MxL83121

RS-485 Transceiver with Extended IEC ESD and EFT Protection
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Overview

Information RS-485 Transceiver with Extended IEC ESD and EFT Protection
Supported Protocols RS-485, RS-422
Supply Voltage (Nom) (V) 3.3, 5
No. of Tx 1
No. of Rx 1
Duplex Half
Data Rate (MAX) (Mbps) 0.25
EFT (±kV) 2
HBM ESD (kV) 15
IEC 61000-4-2 Contact (±kV) 12
Rx Fail-Safe Advanced
Multi-Drop Nodes 256
Transient Tolerance (V) -
Fault Tolerance (V) -15 to 15
VL Pin -
Temperature Range (°C) -40 to 125
Package NSOIC-8
ICC (Max) (mA) 1.5
Shutdown
Typ Shutdown Current (µA) 0.1
Hot Swap
PROFIBUS (5V) or High Output (3V)
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The MxL83121 and MxL83122 (MxL8312x family) of half-duplex RS-485 transceivers support up to 500kbps communication in harsh industrial environments. The bus pins tolerate high levels of IEC electrical fast transients (EFT), IEC electrostatic discharge (ESD), and provide an extended common mode range.

Two product options with slew controlled 250kbps and 500kbps speeds are specifically designed to excel at long-distance communication. The combination of integrated EFT and ESD protection, wide common mode, and low slew rate provide a high degree of protection, immunity to noise, and ultra-low EMI.

High receiver input impedance allows 256 transceivers to share a common data bus while maintaining signal margin and without excessive loading or use of expensive repeaters. Enhanced failsafe circuitry ensures receivers provide the expected output when the bus is shorted or left open under both terminated and unterminated conditions. Drivers include built-in short-circuit protection and a thermal-overload shutdown to protect against excessive power dissipation from bus contention.

  • Meets or exceeds the requirements of the TIA/EIA-485A standard
  • Low slew-rate drivers for reliable long-distance communication
  • Differential output exceeds 2.1V for PROFIBUS compatibility with a 5V supply
  • Wide supply range from 3.0 to 5.5V 
  • Extended operating temperature range from –40°C to 125°C
  • Extended operational common-mode range of ±12V
  • Low-power shutdown mode
  • Enhanced failsafe protection for open, short, idle
  • Glitch-free power-up/down hot plug capability
  • 1/8 unit load (256 bus nodes)
  • Drop-in compatible NSOIC package
  • Robust system protection
    • ±2kV EFT (IEC 61000-4-4)
    • ±12kV ESD Contact (IEC 61000-4-2)
    • ±15kV ESD Human Body Model

  • Motor drives
  • HVAC systems
  • Industrial and single-board computers
  • Smart Grid
  • Building security and automation
  • Industrial and process control equipment
  • Industrial transport

Documentation & Design Tools

Type Title Version Date File Size
Data Sheets RS-485/422 Transceivers with Extended IEC ESD and EFT Protection R00 August 2024 1.1 MB
Application Notes RS-485 Transceivers in Fieldbus Networks R00 October 2024 2.4 MB
Application Notes Electric Fast Transient (EFT) Application Note R00 September 2024 2.5 MB
Product Flyers MxL83121, MxL83122 Half-Duplex RS-485 Flyer R02 November 2024 960.7 KB
Product Brochures Interface Brochure R01 June 2024 3.6 MB
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Quality & RoHS

Part Number RoHS | Exempt RoHS Halogen Free REACH TSCA MSL Rating / Peak Reflow Package
MxL83121E-ADA-R N Y Y Y Y L1 / 260ᵒC NSOIC8

Click on the links above to download the Certificate of Non-Use of Hazardous Substances.

Additional Quality Documentation may be available, please Contact Support.

Parts & Purchasing

Part Number Pkg Code Min Temp Max Temp Status Buy Now Order Samples
MXL83121E-ADA-R NSOIC8 -40 125 Active Order

Part Status Legend
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.

Packaging

Pkg Code Details Quantities Dimensions
NSOIC8
  • JEDEC Reference: MS-012
  • MSL Pb-Free: L1 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 128.4ºC/W (std); 96.8ºC/W (fused)
  • Bulk Pack Style: Tube
  • Quantity per Bulk Pack: 98
  • Quantity per Reel: 2500
  • Quantity per Tube: 98
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): 330 x 12 x 8
  • Tape & Reel Unit Orientation: Quadrant 1
  • Dimensions: mm
  • Length: 4.90
  • Width: 3.90
  • Thickness: 1.75
  • Lead Pitch: 1.27