TRSF3238E

ACTIVE

3-V to 5.5-V Multichannel RS-232 Line Driver/Receiver With ±15-kV ESD (HBM) Protection

Top

Product details

Parameters

Drivers per package 5 Receivers per package 3 Logic voltage (Min) (V) 3.3 Data rate (Max) (kbps) 1000 Main supply voltage (Nom) (V) 3.3, 5 Features Auto-Powerdown Plus ESD HBM (kV) 15 Rating Catalog Operating temperature range (C) -40 to 85, 0 to 70 open-in-new Find other RS-232 transceivers

Package | Pins | Size

SOIC (DW) 28 184 mm² 17.9 x 10.3 SSOP (DB) 28 54 mm² 5.3 x 10.2 open-in-new Find other RS-232 transceivers

Features

  • RS-232 Bus-Pin ESD Protection Exceeds ±15 kV Using Human-Body Model (HBM)
  • Meets or Exceeds the Requirements of TIA/EIA-232-F and ITU v.28 Standards
  • Operates With 3-V to 5.5-V VCC Supply
  • Operates up to 1000 kbit/s
  • Five Drivers and Three Receivers
  • Auto-Powerdown Plus Feature Enables Flexible Power-Down Mode
  • Low Standby Current . . . 1 µA Typical
  • External Capacitors . . . 4 × 0.1 µF
  • Accept 5-V Logic Input With 3.3-V Supply
  • Always-Active Noninverting Receiver Output (ROUT1B)
  • ESD Protection for RS-232 Interface Pins
    • ±15-kV Human-Body Model (HBM)
    • ±8-kV IEC61000-4-2, Contact Discharge
    • ±15-kV IEC61000-4-2, Air-Gap Discharge
  • APPLICATIONS
    • Battery-Powered Systems
    • PDAs
    • Notebooks
    • Subnotebooks
    • Laptops
    • Palmtop PCs
    • Hand-Held Equipment
    • Modems
    • Printers

open-in-new Find other RS-232 transceivers

Description

The TRSF3238E consists of five line drivers, three line receivers, and a dual charge-pump circuit with ±15-kV ESD (HBM) protection on the driver output (DOUT) and receiver input (RIN) terminals. The device meets the requirements of TIA/EIA-232-F and provides the electrical interface between notebook and subnotebook computer applications. The charge pump and four small external capacitors allow operation from a single 3-V to 5.5-V supply. In addition, the device includes an always-active noninverting output (ROUT1B), which allows applications using the ring indicator to transmit data while the device is powered down. The TRSF3238E operates at data signaling rates up to 1000 kbit/s.

Flexible control options for power management are featured when the serial port and driver inputs are inactive. The auto-powerdown plus feature functions when FORCEON is low and FORCEOFF is high. During this mode of operation, if the device does not sense valid signal transitions on all receiver and driver inputs for approximately 30 s, the built-in charge pump and drivers are powered down, reducing the supply current to 1 µA. By disconnecting the serial port or placing the peripheral drivers off, auto-powerdown plus occurs if there is no activity in the logic levels for the driver inputs. Auto-powerdown plus can be disabled when FORCEON and FORCEOFF are high. With auto-powerdown plus enabled, the device activates automatically when a valid signal is applied to any receiver or driver 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 all receiver input voltages are between -0.3 V and 0.3 V for more than 30 µs.

open-in-new Find other RS-232 transceivers
Download

Technical documentation

= Featured
No results found. Please clear your search and try again. View all 2
Type Title Date
* Data sheet 3-V to 5.5-V Multichannel RS-232 Line Driver/Receiver datasheet Aug. 15, 2007
More literature RS-232 IEC ESD-Protected Devices From TI (Rev. A) Jul. 27, 2007

Design & development

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

Design tools & simulation

SIMULATION TOOLS Download
SPICE-based analog simulation program
TINA-TI 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 (...)
document-generic User guide

Reference designs

REFERENCE DESIGNS Download
RS-232 Modem Interface Module for Protection Relay, IED, and Substation Automation Reference Design
TIDA-00557 The TIDA-00557 reference design provides an interface for a true RS-232 (eight signal + ground) physical layer interface for data terminal equipment (DTE) using a DB-9 plug-type connector with a provision for a data communication equipment (DCE) interface. This is intended for smart grid (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SOIC (DW) 28 View options
SSOP (DB) 28 View options

Ordering & quality

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos

Related videos