View Prices £ or or $
Ministry of Defence BT Inmarsat Science & Technology Facilities Council




Out of Stock
Uh Oh!! It looks like we've currently sold out of this product, but why not give us a call to find out when it's back in stock.
Lifetime Warranty
Free Delivery
Bulk Discounts +44 (0)1925 530 115
Product Details

Cisco GLC-SX-MMD, Ash S. Logistics

We regularly use the site to purchase our SFP’s and with the service we receive will continue to do so.

Recommendation Yes
Purchase From Us Again Yes

Extreme 10309, Ronald L. IT Support & Services

Couldn’t fault them. Overall very happy with the product and service, delivery arrived on time.

Recommendation Yes
Purchase From Us Again Yes

Dell 320-2879, Matthew E. Oil & Gas

Was after a cost-effective alternative brand to my usually OEM purchases.
Works without any issues.

Recommendation Yes
Purchase From Us Again Yes

Aruba JD062A, Violet G. IT Reseller

Very good service from start to finish. The part I wanted wasn’t in stock at the time of ordering, but the customer service team expedited my request and got it to me the day after.

Recommendation Yes
Purchase From Us Again Yes

Avaya 700260185, Fiona C. Tertiary Education

Great service at a very reasonable price. Order acknowledged with confirmation and delivered satisfactorily. I’d suggest to IT colleagues to adopt this brand.

Recommendation Yes
Purchase From Us Again Yes
Width 13.4
Depth 56.5
Height 8.5
Compatible Brand Cisco
Description 1000BASE-T Small Form-factor Pluggable (SFP).
Connector Type RJ-45 Connector
Data Link Protocol Gigabit Ethernet
Cabling Type IEEE Standard 802.3
Data Transfer Rate 1.25 Gb/s
Max Transfer Distance upto 100m
Transmitter Wavelength N/A
Form Factor SFP
Min Operating Temperature -5
Max Operating Temperature 85
Direct Attach Cables N/A
Cable Assembly Datarate N/A
Cable Assembly Length N/A
Cable Assembly Type N/A

SFP-GE-T (1000BASE-T SFP) Datasheet 

To download a PDF version of this datasheet, please CLICK HERE


  • Up to 1.25Gb/s bi-directional data links
  • Hot-pluggable SFP footprint
  • TX Disable and RX Los/without Los function
  • 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
  • Operating case temperature range of 0°C to +70°C (Commercial) or -20°C to +85°C (Extend)


  • 1.25 Gigabit Ethernet over Cat 5/ Cat 6 cable



The Compatible SFP Copper Small Form Factor Pluggable (SFP) transceiver is a 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 & 6 cable. 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 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, an input used to reset the transceiver module. 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 4.7K~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) RX_LOS (Loss of Signal): LVTTL compatible with a maximum voltage of Host_Vcc. RX_LOS can enabled or disabled (Refer to Ordering information), RX_LOS is not used and is always tied to ground via 100-ohm resistor.
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

+3.3V Volt Electrical Power Interface
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
Maximum Voltage Vmax     4 V  


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 connector


High-Speed Electrical Interface, Transmission Line-SFP

High-Speed Electrical Interface 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, 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

High-Speed Electrical Interface, 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   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

Parameter Symbol Min Typical Max Units Notes/Conditions
Data Rate BR 10   1000 Mb/sec IEEE 802.3 compatible. See Notes 2 through 4 below
Cable Length L     100 m Category 5 UTP. BER <10-12


  1. Clock tolerance is +/- 50 ppm
  2. By default, the GE-GB-PxRC-x is a full duplex device in preferred master mode
  3. Automatic crossover detection is enabled. External crossover cable is not required


Environmental Specifications

Parameter Symbol Min Typical Max Unit
Operating Case Temperature Commercial Tc 0   +70 °C
Extend -20   +85 °C
Storage Temperature   -40   +85 °C


Mechanical Specifications
The host-side of the GE-GB-PxRC-x 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 connector.              


Regulatory Compliance
SFP-Copper transceiver is designed to be Class I Laser safety compliant and is certified per the following standards:  

Feature Standard
Environmental protection RoHS Directive 2002/95/EC



  1. Small Form Factor Pluggable (SFP) Transceiver Multi-Source Agreement (MSA), September 2000.
  2. 3 – 2002.
  3. “AT24C01A/02/04/08/16 2-Wire Serial CMOS E2PROM”, Atmel Corporation.


Important Notice
Performance figures, data and any illustrative material provided in this datasheet are typical and must be specifically confirmed in writing by Compatible SFP before they become applicable to any particular order or contract. In accordance with the Compatible SFP policy of continuous improvement specifications may change without notice. The publication of information in this datasheet does not imply freedom from patent or other protective rights of Compatible SFP or others. Further details are available by emailing

All products carry a lifetime warranty against manufacturing defects and component failure for the duration of the original end users ownership. Read More...

All Compatible SFP products are delivered completely free-of-charge using our next day courier service to any mainland UK address.