FCM-8521-3

Finisar 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 (0°C to +75°C) Hot-pluggable Fully metallic enclosure for low EMI Low power (1.5W typical) Access to physical layer IC via 2wire 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 5.51. They are compatible with the Gigabit Ethernet and 1000BASE-T standards as specified in IEEE Std 802.3z2 and IEEE Std 802.3ab3. 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 FCM-8520-3 FCM-8521-3 Link Indicator on RX_LOS Pin Yes No Compatible with 1000BASE-X Auto-negotiation No Yes  Finisar Corporation Rev A, Feb 2003 Page 1 FCM-8520/8521-3 1000BASE-T GBIC Product Specification Finisar I. GBIC to Host Connector Pin Out Pin Name RX_LOS* GND GND MOD_DEF(0) MOD_DEF(1) MOD_DEF(2) TX_DISABLE GND GND GND GND -RX_DAT +RX_DAT GND VCC VCC GND +TX_DAT -TX_DAT GND Pin # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Sequence 2 2 2 2 2 2 2 2 2 2 1 1 1 1 2 2 1 1 1 1 Note: RX_LOS is used for link indication on the FCM8520-3, and is internally grounded on the FCM-8521-3 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  Finisar Corporation Rev A, Feb 2003 Page 2 FCM-8520/8521-3 1000BASE-T GBIC Product Specification Finisar 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. +5 Volt Electrical Power Interface Parameter Supply Current Symbol Is Min Typ 310 Max 375 Units mA Notes/Conditions 1.7W max power over full range of voltage and temperature. See Note 1. Referenced to GND. Input Voltage Maximum Voltage Surge Current Vcc Vmax Isurge 4.5 5 5.5 6 450 V V mA Hot plug. See Note 1. Table 2. +5 Volt electrical power interface Note: 1. Caution: Power consumption and inrush current are higher than the specified values in the GBIC Specification Rev 5.51. 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. 5.51. Low-Speed Signals, Electronic Characteristics Parameter GBIC Output LOW GBIC Output HIGH GBIC Input LOW Symbol VOL Units Notes/Conditions V 4.7k to 10k pull-up to host_Vcc, measured at host side of connector VOH host_Vcc - 0.5 host_Vcc + 0.3 V 4.7k to 10k pull-up to host_Vcc, measured at host side of connector VIL 0 0.8 V 4.7k to 10k pull-up to Vcc, measured at GBIC side of connector VIH 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 Page 3 Min 0 Max 0.5 GBIC Input HIGH  Finisar Corporation Rev A, Feb 2003 FCM-8520/8521-3 1000BASE-T GBIC Product Specification Finisar High-Speed Electrical Interface, Transmission Line-GBIC Parameter Line Frequency Tx Output Impedance Notes/Conditions 5-level encoding, per IEEE 802.3ab. Zout,TX 100 Ohm Differential, for all frequencies between 1MHz and 125MHz. Zin,RX 100 Ohm Differential, for all frequencies between 1MHz and 125MHz. Table 4. High-speed electrical interface, transmission line-GBIC Symbol fL Min Typ 125 Max Units MHz Rx Input Impedance IV. High-Speed Electrical Interface All high-speed signals are AC-coupled internally. High-Speed Electrical Interface, Host-GBIC Parameter Differential Input Voltage Differential Output Voltage Rise/Fall Time Tx Input Impedance Rx Output Impedance Symbol Vindiff Voutdiff Tr,Tf Zin Zout Min 0.50 0.37 250 75 75 Typ Max 2.00 2.00 Units V V psec Ohm Ohm Notes/Conditions Differential peak - peak Differential peak - peak 20%-80% Differential Table 5. High-speed electrical interface, host-GBIC V. General Specifications General Parameter Data Rate Cable Length Symbol Min BR L Units Notes/Conditions Gb/sec IEEE 802.3 compatible. See Notes 1 and 2 below. 100 m Category 5 UTP. BER