XR34350 Datasheet, PDF(17/20 Page) Exar Corporation – Internal Termination and Wide Output Swing

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XR34350 Datasheet, PDF (17/20 Pages) Exar Corporation – Internal Termination and Wide Output Swing

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Test Circuits (Continued)

Testing B: Tx Input = 0V

Testing A: Tx Input = VCC

Tx Enable

XR34350

VOUT

Tx Enable

VOH

VOUT

VOL

1.5V

tDZH

VOH + VOL

1.5V

tDHZ

VOH - 0.25V

Testing B: Tx Input = VCC

Testing A: Tx Input = 0V

Tx Enable

VOH

VOUT

VOL

1.5V

tDZH

VOH + VOL

VCC

VOUT

1.5V

tDHZ

VOL + 0.25V

Figure 15. RS-485/RS-422 Driver Output Enable/Disable Times

REV1B

17/20

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