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Old 5th January 2012, 06:57 PM   #1
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Default Identifying smd components

I'm trying to repair the output of a signal generator, but I can't figure out the component names/ID

There's 4 components in question, with the following markings (followed by package format)

L0TB - sot25
A45A - sot25
WV4 - sot23
R1A - sot23

There's a picture of the part of the board containing the 4 components here:

smd.jpg - File Shared from Box - Free Online File Storage

I'm afraid the quality isn't too good, but the markings are as above.

Can anyone identify these for me? I've tried a couple of lists, but I can't seem to find anything that makes sense :-(

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Old 5th January 2012, 07:09 PM   #2
Waly is offline Waly  Umm al-Qaiwan
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Location: In the lab
R1A - MMST3904 (Onsemi) AKA 2N3904
WV4 - BAT54S (double diode, Schottky)
A45A - LM8261 (rail to rail, high output current opamp, National)
L0TB - Not sure, could be LP2985IM5-4.0, a 4V LDO voltage regulator with shutdown (also National).

Last edited by Waly; 5th January 2012 at 07:16 PM.
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Old 5th January 2012, 11:38 PM   #3
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Thankyou very much, you're the man :-)
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