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Product details

Parameters

Drivers per package 2 Receivers per package 2 Logic voltage (Min) (V) 2.5 Data rate (Max) (kbps) 460 Main supply voltage (Nom) (V) 2.5 Features Auto-Powerdown Plus ESD HBM (kV) 15 Rating Catalog Operating temperature range (C) 0 to 70, -40 to 85 open-in-new Find other RS-232 transceivers

Package | Pins | Size

SSOP (DB) 20 38 mm² 5.3 x 7.2 TSSOP (PW) 20 42 mm² 6.5 x 6.4 open-in-new Find other RS-232 transceivers

Features

  • ESD Protection for RS-232 I/O Pins
    • ±15 kV (Human-Body Model)
    • ±8 kV (IEC 61000-4-2, Contact Discharge)
    • ±15 kV (IEC 61000-4-2, Air-Gap Discharge)
  • 300-µA Operating Supply Current
  • 1-µA Low-Power Standby Mode (With Receivers Active)
  • Designed to Transmit at a Data Rate of
    460 kbps
  • Auto-Powerdown Plus Option Features Flexible Power-Saving Mode
  • Operates From a Single 2.25-V to 3-V VCC Supply
  • Designed to be Interchangeable With Industry Standard '3318 Devices
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Description

The TRS3318E is a dual-driver, dual-receiver, RS-232-compatible transceiver. The device features auto-powerdown plus and enhanced electrostatic discharge (ESD) protection integrated into the chip. Driver output and receiver input 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 (HBM).

The device operates at a data rate of 460 kbps. The transceiver has a proprietary low-dropout driver output stage, enabling RS-232-compatible operation from a 2.25-V to 3-V supply with a dual charge pump. The charge pump requires only four 0.1-µF capacitors and features a logic-level output (READY) that asserts when the charge pump is regulating and the device is ready to begin transmitting.

The TRS3318E achieves a 1-µA supply current using the auto-powerdown feature. This device automatically enters a low-power power-down mode when the RS-232 cable is disconnected or the drivers of the connected peripherals are inactive for more than 30 s. The device turns on again when it senses a valid transition at any driver or receiver input. Auto-powerdown saves power without changes to the existing BIOS or operating system.

This device is available in two space-saving packages: 20-pin SSOP and 20-pin TSSOP.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 5
Type Title Date
* Datasheet TRS3318E 2.5-V 460-kbps RS-232 Transceiver With +/-15-kV ESD Protection datasheet (Rev. B) Oct. 11, 2013
Technical articles How the RS-232 transceiver’s regulated charge-pump circuitry works Jun. 28, 2018
Application note Understanding Power Requirements in RS-232 Applications (Rev. B) Apr. 26, 2013
Application note Removing Ground Noise in Data Transmission Systems Oct. 05, 2007
Application note Interface Circuits for TIA/EIA-232-F (Rev. A) Sep. 19, 2002

Design & development

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Design tools & simulation

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Reference designs

REFERENCE DESIGNS Download
Reference Design for Converting RS-232 Signaling to RS-485 Signaling
TIDA-060008 — This reference design provides a circuit of converting RS-232 signaling to RS-485 signaling. This allows for long-distance communication, since the range supported by RS-232 is normally less than 50 feet while the range for RS-485's can exceed 1000 feet. The design implements bidirectional (...)
document-generic Schematic
REFERENCE DESIGNS Download
RS-485 / RS-232 Multiprotocol Transceiver Reference Design
TIDA-00540 This design (TIDA-00540) allows for communication over RS-485 or RS-232 data buses without requiring separate wiring for each.  Data lines are shared between two different transceiver types, and a single control signal is used to determine which protocol is to be used.
document-generic Schematic

CAD/CAE symbols

Package Pins Download
SSOP (DB) 20 View options
TSSOP (PW) 20 View options

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