TRS3222CPWRG4

Drivers, Receivers, Transceivers Overview

The TRS3222CPWRG4 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 with a maximum driver output slew rate of 30 V/µs. The device integrates two drivers and two receivers, along 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 and features a power-down mode that reduces standby current to 1 µA typical.

Drivers, Receivers, Transceivers Feature Summary

• Provides ±15-kV ESD protection on serial-port connection pins including ground.
• Integrates a dual charge-pump circuit for operation from a single low-voltage supply.
• Features a dedicated power-down pin to minimize standby current consumption.
• 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 against the manufacturer's Package Option Addendum to confirm package type and environmental classification. Ensure the selected variant matches the required operating temperature range and RoHS compliance status for the intended design implementation.

Drivers, Receivers, Transceivers Selection Notes

Select this component when designing asynchronous communication interfaces requiring robust ESD protection and low-power operation. Consider the TRSF3222 if a higher data rate of 1 Mbit/s is required while maintaining pin compatibility. Verify that the application can accommodate the necessary external capacitor values for the internal charge pump.

Drivers, Receivers, Transceivers Part Context

This part belongs to the TRS3222 family of RS-232 transceivers designed for portable electronics. It serves as an electrical interface between an asynchronous communication controller and a serial-port connector. The device is functionally similar to other multichannel RS-232 solutions but is optimized for low-voltage, battery-operated environments.

Drivers, Receivers, Transceivers Replacement Considerations

TRSF3222

Drivers, Receivers, Transceivers FAQ

How does the device behave during power-down mode?

In power-down mode, the onboard charge pump is disabled, and the drivers enter a high-impedance state. However, the receivers remain active, allowing the device to monitor the bus while drawing only 1 µA of supply current.

What are the requirements for the external capacitors?

The device requires four small external capacitors to support the dual charge-pump circuit. Typical values include 0.1 µF for C1–C4 at 3.3 V or specific combinations like 0.047 µF for C1 and 0.33 µF for C2–C4 at 5 V.

Can the receiver outputs be disabled independently?

Yes, the receiver outputs can be placed in a high-impedance state by setting the EN (Enable) pin high, independent of the power-down control.