Datasheet

MAX1481/MAX1484/MAX1485/MAX1486
Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited,
12Mbps, RS-485/RS-422 Transceivers in µMAX Package
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R
R
Y
Z
V
OD
V
OC
Figure 5. Driver DC Test Load
RECEIVER
OUTPUT
TEST POINT
1k
1k
S1
S2
V
CC
C
L
Figure 6. Receiver Enable/Disable Timing Test Load
DI
DE
3V
Y
Z
C
L1
C
L2
R
DIFF
V
ID
Figure 7. Driver Timing Test Circuit
OUTPUT
UNDER TEST
500Ω
S1
S2
V
CC
C
L
Figure 8. Driver Enable/Disable Timing Test Load
DI
3V
0V
Z
Y
V
O
0V
-V
O
V
O
1.5V
t
DPLH
1/2 V
O
10%
t
R
90%
90%
t
DPHL
1.5V
1/2 V
O
10%
t
F
V
DIFF
= V
Y
- V
Z
V
DIFF
t
SKEW = |
t
PLH
- t
PHL |
Figure 9. Driver Propagation Delays
OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
3V
0V
Y, Z
V
OL
Y, Z
0V
1.5V 1.5V
V
OL
+0.5V
V
OH
-0.5V
2.3V
2.3V
t
DZL(SHDN)
, t
DPL
t
DLZ
D
ZH(SHDN)
, D
ZH
D
HZ
DE
Figure 10. Driver Enable and Disable Times