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KS8997 from MICREL

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KS8997

Manufacturer: MICREL, KENDIN

8-Port 10/100 Integrated Switch with PHY and Frame Buffer

Partnumber Manufacturer Quantity Availability
KS8997 MICREL, KENDIN 99 In Stock

Description and Introduction

8-Port 10/100 Integrated Switch with PHY and Frame Buffer The KS8997 is a highly integrated 5-port 10/100 managed switch IC manufactured by Kendin. It features an embedded 8051 microcontroller for management functions and supports advanced features such as VLAN, QoS, and port mirroring. The device operates with a 3.3V power supply and includes five 10/100 Ethernet PHYs with auto-negotiation and auto-MDI/X support. It also provides MII/RMII interfaces for uplink connectivity. The KS8997 is designed for use in small office/home office (SOHO) networking equipment and enterprise switches.  

Key specifications:  
- **Ports:** 5 (10/100 Mbps)  
- **Interface:** MII/RMII for uplink  
- **Management:** Embedded 8051 microcontroller  
- **Features:** VLAN, QoS, port mirroring, auto-negotiation, auto-MDI/X  
- **Power Supply:** 3.3V  
- **Package:** 128-pin PQFP  

Descriptions and Features:  
- Integrated Layer 2 switching with MAC address learning  
- Supports IEEE 802.3x flow control  
- Jumbo frame support (up to 10KB)  
- Per-port bandwidth control  
- Broadcast storm protection  
- Energy-efficient Ethernet (EEE) support  
- LED indicators for link/activity/speed  

The KS8997 is commonly used in managed Ethernet switches, routers, and other networking devices requiring compact, low-power switching solutions.

Application Scenarios & Design Considerations

8-Port 10/100 Integrated Switch with PHY and Frame Buffer

Alternative Part Number

  • RTL8309N --: 9-port 10/100 Ethernet switch controller with similar integrated MAC/PHY functionality, widely used as a drop-in class replacement for the KS8997 in unmanaged switch designs.
  • KSZ8895 --: 5-port integrated 10/100 switch with comparable feature set and register-level compatibility from the same vendor family lineage, offering a straightforward migration path.
  • BCM5325 --: Mature 5-port 10/100 Ethernet switch SoC with similar port count and integrated PHYs, commonly used as an alternative in cost-sensitive unmanaged switch applications.

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