Vishay Intertechnology's high-speed IR emitters extend transmission range

Fiber Optics Weekly Update, Sept 17, 2004

Using double-hetero-chip GaAlAs/GaAlAs technology, the TSFF5410, TSFF5210, TSMF4710, and TSMF3710 1.5-V IR emitters have a radiant intensity of up to 43 percent greater than previous-generation devices. Addressing free-air data transmission applications with high modulation frequencies or high data transmission rate requirements, the 870nm emitters extend the range and reliability of infrared data transmission and light barrier systems in automotive, consumer, and industrial environments.

The TSFF5410 combines a [ or -]22[degrees] angle of half intensity with typical radiant intensity of 70mW/sr, while the TSFF5210 combines a [ or -]10[degrees] angle of half intensity with radiant intensity of 180mW/sr. The T-13/4-packaged devices feature a bandwidth of 23MHz and typical rise and fall times of 15ns.

For applications where a space-saving surface-mount device is required, the SMT PLCC-2-packaged TSMF4710 (23MHz modulation bandwidth) and TSMF3710 (12MHz modulation bandwidth) offer a 60[degrees] angle of half intensity and typical radiant intensity of 10mW/sr, with typical rise and fall times of 15 and 30ns, respectively. (From $18.80 per 100 in 50,000 qty--stock to 12 weeks ARO.)

For more information, please go to www.vishay.com