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National launches extended temperature LVDS transmitter/receiver family

National Semiconductor Corporation has added a five-member family of extended temperature devices to its portfolio of low-voltage differential signaling (LVDS) products. The general-purpose LVDS physical layer devices (PHYs) are optimized for driving signals through cable harnesses in automotive applications and other harsh, high-temperature environments.

The DS90LV011AH transmitter, DS90LT012AH receiver, DS90LV027AH dual transmitter, DS90LV028AH dual receiver and DS90LV049H integrated dual transceiver are guaranteed to operate in environments from -40 to +125° C.

Jeff Waters, product line director for National’s interface division, says the extended temperature LVDS PHYs enable ten times the level of performance of lower-speed communication standards like RS-485 and CAN, with data rates up to 400 Mb/s over cables in hot and electromagnetically noisy environments.

The LVDS PHYs improve signal integrity by translating single-ended control and data signals from sensors into LVDS signals for transmitting to a digital processor, typically an FPGA or ASIC. All five devices use the LVDS analog interface to provide a high-performance signal path that transfers digital information. The DS90LT012AH also features an integrated LVDS input termination to save board space, while the DS90LV027AH and DS90LV028AH feature a flow-through pin-out to simplify board layout.

The DS90LV011AH and DS90LT012AH are packaged in a five-pin SOT-23. The DS90LT012AH is also available as a bare die. The DS90LV027AH and DS90LV028AH are packaged in an eight-pin SOIC and the DS90LV049H is packaged in a 16-pin TSSOP. Lead-free package options are also available.

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