|Information||1Mbps 3.0V to 5.5V RS-232 1-driver/1-receiver with low-power shutdown|
|Supply Voltage (Nom) (V)||3.3, 5|
|No. of Tx||1|
|No. of Rx||1|
|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 SP3220E devices are RS-232 driver/receiver solutions intended for portable or hand-held applications such as palmtop computers, instrumentation and consumer products. These devices incorporate a high-efficiency charge-pump power supply that allows the SP3220E devices to deliver true RS-232 performance from a single power supply ranging from +3.0V to +5.0V. This charge pump requires only 0.1μF capacitors in 3.3V operation. The ESD tolerance of these devices is over ±15kV for both Human Model and IEC1000-4-2 Air discharge test methods. All devices have a low-power shutdown mode where the driver outputs and charge pumps are disabled. During shutdown, the supply current falls to less than 1μA.
- Meets All EIA-232 and ITU V.28 Specifications from a wide +3.0V to +5.5V power supply
- Interoperable with RS232 and V.28 at 2.7V
- Supports High Serial Data Rates: 1 Mbps SP3220EU
- 1μA Low Power Shutdown Mode
- Footprint Compatible with MAX3221E, ISL3221
- 4 x 0.1μF External Charge Pump Capacitors
- Tri–State/Receiver Enable
- Improved ESD Specifications:
- +15kV Human Body Model
- +15kV IEC1000-4-2 Air Discharge
- +8kV IEC1000-4-2 Contact Discharge
Documentation & Design Tools
|Data Sheets||SP3220E/EB/EU +3.0V to +5.5V RS-232 Driver/Receiver Pair||1.0.3||May 2020||606.1 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.
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.