LTC4257CS8-1#PBF

Power Over Ethernet (PoE) Controllers Overview

The LTC4257CS8-1#PBF is a Powered Device (PD) controller compliant with IEEE 802.3af standards, designed for Power over Ethernet applications. It integrates a power switch and control logic within an SOIC-8 surface-mount package. The device supports operation up to -57 V input voltage and includes current limiting capabilities. It features low quiescent supply current and operates across a specified temperature range, providing a compact solution for PoE endpoint integration.

Power Over Ethernet (PoE) Controllers Feature Summary

• Integrates IEEE 802.3af compliant powered device control logic with an internal power switch
• Supports high-voltage operation suitable for standard PoE classification levels
• Provides integrated current limiting and protection mechanisms for the load

Power Over Ethernet (PoE) Controllers Applications

• IEEE 802.3af Powered Device implementations
• Power over Ethernet endpoint circuits
• LAN interface power management modules

Power Over Ethernet (PoE) Controllers Procurement Notes

Verify component authenticity through authorized Analog Devices distributors or certified partners. Confirm the specific suffix matches the required package and tape-and-reel specifications. Request official datasheets and compliance documentation to ensure adherence to RoHS standards and environmental regulations prior to procurement.

Power Over Ethernet (PoE) Controllers Selection Notes

Select this component for designs requiring strict IEEE 802.3af compliance in a small form factor. Ensure the application voltage does not exceed the maximum rating of -57 V. Consider the SOIC-8 thermal performance and PCB layout requirements for optimal heat dissipation during continuous operation under full load conditions.

Power Over Ethernet (PoE) Controllers Part Context

This part belongs to the LTC4257 family of PoE controllers from Analog Devices. It serves as a complete solution for powering network devices via Ethernet cables. The CS8 variant denotes the commercial temperature grade and SOIC-8 packaging, distinguishing it from industrial or wider-package alternatives within the same functional series.

Power Over Ethernet (PoE) Controllers Replacement Considerations

Direct substitutes include other IEEE 802.3af PD controllers from Analog Devices such as the LTC4256 series or similar legacy parts. Verify pin compatibility and electrical parameters before substitution. No direct cross-manufacturer replacements are confirmed in public documentation.