world s most integrated 10/100 managed switch lowest cost solution for soho and entry-level corporate applications smallest form factor (reduces board space by 50%) scalable architecture supports 4 to 12 port densities fifth port supports any external ethernet mii transceiver eliminates cost of external led latches and drivers robust and field-proven digi- based 10/100 transceivers substantially simplifies board and system design integrated transceivers eliminate pin-intensive media independent interface (mii) internal pll generates all system clocks from a single 25 mhz source fully manageable with external cpu basic management statistics can be gathered and reported with only a very low-cost microcontroller BCM5304M 5-port managed 10/100base-t/tx switch 12-port managed switch using smp & 100 mb/s uplink interface summary of benefits led matrix 8 x rj-45 cpu 12 front panel ports led matrix 5304m quad magn. ssram 5308m quad magn. quad magn. ssram 4 x rj-45 5201 odl mii optional 2nd tx/fx uplink module tx/fx uplink port 5201 d mag mii 5-port 10/100 switch integrating the macs, switching fabric and 4 transceivers into a single chip supports full-wire speed, full-duplex traffic on every port simultaneously cascadable up to 12 ports, with a bcm5308m serial management port (smp) provided for cpu hardware support for snmp, rmon, and spanning tree on board 32/64-bit counters support popular mibs glueless interface to low-cost 256k bytes or 512k bytes ssram, configurable to use a single 64k x 32 device 5.2 gb/s memory bandwidth provided per device mii connection for external phy (fx or tx) 2.6 gb/s expansion port cascades up to 3 devices in a daisy-chain configuration flow control: full-duplex (802.3x) and half-duplex options supported direct led interface provides status on each port low-power 3.3v design in .35 cmos technology 352-pin tbga package BCM5304M features product brief BCM5304M
the broadcom BCM5304M is a five-port 10/100base-t/tx integrated switch targeted at cost-sensitive fast ethernet managed switch systems, soho routers and voip telephony systems. the device contains four 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 BCM5304M device provides a highly integrated solution. it combines all of the functions of a high-performance switch system including transceivers, media access controllers, address management, 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 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 BCM5304M is designed with broadcom s industry-proven, dsp-based 10/100 transceiver technology. the use of digital technology in the BCM5304M 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. BCM5304M overview mii mac interchip expansion port expansion i/f mib engine serial cpu port hdlc/smp i/f mdi mdi mdi mdi mac mac mac mac 10/100 phy 10/100 phy 10/100 phy 10/100 phy switch fabric dma interface arl led interface leds memory bus cascade interface 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 ? 1999 broadcom corporation BCM5304M.0pb8.30.99 broadcom and the broadcom logo are registered trademarks of broadcom corporation. 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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