MAX14840E_15 Datasheet, PDF (1/16 Pages) Maxim Integrated Products – 40Mbps, +3.3V, RS-485 Half-Duplex Transceivers

MAX14840E/MAX14841E 40Mbps, +3.3V, RS-485 Half-Duplex Transceivers
General Description
The MAX14840E/MAX14841E are +3.3V ESD-protected
transceivers intended for half-duplex RS-485 communica-
tion up to 40Mbps. These transceivers are optimized for
high speeds over extended cable runs while maximizing
tolerance to noise.
The MAX14840E features symmetrical fail-safe and larg-
er receiver hysteresis, providing 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 available in 8-pin SO
and small, 8-pin (3mm x 3mm) TDFN-EP packages. Both
devices operate over the -40NC to +125NC temperature
range.
Applications
●● Motion Controllers
●● Fieldbus Networks
●● Industrial Control Systems
●● Backplane Buses
●● HVAC Networks
Ordering Information/Selector Guide appears at end of data
sheet.
Benefits and Features
●● High ESD Protection Provides Increases Equipment
Uptime
• ±35kV Human Body Model (HBM) per JEDEC
JS-001-2012
• ±20kV Air Gap Discharge per IEC 61000-4-2
• ±12kV Contact Discharge per IEC 61000-4-2
●● Integrated Features Increases Robustness
• Large 170mV Receiver Hysteresis (MAX14840) for
High Receiver Noise Tolerance
• True Fail Safe Receiver Input (MAX14841E) Keeps
Receiver Output Logic-High Upon Shorts and
Open On Receiver Input
• Thermal Self-Protection Shutdown at 160°C
Junction Temperature
• High Industrial -40°C to +125°C Ambient Operating
Temperature Range/-40°C to +150°C Junction
Temperature Range
• Hot Swap Capability Eliminates False Transition
During Power-Up or Hot Insertion
●● Low Current Reduces Power Requirements
• 10µA (max) Shutdown Current
• 1.5mA (typ) Supply Current
• 3.3V Supply Voltage
●● Available in Industry Standard 8-Pin SO or
Space-Saving 8-Pin TDFN-EP (3mm x 3mm) Packages
Functional Diagram
VCC
MAX14840E
MAX14841E
RO
R
RE
B
SHUTDOWN
DE
A
DI
D
GND
19-5131; Rev 2; 7/15