MAX1481 Datasheet, PDF (11/16 Pages) Maxim Integrated Products – Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited, 12Mbps, RS-485/RS-422 Transceivers in uMAX Package

Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited,
12Mbps, RS-485/RS-422 Transceivers in µMAX Package
Y
V_OD
Z
R
R
V_OC
Figure 5. Driver DC Test Load
3V
DE
DI
Y
V_ID
Z
C_L1
R_DIFF
C_L2
RECEIVER ^{TEST POINT}
OUTPUT
C_L
1k
1k
V_CC
S1
S2
Figure 6. Receiver Enable/Disable Timing Test Load
OUTPUT
UNDER TEST
500Ω
C_L
V_CC
S1
S2
Figure 7. Driver Timing Test Circuit
Figure 8. Driver Enable/Disable Timing Test Load
3V
DI
1.5V
0V
Z
Y
V_DIFF
V_O
0V
-V_O
V_O
1/2 V_O
10%
t_R
t_DPLH
t_DPHL
1.5V
1/2 V_O
V_DIFF = V_Y - V_Z
90%
90%
10%
t_F
t_{SKEW = |} t_PLH - t_{PHL |}
Figure 9. Driver Propagation Delays
3V
DE
1.5V
0V
Y, Z
V_OL
Y, Z
0V
1.5V
t_DZL(SHDN), t_DPL
t_DLZ
2.3V _{OUTPUT NORMALLY LOW}
OUTPUT NORMALLY HIGH
2.3V
D_ZH(SHDN), D_ZH
D_HZ
V_OL +0.5V
V_OH -0.5V
Figure 10. Driver Enable and Disable Times
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