This part is a kind of semiconductor called SP8M3.

Function of this product has 4V Drive Nch + Pch MOS FET.

Manufacturers : Rohm

Image and pinout :

Some of the text within the PDF file :

( DataSheet : ) SP8M3 Transistors 4V Drive Nch+Pch MOS FET SP8M3 zStructure Silicon N-channel / P-channel MOS FET zExternal dimensions (Unit : mm) SOP8 5.0 0.4 1.75 (5) zFeatures 1) Low on-resistance. 2) Built-in G-S Protection Diode. 3) Small Surface Mount Package (SOP8). 1pin mark (8) (1) (4) 3.9 6.0 1.27 0.2 zApplication Power switching, DC / DC converter. Each lead has same dimensions zPackaging specifications Package Type SP8M3 Code Basic ordering unit (pieces) Taping TB 2500 zEquivalent circuit (8) (7) (6) (5) (8) (7) (6) (5) ∗2 ∗2 (1) (2) (3) (4) (1) Tr1 (Nch) Source (2) Tr1 (Nch) Gate (3) Tr2 (Pch) Source (4) Tr2 (Pch) Gate (5) Tr2 (Pch) Drain (6) Tr2 (Pch) Drain (7) Tr1 (Nch) Drain (8) Tr1 (Nch) Drain ∗1 ∗1 (1) (2) (3) (4) ∗1 E [ ... ]

SP8M3 PDF Datasheet Download