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To: ms.smartest.person who wrote (5)	10/9/2000 11:58:20 AM
From: ms.smartest.person	Read Replies (1) \| Respond to of 3198

(NYSE:DS) Heat-Control Resistors From Dallas Semi OCTOBER 03, 2000 -------------------------------------------------------------------------------- DALLAS -- Dallas Semiconductor (NYSE:DS) today announced the first digital resistors that can automatically measure and compensate for thermal variations affecting laser behavior in optical transceivers. As signal speed continues to increase in next-generation optical communications equipment, the DS1847 and DS1848 Dual Temperature-Controlled NV Variable Resistors aid designer engineers in achieving precision and safety of laser activity. Resistors are used in optical transceivers to control current to VCSELs (vertical cavity surface emitting lasers) or laser diodes. Thermal changes affect current, which affects laser operation. By compensating for the effects of temperature on current, the designer can guarantee that the laser always operates within specifications. Product manager Patrick Fedele said, "The DS1847 and DS1848 are the first ICs that integrate dual, 256-position, linear taper resistors with a digital thermometer and EEPROM. The DS1848 has an extra 128 bytes of general-purpose EEPROM; otherwise the two chips are alike. Both devices completely eliminate the need for external temperature checks or manual compensation in high-speed transceivers. Once installed, they operate very simply, automatically adjusting current with temperature change. If wanted, the temperature readings can be made directly available to the system." dalsemi.com -------------------------------------------------------------------------------- www.lightreading.com