|Information||Wide Supply 18V Tolerant RS-485/RS-422 Transceivers|
|Supported Protocols||RS-422, RS-485|
|Supply Voltage (Nom) (V)||3.3, 5|
|No. of Tx||1|
|No. of Rx||1|
|HBM ESD (kV)||15|
|IEC 61000-4-2 Contact (±kV)||8|
|Temperature Range (°C)||-40 to 85|
|Data Rate (MAX) (Mbps)||0.25|
|ICC (Max) (mA)||0.6|
|Typ Shutdown Current (µA)||0.04|
|PROFIBUS (5V) or High Output (3V)|
The XR33032/35/38 family of high performance half duplex RS-485 transceivers are optimized to operate over a wide range of supply voltage, from +2.8V to +5.5V. The analog bus pins can withstand direct shorts up to ±18V, and are protected against ESD events up to ±15kV.
In an isolated application it may be more efficient to use a remote power supply rather than generating an isolated supply at every node. The XR33032/35/38 transceivers can operate with more than 2V IR drop in the cable when utilizing a remote 5V power supply. The transceivers draw less than 600μA, and typically only 300μA when idling with the receivers active.
The receivers include full fail-safe circuitry, guaranteeing a logic-high receiver output when the receiver inputs are open, shorted, or undriven. The receiver input impedance is 96kΩ (1/8 unit load), allowing up to 256 devices on the bus while preserving the full signal margin.The drivers are protected by short circuit detection as well as thermal shutdown, and maintain high impedance in shutdown or when powered off. The XR33032 and XR33035 drivers are slew limited for reduced EMI and error-free communication over long or unterminated data cables.
The DE and RE pins include hot swap circuitry to prevent false transitions on the bus during power-up or live insertion, and can enter a low current shutdown mode (40nA typically) for extreme power savings.
- +2.8V to +5.5V Operating Range
- ±18V Fault Tolerance on Analog Bus pins
- Robust ESD (ElectroStatic Discharge) Protection:
- ±15kV IEC 61000-4-2 Air Gap Discharge
- ± 8kV IEC 61000-4-2 Contact Discharge
- ±15kV Human Body Model
- ± 4kV Human Body Model on non-bus pins
- 300µA Idle Current, 40nA Shutdown Current
- Enhanced Receiver Fail-Safe Protection for Open, Shorted, or Terminated but Idle Data Lines
- Hot-Swap Glitch Protection on DE and RE Pins
- Driver Short Circuit Current Limit and Thermal Shutdown for Overload Protection
- 1/8th Unit Load Allows up to 256 Devices on Bus
- Industry Standard 8 NSOIC Half Duplex Package
- Isolated Multipoint RS-485 Data Buses
- Remote Nodes Powered by the Host
- Building Automation and HVAC
- Industrial Process Control Networks
- Remote Utility Meter Reading
- Energy Monitoring and Control
Documentation & Design Tools
|Data Sheets||XR33032/35/38 Data Sheet||1.0.1||August 2021||1.2 MB|
|Application Notes||DAN-190, MaxLinear UARTs in RS-485 Applications||2||December 2022||2.3 MB|
|Application Notes||RS-232 and RS-485 PCB Layout Application Note||R00||December 2022||2.8 MB|
|Application Notes||AN-292, RS-485 Cable Lengths vs Data Signaling Rate||R01||July 2022||2.7 MB|
|Application Notes||AN-291, RS-485 Advanced Fail-Safe Feature||00||January 2022||920.5 KB|
|Product Brochures||Interface Brochure||October 2022||3.8 MB|
Quality & RoHS
|Part Number||RoHS | Exempt||RoHS||Halogen Free||REACH||TSCA||MSL Rating / Peak Reflow||Package|
Click on the links above to download the Certificate of Non-Use of Hazardous Substances.
Parts & Purchasing
|Part Number||Pkg Code||Min Temp||Max Temp||Status||Buy Now||Order Samples|
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.
FAQs & Support
Search our list of FAQs for answers to common technical questions.
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Submit a Technical Support Question As a New Question
For RS-232 it is 50 feet (15 meters), or the cable length equal to a capacitance of 2500 pF, at a maximum transmission rate of 19.2kbps. When we reduce the baud rate, it allows for longer cable length. For Example:
Baud Rate (bps)
Maximum RS-232 Cable Length (ft)
Fail Safe is an attempt to keep the output of the RS-485 receiver to a known state. Transceivers may have standard fail safe or advanced / enhanced receiver fail safe features. Standard fail safe supports open inputs while enhanced fail safe transceivers such as the SP339 and XR34350 support open input, shorted input and undriven terminated lines without external biasing. See Application Note ANI-22 for more detail.
The Parts & Purchasing section of the product page shows the Status of all orderable part numbers for that product. Click Show obsolete parts, to see all EOL or OBS products.