MAX5940AESA+

Description：IC POE CNTRL 1 CHANNEL 8SOIC
Series：-
Mfr：Analog Devices Inc./Maxim Integrated
Package：Tube

SKU:712f82abe28b Category: Power Over Ethernet (PoE) Controllers Brand: Analog Devices Inc./Maxim Integrated

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Product introduction

Product Detailed Parameters

Description：IC POE CNTRL 1 CHANNEL 8SOIC
Series：-
Mfr：Analog Devices Inc./Maxim Integrated
Package：Tube
Type：Controller (PD)
Number of Channels：1
Power - Max：12.95 W
Internal Switch(s)：Yes
Auxiliary Sense：No
Standards：802.3af (PoE)
Voltage - Supply：36.6V ~ 67V
Current - Supply：400µA
Operating Temperature：-40°C ~ 85°C
Mounting Type：Surface Mount
Package / Case：8-SOIC (0.154", 3.90mm Width)
Supplier Device Package：8-SOIC

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MAX5940AESA+

Overview

The MAX5940AESA+ is an IEEE 802.3af-compliant Powered Device (PD) interface controller designed for Power-over-Ethernet applications. It operates within a supply voltage range of 30 V to 67 V and supports a maximum power dissipation of 470 mW. The device functions across an extended temperature range from -40°C to +85°C, drawing a typical operating current of 400 uA. Packaged in an 8-pin SOIC-Narrow (SOIC-8) surface-mount format, it integrates essential control logic for PD classification and management.

Feature Summary

Complies with IEEE 802.3af standards for Powered Device interface control
Integrates classification logic for power source negotiation
Supports wide input voltage operation suitable for PoE systems

Applications

IEEE 802.3af Powered Device implementation
Power-over-Ethernet network endpoint controllers
VoIP phone power management circuits

Procurement Notes

Verify component authenticity through authorized Analog Devices channels due to limited availability status. Confirm package marking and datasheet revision alignment during procurement. Check for obsolescence notifications as distribution may be restricted or limited. Ensure storage conditions meet manufacturer specifications for lead-free soldering processes.

Selection Notes

Select this controller when designing IEEE 802.3af compliant Powered Devices requiring external switching regulation. The SOIC-8 package suits space-constrained PCB layouts. Verify that the external switch and bias circuitry support the 30 V to 67 V operating range. Consider thermal dissipation limits of 470 mW for high-power PoE implementations.

Part Context

Part of the MAX5940 series focusing on PoE interface control. Distinguished by the ESA suffix indicating SOIC-8 narrow package and tube packaging. Related variants include tape-and-reel options like MAX5940DESA+T. The component serves as a core interface between Ethernet lines and local DC-DC converters.