TRS3223CDB

Drivers, Receivers, Transceivers Overview

The TRS3223CDB 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 features ±15-kV ESD protection on bus pins, exceeding Human Body Model standards. The component meets TIA/EIA-232-F and ITU v.28 requirements. It includes auto-powerdown functionality that reduces standby current to 1 µA typical when no valid signal is detected. The package is a 20-pin SSOP.

Drivers, Receivers, Transceivers Feature Summary

• Provides ±15-kV IEC ESD protection on serial-port connection pins including ground.
• Integrates auto-powerdown logic to minimize power consumption during inactivity.
• 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
• Personal Digital Assistants (PDAs)
• Notebooks and laptops
• Palmtop PCs
• Hand-held equipment

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'CDB' confirms the commercial temperature range of 0°C to 70°C and the SSOP-20 package type. Confirm RoHS compliance status as defined in the Package Option Addendum. Ensure design compatibility with the required four external capacitor values for the charge pump circuit at the target supply voltage.

Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring low standby current and robust ESD protection on serial interfaces. Compare against the high-speed alternative TRSF3223 if data rates exceeding 250 kbit/s are necessary. Verify that the 20-pin SSOP footprint fits the PCB layout constraints. Ensure the system logic levels match the specified input voltage thresholds for reliable operation.

Drivers, Receivers, Transceivers Part Context

The TRS3223 series consists of multichannel RS-232 transceivers designed for portable electronics. The 'C' suffix denotes the commercial temperature grade, while 'I' indicates industrial grade. The 'DB' suffix specifies the plastic small-outline package. This part serves as a bridge between asynchronous communication controllers and serial port connectors.

Drivers, Receivers, Transceivers Replacement Considerations

TRSF3223: Pin-compatible high-speed alternative supporting 1 Mbit/s data rates.

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 sensed at the receiver inputs.

What is the purpose of the INVALID output?

The INVALID output goes high to notify the user if a valid RS-232 signal is present at any receiver input, indicating voltages greater than 2.7 V or less than -2.7 V.

Does the device support 5-V logic with a 3.3-V supply?

Yes, the TRS3223 accepts 5-V logic inputs even when operating with a 3.3-V VCC supply.