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                      THE SMD

SMD Codes.

SMD devices are, by their very nature, too small to carry conventional semiconductor type numbers.
Instead, a somewhat arbitrary coding system has grown up, where
the device package carries a simple two- or three-character ID code.

Identifying the manufacturers' type number of an SMD device from
the package code can be a difficult task, involving combing through
many different databooks.

This HTML book is designed to provide an easy means of device
identification. It lists well over 3,400 device codes in alphabetical
order, together with type numbers, device characteristics or
equivalents and pinout information.

                                       How to use the SMD Codebook

To identify a particular SMD device, first identify the package style and note the ID code printed on the device.
Now look up the code in the alphanumeric listing which forms the main part of this book by clicking on the first
character shown in the left-menu.

Unfortunately, each device code is not necessarily unique. For example a device coded 1A might be either a
BC846A or a FMMT3904. Even the same manufacturer may use the same code for different devices!
If there is more than one entry, use the package style to differentiate between devices with the same ID code.

This compilation has been collected from R P Blackwell G4PMK, manufacturers' data and other sources of SMD
device ID codes, pinout and leaded device equivalent information.

The entries under the Manufacturer column are not intended to be comprehensive; rather they are intended to
provide help on locating sources of more detailed information if you require it.

                                                ID Code Variations

Many manufacturers use an extra letter as their own identification code. If the device is from Philips it will
sometimes have a lower case 'p' (or sometimes 't') added to the code; Siemens devices usually have a lower
case 's'.

For example, if the code is 1A, according to the table there are a number of possibilities:


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