|Information||3-Driver / 5-Receiver Intelligent +3.0V to +5.5V RS-232 Transceiver|
|Supply Voltage (Nom) (V)||3.3, 5|
|No. of Tx||3|
|No. of Rx||5|
|Data Rate (kbps)||1000|
|HBM ESD (kV)||15|
|IEC 61000-4-2 Contact (±kV)||8|
|Int. Charge Pump||✔|
|No. of Ext Caps||4|
|Nom Cap Value (µF)||0.1|
|Temperature Range (°C)||-40 to 85|
The MxL83947 device is a 3 driver/5 receiver RS-232 transceiver intended for portable or hand-held applications such as notebook and industrial computers. The MxL83947 includes one complementary receiver that remains alert to monitor an external device’s Ring Indicate signal while the device is shut down. The device is optimized for high speed with data rates up to 1Mbps, and low propagation delays and channel to channel skew, easily meeting the demands of high-performance RS-232 applications. The MxL83947 uses an internal high-efficiency charge-pump power supply that requires only 0.1µF capacitors for operation. This charge pump and MaxLinear’s driver architecture allow the device to deliver compliant RS-232 performance from a single power supply ranging from +3.0V to +5.5V. The AUTO-ONLINE® 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 0.8µA.
- Industry standard pinout
- Meets true EIA/TIA-232-F Standards from a +3.0V to +5.5V power supply
- 1Mbps data rate
- AUTO-ONLINE® circuitry automatically wakes up from a 0.8µA shutdown
- Regulated charge pump yields stable RS-232 outputs regardless of VCC variations
- Enhanced ESD specifications:
- ±15kV Human Body Model
- ±15kV IEC1000-4-2 Air Discharge
- ±8kV IEC1000-4-2 Contact Discharge
- Ideal for high-speed RS-232 applications
Documentation & Design Tools
|Data Sheets||MxL83947 3-Driver / 5-Receiver Intelligent +3.0V to +5.5V RS-232 Transceiver||01||July 2022||354 KB|
|Application Notes||RS-232 and RS-485 PCB Layout Application Note||R00||December 2022||2.8 MB|
|Product Brochures||Interface Brochure||June 2023||3.7 MB|
Quality & RoHS
|Part Number||RoHS | Exempt||RoHS||Halogen Free||REACH||TSCA||MSL Rating / Peak Reflow||Package|
|MxL83947-AQB-R||N||Y||Y||Y||Y||L2 / 260ᵒC||QFN32 5x5 OPT1|
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|
|MXL83947-AQB-R||QFN32 5x5 OPT1||-40||85||Active||Order|
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.
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.
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)
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.