Rohm Semiconductor ROHM Semiconductor High Output Infrared LEDs

ROHM Semiconductor SIM-030ST and SIM040ST High Output Infrared LEDs are ideally suited for proximity sensor applications. These ROHM surface-mount IR LEDs feature breakthrough IR wavelength technology providing peak output of 870nm, compared to 950nm for comparable devices. The 870nm level is much closer to the peak wave sensitivity of phototransistors (sensors), thus achieving higher efficiency proximity sensing and energy savings of up to 66%. The small package footprint and low-profile further enhance their application in cell phones and other portable devices. The ROHM Semiconductor SIM-030ST, the smaller of the two IR LED devices, has a 2.3mm x 1.95mm footprint and a height of just 0.9mm. With a forward current (IF) of 100mA, the device delivers a typical emission strength of 30mW/sr (milliwatts per steradian). The slightly larger SIM-040ST (3.1mm x 2.25mm x 1.6mm) provides 40mW/sr, typical emission strength.