KSZ8841-PMQLI-TR

Controllers Overview

The KSZ8841-PMQLI-TR is a single-port Fast Ethernet MAC controller with a 32-bit/33 MHz PCI interface, manufactured by Microchip Technology. It complies with IEEE 802.3u standards and supports 10BASE-T and 100BASE-TX speeds. The device integrates a PHY, MAC, and PCI bus interface in a 128-pin PQFP package. It operates on a single 3.3V supply with 5V tolerant I/O buffers and features an industrial temperature range of -40°C to +85°C. Internal memory includes 8 KB for RX/TX FIFO buffers. Key capabilities include Wake-on-LAN, LinkMD cable diagnostics, HP Auto MDI-X, and support for IEEE 802.1Q VLAN tagging.

Controllers Feature Summary

• Integrates a 32-bit/33 MHz PCI bus interface unit supporting both master and slave operations for efficient host processor data transfer.
• Includes advanced power management features such as port power-down, full-chip power-down, and Wake-on-LAN with Magic Packet support.
• Features integrated analog circuitry for physical layer transmission and reception, including adaptive equalization and baseline wander correction.
• Provides LinkMD cable diagnostic capabilities to determine cable length and identify open or short conditions without external tools.

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

Controllers Procurement Notes

Verify the specific suffix 'I' indicates the industrial temperature grade (-40°C to +85°C) compared to the commercial variant. Confirm the 'TR' suffix denotes tape and reel packaging. Ensure the source document matches the datasheet DS00003284A for accurate pinout and electrical specifications. Cross-reference the manufacturer part number with authorized distributors to confirm authenticity and current production status.

Controllers Selection Notes

Select this component when a single-port Fast Ethernet solution with a native PCI interface is required. It is suitable for embedded systems needing low latency and high throughput via DMA. Consider the industrial temperature rating if operating in harsh environments. Verify that the host system supports 32-bit PCI buses at 33 MHz. Evaluate power consumption requirements against the device's low-power CMOS design and available power-down modes.

Controllers Part Context

The KSZ8841-PMQLI-TR belongs to the KSZ8841 series of single-port Ethernet MAC controllers. The 'PMQL' designation typically refers to the PQFP-128 package with commercial temperature range, while 'PMQLI' specifies the industrial temperature extension. This series is designed for cost-effective integration of Fast Ethernet connectivity into embedded applications requiring direct CPU interfacing via PCI.

Controllers Replacement Considerations

The KSZ8841-PMQL is the commercial temperature version of this component. For non-PCI interfaces, consider the KSZ8841-16MVL-TR or KSZ8841-32M variants. The KSZ8842 is a two-port switch version within the same family. Verify pin compatibility and software register maps before substituting.