MAX14841E:40Mbps, +3.3V, RS-485 Half-Duplex Transceivers

Low-Voltage, High-Speed RS-485 Transceivers Increase Data Rates and Extend Cable Lengths

The MAX14840E/MAX14841E are +3.3V ESD-protected transceivers intended for half-duplex RS-485 communication 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 larger 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 -40°C to +125°C automotive temperature range.

Key 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
MAX14840E, MAX14841E: Functional Diagram
MAX14840E, MAX14841E: Functional Diagram
Applications/Uses
  • Backplane Buses
  • Fieldbus Networks
  • HVAC Networks
  • Industrial Control Systems
  • Motion Controllers
DataSheet
titleDownload file
MAX14840E-MAX14841E Data SheetMAX14840E-MAX14841E.pdf
Parametrics
Part NumberTx/RxDuplexVSUPPLY
(V)
ICC
(mA)
Data Rate
(kbps)
ESD Protect.
(±kV)
Tx ENRx ENICC (Shutdn.)
(µA)
Rx/Tx on BusRx Failsafe w/ InputsSlew Rate LimitingOper. Temp.
(°C)
Package/PinsBudgetary
Price
typmintypSee Notes
MAX14840E1Tx + 1RxHalf3.31.54000035YesYes1032OpenNo-40 to +125SOIC(N)/8
TDFN-EP/8
$2.10 @1k
MAX14841EOpen or Shorted-SOIC(N)/8
TDFN-EP/8
Design kits & evaluation modules
Quality and Environmental Data
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX14841EASA+ActiveSOIC(N),;8 pin;30.9 mm²-40°C to +125°CLead Free
MAX14841EASA+TActiveSOIC(N),;8 pin;30.9 mm²-40°C to +125°CLead Free
MAX14841EATA+ActiveTDFN-EP,;8 pin;9.6 mm²-40°C to +125°CLead Free
MAX14841EATA+TActiveTDFN-EP,;8 pin;9.6 mm²-40°C to +125°CLead Free
MAX14840E-MAX14841E.pdf MAX14841E
MAX14841E.pdf MAX14841E