Specifications

Motor Control
High-accuracy motor control with encoder data interfaces
108 Maxim Industrial Solutions
Benefits
• Improve reliability during handling
and installation in environments with
high-static charge
– Industry’s highest ESD protection
– ±35kV Human Body Model (HBM)
– ±20kV IEC 61000-4-2 (Air Gap)
– ±10kV IEC 61000-4-2 (Contact)
• Rugged performance in housings near
motors running at high temperatures
and in the harshest environments
– Wide -40°C to +125°C operating
temperature range
• Allow smaller encoder enclosures
– Space-saving tiny 8-pin (3mm x 3mm)
TDFN package
MAX14840E/MAX14841E
The MAX14840E/MAX14841E are 3.3V high-speed (40Mbps), half-
duplex RS-485 transceivers ideally suited for industrial applications
where extended-cable-length communication is required. The
MAX14840E features a symmetrical fail-safe receiver and larger
receiver hysteresis. It provides improved noise rejection and
improved recovered signals in high-speed and long-cable
applications. The MAX14841E has true fail-safe receiver inputs,
guaranteeing a logic-high receiver output when inputs are shorted
or open. The MAX14840E/MAX14841E are ideal for harsh motor-
control environments.
Extend cable lengths in harsh motor-control environments with high-speed
RS-485 transceivers
Functional diagram of the MAX14840E/
MAX14841E transceivers.
RO
DI
A
B
DE
GND
V
CC
R
D
RE
SHUTDOWN
MAX14840E
MAX14841E