● 1.25Gb/s SFP, 1310nm FP, SM, 20km, 12.5dB
SM100GSA-20 Copper Small Form Pluggable
(SFP) transceivers are based on the SFP Multi Source Agreement (MSA).
They are compatible with the Gigabit Ethernet and 1000BASE-T standards
as specified in IEEE Std 802.3 . The 1000BASE-T physical layer IC (PHY)
can be accessed via I2C, allowing access to all PHY settings and features.
The 1000BASE-T uses the SFP’s RX_LOS pin for link indication. If pull up
SFP’s TX_DISABLE pin, PHY IC be reset..
Product choice
| Product part Number | Link Indicator on RX_LOS Pin | Support 1000base-X | Support SGMII |
| SFP-1000BASE-T | Yes | Yes(default) | Yes |
| SFP-1000BASE-T-SGMII | Yes | No | Yes |
SFP to Host Connector Pin Out
| Pin | Symbol | Name/Description | Ref |
| 1 | VEET | Transmitter Ground (Common with Receiver Ground) | 1 |
| 2 | TFAULT | Transmitter Fault. Not supported. | |
| 3 | TDIS | Transmitter Disable. Laser output disabled on high or open. | 2 |
| 4 | MOD_DEF(2) | Module Definition 2. Data line for Serial ID. | 3 |
| 5 | MOD_DEF(1) | Module Definition 1. Clock line for Serial ID. | 3 |
| 6 | MOD_DEF(0) | Module Definition 0. Grounded within the module. | 3 |
| 7 | Rate Select | No connection required | |
| 8 | LOS | Loss of Signal indication. Logic 0 indicates normal operation. | 4 |
| 9 | VEER | Receiver Ground (Common with Transmitter Ground) | 1 |
| 10 | VEER | Receiver Ground (Common with Transmitter Ground) | 1 |
| 11 | VEER | Receiver Ground (Common with Transmitter Ground) | 1 |
| 12 | RD- | Receiver Inverted DATA out. AC Coupled | |
| 13 | RD+ | Receiver Non-inverted DATA out. AC Coupled | |
| 14 | VEER | Receiver Ground (Common with Transmitter Ground) | 1 |
| 15 | VCCR | Receiver Power Supply | |
| 16 | VCCT | Transmitter Power Supply | |
| 17 | VEET | Transmitter Ground (Common with Receiver Ground) | 1 |
| 18 | TD+ | Transmitter Non-Inverted DATA in. AC Coupled. | |
| 19 | TD- | Transmitter Inverted DATA in. AC Coupled. | |
| 20 | VEET | Transmitter Ground (Common with Receiver Ground) | 1 |
Notes:
1. Circuit ground is connected to chassis ground
2. PHY disabled on TDIS > 2.0V or open, enabled on TDIS < 0.8V
3. Should be pulled up with 4.7k – 10k Ohms on host board to a voltage between 2.0 V and 3.6 V. MOD_DEF(0) pulls line low to indicate module is plugged in.
4. LVTTL compatible with a maximum voltage of 2.5V.
Not supported on 10/100/1000BASE-T.
Diagram of host board connector block pin numbers and names
+3.3V Volt Electrical Power Interface
The SFP-1000BASE-T/SFP-1000BASE-T-SGMII has an input voltage range of 3.3 V +/- 5%. The 4V maximum voltage is not allowed for continuous operation.
| +3.3 Volt Electrical Power Interface | ||||||
| Parameter | Symbol | Min | Typ | Max | unit | Notes/Conditions |
| Supply Current | Is | 320 | 375 | mA | 1.2W max power overfull range of voltageand 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 statecurrent. 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.
| Low-Speed Signals, Electronic Characteristics | |||||
| Parameter | Symbol | Min | Max | unit | 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
All high-speed signals are AC-coupled internally
| High-Speed Electrical Interface, Transmission Line-SFP | ||||||
| Parameter | Symbol | Min | Typ | Max | unit | Notes/Conditions |
| Line Frequency | fL | 125 | MHz | 5-level encoding, perIEEE 802.3 | ||
| Tx Output Impedance | Zout,TX | 100 | Ohm | Differential, for allfrequencies between1MHz and 125MHz | ||
| Rx Input Impedance | Zin,RX | 100 | Ohm | Differential, for allfrequencies between1MHz and 125MHz | ||
| High-Speed Electrical Interface, Host-SFP | ||||||
| Parameter | Symbol | Min | Typ | Max | unit | Notes/Conditions |
| Single ended data inputswing | Vinsing | 250 | 1200 | mV | Single ended | |
| Single ended data outputswing | 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
| General | ||||||
| Parameter | Symbol | Min | Typ | Max | unit | 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 | ||
| Notes: 1. Clock tolerance is +/- 50 ppm 2. By default, the SFP-1000BASE-T/SFP-1000BASE-T-SGMII is a full duplex device in preferred master mode. 3. Automatic crossover detection is enabled. External crossover cable is not required. |
Environmental Specifications
| Environmental Specifications | ||||||
| Parameter | Symbol | Min | Typ | Max | unit | Notes/Conditions |
| Operating Temperature | Top | -40 | 70 | °C | Case temperature | |
| Storage Temperature | Tsto | -40 | 85 | °C | Ambient temperature | |
Serial Communication Protocol
All SFPs support the 2-wire serial communication protocol outlined in the
SFP MSA. These SFPs use an MCU, can be accessed with address of A0h.
The 1000BASE-T physical layer IC can also be accessed via the 2-wire serial bus
at address ACh. For details interfacing with the PHY IC, see Marvell data sheet
titled “Alaska Ultra 88E1111 Integrated Gigabit Ethernet Transceiver”
(Marvell document number MV-S100649-00).
| Serial Bus Timing, Requirements | ||||||
| Parameter | Symbol | Min | Typ | Max | unit | Notes/Conditions |
| I2C Clock Rate | 0 | 200,000 | Hz | |||
Mechanical Specifications (Unit:mm)
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