MAX14840PMB1 Peripheral Module

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The MAX14840PMB1 peripheral module provides the necessary hardware to interface the MAX14840E RS-485 transceiver to any system that utilizes Pmod™-compatible expansion ports configurable for a UART interface. The IC is a +3.3V ESD-protected transceiver 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 IC features symmetrical fail-safe and larger receiver hysteresis, providing improved noise rejection and improved recovered signals in high-speed and long-cable applications.

Refer to the MAX14840E IC data sheet for detailed information regarding operation of the IC.

MAX14840PMB1 Board Photo MAX14840PMB1 Board Photo Enlarge+

Key Features

  • Half-Duplex RS-485 Transceivers
  • 40Mbps Maximum Data Rate
  • Large (170mV) Receiver Hysteresis
  • Symmetrical Fail-Safe Receiver Input
  • Hot-Swap Capability
  • Short-Circuit-Protected Outputs
  • Thermal Self-Protection
  • Extended ESD Protection for RS-485 I/O Pins
  • 6-Pin Pmod-Compatible Connector (Pmod Interface Type 4 UART)
  • Example Software Written in C for Portability
  • RoHS Compliant
  • Proven PCB Layout
  • Fully Assembled and Tested


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

Technical Documents

User Guide 5483 Analog Essentials Getting Started Guide for Zedboard
Brochure 5468 Maxim Analog Essentials Collection
User Guide 5466 Analog Essentials Getting Started Guide for LX9 and Nexys3

Quality and Environmental Data

Request Reliability Report for: MAX14840PMB1 
Lead-Free Package Tin (Sn) Whisker Reports
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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