SP3495E Datasheet, PDF (9/17 Pages) Exar Corporation – HIGH SPEED +3.3V RS-485/RS-422 TRANSCEIVERS WITH +/-15KV ESD PROTECTION AND ADVANCED FAILSAFE

SP3495E-3497E
REV. 1.0.0
HIGH SPEED +3.3V RS-485/RS-422 TRANSCEIVERS WITH +/-15KV ESD PROTECTION AND ADVANCED FAILSAFE
FIGURE 6. DRIVER PROPAGATION DELAY TEST CIRCUIT
Y
DI _D
VOD
Z
3.3V
R_L
C_L
54Ω 50pF
FIGURE 7. DRIVER PROPAGATION DELAY TIMING DIAGRAM
Vcc
DI
0V
Z
Y
V_DIFF
V_Y – V_Z
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 8. DRIVER ENABLE AND DISABLE TIME TEST CIRCUIT 1
0 or Vcc ^DI
Y
D
Z
S1
C_L = 50pF
GENERATOR
50Ω
OUT
R_L = 500Ω
9