Broadcom HSDL Surface Reflective Optical Sensor, Photodiode Output, Surface Mount package

The HSDL-9100 series from Avago Technologies are a family of proximity sensors in a surface-mounted (SMD) package. It combines an analogue-output reflective sensor with an IR emitter and photodiode. They are all housed within a compact metal package which offers excellent optical isolation, reducing cross-talk.
Suitable applications for the HSDL-9100 include; mobile phones, notebooks, industrial control, printers, home appliances and vending machines.

Features of the HSDL-9100:
Compact metal package
Detects objects from near-zero to 60mm range
High signal to noise ratio
Low optical crosstalk
Low dark current
Miniature 4-pin SMT package