Unknown Optocoupler

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I have about 100 of these I picked up from a grab bag. I cannot find the datasheet for the life of me. As close as I've come is the MOC8205 as someone on ebay selling them, the SOC, gave a datasheet for the MOC8205.

Reply to
Kodfk Dleepd
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"Kodfk Dleepd"

** Motorola would typically drop the "M" from a regular part number and replace it with an "S" whenever the part was a special type made for or selected from a batch to meet a customer's specs.

The following sequence of digits were a code used by the customer and Motorola to identify the special part's specs.

For example: " SJE1234" or " SJ123 ".

Your " SOC873 " made in July of 1994 (that is what 9430 means ) fits the pattern exactly.

Motorola have never been known to reveal the actual device number or the special specs.

.... Phil

Reply to
Phil Allison

[surface mount six-pin package, Motorola 1994 datecode and part number SOC 873]

So, what's the problem? It's an optocoupler (that's the 'OC' part of the part number), probably pin 1 and 2 are an IR photoemitter. Either phototransistor or photodarlington output is likely, a little work (feed 5 mA to the input, look at current output) will tell you what the current transfer ratio is.

Motorola's "S" numbers are customer-specials, so there might be frequency or sensitivity or safety 'special' specifications that the factory tested for, but the generic parts of this style are/were mass-produced. Somewhere, a line producing (for instance) 4N35 just got a short change of outgoing-test program and the results got the SOC 873 label.

So, you just have to test it, to find out what specs it fits.

Since you have several, a tear-down (either hot sulfuric acid or kiln-bake will remove the plastic parts) and microscope inspection might find more info.

Reply to
whit3rd

A dental X-ray works fine,

The unit has a higher voltage rating than normal. Its specs should be easy to find.

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Many thanks,

Don Lancaster                          voice phone: (928)428-4073
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Reply to
Don Lancaster

SOC873.

Hope This Helps! Rich

Reply to
Rich Grise

A stunt I discovered in the early '70's... run a phenolic-based package thru a hybrid firing furnace. It comes out the other end looking intact except it's now white... because it's ash. Carefully brush the ash away and you have a perfect die to take pictures of ;-)

...Jim Thompson

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|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
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Reply to
Jim Thompson

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