KSZ8895FMQ

Controllers Overview

The KSZ8895FMQ is a Layer 2 managed, five-port Ethernet switch integrated with three 10/100Base-T/TX transceivers on Ports 1, 2, and 5, and two 100Base-FX transceivers on Ports 3 and 4. It features one SW5-MII and one P5-MII interface for CPU connectivity. The device utilizes a shared memory-based non-blocking switch fabric with 1.4Gbps bandwidth and includes an on-chip 64Kbyte frame buffer. It operates within the commercial temperature range of 0°C to +70°C and is housed in a 128-pin PQFP package.

Controllers Feature Summary

• Supports IEEE 802.1q VLAN groups and IEEE 802.1d RSTP for network segmentation and loop prevention.
• Provides comprehensive QoS prioritization through programmable rate limiting, broadcast storm protection, and per-port filtering.
• Enables flexible management via SPI, I2C master, SMI, and MIIM interfaces alongside hardware strap-in options.

Controllers Applications

• VoIP phone systems
• Set-top boxes and game consoles
• Industrial control networks
• IPTV platforms
• Broadband gateways and firewalls

Controllers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm the exact temperature grade and lead-free status. Ensure that the selected variant matches the required operating environment specifications before finalizing procurement orders.

Controllers Selection Notes

Select this component when a mixed copper and fiber port configuration is required for cost-sensitive applications. Verify that the system design accommodates the 128-pin PQFP footprint and supports the necessary MII interface connections for the fifth port.

Controllers Part Context

This part belongs to the KSZ8895 family, which also includes variants with all-copper ports or reduced copper port counts. The FMQ designation specifically identifies the model equipped with dual 100Base-FX fiber ports, distinguishing it from the MQ and RQ series.

Controllers Replacement Considerations

The KSZ8895FMQI serves as the industrial temperature rated replacement for this commercial grade component. Both parts share identical pinouts and functional specifications while differing only in their specified operating temperature ranges.

Controllers FAQ

What are the physical layer configurations for the five ports?

Ports 1, 2, and 5 utilize 10/100Base-T/TX transceivers, while Ports 3 and 4 are equipped with 100Base-FX transceivers.

How does the device handle packet prioritization?

It supports per-port, 802.1p, and DiffServ-based prioritization with selectable 1, 2, or 4 queue configurations and programmable weighted fair queuing.

Which management interfaces are supported?

The chip supports Serial Management Interface (SMI), MII Management Interface (MIIM), high-speed SPI, and I2C master interfaces for register access.