worlds most integrated 10/100 managed switch lowest cost solution for soho and entry-level corporate applications smallest form factor (reducing board space by 50%) fully manageable with external cpu ability to gather and support basic management statistics with only a very low-cost microcontroller scalable architecture that supports 8 to 24 port densities cost of external led latches and drivers eliminated robust and field-proven digi- -based 10/100 transceivers substantially simplified board and system design integrated transceivers, eliminating pin-intensive media independent interface (mii) internal pll, generating all system clocks from a single 25-mhz source BCM5308M 9-port managed 10/100base-t/tx switch 24-port fully managed cascadable switch summary of benefits product brief BCM5308M 5201 odl mii led matrix 8 x rj-45 cpu 24 front panel ports led matrix led matrix 5308m quad magn. quad magn. ssram 5308m quad magn. quad magn. ssram 5308m ssram 8 x rj-45 8 x rj-45 optional 2nd tx cascade i/f quad magn. quad magn. 5201 d mag mii optional tx cascade i/f 5201 d mag mii smp 9-port 10/100 switch integrating the macs, switching fabric and eight transceivers into a single chip support for full-wire speed, full-duplex traffic on every port simultaneously non-blocking and cascadable up to 24 ports on-board 32/64-bit counters support popular mibs serial management port (smp) provided for cpu hardware support for snmp, rmon, and spanning tree glueless interface to low-cost 512 kb or 1 mb ssram support for address learning and aging mii connection for external phy (fx or tx) 2.6-gbps expansion port that cascades up to three devices in a daisy-chain configuration support for up to 16k unicast mac addresses flow control: support for full-duplex (802.3x) and half-duplex options direct led interface to provide status on each port low-power, 3.3v design in 0.35 cmos technology 352-pin tbga package BCM5308M features
the broadcom BCM5308M is a 9-port 10/100base-t/tx integrated switch targeted at cost-sensitive fast ethernet managed switch systems. the device contains eight full-duplex 10base-t/100base-tx fast ethernet transceivers, each of which performs all of the physical layer interface functions for 10base-t ethernet on category 3, 4 or 5 unshielded twisted- pair (utp) cable and 100base-tx fast ethernet on category 5 utp cable. the BCM5308M device is a highly integrated solution. it combines all of the functions of a high-performance switch system including transceivers, media access controllers, address management, learning and aging mib statistic gathering/ reporting, 802.1d spanning tree protocol support, and a non- blocking switch controller into a single monolithic 0.35 cmos device. it also complies with the ieee 802.3, 802.3u, and 802.3x specifications, including the mac control pause frame and auto-negotiation subsections, providing compatibility with all industry-standard ethernet and fast ethernet devices. the BCM5308M is designed with broadcoms industry-proven, dsp-based 10/100 transceiver technology. the use of digital technology in the BCM5308M design results in robust performance over a broad range of operating conditions, and mitigates problems inherent to mixed-signal implementations, such as analog offset and on-chip noise. BCM5308M overview mdi mdi mdi mdi mdi mdi mdi mdi mii 10/100 phy mac mac mac mac mac mac mac mac mac 10/100 phy 10/100 phy 10/100 phy 10/100 phy 10/100 phy 10/100 phy 10/100 phy switch fabric dma interface arl led interface leds memory bus interchip expansion port expansion i/f mib engine serial cpu port hdlc/smp i/f mii i/f for more information please contact us at: phone: 949-450-8700, fax: 949-450-8710 email: info@broadcom.com visit our web site at: www.broadcom.com ? 2000 broadcom corporation 5308m-pb02-r-04.17.00 broadcom and the pulse logo are registered trademarks of broadcom corporation and/or its subsidiaries in the united states and certain other countries. digi- is a trademark of the broadcom corporation. broadcom corporation 16215 alton parkway, p.o. box 57013 irvine, california 92619-7013
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