SP339EER1-0A Datasheet, PDF (19/23 Pages) Exar Corporation – RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION

SP339E
REV. 1.0.4
RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION
FIGURE 14. RS-485/422 DRIVER OUTPUT ENABLE/DISABLE TIMES
Testing B: Tx Input = 0V
Tx
Testing A: Tx Input = V_CC
Tx Enable
B
R_L
A
V_OUT
C_L
3V
Tx Enable
0V
V_OUT
V_OH
V_OL
1.5V
t_DZH
V_OH + V_OL
2
Testing B: Tx Input = V_CC
Tx
Testing A: Tx Input = 0V
Tx Enable
1.5V
t_DHZ
V_OH - 0.25V
V_CC
B
R_L
V_OUT
C_L
A
3V
Tx Enable
0V
V_OUT
V_OH
V_OL
1.5V
t_DZH
V_OH + V_OL
2
1.5V
t_DHZ
V_OL + 0.25V
19