1894K-44LFT

Overview

The 1894K-44LFT is an Ethernet Physical Layer Controller manufactured by Renesas Electronics Corporation, 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 is housed in a 44-VFQFPN package measuring 7x7 mm with exposed pads. It operates on a single 3.3V power supply within a voltage range of 3.135V to 3.465V. The component functions reliably across an industrial temperature range from -40°C to +85°C. Key features include integrated auto-negotiation, full/half-duplex operation, and support for MII/RMII interfaces.

Feature Summary

• Integrated auto-negotiation capability for link partner detection
• Supports both full and half duplex transmission modes
• Compatible with standard MII and RMII MAC interfaces

Applications

• Industrial networking equipment requiring wide temperature tolerance
• Embedded systems utilizing 10/100 Mbps Ethernet connectivity
• Consumer electronics with standard Ethernet port requirements

Procurement Notes

Verify the specific suffix 'LFT' against official Renesas documentation to confirm lead-free status and RoHS compliance before procurement. Confirm package dimensions match the 44-VFQFPN (7x7mm) specification. Check current lifecycle status as distribution availability may vary. Ensure compatibility with existing board layout constraints regarding the exposed thermal pad design.

Selection Notes

Select this component when a robust PHY solution with integrated auto-negotiation is required for 10/100Base-T applications. The 44-pin VFQFPN package offers a compact footprint suitable for space-constrained designs. Consider the -40°C to +85°C operating range if the application involves industrial or harsh environments. Verify that the host system supports the parallel interface protocol utilized by this controller.

Part Context

This part belongs to the Renesas PHYceiver family of Ethernet physical layer transceivers. These components are designed to simplify Ethernet integration by combining PHY functionality with management capabilities. The 1894K series specifically targets cost-effective and high-volume applications requiring reliable 10/100 Mbps connectivity without external magnetics complexity.

Replacement Considerations

Consult official Renesas substitution guides for verified alternatives. Cross-reference pinouts and electrical characteristics carefully if considering legacy IDT variants. Ensure any substitute maintains the same 44-pin VFQFPN package and 3.3V operating voltage.