TRSF3221ECDBRG4

Drivers, Receivers, Transceivers Overview

The TRSF3221ECDBRG4 is a single-channel RS-232 transceiver manufactured by Texas Instruments. It integrates one line driver, one line receiver, and a dual charge-pump circuit within a 16-pin SSOP package. The device operates from a single 3V to 5.5V supply voltage and supports data signaling rates up to 1Mbit/s. It features ±15kV IEC ESD protection on serial-port pins. Key electrical parameters include a typical supply current of 1mA in active mode and 1μA in shutdown. The driver output slew rate ranges from 24V/μs to 150V/μs. The component requires four external capacitors for the charge pump operation.

Drivers, Receivers, Transceivers Feature Summary

• Integrates ±15kV IEC ESD protection directly on RS-232 pins including ground.
• Features an auto-powerdown mechanism that disables drivers when no valid signal is detected.
• Supports flexible control inputs (FORCEON, FORCEOFF) for managing power states.
• Accepts 5V logic inputs while operating with a 3.3V supply.

Drivers, Receivers, Transceivers Applications

• Industrial PCs
• Wired networking equipment
• Data center and enterprise computing systems
• Battery-powered portable devices

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'G4' indicates RoHS compliance and green material status as per Texas Instruments standards. Confirm the SSOP-16 package dimensions match the design footprint requirements. Ensure the operating temperature range aligns with the system environment specifications before finalizing procurement orders.

Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring a single-channel RS-232 interface with integrated ESD protection. It is suitable for designs needing low standby current via auto-powerdown. Compare against the TRS3221E if a lower speed of 250kbit/s is sufficient. Verify capacitor values based on the specific VCC level used in the target circuit.

Drivers, Receivers, Transceivers Part Context

This part belongs to the TRSF3221E family of single-channel RS-232 transceivers. The 'C' suffix denotes a commercial temperature range of 0°C to 70°C. The 'DB' indicates the 16-pin SSOP package type. The 'R' typically signifies reel packaging, though local sources may vary. The 'G4' suffix confirms lead-free and RoHS compliant manufacturing.

Drivers, Receivers, Transceivers Replacement Considerations

The TRS3221E is a pin-compatible alternative offering a lower maximum data rate of 250kbit/s. Other variants in the series include TRSF3221EIDBR and TRSF3221EIRGTR, which differ in temperature range or package type. Verify functional equivalence regarding ESD protection levels and supply voltage requirements when substituting.

Drivers, Receivers, Transceivers FAQ

How does the auto-powerdown feature function?

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

What are the requirements for external capacitors?

Four external capacitors are required for the charge pump. For a 3.3V supply, use 0.1μF capacitors. For a 5V supply, use 0.047μF for C1 and 0.33μF for C2, C3, and C4.

What is the purpose of the INVALID output pin?

The INVALID output indicates the status of the receiver input. It goes high when a valid RS-232 signal is present and low if the input voltage remains between -0.3V and 0.3V for more than 30μs.