TRS3318IPWRG4

Drivers, Receivers, Transceivers Overview

The TRS3318IPWRG4 is a dual-driver, dual-receiver RS-232 transceiver designed for low-voltage operation. It operates from a single 2.25-V to 3-V supply and supports data rates up to 460 kbps. The device integrates a proprietary charge pump requiring only four 0.1-μF capacitors. Key electrical parameters include a typical operating supply current of 300 μA and a standby current of 1 μA with receivers active. It features ±15-kV HBM ESD protection on RS-232 I/O pins. The component is housed in a 20-pin TSSOP package and functions within an industrial temperature range of -40°C to +85°C.

Drivers, Receivers, Transceivers Feature Summary

• Integrated auto-powerdown plus feature reduces supply current to 1 μA when the serial port is disconnected or drivers are inactive for over 30 seconds.
• Robust electrostatic discharge (ESD) protection rated at ±15 kV Human-Body Model and ±8 kV IEC 61000-4-2 methods on all RS-232 lines.
• Proprietary low-dropout driver output stage enables full RS-232 compatibility using a dual charge pump powered by a single low-voltage supply.

Drivers, Receivers, Transceivers Applications

• Battery-powered portable systems
• Personal Digital Assistants (PDAs)
• Cellular phones
• Notebook computers
• Hand-held equipment

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'IPWRG4' against the manufacturer's latest Package Option Addendum to confirm status and packaging details. The 'I' suffix indicates the industrial temperature grade (-40°C to +85°C), while 'PW' denotes the TSSOP package. Confirm RoHS compliance and lead finish specifications directly from the official datasheet documentation before procurement.

Drivers, Receivers, Transceivers Selection Notes

Select this component for designs requiring low-voltage RS-232 communication with minimal power consumption. Ensure the system supply voltage remains within the 2.25-V to 3-V range. Verify that the application can accommodate the external 0.1-μF capacitors required for the charge pump. Consider the 20-pin TSSOP footprint constraints during PCB layout.

Drivers, Receivers, Transceivers Part Context

The TRS3318 series includes variants such as TRS3318CDB and TRS3318IDB. The IPWRG4 variant specifically utilizes the TSSOP-20 package and meets industrial temperature standards. Other family members may offer different package options like SSOP or varying temperature grades. The device is part of Texas Instruments' interface IC portfolio focused on low-power serial communication solutions.

Drivers, Receivers, Transceivers Replacement Considerations

Publicly confirmed substitute part numbers include MAX3318IPWR and MAX3318EIPWRG4. These components share identical pinouts and functional specifications. Verify that the replacement part number matches the required temperature grade and package type for direct interchangeability.

Drivers, Receivers, Transceivers FAQ

How does the auto-powerdown plus feature function?

The device enters a low-power mode reducing supply current to 1 μA if no valid signal transitions are detected on receiver or driver inputs for approximately 30 seconds. It automatically reactivates upon sensing a valid transition.

What is the purpose of the READY pin?

The READY pin asserts high when the negative charge pump voltage (V-) drops below -3.5 V, indicating that the internal charge pump is regulating and the device is ready to transmit data.

What external components are required for operation?

The device requires four 0.1-μF capacitors connected to the charge pump terminals (C1+, C1-, C2+, C2-) to generate the necessary positive and negative voltages for RS-232 signaling.