|Information||Intelligent +3.0V to +5.5V RS-232 Transceivers|
|Supply Voltage (Nom) (V)||3.3, 5|
|No. of Tx||2|
|No. of Rx||2|
|Data Rate (kbps)||250|
|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 SP3223 products are RS-232 transceiver solutions intended for
portable applications such as notebook and hand held computers. The
SP3223 use an internal high-efficiency, charge-pump power supply that
requires only 0.1μF capacitors in 3.3V operation. This charge pump and
Exar's driver architecture allow the SP3223 series to deliver compliant
RS-232 performance from a single power supply ranging from +3.3V to
+5.0V. The SP3223 is a 2- driver/2-receiver device ideal for
laptop/notebook computer and PDA applications.
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.
- Meets true EIA/TIA-232-F Standards from a +3.0V to +5.5V power supply
- Interoperable with EIA/TIA-232 and adheres to EIA/TIA-562 down to a +2.7V power source
- AUTO ON-LINE® circuitry automatically wakes up from a 1μA shutdown
- Minimum 250Kbps data rate under load (EB)
- 1 Mbps data rate for high speed RS-232 (EU)
- Regulated Charge Pump Yields Stable RS-232 Outputs Regardless of VccVariations
- ESD Specifications:
- ±15KV Human Body Model
- ±15KV IEC1000-4-2 Air Discharge
- ±8KV IEC1000-4-2 Contact Discharge
Documentation & Design Tools
|Data Sheets||SP3223E/EB/EU Intelligent +3.0V to +5.5V RS-232 Transceivers||1.0.2||May 2020||804.5 KB|
|Application Notes||RS-232 and RS-485 PCB Layout Application Note||R00||December 2022||2.8 MB|
|Application Notes||ANI-10, Charge Pump Capacitor Selection Guide for 3V RS-232 Products||B||December 2006||71.8 KB|
|Product Brochures||Interface Brochure||November 2023||3.7 MB|
Quality & RoHS
Parts & Purchasing
|Part Number||Pkg Code||Min Temp||Max Temp||Status||Suggested Replacement||Buy Now||Order Samples||PDN|
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.
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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)
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.