KSZ8841-PMQLI

Controllers Overview

The KSZ8841-PMQLI is a single-port Fast Ethernet MAC controller featuring a 32-bit/33 MHz PCI processor interface. It integrates a 10/100BASE-T/TX physical layer transceiver compliant with IEEE 802.3u standards, supporting auto-negotiation for full- and half-duplex modes. The device utilizes a low-power CMOS process with a single 3.3V power supply and 5V tolerant I/O buffers. It includes an 8 KB internal memory buffer for RX/TX FIFO operations and supports Wake-on-LAN functionality via Magic Packet technology. The component operates within an industrial temperature range of –40°C to +85°C and is housed in a 128-pin PQFP package.

Controllers Feature Summary

• Supports IEEE 802.3x full-duplex flow control and half-duplex backpressure collision flow control.
• Includes Microchip LinkMD cable diagnostic capabilities to determine cable length and diagnose faults.
• Features dynamic buffer memory schemes suitable for video-over-IP applications requiring minimal image jitter.
• Integrates HP Auto MDI-X crossover capability with disable/enable options.

Controllers Applications

• Video Distribution Systems
• High-End Cable, Satellite, and IP Set-Top Boxes
• Video over IP
• Voice over IP (VoIP) and Analog Telephone Adapters (ATA)

Controllers Procurement Notes

Verify the specific ordering suffix 'I' confirms the industrial temperature grade (-40°C to +85°C). Confirm the package type matches the 128-pin PQFP requirement. Ensure the host system supports the 32-bit/33 MHz PCI interface protocol. Check for any required external components such as the serial EEPROM or isolation transformers listed in the datasheet.

Controllers Selection Notes

Select this model when a dedicated PCI interface is required for the host processor connection. Choose the industrial grade variant if operation outside commercial temperatures is necessary. Consider the non-PCI versions if the target system lacks a PCI bus. Verify that the 8 KB internal buffer meets the latency requirements for the intended data throughput.

Controllers Part Context

This component belongs to the KSZ8841 series of single-port Ethernet MAC controllers. The PMQL designation indicates the PCI interface variant, while the 'I' suffix denotes the industrial temperature rating. It serves as a mixed-signal analog/digital device designed for embedded network applications requiring efficient power consumption and integrated PHY capabilities.

Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult Microchip Technology for current equivalent listings or updated product line replacements.