MAX13410E–MAX13415E
RS-485 Transceiver with Integrated Low-Dropout
Regulator and AutoDirection Control
14 ______________________________________________________________________________________
Pin Description
MAX13412E/
MAX13413E
MAX13414E/
MAX13415E
NAME FUNCTION
1—1RO
Receiver Output. When receiver is enabled and V
A
- V
B
≥ -50mV,
RO is high. If V
A
- V
B
≤ -200mV, RO is low. Note: RO is referenced to
the LDO output (V
REG
).
2——RE
Receiver Output Enable. Drive RE low to enable RO. Drive RE high to
disable the RO output and put the RO output in a high-impedance
state.
3——DE
D r i ver Outp ut E nab l e. D r i ve D E l ow to p ut the d r i ver outp ut i n thr ee- state.
D r i ve D E hi g h to enab l e the d r i ver .
444DI
Driver Input. Drive DI low to force the noninverting output low and the
inverting output high. Drive DI high to force the noninverting output
high and inverting output low. DI is an input to the internal state
machine that automatically enables and disables the driver (for the
MAX13412E/MAX13413E). See the function tables and General
Description for more information.
5 5 5 GND Ground
6 6 6 A Noninverting Receiver Input and Noninverting Driver Output
7 7 7 B Inverting Receiver Input and Inverting Driver Output
888V
CC
Positive Supply. Bypass V
CC
with a 0.1µF ceramic capacitor to GND.
—1—RO
Receiver Output. When receiver is enabled and V
A
- V
B
≥ -100mV,
RO is high. If V
A
- V
B
≤ -100mV, RO is low. Note: RO is referenced to
the LDO output (V
REG
).
—2—RE
Receiver Output Enable. Drive RE low to force the RO output to be
enabled. Drive RE high to let the AutoDirection circuit control RO.
—3 3V
REG
LDO Output. V
REG
is fixed at +5V. Bypass V
REG
with a low ESR
(20mΩ or less) and a 1µF (min) ceramic capacitor.
— — 2 DE/RE
Receiver and Driver Output Enable. Drive DE/RE low to enable RO
and disable the driver. Drive DE/RE high to disable RO and enable
the driver.
EP EP EP EP
Exposed Pad. EP is internally connected to GND. For enhanced
thermal dissipation, connect EP to a copper area as large as
possible. Do not use EP as a sole ground connection.
