TPS2377DR-1G4

Overview

The TPS2377DR-1G4 is an IEEE 802.3af PoE Powered Device controller manufactured by Texas Instruments in a SOIC-8 package. It integrates a low-side switch with a maximum on-resistance of 1 Ohm and a current limit of 405 mA. The device operates within a supply voltage range of 0 V to 57 V and supports output power up to 12.95 W. It functions across a temperature range of -40°C to +85°C with a typical operating supply current of 240 µA.

Feature Summary

• Fully supports the IEEE 802.3af specification for Power over Ethernet applications
• Integrates a low-side switch rated for 100 V with auto-retry functionality
• Designed specifically for Powered Device (PD) control in LAN environments

Applications

• VoIP Phones
• WLAN Access Points
• Security Cameras

Procurement Notes

Verify the specific suffix '1G4' against the manufacturer's official documentation, as standard listings often reference the base TPS2377DR. Confirm RoHS compliance status directly from the datasheet. Ensure the SOIC-8 package matches your PCB footprint requirements. Cross-reference the part number with authorized distributors to confirm current availability and authenticity before finalizing procurement plans.

Selection Notes

Select this component for designs requiring strict adherence to the IEEE 802.3af standard. The integrated switch simplifies bill of materials by reducing external components. Consider the 405 mA current limit when sizing downstream loads. The wide input voltage range accommodates various PoE power sourcing equipment variations without additional regulation circuitry.

Part Context

This part belongs to the TPS237x family of IEEE 802.3af PoE Powered Device controllers. These devices are engineered to manage power delivery and detection in networked endpoints. The series provides a compact solution for integrating PoE capabilities into existing LAN infrastructure devices without complex external control logic.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.