SLLSFO5A November   2021  – September 2022 TRSF3243E

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  ESD Ratings - IEC Specifications
    4. 6.4  Recommended Operating Conditions
    5. 6.5  Thermal Information
    6. 6.6  Electrical Characteristics
    7. 6.7  Electrical Characteristics: Driver
    8. 6.8  Switching Characteristics: Driver
    9. 6.9  Electrical Characteristics: Receiver
    10. 6.10 Switching Characteristics: Receiver
    11. 6.11 Electrical Characteristics: Auto-Powerdown
    12. 6.12 Switching Characteristics: Auto-Powerdown
      1.      Parameter Measurement Information
  7. 7 Detailed Description
    1. 7.1 Overview
    2.     Functional Block Diagram
    3. 7.2 Feature Description
    4. 7.3 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
    3. 8.3 Design Requirements
    4. 8.4 Detailed Design Procedure
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
      1.      Device and Documentation Support
        1. 11.1 Receiving Notification of Documentation Updates
        2. 11.2 Support Resources
        3. 11.3 Trademarks
        4. 11.4 Electrostatic Discharge Caution
        5. 11.5 Glossary
  11. 11Mechanical, Packaging, and Orderable Information

Package Options

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

3 Description

The TRSF3243E consists of three line drivers, five line receivers, and a dual charge-pump circuit with ±15-kV ESD (HBM and IEC61000-4-2, Air-Gap Discharge) and ±8-kV ESD (IEC61000-4-2, Contact Discharge) protection on serial-port connection pins. This device 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. In addition, this device includes an always-active noninverting output (ROUT2B), which allows applications using the ring indicator to transmit data while the device is powered down. The device operates at data signaling rates up to 1 Mbit/s and an increased slew-rate range of 18 V/μs to 150 V/μs.

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, both drivers and receivers (except ROUT2B) are shut off, and the supply current is reduced to 1 μA. Disconnecting the serial port or turning off the peripheral drivers causes the auto-powerdown condition to occur.

Packaging Information
PART NUMBER PACKAGE(1) BODY SIZE (NOM)
TRSF3243E VQFN (RHB) (32) 5,00 mm × 5,00 mm
TSSOP (PW) (28) 9,70 mm × 4,40 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.

GUID-20211029-SS0I-G8KF-HD36-V5RSCCDVL3X9-low.gif Simplified Circuit