The XR33155 is a high performance RS-485/RS-422 transceiver designed for improved performance in noisy industrial environments and increased tolerance to system faults.
The analog bus pins can withstand direct shorts up to ±60V and are protected against ESD events up to ±15kV HBM. An extended ±25V common mode operating range allows for more reliable operation in noisy environments.
The receiver includes full fail-safe circuitry, guaranteeing a logic high receiver output when the receiver input is open, shorted or undriven. The XR33155 receiver input impedance is at least 120kΩ (1/10 unit load), allowing more than 320 devices on the bus.
The driver is protected by short circuit detection as well as thermal shutdown and maintains high impedance in shutdown or when powered off.
The XR33155 is a half-duplex transceiver offered in an 8-pin NSOIC package that operates at a maximum data rate of 1Mbps.
- 3.0V to 5.5V operation
- ±60V fault tolerance on analog bus pins
- Extended ±25V common mode operation
- Robust ESD protection:
- ±15kV HBM (bus pins)
- ±4kV HBM (all other pins)
- Invert control to correct for reversed bus pins
- Enhanced receiver fail-safe protection for open, shorted or terminated but idle data lines
- 1µA (max) standby current
- Driver short circuit current limit and thermal shutdown for overload protection
- Reduced unit loads allows up to 320 devices on bus
- Industry standard 14-pin NSOIC package
- -40°C to 85°C and -40°C to 105°C ambient operating temperature range
- XR33052 – Half Duplex, 250kbps with hot swap protection
- XR33053 – Full Duplex, 1Mbps with hot swap protection
- XR33055 – Half Duplex, 1Mbps with hot swap protection
- XR33058 – Half Duplex, 20Mbps with hot swap protection
- XR33152 – Half Duplex, 250kbps with invert control
- XR33156 – Full duplex, 20Mbps with VL pin, hot swap protection and invert control
- XR33158 – Half duplex, 20Mbps with invert control
- Industrial control networks
- HVAC networks
- Building and process automation
- Remote utility meter reading
- Energy monitoring and control
- Long or unterminated transmission lines
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.
Quality & Environmental Data
|Part Number||RoHS | Exempt||RoHS||Halogen Free||REACH||MSL Rating / Peak Reflow||Package|
|XR33155ID-F||N||Y||Y||Y||L1 / 260ᵒC||NSOIC8|
|XR33155IDTR-F||N||Y||Y||Y||L1 / 260ᵒC||NSOIC8|
|XR33155HD-F||N||Y||Y||Y||L1 / 260ᵒC||NSOIC8|
|XR33155HDTR-F||N||Y||Y||Y||L1 / 260ᵒC||NSOIC8|
Click on the links above to download the Certificate of Non-Use of Hazardous Substances.
Search our list of FAQs for answers to common technical questions.
For material content, environmental, quality and reliability questions review the Quality tab or visit our Quality page.
For ordering information and general customer service visit our Contact Us page.
Frequently Asked Questions
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.
Find the product page of the part that you want to get an evaluation board for and click on Parts & Purchasing. Example:
Find the icons under Buy Now or Order Samples:
Click on the Buy Now icon and see who has stock and click on the Buy button:
Alternatively, you can click on the Order Samples
If the icons are missing, then contact Customer Support.
In this example, we looked for XRA1201. Click on part number header or on the link at the bottom of the result. This brings you to the product page. For example:
Click on Parts & Purchasing, highlighted with the blue arrow above. The screen changes to:
Notice the status column and the “Show obsolete parts” link. A legend tells you the definition of the different statuses. Click on the “Show obsolete parts” link to see EOL or OBS part numbers along with the Active part numbers, the legend still present:
Another method to find out if a part is OBS or EOL is to click on SUPPORT at the top:
And then Product Change Notifications:
Type the part into the search, and click on one of the part numbers from the drop down menu. Then you can look for the Product Discontinuation Notice, which generally is at the top of the list, for example:
If you see this, it tells you that this particular orderable part has been discontinued and when the last order date is, or was. If you click on the file, then you can view the notice we sent about this if you purchased the part in the recent past. It may also advise of a replacement part. When an orderable part first becomes discontinued, Product Discontinuation Notices are sent are sent to those who have purchased the parts in the recent past, if purchased directly, with a dated opportunity to place a last order.
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