Optoelectronics, Infrared lamps, application notes
Contents |
Product number system: Plastic Emitters
and Photosensors
Product numbers for Fairchild plastic emitters and photosensors
consist of three letters followed by three numbers such as QEC123.
Each digit has meaning and this application note will explain the
method.
Product Number: Q E C 1 2 3
Digit: 1 2 3 4 5 6
Method
Digit One: This is always the letter 'Q' which stands historically for QT Optoelectronics.
Digit Two: This digit can be either the letter 'E' or the
letter 'S' and signifies the function of the product. The 'E' stands
for emitter and the 'S' stands for sensor.
Digit Three: This digit can be a 'B', 'C', 'D', or 'E' and
signifies the package type. The 'B' stands for a subminiature or
surface mount package. 'C' stands for a T-1 package. 'D' stands
for a T-1 ¾ package. 'E' stands for a sidelooker package.
Digit Four: This digit codes the optical configuration (lens
type, viewing angle).
Digit Five: This digit represents the chip type of the
product. For emitters, a '1' indicates a GaAs chip, a '2' indicates
a AlGaAs chip, and a '3' indicates a GaAs chip with an AlGaAs
window. For photosensors, a '1' represents a small active area
phototransistor, a '2' signifies a large active area photosensor, a
'3' is for a photodarlington, a '4' a phototransistor with Rbe and
a '5' an Optologic photodetector.
Digit Six: This digit indicates the selection of the product.
A '1' is for the lowest bin which is the lowest radiant intensity
or sensitivity. A '2' is the middle bin and a '3' is the highest
bin.
Notes
1. The nomenclature for the product packages are characterized by the code 'T-#'. The number following the 'T' is the diameter of the lens in multiples of 1/8 inches.
2. The IR components above are sometimes referred to as 'discretes'.
3. To determine which emitters and photosensors make up the matched pair, please refer to the matched pair section of the short form catalog.
4. There are other plastic emitters and photosensors offered by Fairchild which do not follow this system. These products are legacy products from acquired companies such as Harris Semiconductor or are industry standards.
5. Some products use the 3 letters prefix (for instance QED) in conjunction with 3 or 4 digits that are identical to those used by competitors. Example: QSD2030 is a second source for Osram SFH2030.
6. Photosensors come usually in black color epoxy acting as a daylight filter. If the daylight filter is not required a suffix 'C' has to be added to the partnumber. Example: QSC113C.
Emitters
| Product number | Past code | Current code |
| F5F1 |
Gray | Black |
| F5G1 | Green | Green |
| QEE113 | Gray | Gray |
| QEE122 | Green | Orange |
| QEE123 | Green | Orange |
Photosensors
| Product number | Past code | Current code |
| L14Q1 |
Red | Red |
| L14R1 | Yellow | Yellow |
| QSE113 | Blue | Blue |
| QSE114 | Blue | Blue |
| QSE122 | Red | Red |
| QSE133 | Yellow | Yellow |
Photosensors
| Product number | Past code (Emitter/Sensor) | Current code (Emitter/Sensor) |
| H23A1 | Gray/Red | Black/Red |
| H23A2 | Gray/Red | Black/Red |
| H23B1 | Gray/Yellow | Black/Yellow |
| H23LOB | Gray/Green | Black/Green |
| H23LOI | Gray/Blue | Black/Blue |
| H23LTB | Gray/Red | Black/Red |
| H23LTI | Gray/Yellow | Black/Yellow |
| QPE1256 | Green/Red | Orange/Red |
| QPE1257 | Green/Yellow | Orange/Yellow |
| QPE1258 | Green/Green | Orange/Green |
| QPE1259 | Green/Blue | Orange/Blue |


