TRS3223IDWG4

Drivers, Receivers, Transceivers Overview

The TRS3223IDWG4 is a multichannel RS-232 line driver and receiver manufactured by Texas Instruments. It operates from a single 3-V to 5.5-V supply and supports data signaling rates up to 250 kbit/s. The device integrates two drivers and two receivers with a dual charge-pump circuit requiring four external capacitors. It provides ±15-kV ESD protection on bus pins using the human-body model. The component meets TIA/EIA-232-F and ITU v.28 standards, features low standby current of 1 μA typical, and includes auto-powerdown functionality for power management.

Drivers, Receivers, Transceivers Feature Summary

• Provides ±15-kV ESD protection on serial-port connection pins including ground.
• Integrates auto-powerdown mode that disables outputs when no valid signal is detected.
• Includes an INVALID output pin to indicate the presence of valid RS-232 signals.
• Accepts 5-V logic inputs while operating with a 3.3-V supply.

Drivers, Receivers, Transceivers Applications

• Battery-powered systems
• PDAs
• Notebooks
• Laptops
• Palmtop PCs

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix against the manufacturer's Package Option Addendum to confirm package type and thermal characteristics. Confirm RoHS compliance status and lead finish details directly from the official datasheet or distributor documentation before finalizing procurement specifications.

Drivers, Receivers, Transceivers Selection Notes

Select this component for designs requiring RS-232 communication with integrated ESD protection and low standby current. Ensure the application environment falls within the -40°C to 85°C industrial temperature range. Verify that the system voltage remains between 3 V and 5.5 V and that sufficient board space is available for the required external capacitors.

Drivers, Receivers, Transceivers Part Context

This part belongs to the TRS3223 family of multichannel RS-232 transceivers. It serves as a functional alternative to high-speed pin-compatible devices such as the TRSF3223. The IDWG4 designation indicates an industrial temperature grade variant housed in a 20-pin SOIC (DW) package.

Drivers, Receivers, Transceivers Replacement Considerations

The TRSF3223 is documented as an alternative high-speed pin-compatible device offering 1 Mbit/s operation. Other variants within the TRS3223 series may be considered if different packaging options or commercial temperature ranges are required.

Drivers, Receivers, Transceivers FAQ

How does the auto-powerdown feature function?

Auto-powerdown occurs when FORCEON is low and FORCEOFF is high. If no valid RS-232 signal is sensed, the driver outputs are disabled, reducing supply current to 1 μA. The device activates automatically upon detecting a valid signal at any receiver input.

What is the purpose of the INVALID output?

The INVALID output notifies the user if an RS-232 signal is present. It goes high if any receiver input voltage exceeds 2.7 V or drops below -2.7 V, or if the signal stays within the indeterminate region for less than 30 μs.

What external components are required for operation?

The device requires four small external capacitors to support the dual charge-pump circuit. Typical values are 0.1 μF for 3.3-V supplies and 0.047 μF combined with 0.33 μF capacitors for 5-V supplies.