SP339EER1-0A Datasheet, PDF(17/23 Page) Exar Corporation – RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION

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SP339EER1-0A Datasheet, PDF (17/23 Pages) Exar Corporation – RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION

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SP339E

REV. 1.0.4

RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION

FIGURE 11. RS-485/422 RECEIVER PROPAGATION DELAY

Rx Disable = 0V

tRPLH

VOUT

1.5V

VOUT

+1V

-1V

tRPHL

VOH

1.5V

VOL

FIGURE 12. RS-485/422 DRIVER PROPAGATION DELAY AND RISE/FALL TIMES

Tx Input

VOD

Tx Enable = VCC

Tx Input 3V

VOD

(VA - VB)

VOD+

VOD-

1.5V

tDPLH

1.5V

VOD

tSKEW = |tPHL ÚtPLH|

tDPHL

90%

10%

tDR

90%

10%

tDF

▷