Datasheet

5Maxim Integrated
40Mbps, +3.3V, RS-485 Half-Duplex
Transceivers
MAX14840E/MAX14841E
Test and Timing Diagrams
Figure 1. Driver DC Test Load Figure 2. Driver Timing Test Circuit
Figure 3. Driver Propagation Delays
Figure 4. Driver Enable and Disable Times (t
DZH
, t
DHZ
)
V
OD
A
B
V
OC
R
L
2
R
L
2
R
L
C
L
V
OD
V
CC
DI
DE
A
B
1.5V 1.5V
t
DPHL
t
DPLH
V
OD
0
B
A
10%
90%
10%
90%
0
-V
O
V
OD
t
DSKEW =
t
DPLH
- t
DPHL

V
OD
= [V
A
- V
B
]
V
CC
V
O
f = 1MHz, t
LH
= 3ns, t
HL
= 3ns
t
LH
t
HL
0
0
0.25V
1.5V
t
DZH
, t
DZH(SHDN)
t
DHZ
DE
V
CC
V
OH
1.5V
OUT
R
L =
110I
50I
OUT
S1
A
B
D
DI
GND OR V
CC
GENERATOR
DE
C
L
50pF