RS-485 Ver la hoja de datos (PDF) - Exar Corporation
Número de pieza
componentes Descripción
Fabricante
RS-485 Datasheet PDF : 23 Pages
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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
B
Rx
A
Rx Disable = 0V
B
A
tRPLH
VOUT
1.5V
VOUT
CL
+1V
0V
-1V
tRPHL
VOH
1.5V
VOL
FIGURE 12. RS-485/422 DRIVER PROPAGATION DELAY AND RISE/FALL TIMES
B
Tx Input
Tx
VOD
RL
CL
Tx Enable = VCC
A
Tx Input 3V
0V
B
VOD
(VA - VB)
A
VOD+
0V
VOD-
1.5V
tDPLH
1.5V
VOD
tSKEW = |tPHL ڏtPLH|
tDPHL
90%
10%
tDR
90%
10%
tDF
17
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