SP336EEY-0A-EB Datasheet, PDF (17/30 Pages) Exar Corporation – 3.3V / 5V PROGRAMMABLE RS-232/RS-485/RS-422 SERIAL TRANSCEIVER

REV. 1.0.1
SP336E
3.3V / 5V PROGRAMMABLE RS-232/RS-485/RS-422 SERIAL TRANSCEIVER
FIGURE 7. RS-485 DRIVER PROPAGATION DELAY TEST CIRCUIT
A
DI _Tx
VOD
B
3.3V
R_L
C_L
54Ω 50pF
FIGURE 8. RS-485 DRIVER TIMING DIAGRAM
Vcc
DI
0V
B
A
V_DIFF
V_A – V_B
V_O⁺
0V
V_O^–
Vcc/2
V_O ^1/2VO
t_PLH
t_PHL
Vcc/2
1/2V_O
t_DPLH
90%
10%
t_R
t_DPHL
t _SKEW = |t _DPLH - t_DPHL|
90%
10%
t_F
FIGURE 9. RS-485 DRIVER ENABLE AND DISABLE TEST CIRCUIT
A S1
Vcc ^DI Tx
B
C_L = 50pF
GENERATOR
50Ω
OUT
R_L = 500Ω
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