁+ 5   V SB ▁(+ 5   V ▁stand by ) ▁output . ▁▁ 7 9 xx ▁The ▁ 7 9 xx ▁devices ▁have ▁a ▁similar ▁" part ▁number " ▁to ▁" vol t age ▁output " ▁scheme , ▁but ▁their ▁outputs ▁are ▁negative ▁voltage , ▁for ▁example ▁ 7 9 0 5 ▁is ▁− 5   V ▁and ▁ 7 9 1 2 ▁is ▁− 1 2   V . ▁▁▁ ▁The ▁ 7 9 0 5 ▁and / or ▁ 7 9 1 2 ▁were ▁popular ▁in ▁many ▁older ▁AT X ▁power ▁supply ▁designs , ▁and ▁some ▁newer ▁AT X ▁power ▁supplies ▁may ▁have ▁a ▁ 7 9 1 2 . ▁ ▁Un related ▁devices ▁The ▁L M 7 8 S 4 0 ▁from ▁Fair child ▁is ▁not ▁part ▁of ▁the ▁ 7 8 xx ▁family ▁and ▁does ▁not ▁use ▁the ▁same ▁design . ▁It ▁is ▁a ▁component ▁in ▁switching ▁reg ulator ▁designs ▁and ▁is ▁not ▁a ▁linear ▁reg ulator ▁like ▁other ▁ 7 8 xx ▁devices . ▁The ▁ 7 8 0 3 SR ▁from ▁Dat