1000BASE-T SFP

SFP-GE-TG

1000 BASE-T SFP Copper Transceiver with SERDES interface

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Features

  • Up to 1.25Gb/s bi-directional data links
  • Hot-pluggable SFP footprint
  • Fully metallic enclosure for low EMI
  • Low power dissipation
  • Compact RJ-45 connector assembly
  • Detailed product information in EEPROM
  • +3.3V single power supply
  • Access to physical layer IC via 2-wire serial bus
  • 1000 BASE-T operation in host systems with SERDES interface
  • Compliant with SFP MSA
  • Compliant with IEEE Std 802.3â„¢-2002
  • Compliant with FCC 47 CFR Part 15, Class B
  • RoHS6 Compliant

Applications

  • 1.25 Gigabit Ethernet over Cat 5 cable
  • Switch/Router to Switch/Router Link
  • High speed I/O for file servers

Description

SFP-GE-TG 1000 BASE-T copper SFP transceiver is 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 cable. The SFP-GE-TG supports 1000 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 SFP-GE-TG provides standard serial ID information compliant with SFP MSA, which can be accessed with address of A0h via the 2-wire serial CMOS EEPROM protocol. The physical IC can also be accessed via 2-wire serial bus at address ACh.

SFP to Host Connector Pin Out

Pin Signal Name Description MSA Notes
1 VEET Transmitter ground (common with receiver ground)
2 TFAULT Transmitter Fault. Not supported Note 1
3 TDIS Transmitter Disable. PHY disabled on high or open Note 2
4 MOD_DEF(2) Module Definition 2. Data line for Serial ID. Note 3
5 MOD_DEF(1) Module Definition 1. Clock line for Serial ID. Note 3
6 MOD_DEF(0) Module Definition 0. Grounded within the module. Note 3
7 Rate Select No connection required
8 LOS Loss of Signal - High Indicates Loss of Signal Note 4
9 VEER Receiver Ground (common with transmitter ground)
10 VEER Receiver Ground (common with transmitter ground)
11 VEER Receiver Ground (common with transmitter ground)
12 RD- Receiver Inverted DATA out. AC Coupled Note 5
13 RD+ Receiver Non-inverted DATA out. AC Coupled Note 5
14 VEER Receiver Ground (common with transmitter ground)
15 VCCR Receiver Power Supply Note 6
16 VCCT Transmitter Power Supply Note 6
17 VEET Transmitter Ground (Common with Receiver Ground)
18 TD+ Transmitter Non-Inverted DATA in. AC Coupled. Note 7
19 TD- Transmitter Inverted DATA in. AC Coupled. Note 7
20 VEET Transmitter Ground (common with receiver ground)

SFP to host connector pin assignments and descriptions

Notes:

  1. TX Fault is not used and is always tied to ground through a 100 ohm resistor.
  2. TX Disable as described in the MSA is not applicable to the 1000BASE-T module, but is used for convenience as an input to reset the internal ASIC. This pin is pulled up within the module with a 4.7 KΩ resistor.
    Low (0 – 0.8 V): Transceiver on
    Between (0.8 V and 2.0 V): Undefined
    High (2.0 – 3.465 V): Transceiver in reset state
    Open: Transceiver in reset state
  3. Mod-Def 0,1,2. These are the module definition pins. They should be pulled up with a 4.7–10 KΩ resistor on the host board to a supply less than VCCT + 0.3 V or VCCR + 0.3 V. Mod Def 0 is tied to ground through a 100 ohm resistor to indicate that the module is present. Mod-Def 1 is clock line of two wire serial interface for optional serial ID. Mod-Def 2 is data line of two wire serial interface for optional serial ID.
  4. LVTTL compatible with a maximum voltage of 2.5V. Not supported on NSF-SFP-T.
  5. RD-/+: These are the differential receiver outputs. They are AC coupled 100 ohm differential lines which should be terminated with 100 ohm differential at the user SerDes. The AC coupling is done inside the module and is thus not required on the host board. The voltage swing on these lines will be between 370 and 2000 mV differential (185 – 1000 mV single ended) when properly terminated. These levels are compatible with CML and LVPECL voltage swings.
  6. VCCR and VCCT are the receiver and transmitter power supplies. They are defined as 3.3 V ± 5% at the SFP connector pin. The maximum supply current is about 300mA and the associated in-rush current will typically be no more than 30 mA above steady state after 500 nanoseconds.
  7. TD-/+: These are the differential transmitter inputs. They are ac coupled differential lines with 100 Ω differential termination inside the module. The ac coupling is done inside the module and is thus not required on the host board. The inputs will accept differential swings of 500 – 2400 mV (250 –1200 mV single ended), though it is recommended that values between 500 and 1200 mV differential (250 – 600 mV single ended) be used for best EMI performance. These levels are compatible with CML and LVPECL voltage swings.

Diagram of host board connector block pin numbers and names

+3.3V Electrical Power Interface

The SFP-GE-TG has an input voltage range of 3.3 V +/- 5%. The 4 V maximum voltage is not allowed for continuous operation.

Parameter Symbol Min. Typical 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
Surge Current Isurge 30 mA Hot plug above steady state current. See caution note.

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

+3.3 Volt electrical power interface

Low-Speed Signals

MOD_DEF(1) (SCL) and MOD_DEF(2) (SDA) are open drain CMOS signals. Both MOD_DEF(1) and MOD_DEF(2) must be pulled up to host_Vcc.

Parameter Symbol Min. Max. Units Notes/Conditions
SFP Output LOW VOL 0 0.5 V 4.7k to 10k pull-up to host_Vcc.
SFP Output HIGH VOH host_Vcc -0.5 host_Vcc +0.3 V 4.7k to 10k pull-up to host_Vcc.
SFP Input LOW VIL 0 0.8 V 4.7k to 10k pull-up to Vcc.
SFP Input HIGH VIH 2 Vcc +0.3 V 4.7k to 10k pull-up to Vcc.

Low-speed signals, electronic characteristics

High-Speed Electrical Interface

All high-speed signals are AC-coupled internally.

 Transmission Line-SFP
Parameter Symbol Min. Typical Max. Units Notes/Conditions
Line Frequency fL 125 MHz 5-level encoding, per IEEE 802.3
Tx Output Impedance Zout,TX 100 Ohm Differential
Rx Input Impedance Zin,RX 100 Ohm Differential

High-speed electrical interface, transmission line-SFP

Host-SFP
Parameter Symbol Min. Typical Max. Units Notes/Conditions
Single ended data input swing Vinsing 250 1200 mV Single ended
Single ended data output swing Voutsing 350 100 800 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

Table 5. High-speed electrical interface, host-SFP


General Specifications
Parameter Symbol Min. Typical Max. Units Notes/Conditions
Data Rate BR 100 1,000 Mb/s IEEE 802.3 compatible.
Cable Length L 100 M Category 5 UTP. BER <10-12

Notes:

  1. Clock tolerance is +/- 50 ppm
  2. By default, the HTSFP-24-1111 is a full duplex device in preferred master mode
  3. Automatic crossover detection is enabled. External crossover cable is not required
  4. 1000 BASE-T operation requires the host system to have an SGMII interface with no clocks. With a SERDES interface that does not support SGMII, the module will operate at 1000BASE-T only.

Environmental Specifications

The NSF-SFP-T has an extended range from 0°C to +85°C case temperature as specified in Table 7.

Parameter Symbol Min. Typical Max. Units Notes/Conditions
Operating Temperature Top -40 85 °C Case temperature
Storage Temperature Tsto -40 100 °C Ambient temperature

Mechanical drawing:

Mechanical Dimensions of Transceiver

 

Ordering Information

Part Number Product Description
SFP-GE-TG -5~70℃ 1000Mbps only, SGMII interface, Copper SFP