Sfp 1.25gbps 100 Metros Elétrico

Features 

  • Up to 1.25 GB/s bi-directional data links 
  • Hot-pluggable SFP footprint 
  • Extended case temperature range (0°C to 70°C ) 
  • Fully metallic enclosure for low EMI 
  • Low power dissipation (1.05 W typical) 
  • Compact RJ-45 connector assembly 
  • Access to physical layer IC via 2-wire serial bus 
  • 1000 BASE-T operation in host systems with SERDES interface 
  • 10/100/1000Mbps compliant in host systems with SGMII interface 

Applications 

  • 1.25 Gigabit Ethernet over Cat 5 cable 

Description 

Copper Small Form Pluggable (SFP) transceivers are high performance, cost effective module compliant with the Gigabit Ethernet and 1000BASE-T standards as specified in IEEE 802. 3-2002 and IEEE 802.3ab, which supporting 1000Mbps data- rate up to 100 meters reach over unshielded twisted-pair category 5 cables. The module supports1000 Mbps full duplex data-links with 5-level Pulse Amplitude Modulation (PAM) signals. All four pairs in the cable are used with symbol rate at 250Mbps on each pair. The module provides standard serial ID information compliant with SFP MSA, which can be accessed with address of A0h via the 2wire serial CMOS EEPROM protocol. The physical IC can also be accessed via 2wire serial bus at address ACh. 

Pin Definitions 

Pin Diagram 

Pin Descriptions

 

Pin

Signal Name

Description

Plug Seq.

Notes

1

                    VEET                     Transmitter Ground                     1

2

                    TX FAULT                     Transmitter Fault Indication                     3                     Note1

3

                    TX DISABLE                     Transmitter Disable                     3                     Note2

4

                    MOD_DEF(2)                     SDA Serial Data Signal                     3                     Note3

5

                    MOD_DEF(1)                     SCL Serial Clock Signal                     3                     Note3

6

                    MOD_DEF(0)                     TTL Low                     3                     Note3

7

                    Rate Select                     Not Connected                     3

8

                    LOS                     Loss of Signal                     3                     Note4

9

                    VEER                     Receiver ground                     1

10

                    VEER                     Receiver ground                     1

11

                    VEER                     Receiver ground                     1

12

                    RX-                     Inv. Received Data Out                     3                     Note 5

13

                    RX                     Received Data Out                     3                     Note 5

14

                    VEER                     Receiver ground                     1

15

                    VCCR                     Receiver Power Supply                     2

16

                    VCCT                     Transmitter Power Supply                     2

17

                    VEET                     Transmitter Ground                     1

18

                    TX                     Transmit Data In                     3                     Note 6

19

                    TX-                     Inv. Transmit Data In                     3                     Note 6

20

                    VEET                     Transmitter Ground                     1

     Notes:

     Plug Seq.: Pin engagement sequence during hot plugging. 

    1) TX Fault is not supported and is always connected to ground. 

    2) TX Disable is not supported. 

    3) Mod-Def 0, 1, 2. These are the module definition pins. They should be pulled up with a 4.7K to 10K resistor on the host board. The pull-up voltage shall be VccT or VccR

     Mod-Def 0 is grounded by the module to indicate that the module is present

     Mod-Def 1 is the clock line of two wire serial interface for serial ID Mod-Def 2 is the data line of two wire serial interface for serial ID

     4) LOS is not supported in 10/100/1000base-T  

    5) RD-/ : These are the differential receiver outputs. They are AC coupled 100 differential lines which should be terminated with 100 (differential) at the user SERDES.

     6) TD-/ : These are the differential transmitter inputs. They are AC-coupled, differential lines with 100 differential termination inside the module. 

3.3V Volt Electrical Power Interface 

    Has an input voltage range of 5V /- 5%. The 3.3V maximum voltage is not allowed for continuous operation. 

 

Table 1.  3.3V Volt electrical power interface 

3.3V volt Electrical Power Interface

Parameter Symbol Min Typ Max Units Notes/Conditions
                    Supply Current                     Is                     320                     375                     mA                 1.2W max power over full range of voltage and temperature. See caution note below
                    Input Voltage                     Vcc                     3.13                     3.3                     3.47                     V                     Referenced to GND
                    Maximum Voltage                     Vmax                     4                     V
                    Surge Current                     Isurge                     30                     mA                 Hot plug above steady state current. See caution note below

     Caution: Power consumption and surge current are higher than the specified values in the SFP MSA 

Low-Speed Signals 

    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.

 

Table 2. Low-speed signals, electronic characteristics 

Low-Speed Signals, Electronic Characteristics

Parameter Symbol Min Max Units Notes/Conditions
                    SFP Output LOW                     VOL                     0                     0.5                     V                 4.7k to 10k pull-up to host_Vcc, measured at host side of connector
                    SFP Output HIGH                     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
                    SFP Input LOW                     VIL                     0                     0.8                     V                     4.7k to 10k pull-up to Vcc, measured at SFP side of connector
                    SFP Input HIGH                     VIH                     2                     Vcc 0.3                     V                     4.7k to 10k pull-up to Vcc, measured at SFP side of conector

 High-Speed Electrical Interface 

    All high-speed signals are AC-coupled internally.

 

Table 3. High-speed electrical interface, transmission line-SFP 

High-Speed Electrical Interface Transmission Line-SFP

Parameter Symbol Min Typ Max Units Notes/Conditions
                    Line Frequency                     fL                     125                     MHz                     5-level encoding, per IEEE 802.3
                    Tx Output Impedance                     Zout,TX                     100                     Ohm                     Differential, for all Frequencies between

                    1MHz and 125MHz

                    Rx Input Impedance                     Zin,RX                     100                     Ohm                     Differential, for all Frequencies between

                    1MHz and 125MHz

  

High-speed electrical interface, host-SFP

 

Table 4. High-speed electrical interface, host-SFP 

High-Speed Electrical Interface, Host-SFP

Parameter Symbol Min Typ Max Units Notes/Conditions
                    Single ended data input swing                     Vinsing                     250                     1200                     mV                     Single ended
                    Single ended data output swing                     Voutsing                     350                     800                     mV                     Single ended
                    Rise/Fall Time                     Tr,Tf                     175                     psec                     20%-80%
                    Tx Input Impedance                     Zin                     50                     Ohm                     Single ended
                    Rx Output Impedance                     Zout                     50                     Ohm                     Single ended

 

General Specifications

 

Table 5. General specifications 

General

Parameter Symbol Min Typ Max Units Notes/Conditions
                    Data Rate                     BR                     10                     1,000                     Mb/sec                 IEEE 802.3 compatible. See Notes 2 through 4 below
                    Cable Length                     L                     100                     m                 Category 5 UTP. BER<10-12

 Notes:

     1. Clock tolerance is /- 50 ppm 

    2. By default, the SPT-PE-T1 is a full duplex device in preferred master mode 

    3. Automatic crossover detection is enabled. External crossover cable is not required

 

Environmental Specifications

 

Table 6. Environmental specifications 

Environmental Specifications

Parameter Symbol Min Type Max Units Notes/Conditions
                    Operating Temperature                     Top                     0                     70                     °C                     Case temperature
                    Storage Temperature                     Tsto                     -40                     85                     °C                     Ambient temperature

 

References 

    1. Gigabit Interface Converter (SFP) Transceiver Multi-Source Agreement (MSA), 

    2. IEEE Std 802.3, 2002 Edition. IEEE Standards Department, 2002. 

    3. “AT24C01A/02/04/08/16 2-Wire Serial CMOS E2PROM”, Atmel Corporation. 

    4. “Alaska Ultra 88E1111 Integrated 10/100/1000 Gigabit Ethernet Transceiver”, Marvell Corporation.

 

Mechanical Specifications 

    The host-side of the SPT-PE-T1 conforms to the mechanical specifications outlined in the SFP MSA1. 

    The front portion of the SFP (part extending beyond the face plate of the host) is larger to accommodate the 

    RJ-45 conector. 

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