MAX14840E Datasheet, PDF (1/15 Pages) Maxim Integrated Products – 40Mbps, +3.3V, RS-485 Half-Duplex Transceivers

19-5131; Rev 0; 2/10
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 communi-
cation up to 40Mbps. These transceivers are optimized
for high speeds over extended cable runs while minimiz-
ing tolerance to noise.
The MAX14840E features symmetrical fail-safe and larg-
er receiver hysteresis, providing improved noise rejec-
tion 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 transceivers draw 1.5mA
(typ) supply current when unloaded or when fully loaded
with the drivers disabled. Hot-swap capability eliminates
undesired transitions on the bus during power-up or hot
insertion.
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 automotive
temperature range.
Motion Controllers
Fieldbus Networks
Industrial Control Systems
Backplane Buses
HVAC Networks
Applications
Features
S Half-Duplex RS-485 Transceivers
S +3.3V Supply Voltage
S 40Mbps Maximum Data Rate
S Large (170mV) Receiver Hysteresis on
MAX14840E
S Symmetrical Fail-Safe Receiver Input on
MAX14840E
S Fail-Safe Receiver Input (MAX14841E)
S Hot-Swap Capability
S Short-Circuit Protected Outputs
S Thermal Self-Protection
S Low 10µA (max) Shutdown Current
S Extended ESD Protection for RS-485 I/O Pins
±35kV Human Body Model (HBM)
±20kV Air-Gap Discharge per IEC 61000-4-2
±12kV Contact Discharge per IEC 61000-4-2
S Automotive -40°C to +125°C Operating
Temperature Range
S Available in Industry-Standard 8-Pin SO or
Space-Saving, 8-Pin TDFN-EP (3mm x 3mm)
Packages
Ordering Information/Selector Guide
PART
MAX14840EASA+
MAX14840EATA+
MAX14841EASA+
MAX14841EATA+
FAIL SAFE
Symmetrical
Symmetrical
True
True
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
TEMP RANGE
-40NC to +125NC
-40NC to +125NC
-40NC to +125NC
-40NC to +125NC
PIN-PACKAGE
8 SO
8 TDFN-EP*
8 SO
8 TDFN-EP*
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For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.