LAN9512I-JZX

Controllers Overview

The LAN9512I-JZX is a high-performance Hi-Speed USB 2.0 hub integrated with a 10/100 Ethernet controller, manufactured by Microchip Technology. It features one upstream and two downstream USB ports with integrated PHYs, alongside an IEEE 802.3 compliant MAC and PHY. The device operates within an industrial temperature range of -40°C to +85°C and utilizes a 64-pin QFN package. Key electrical parameters include a single 25 MHz crystal requirement, internal 1.8V core supply regulator, external 3.3V I/O supply, and support for bus-powered or self-powered modes.

Controllers Feature Summary

• Integrated USB 2.0 hub with two downstream ports and one upstream port, supporting High-Speed, Full-Speed, and Low-Speed devices.
• Combined 10/100 Ethernet controller featuring full-duplex support, HP Auto-MDIX, and automatic polarity correction.
• Advanced power management capabilities including multiple suspend states and individual downstream port power control.
• Built-in EEPROM controller for loading static configuration data, USB descriptors, and MAC addresses upon reset.

Controllers Applications

• Desktop PCs
• Notebook PCs
• Printers
• Game Consoles
• Docking Stations

Controllers Procurement Notes

Verify the specific suffix 'I' confirms the industrial temperature grade (-40°C to +85°C) against the commercial variant. Confirm the 64-QFN package type matches the target PCB footprint. Ensure the design supports the required 3.3V I/O and 1.8V core voltage domains as specified in the datasheet power connections.

Controllers Selection Notes

Select this component when a combined USB hub and Ethernet solution is required for embedded systems or peripherals. The industrial temperature rating makes it suitable for harsh environments compared to commercial variants. Consider the integrated PHY and MAC to reduce bill of materials cost by eliminating separate controllers.

Controllers Part Context

This part belongs to the LAN9512 family, which includes the commercial grade LAN9512 and other variants like the LAN9514. The 'I' suffix specifically denotes the industrial temperature range extension. It serves as a bridge between USB host controllers and Ethernet networks, consolidating connectivity functions into a single chip.

Controllers Replacement Considerations

LAN9512-JZX (Commercial Temperature Range)

Controllers FAQ

What is the difference between the LAN9512 and LAN9512I?

The primary difference is the operating temperature range. The LAN9512I supports an industrial temperature range of -40°C to +85°C, whereas the standard LAN9512 typically supports a commercial range of 0°C to +70°C.

Does the LAN9512I require external components for the Ethernet PHY?

No, the device integrates the 10/100 Ethernet PHY. Minimal external components are required, primarily limited to the magnetics jack and bias resistors as specified in the reference schematic.

How does the device handle over-current conditions on USB ports?

The device uses PRTCTL pins to interface with external USB power switches or poly fuses. It monitors these pins to detect over-current conditions and can disable port power accordingly.