TRS3223EIDWR

Drivers, Receivers, Transceivers Overview

The TRS3223EIDWR 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 provides two drivers and two receivers with ±15-kV ESD protection on RS-232 bus pins. The device meets TIA/EIA-232-F and ITU v.28 standards, supporting data rates up to 500 kbit/s with a maximum slew rate of 30 V/µs. It utilizes four external 0.1-µF capacitors for charge pump operation. The component features an auto-powerdown mode that reduces standby current to 1 µA when the serial port is inactive. It is housed in a 20-pin SOIC (DW) package and supports an operating temperature range of -40°C to 85°C.

Drivers, Receivers, Transceivers Feature Summary

• Provides ±15-kV IEC ESD protection on RS-232 bus pins including ground.
• Features flexible power management with auto-powerdown functionality to minimize standby current.
• Accepts 5-V logic inputs while operating with a 3.3-V supply voltage.

Drivers, Receivers, Transceivers Applications

• Battery-powered systems
• Personal digital assistants (PDAs)
• Notebooks and laptops
• Palmtop PCs
• Hand-held equipment

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'I' confirms the industrial temperature range (-40°C to 85°C) and 'W' indicates the SOIC package. Confirm RoHS compliance status as the datasheet lists this part as obsolete in some regions; check for active alternatives like the TRS3223EIPWR if new designs are required. Ensure the source document matches the SLLS794 revision for accurate electrical characteristics.

Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring dual-channel RS-232 communication with low standby power consumption. The device is suitable for systems needing ±15-kV ESD protection without external protection circuits. Consider the 500 kbit/s data rate limit when designing high-speed interfaces. Verify capacitor values match the supply voltage requirements specified in the application information section.

Drivers, Receivers, Transceivers Part Context

The TRS3223E series belongs to Texas Instruments' family of 3-V to 5.5-V multichannel RS-232 transceivers. This specific part number represents the industrial temperature variant in a 20-pin SOIC package. It shares pin compatibility with other devices in the TRS32xxE family, allowing for design flexibility across different channel counts and speed grades within the same ecosystem.

Drivers, Receivers, Transceivers Replacement Considerations

Public confirmed substitute: TRS3223EIPWR (TSSOP package, same electrical specs). Note: The datasheet lists TRS3223EIDWR as obsolete; verify availability or consider the pin-compatible TRSF3223E for 1 Mbit/s operation if higher speed is needed.

Drivers, Receivers, Transceivers FAQ

How does the auto-powerdown feature function?

Auto-powerdown disables the driver outputs and reduces supply current to 1 µA when FORCEON is low and FORCEOFF is high, provided no valid RS-232 signal is detected at the receiver input.

What is the purpose of the INVALID output pin?

The INVALID output notifies the user if an RS-232 signal is present. It goes high 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.

What external components are required for operation?

The device requires four small external capacitors (typically 0.1 µF) connected to the charge pump circuit to generate the positive and negative voltages needed for RS-232 signaling.