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

 

Part Number	Replacement	Explanation

Description

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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.

MAX14840E, MAX14841E: Functional Diagram Enlarge+

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

Applications/Uses

• Backplane Buses
• Fieldbus Networks
• HVAC Networks
• Industrial Control Systems
• Motion Controllers