Texas Instruments Expands LVDS Technology with New Quadruple Differential Driver and Receiver
(Sept. 22, 1997) -- A new quadruple differential line driver and receiver from Texas Instruments offers lower power and higher data rates for point-to-point baseband data transmission over controlled impedance media of 100 ohms. The transmission media may be printed circuit board traces, backplanes or cables. This driver and receiver are ideal in applications such as telecommunications and computing.
These devices, designated the SN65LVDS31 for the driver and SN65LVDS32 for the receiver, implement the electrical characteristics of Low Voltage Differential Signaling (LVDS). This signaling technique lowers the output voltage levels of 5V differential standard levels to reduce the power, increase the switching speeds and allow operation with a 3.3V supply rail. Any of the four current-mode drivers will deliver a minimum differential output voltage magnitude of 247mV into a 100 ohm load when enabled by either an active-low or active-high enable input. Any of the four differential receivers will provide a valid logical output state with a +/-100mV differential input voltage within the input common-mode voltage range. The input common-mode voltage range allows 1V of ground potential difference between two LVDS nodes.
Features/Benefits
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Allows for single power supply and low power consumption. |
- Typical rise/fall times of 750ps (400 Mbps)
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Allows data signaling rates as high as 400 Mbps. Designers will no longer be limted to slower rates to pass electromagnetic emissions requirements. |
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Gives a known receiver output with no cable connected. This elimiates the need for external components to prevent noise from being received as valid data with no input. |
- Bus-pin electrostatic discharge (ESD) protection exceeds 8 kV
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Increases reliability in cabled environments. |
- Operating temperature range (-40C to 85C)
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Widens design margin in harsh environments. |
- Footprint compatible with the current market solution
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Eases upgrade to existing designs. |
End Equipment Applications
Applications for the SN65LVDS31 and SN65LVDS32 include:
- Telecommunications
- Computing
Availability, Packaging and Pricing
The SN65LVDS31 driver and SN65LVDS32 receiver are now available from TI and its authorized distributors. These devices are in a 16-pin small-outline integrated circuit (SOIC) and suggested pricing is $3.85 in quantities of 1,000.
More information regarding TI’s MSP products are available on the World Wide Web at  http://www.ti.com/sc/msp.
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