1894K-40LFT

Overview

The Renesas Electronics Corporation 1894K-40LFT is an Ethernet Physical Layer (PHY) controller belonging to the PHYceiver™ series. It supports 10/100 Base-T/TX standards and utilizes a parallel interface for connection with MAC controllers. The device operates within a supply voltage range of 3.14V to 3.47V and is housed in a 40-VFQFPN package with dimensions of 6x6 mm. It features a single transceiver and supports data rates of 10 Mb/s and 100 Mb/s. The component is rated for commercial operating temperatures between 0°C and 70°C.

Feature Summary

• Integrated 10/100 Base-T/TX physical layer transceiver
• Parallel interface compatibility for MAC connections
• Supports RMII protocol for reduced pin count

Applications

• Ethernet network interface design
• Industrial communication systems
• Consumer electronics networking modules

Procurement Notes

Verify the specific suffix 'LFT' against official Renesas documentation to confirm lead-free status and RoHS compliance, as datasheets may list variations. Confirm the package type is 40-VFQFPN rather than the 32-pin variant found in similar models like the 1894K-32LFT. Check for any Product Change Notifications (PCN) regarding assembly sites or material updates before finalizing procurement plans.

Selection Notes

Select this model when a 40-pin VFQFPN package is required for board space optimization compared to larger packages. Ensure the design supports the 3.14V to 3.47V supply voltage range. Verify that the host processor can interface via the parallel bus or RMII protocol supported by this PHY. Compare against the 1894KI-40LFT if industrial temperature ratings (-40°C to 85°C) are necessary instead of the commercial range.

Part Context

This component is part of the Renesas 1894K series of Ethernet PHY controllers. It shares functional similarities with the 1894K-32LFT but differs in package configuration and pin count. The series is designed for cost-effective integration of Ethernet connectivity into embedded systems requiring 10/100 Mbps speeds.

Replacement Considerations

The 1894KI-40LFT is a verified alternative offering an extended industrial temperature range (-40°C to 85°C) while maintaining the same 40-pin package and electrical characteristics.