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TRS3122E

ACTIVE

1.65- to 5.5-V 1Mbps RS-232 line driver/receiver with logic supply pin & +/-15-kV IEC-ESD protection

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Data sheet

TRS3122E

ACTIVE
Data sheet Order now

Product details

Drivers per package 2 Receivers per package 2 Logic voltage (min) (V) 1.65 Data rate (max) (MBps) 1 Main supply voltage (nom) (V) 1.65 - 5.5 Features Auto-Powerdown Plus ESD HBM (kV) 15 Rating Catalog Operating temperature range (°C) -40 to 85 Vout (typ) (V) 5.4
Drivers per package 2 Receivers per package 2 Logic voltage (min) (V) 1.65 Data rate (max) (MBps) 1 Main supply voltage (nom) (V) 1.65 - 5.5 Features Auto-Powerdown Plus ESD HBM (kV) 15 Rating Catalog Operating temperature range (°C) -40 to 85 Vout (typ) (V) 5.4
VQFN (RGE) 24 16 mm² 4 x 4
  • Extended VCC operating nodes: 1.8 V, 3.3 V, or
    5.0 V
    • Unique Tripler Charge Pump Architecture
      Enables Low VCC of 1.8V While Maintaining
      Compatibility with 3.3 V and 5 V Supplies
  • Integrated Level-Shifting Functionality Eliminates
    the Need for External Power or Additional Level
    Shifter While Interfacing with Low-Voltage MCUs
  • Enhanced ESD Protection on RIN Inputs and
    DOUT Outputs
    • ±15 kV IEC 61000-4-2 Air-Gap Discharge
    • ±8 kV IEC 61000-4-2 Contact Discharge
    • ±15 kV Human-Body Model
  • Specified 1000-kbps Data Rate
  • Auto Powerdown Plus Feature
  • Low 0.5µA Shutdown Supply Current
  • Meets or Exceeds Compatibility Requirements of
    RS-232 Interface
  • For 2.5 V Single Supply Applications, Consider
    TRS3318E as an Optimized Solution
  • Extended VCC operating nodes: 1.8 V, 3.3 V, or
    5.0 V
    • Unique Tripler Charge Pump Architecture
      Enables Low VCC of 1.8V While Maintaining
      Compatibility with 3.3 V and 5 V Supplies
  • Integrated Level-Shifting Functionality Eliminates
    the Need for External Power or Additional Level
    Shifter While Interfacing with Low-Voltage MCUs
  • Enhanced ESD Protection on RIN Inputs and
    DOUT Outputs
    • ±15 kV IEC 61000-4-2 Air-Gap Discharge
    • ±8 kV IEC 61000-4-2 Contact Discharge
    • ±15 kV Human-Body Model
  • Specified 1000-kbps Data Rate
  • Auto Powerdown Plus Feature
  • Low 0.5µA Shutdown Supply Current
  • Meets or Exceeds Compatibility Requirements of
    RS-232 Interface
  • For 2.5 V Single Supply Applications, Consider
    TRS3318E as an Optimized Solution

The TRS3122E is a two-driver and two-receiver RS-232 interface device, with split supply pins for mixed-voltage operation. All RS-232 inputs and outputs are protected to ±15 kV using the IEC 61000-4-2 Air-Gap Discharge method, ±8 kV using the IEC 61000-4-2 Contact Discharge method, and ±15 kV using the Human-Body Model.

The charge pump requires five small 0.1-µF capacitors for operation from as low as a 1.8-V supply. The TRS3122E is capable of running at data rates up to 1000 kbps, while maintaining RS-232-compatible output levels.

The TRS3122E has a unique VL pin that allows operation in mixed-logic voltage systems. Both driver in (DIN) and receiver out (ROUT) logic levels are pin programmable through the VL pin. This eliminates the need for additional voltage level shifter while interfacing with low-voltage microcontrollers or UARTs.

Auto Powerdown Plus automatically places the device in a low power mode when the device has not received or transmitted data for more than 30 seconds. This feature makes this device a very attractive option for battery powered or other power-sensitive applications.

The TRS3122E is a two-driver and two-receiver RS-232 interface device, with split supply pins for mixed-voltage operation. All RS-232 inputs and outputs are protected to ±15 kV using the IEC 61000-4-2 Air-Gap Discharge method, ±8 kV using the IEC 61000-4-2 Contact Discharge method, and ±15 kV using the Human-Body Model.

The charge pump requires five small 0.1-µF capacitors for operation from as low as a 1.8-V supply. The TRS3122E is capable of running at data rates up to 1000 kbps, while maintaining RS-232-compatible output levels.

The TRS3122E has a unique VL pin that allows operation in mixed-logic voltage systems. Both driver in (DIN) and receiver out (ROUT) logic levels are pin programmable through the VL pin. This eliminates the need for additional voltage level shifter while interfacing with low-voltage microcontrollers or UARTs.

Auto Powerdown Plus automatically places the device in a low power mode when the device has not received or transmitted data for more than 30 seconds. This feature makes this device a very attractive option for battery powered or other power-sensitive applications.
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Technical documentation

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Type Title Date
* Data sheet TRS3122E 1.8 V Low Power Dual RS-232 Transceiver datasheet (Rev. C) PDF | HTML 13 May 2016
Application note RS-232 Glossary and Selection Guide PDF | HTML 23 May 2023
User guide RS232 BoosterPack™ Getting Started Guide 08 Dec 2016
Application note Designing with the TRS3122E (Rev. A) 23 Jul 2016
EVM User's guide TRS3122EEVM User's Guide 16 Mar 2016

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

BOOSTXL-RS232 — TRS3122E: RS-232 transceiver BoosterPack™ Plug-in Module

The BOOSTXL-RS232 is a BoosterPack™ Plug-in Module for a TI LaunchPad™ Development Kit. The BOOSTXL-RS232 enables quick RS-232 prototyping with the TRS3122E, the industry’s first 1.8-V inductor-less low-power RS-232 transceiver. The board is equipped with a (...)

User guide: PDF
Not available on TI.com
Evaluation board

TRS3122EEVM — TRS3122E: 1.8V RS-232 Transceiver Evaluation Module

The TRS3122EEVM is an evaluation module for the TRS3122E, a 1.8V high-speed RS-232 transceiver. The module enables device evaluation using the installed DB-9 connector and terminal block. The board can be set in a loopback state for very simple evaluation or operated in tandem with diagnostic (...)
User guide: PDF
Not available on TI.com
Simulation model

TRS3122E IBIS Model

SLLM309.ZIP (102 KB) - IBIS Model
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Simulation tool

TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
User guide: PDF
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Reference designs

TIDA-01230 — Isolated RS-232 With Integrated Signal and Power Reference Design

The TIDA-01230 reference design provides a compact solution capable of generating isolated DC power while supporting isolated RS-232 communication. The design consists of a reinforced digital isolator with integrated power combined with an RS-232 communication transceiver.
Design guide: PDF
Schematic: PDF
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VQFN (RGE) 24 View options
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