finisar ? finisar corporation page 1 rev a, feb 2003 product specification 1000base-t copper gbic transceivers fcm-8520/8521-3 product features ? up to 1.25gb/s bi-directional data links ? extended operating temperature range (0c to +75c) ? hot-pluggable ? fully metallic enclosure for low emi ? low power (1.5w typical) ? access to physical layer ic via 2- wire serial bus applications ? 1.25 gigabit ethernet over cat 5 cable finisar?s fcm-8520/8521-3 1000base-t copper gbic transceivers are based on the gbic specification revision 5.5 1 . they are compatible with the gigabit ethernet and 1000base-t standards as specified in ieee std 802.3z 2 and ieee std 802.3ab 3 . the FCM-8520-3 uses the gbic?s rx_los pin for link indication, and 1000base-x auto-negotiation must be disabled on the host system. the fcm-8521-3 is compatible with 1000base-x auto-negotiation, but does not have a link indication feature (rx_los is internally grounded). see an-2032, ?commonly asked questions regarding auto-negotiation on finisar?s 1000base-t gbics? 4 , for a more complete explanation on the differences between the two models. product selection part number link indicator on rx_los pin compatible with 1000base-x auto-negotiation FCM-8520-3 yes no fcm-8521-3 no yes
fcm-8520/8521-3 1000base-t gbic product specification finisar ? finisar corporation page 2 rev a, feb 2003 i. gbic to host connector pin out table 1. gbic to host connector pin assignment ?sequence? indicates the order in which pins make contact when the device is hot plugged. for additional information, see ?table 3: signal definitions? in the gbic specification revision 5.5. 1 pin name pin # sequence rx_los* 1 2 gnd 2 2 gnd 3 2 mod_def(0) 4 2 mod_def(1) 5 2 mod_def(2) 6 2 tx_disable 7 2 gnd 8 2 gnd 9 2 gnd 10 2 gnd 11 1 -rx_dat 12 1 +rx_dat 13 1 gnd 14 1 v cc 15 2 v cc 16 2 gnd 17 1 +tx_dat 18 1 -tx_dat 19 1 gnd 20 1 note: rx_los is used for link indication on the fcm- 8520-3, and is internally grounded on the fcm-8521-3
fcm-8520/8521-3 1000base-t gbic product specification finisar ? finisar corporation page 3 rev a, feb 2003 ii. +5v volt electrical power interface the fcm-8520/8521-3 has an extended input voltage range of 4.5 to 5.5 v, compared to the gbic standard of 4.25 to 5.25 v. the 6v maximum voltage is not allowed for continuous operation. note: 1. caution : power consumption and inrush current are higher than the specified values in the gbic specification rev 5.5 1 . iii. low-speed signals rx_los is a ttl signals as described in table 3 and 4. mod_def(1) (scl) and mod_def(2) (sda), are open drain cmos signals (see section vii, ?serial communication protocol?). both mod_def(1) and mod_def(2) must be pulled up to host_vcc. for more detailed information, see sections 5.3.1 ? 5.3.8 in the gbic specification rev. 5.5 1 . +5 volt electrical power interface parameter symbol min typ max units notes/conditions supply current i s 310 375 ma 1.7w max power over full range of voltage and temperature. see note 1. input voltage v cc 4.5 5 5.5 v referenced to gnd. maximum voltage v max 6 v surge current i surge 450 ma hot plug. see note 1. table 2. +5 volt electrical power interface low-speed signals, electronic characteristics parameter symbol min max units notes/conditions gbic output low v ol 0 0.5 v 4.7k to 10k pull-up to host_vcc, measured at host side of connector gbic output high v oh host_vcc - 0.5 host_vcc + 0.3 v 4.7k to 10k pull-up to host_vcc, measured at host side of connector gbic input low v il 0 0.8 v 4.7k to 10k pull-up to vcc, measured at gbic side of connector gbic input high v ih 2 vcc + 0.3 v 4.7k to 10k pull-up to vcc, measured at gbic side of connector table 3. low-speed signals, electronic characteristics
fcm-8520/8521-3 1000base-t gbic product specification finisar ? finisar corporation page 4 rev a, feb 2003 iv. high-speed electrical interface all high-speed signals are ac-coupled internally. v. general specifications notes: 1. clock tolerance is 50 ppm 2. the fcm-8520/8521-3 is a full-duplex device in the ?preferred master? mode . 3. automatic crossover detection is enabled. external crossover cable is not required high-speed electrical interface, host-gbic parameter symbol min typ max units notes/conditions differential input voltage v indiff 0.50 2.00 v differential peak - peak differential output voltage v outdiff 0.37 2.00 v differential peak - peak rise/fall time t r ,t f 250 psec 20%-80% differential tx input impedance z in 75 ohm rx output impedance z out 75 ohm table 5. high-speed electrical interface, host-gbic general parameter symbol min typ max units notes/conditions data rate br 1.25 gb/sec ieee 802.3 compatible. see notes 1 and 2 below. cable length l 100 m category 5 utp. ber <10 -10 table 6. general specifications high-speed electrical interface, transmission line-gbic parameter symbol min typ max units notes/conditions line frequency f l 125 mhz 5-level encoding, per ieee 802.3ab. tx output impedance z out,tx 100 ohm differential, for all frequencies between 1mhz and 125mhz. rx input impedance z in,rx 100 ohm differential, for all frequencies between 1mhz and 125mhz. table 4. high-speed electrical interface, transmission line-gbic
fcm-8520/8521-3 1000base-t gbic product specification finisar ? finisar corporation page 5 rev a, feb 2003 vi. environmental specifications the FCM-8520-3 has an extended range from 0c to +75c case temperature as specified in table 8. vii. serial communication protocol all finisar gbics are ?module definition ?4?? and support the 2-wire serial communication protocol outlined in the gbic specification 1 . these gbics use an atmel at24c01a 128 byte e 2 prom with an address of a0h. for details on interfacing with the e 2 prom, see the atmel data sheet titled ?at24c01a/02/04/08/16 2-wire serial cmos e 2 prom.? 5 the 1000base-t physical layer ic can also be accessed via the 2-wire serial bus at address a4h. for details interfacing with the phy ic, see marvell data sheet titled ?alaska ultra 88e1011/88e1001s integrated gigabit ethernet transceiver? 6 (marvell document number mv-5100281-00). environmental specifications parameter symbol min typ max units notes/conditions operating temperature t op 0 75 c case temperature storage temperature t sto -40 85 c ambient temperature table 7. environmental specifications serial bus timing requirements parameter symbol min typ max units notes/conditions i 2 c clock rate 0 100,000 hz table 8. serial bus timing requirements
fcm-8520/8521-3 1000base-t gbic product specification finisar ? finisar corporation page 6 rev a, feb 2003 viii. mechanical specifications the host-side of the FCM-8520-3 conforms to the mechanical specifications outlined in the gbic specification revision 5.5, section 6 1 . the front portion of the gbic (part extending beyond the face plate of the host) is larger to accommodate the rj-45 connector. see figure 1 below for details. figure 1. fcm-8520/8521-3 mechanical dimensions
fcm-8520/8521-3 1000base-t gbic product specification finisar ? finisar corporation page 7 rev a, feb 2003 ix. references 1. ?gigabit interface converter (gbic) revision 5.5?. sun microsystems computer company et. al., september 27, 2000. http://playground.sun.com/pub/oemod/ 2. ieee std 802.3z. ieee standards department, 2000. 3. ?ieee std 802.3ab-1999 ?physical layer parameters and specifications for 1000 mb/s operation over 4-pair of category 5 balanced copper cabling, type 1000base-t?. ieee standards department, 1999. 4. ?application note an-xxxx: commonly asked questions regarding auto- negotiation on finisar?s 1000base-t gbics?, finisar corporation, february 2003 5. ?at24c01a/02/04/08/16 2-wire serial cmos e 2 prom?. atmel corporation. www.atmel.com 6. ?alaska ultra 88e1011/88e1001s integrated 10/100/1000 gigabit ethernet transceiver?. marvell corporation. www.marvell.com x. for more information finisar corporation 1308 moffett park drive sunnyvale, ca 94089-1133 tel. 1-408-548-1000 fax 1-408-541-6138 sales@finisar.com www.finisar.com
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