Features
Up to 1.25Gb/s bi-directional data links
Hot-pluggable SFP footprint
RX Los/without Los function
Fully metallic enclosure for low EMI
Low power dissipation (0.5 W typical)
Compact RJ-45 connector assembly
Access to physical layer IC via 2-wire serial bus
1000BASE-X operation in host systems with SERDES interface
10/100/1000Mbps compliant in host systems with SGMII interface
100Base-FX operation in host systems with SERDES interface
Operating case temperature range of 0°C to +70°C or -40°C to +85°C
Applications
1.25 Gigabit Ethernet over Cat 5 cable
Description
SFP-GE-T Copper Small Form Pluggable (SFP)transceivers are 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 supports 1000Mbps data- rate up to 100
meters reach over unshielded twisted-pair category 5 cable. The
module supports 1000 Mbps full duplex data links with 5-level Pulse
Amplitude Modulation (PAM) signals. All four pairs in the cable are
used with a symbol rate of 250Mbps on each pair. The module
provides standard serial ID information compliant with SFP MSA,
which can be accessed with an address of A0h via the 2wire serial
CMOS EEPROM protocol.
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.
