On 5 February 2011 03:30, alan smith wrote: > I'm trying to find a datasheet and identify this part, google hasn't help= ed me too much. =A0Its marked as "5252F" and is a thru hole, 4 pin device S= IP type packaging. =A0The board has it marked as IC1, but I'm not sure if i= ts a IC or FET Knowing a bit more (or even anything whatsoever) about tye circuit that it was in would help, but, this seems like a likely candidate http://www.rohm.com/products/databook/general/pdf/bd52xxfve_series-e.pdf These are voltage detector IC's. This is a 5 pin smd version but one pin is connected to substrate and is unused. A ..5252 would be 5.200 Volt. MAY also have "PN" on the pkg. A check whether the device would functionally fit your circuit would help confirmordenythatitistheonenosirewehavenonukesaboardbutwearenotallowed= totellyou. looking for BD52 on Digikey shows 6-LSOP AND 5-VSOF packages. . Russell McMahon --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .