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Product Detailed Parameters
- Description：OCTAL ETHERNET PORT 802.3BT 2-PA
- Series：-
- Mfr：Skyworks Solutions Inc.
- Package：Tape & Reel (TR)
- Type：Controller (PSE)
- Number of Channels：8
- Power - Max：30 W
- Internal Switch(s)：Both
- Auxiliary Sense：No
- Standards：802.3at (PoE+), 802.3af (PoE), 802.3bt
- Voltage - Supply：3V ~ 3.6V
- Current - Supply：17mA
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：56-VFQFN Exposed Pad
- Supplier Device Package：56-QFN (8x8)
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Overview
The SI3473A-A01-IMR is a Power Sourcing Equipment (PSE) controller manufactured by Skyworks Solutions. It supports the IEEE 802.3bt standard and provides power over four Ethernet ports. The device delivers up to 90 W per port using four pairs of wires. It utilizes an industry-standard 255 mΩ current sense resistor for precise power management. The component operates within a temperature range of -40°C to +85°C and is housed in a QFN-56 package suitable for surface mount technology.
Feature Summary
- Supports IEEE 802.3bt Type 4 PSE classification with up to 90 W output per port
- Integrates flash memory to eliminate external BOM costs and reduce PCB space
- Features compact packaging design for high-density applications
Applications
- PoE Network Video Recorders
- Set-top boxes and gateways
- Network lighting control systems
Procurement Notes
Verify the specific suffix IMR indicates the reel packaging configuration when sourcing components. Confirm that the device meets the required environmental operating temperatures for the intended deployment environment. Ensure compatibility with the selected current sense resistors for optimal thermal performance.
Selection Notes
Select this component for designs requiring multi-port PoE++ integration with reduced bill of materials. The integrated flash feature simplifies firmware updates and reduces external storage requirements. Consider the thermal characteristics associated with the 255 mΩ sense resistor option for high-power density layouts.
Part Context
This part belongs to the Si347x family of PoE controllers from Skyworks Solutions. The family includes single, quad, and octal port variants designed to simplify the addition of compatible PoE to Ethernet ports. These devices offer a balance of thermal performance and cost efficiency through integrated solutions.
Replacement Considerations
The SI3474A-A01-IMR is a related quad-port variant within the same product family. Verify pinout and functional equivalence before substituting models to ensure system compatibility.
