SLLS824B August   2007  – December 2023 TRSF3223E

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Specifications
    1. 4.1  Absolute Maximum Ratings
    2. 4.2  Recommended Operating Conditions
    3. 4.3  ESD Ratings
    4. 4.4  ESD Ratings - IEC Specifications
    5. 4.5  Thermal Information
    6. 4.6  Electrical Characteristics
    7. 4.7  Electrical Characteristics, Driver
    8. 4.8  Switching Characteristics, Driver
    9. 4.9  Electrical Characteristics, Receiver
    10. 4.10 Switching Characteristics, Receiver
    11. 4.11 Electrical Characteristics, Auto-Powerdown
    12. 4.12 Switching Characteristics, Auto-Powerdown
  6. 5 Parameter Measurement Information
  7. 6 Detailed Description
    1. 6.1 Functional Block Diagram
    2. 6.2 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Typical Application
      1. 7.1.1 Detailed Design Procedure
  9. 8 Device and Documentation Support
    1. 8.1 Receiving Notification of Documentation Updates
    2. 8.2 Support Resources
    3. 8.3 Trademarks
    4. 8.4 Electrostatic Discharge Caution
    5. 8.5 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

3 Description

The TRSF3223E consists of two line drivers, two line receivers, and a dual charge-pump circuit with ±15-kV ESD protection pin to pin (serial-port connection pins, including GND). This device meets the requirements of TIA/EIA-232-F and provides the electrical interface between an asynchronous communication controller and the serial-port connector. The charge pump and four small external capacitors allow operation from a single 3-V to 5.5-V supply. The TRSF3223E operates at typical data signaling rates up to 1000 kbits.

Flexible control options for power management are available when the serial port is inactive. The auto-powerdown feature functions when FORCEON is low and FORCEOFF is high. During this mode of operation, if the device does not sense a valid RS-232 signal, the driver outputs are disabled. If FORCEOFF is set low and EN is high, both drivers and receivers are shut off, and the supply current is reduced to 1 mA. Disconnecting the serial port or turning off the peripheral drivers causes auto-powerdown to occur. Auto-powerdown can be disabled when FORCEON and FORCEOFF are high. With auto-powerdown enabled, the device is automatically activated when a valid signal is applied to any receiver input. The INVALID output is used to notify the user if an RS-232 signal is present at any receiver input. INVALID is high (valid data) if any receiver input voltage is greater than 2.7 V or less than –2.7 V, or has been between –0.3 V and 0.3 V for less than 30 μs. INVALID is low (invalid data) if the receiver input voltage is between –0.3 V and 0.3 V for more than 30 μs. Refer to Figure 5-4 for receiver input levels.

Package Information
PART NUMBER PACKAGE(1) PACKAGE SIZE(2)
TRSF3223E SOIC (DW, 20) 12.8 mm × 10.3 mm
SSOP (DB, 20) 7.2 mm × 7.8 mm
TSSOP (PW, 20) 6.5 mm x 6.4 mm
VQFN (RGW, 20) 5 mm x 5mm
(1) For more information, see Section 10.
(2) The package size (length × width) is a nominal value and includes pins, where applicable.