SP3221E


Intelligent +3.0V to +5.5V RS-232 Transceiver

Features

  • 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 typical shutdown
  • Minimum 250kbps data rate under load
  • 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
Applications

  • Low Power Serial Communications
  • Portable Serial Devices
  • Point of Sale Equipment
  • Embedded PCs
Description

The SP3221E is a 1-driver/1-receiver RS-232 transceiver intended for portable or battery-powered applications such as embedded computers, data logging devices, medical diagnostics, and remote sensors. This device uses an internal high-efficiency, charge-pump power supply that requires only four 0.1µA capacitors. This charge pump and Exar's driver architecture allow the SP3221E to deliver compliant RS-232 performance from a single power supply ranging from +3.0V to +5.5V. The SP3221E is offered in a 16 pin TSSOP package.

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:  serialtechsupport@exar.com.

Part NumberPkg CodeRoHSMin
Temp.
(°C)
Max
Temp.
(°C)
StatusBuy NowOrder Samples
SP3221ECA-LSSOP16SSOP16070Active
SP3221ECA-L/TRSSOP16SSOP16070Active
SP3221ECY-LTSSOP16TSSOP16070Active
SP3221ECY-L/TRTSSOP16TSSOP16070Active
SP3221EEA-LSSOP16SSOP16-4085Active
SP3221EEA-L/TRSSOP16SSOP16-4085Active
SP3221EEY-LTSSOP16TSSOP16-4085Active
SP3221EEY-L/TRTSSOP16TSSOP16-4085Active

Part Status Legend
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. 
Specifications
No. of Tx1
No. of Rx1
Data Rate (kbps)250
ESD (KV)15
Vcc MIN. (V)3
Vcc MAX. (V)5.5
Vcc (V)3.3
Int.Chrg. PumpYes
No. of Ext Caps4
Nom Cap. Value (µF)0.1
ShutdownYes
TTL Tri-stateYes
Technical Assets
Datasheet