Datasheet

MAX13442E/MAX13443E/MAX13444E
±15kV ESD-Protected, ±80V Fault-Protected,
Fail-Safe RS-485/J1708 Transceivers
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Pin Description
PIN
MAX13442E
MAX13443E
MAX13444E
NAME FUNCTION
1 1 RO
Receiver Output. If the receiver is enabled and (V
A
- V
B
)  -50mV,
RO = high; if (V
A
- V
B
)  -200mV, RO = low.
2 2 RE Receiver Output Enable. Pull RE low to enable RO.
3 — DE
Driver Output Enable. Force DE high to enable driver. Pull DE low
to three-state the driver output. Drive RE high and pull DE low to
enter low-power shutdown mode.
4 — DI
Driver Input. A logic-low on DI forces the noninverting output low
and the inverting output high. A logic-high on
DI forces the noninverting output high and the inverting output
low.
5 5 GND Ground
6 6 A Noninverting Receiver Input/Driver Output
7 7 B Inverting Receiver Input/Driver Output
8 8 V
CC
Positive Supply, V
CC
= +4.75V to +5.25V. For normal operation,
bypass V
CC
to GND with a 0.1μF ceramic capacitor. For full ESD
protection, bypass V
CC
to GND with 1μF ceramic capacitor.
— 3 DE
Driver Output Enable. Pull DE low to enable the outputs. Force DE
high to three-state the outputs. Drive RE and DE high to enter low-
power shutdown mode.
— 4 TXD
J1708 Input. A logic-low on TXD forces outputs A and B to the
dominant state. A logic-high on TXD forces outputs A and B to
the recessive state.