KS8997/KSZ8997 8-Port 10/100 Integrated Switch with PHY and Frame Buffer Rev 1.1 On the media side, the KS8997 supports 10BaseT General Description and 100BaseTX through auto-negotiation as specified The KS8997 contains eight 10/100 physical layer by the IEEE 802.3 committee. transceivers, eight MAC (Media Access Control) units Physical signal transmission and reception are with an integrated layer 2 switch. The device runs as enhanced through use of analog circuitry that makes an eight port integrated switch. the design more efficient and allows for lower power The KS8997 is designed to reside in an unmanaged consumption and smaller chip die size. design not requiring processor intervention. This is Data sheets and support documentation can be found achieved through I/O strapping or EEPROM on Micrels web site at www.micrel.com. programming at system reset time. Functional Diagram Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. KS8997/KSZ8997 Features Applications 8-port 10/100 integrated switch with 8 physical Small workgroup switches layer transceivers VoIP infrastructure switches 32Kx32 of SRAM on chip for frame buffering Ordering Information 2.0Gbps high performance memory bandwidth 10BaseT and 100BaseTX modes of operation Part Number Temp. Range Package Superior analog technology for reduced power and KS8997 0C to +70C 128-Pin PQFP die size KSZ8997 0C to +70C 128-Pin PQFP Single 2.0V power supply with options for 2.5V and 3.3V I/O 900mA (1.80 W) including physical transmit drivers Supports port based VLAN Supports DiffServ priority, 802.1p based priority or port based priority Indicators for link, activity, full/half-duplex and speed Unmanaged operation via strapping or EEPROM at system reset time Hardware based 10/100, full/half, flow control and auto negotiation Wire speed reception and transmission Integrated address look-up engine, supports 1K absolute MAC addresses Automatic address learning, address aging and address migration Broadcast storm protection Full-duplex IEEE 802.3x flow control Half-duplex back pressure flow control Comprehensive LED support Supports MDI/MDI-X auto crossover Commercial temperature range: 0C to +70C Supports lead free product (KSZ8997) for commercial temperature range: 0C to +70C Available in 128-pin PQFP package February 2007 2 M9999-022807-1.1