UT54LVDS031 データシートの表示（PDF） - Aeroflex UTMC

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UT54LVDS031

Quad driver. Lead finish gold. Prototype flow.

Aeroflex UTMC 

DIN

DOUT-

SINGLE-ENDED

V0D

DOUT+

3V

0V

VOH

VOS

VOL

0V (DIFF.)

DOUT+ - DOUT-

DIFFERENTIAL OUTPUT

+VOD

0V

VSS

-VOD

Note: The footprint of the UT54LVDS031 is the same as the in-

dustry standard Quad Differential (RS-422) Driver.

The current mode driver provides substantial benefits over

voltage mode drivers, such as an RS-422 driver. Its quiescent

current remains relatively flat versus switching frequency.

Whereas the RS-422 voltage mode driver increases

exponentially in most cases between 20 MHz - 50 MHz. This is

due to the overlap current that flows between the rails of the

device when the internal gates switch. Whereas the current mode

driver switches a fixed current between its output without any

substantial overlap current. This is similar to some ECL and

PECL devices, but without the heavy static ICC requirements of

the ECL/PECL design. LVDS requires 80% less current than

similar PECL devices. AC specifications for the driver are a

tenfold improvement over other existing RS-422 drivers.

The Three-State function allows the driver outputs to be

disabled, thus obtaining an even lower power state when the

transmission of data is not required.

Figure 4. Driver Output Levels

3

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