Alpha Bridge AB-SFP-T Datasheet
Features
- Up to 25Gb/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
- 1000BASE-T operation in host systems with SERDES interface
- 10/100/1000Mbps compliant in host systems with SGMII interface
Applications
- 25 Gigabit Ethernet over Cat cable
Product Description
The Copper Small Form 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 supports 1000Mbps data- rate up to 100 meters reach over unshielded twisted-pair category cable. The module supports 1000Mbps 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. The physical IC can also be accessed via a 2wire serial bus at address A0h.
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 | Note 4 |
| 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 |
+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 |
Low-Speed Signals
| 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
| 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
| 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
| 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 |
Environmental Specifications
| Parameter | Symbol | Min | Typ. | Max | Units | Notes/Conditions |
| Operating Temperature | Top | 0 | 70 | °C | Case temperature | |
| Storage Temperature | Tsto | -40 | 85 | °C | Ambient temperature |
Ordering Information
| Part Number | Description |
| AB-SFP-T | 10/100/1000Mbps, Copper SFP, RJ45,100Meter |
| AB-SFP-G | 1000Mbps, Copper SFP, RJ45, 100Meter |
