The XR32431 is a 3 driver/ 5 receiver RS-232 transceiver. The XR32431 features a variable low voltage logic interface, down to 1.65V. This product is intended for portable or hand-held applications such as notebook and palmtop computers. The XR32431EB features slew-rate limited outputs for reduced crosstalk and EMI. The XR32431EH is optimized for mid speed applications, with data rates up to 460Kbps. The XR32431EU is optimized for high speed designs with data rates up to 1Mbps, easily meeting the demands of high speed RS-232 applications.
The XR32431 uses an internal high-efficiency charge-pump power supply that requires only four 0.1μF capacitors in 3.3V operation. This charge pump combined with Exar's driver architecture allow the XR32431 to deliver compliant RS-232 performance from a single power supply ranging from +3.0V to +5.5V.
The AUTO ON-LINE® feature allows the device to automatically "wake-up" during a shutdown state when an RS-232 cable is connected and a connected peripheral is turned on. Otherwise, the device automatically shuts itself down drawing less than 1μA.
For technical support or help choosing a product please email Exar’s Serial Technical Support group at: email@example.com.
- 1.65V to 5.5V Logic Interface VL pin
- Small 5mm x 5mm 32-pin QFN package
- AUTO ON-LINE circuitry automatically wakes up from a 1µA shutdown
- Interoperable with EIA/TIA-232 and adheres to EIA/TIA-562 down to a +2.7V power source
- Enhanced ESD Specifications:
- ±15kV Human Body Model
- ±15kV IEC1000-4-2 Air Discharge
- ±8kV IEC1000-4-2 Contact Discharge
- 250Kbps/460Kbps/1Mbps min transmission rates (speed grades B/H/U)
- Meets true EIA/TIA-232-F Standards from a +3.0V to 5.5V power supply
- Regulated Charge Pump yields stable RS-232 Outputs regardless of VCC variations
- -40°C to 85°C ambient operating temperature
- Industrial and Single Board Computers
- Industrial and Process Control Equipment
- Point-Of-Sales Equipment
- Building Security and Automation
Parts & Purchasing
|Part Number||Pkg Code||RoHS||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.
|07/11/2017||Product Discontinuation Notification||PDN_17-0626-02-1033.pdf|
|07/11/2017||Product Discontinuation Notification||Product Discontinuation Notice 17-0623-02 r-1033.pdf|
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)
In this example, we looked for XRA1201. When you hover over it, it will turn grey and you can click anywhere in the grey box. This brings you to the product page. For example:
Click on Parts & Purchasing, highlighted in yellow 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:
Another method to find out if a part is OBS or EOL is to click on SUPPORT:
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.