Product Overview
The SPT-GT727T2-SE2 is an XGS-PON OLT SFP+ transceiver fully compliant with ITU-T G.987.2 and G.9807.1 standards. This module supports single-fiber bidirectional data link with downstream rate of 9.953Gbps and upstream rate of 9.953Gbps(XGSPON) or 2.488Gbps(XGPON). It features a 1577nm continuous-mode EML laser transmitter and 1270nm burst-mode APD-TIA receiver. Powered by +3.3V supply, SFP+ package with SC/UPC receptacle connector, integrated 2-wire digital diagnostic monitoring interface with digital Received Signal Strength Indication(RSSI). Compliant with Class 1 laser safety standard IEC-60825, low EMI and excellent ESD protection. Suitable for XGSPON OLT and XGPON OLT application scenarios.
Features
- Single fiber bidirectional data link
- Downstream 9.953Gbps, upstream 9.953Gbps/2.488Gbps dual-rate
- 1577nm continuous-mode EML laser transmitter
- 1270nm burst-mode APD-TIA receiver
- Operating temperature: Commercial 0~+70°C / Industrial -40~+85°C
- +3.3V power supply
- SFP+ package with SC/UPC receptacle connector
- 2-wire interface for integrated Digital Diagnostic Monitoring(DDM)
- Digital Receiving Signal Strength Indication(RSSI)
- Low EMI and excellent ESD protection
- Class 1 laser safety standard IEC-60825 compliant
- RoHS compliance
Standards Compliance
- SFF-8431/SFF-8432
- SFF-8472
- ITU-T G.987.2
- ITU-T G.9807.1
- ITU-T G.9805
- FCC 47 CFR Part 15 Class B
- FDA 21 CFR 1040.10 and 1040.11 (except for deviations pursuant to Laser Notice No. 50 dated June 24, 2007)
Absolute Maximum Ratings
| Parameter | Min | Typ | Max | Unit |
|---|
| Storage Temperature | -40~85 | | | °C |
| Power Supply Voltage | 0 | | 3.6 | V |
| Storage Relative Humidity | 5 | | 95 | % |
| Operating Relative Humidity | 5 | | 85 | % |
Recommended Operating Conditions
| Parameter | Min | Typ | Max | Unit |
|---|
| Operating Case Temperature - SPT-GT727T2-SE2D (Commercial) | 0 | | +70 | °C |
| Operating Case Temperature - SPT-GT727T2-SE2TD (Industrial) | -40 | | +85 | °C |
| Power Supply Voltage | 3.13 | 3.3 | 3.47 | V |
| Power Consumption | | 2.5 | | W |
| Data Rate - XGSPON | TX 9.953 / RX 9.953 | | | Gbps |
| Data Rate - XGPON | TX 9.953 / RX 2.488 | | | Gbps |
| Fiber Length | 9/125μm core SMF | | 20 | km |
Electrical Characteristics
Transmitter Electrical Characteristics
| Parameter | Min | Typ | Max | Unit |
|---|
| Transmitter Differential Input Voltage Swing | 120 | | 820 | mV |
| Tx_Fault Output Voltage - High | 2.4 | | Vcc | V LVTTL |
| Tx_Fault Output Voltage - Low | | | 0.4 | V LVTTL |
| Tx_Disable Input Voltage - High | 2 | | Vcc | V LVTTL |
| Tx_Disable Input Voltage - Low | | | 0.8 | V LVTTL |
| Input Differential Impedance | 90 | 100 | 110 | Ω |
Receiver Electrical Characteristics
| Parameter | Min | Typ | Max | Unit |
|---|
| Receiver Differential Output Voltage Swing | 340 | | 850 | mV |
| RX_RESET Input Voltage - High | 2.0 | | Vcc | V LVTTL |
| RX_RESET Input Voltage - Low | | | 0.8 | V LVTTL |
| RX_SD Output Voltage - High | 2.4 | | Vcc | V LVTTL |
| RX_SD Output Voltage - Low | | | 0.4 | V LVTTL |
| Output Differential Impedance | 90 | 100 | 110 | Ω |
Optical Transmitter Characteristics
| Parameter | Min | Typ | Max | Unit |
|---|
| Average Output Power | +8 | | +11 | dBm Class E2 |
| Center Wavelength | 1575 | 1577 | 1580 | nm |
| Spectral Width (-20dB) | | | ≤1 | nm |
| Side Mode Suppression Ratio (SMSR) | ≥30 | | | dB |
| Extinction Ratio (ER) @2.488Gbit/s | ≥8.2 | | | dB PRBS 2²³-1+72CID |
| Transmitter and Dispersion Penalty (TDP) | | | ≤1 | dB Transmit on 20km SMF |
| Transmitter OFF Power | | | -39 | dBm |
| Output Eye Diagram | Compliant with ITU-T G.987.2 | | | |
Optical Receiver Characteristics (XGPON)
| Parameter | Min | Typ | Max | Unit |
|---|
| Center Wavelength | 1260 | 1270 | 1280 | nm |
| Receiver Sensitivity | | | -33.5 | dBm Class E2 |
| Input Saturation Power (Overload) | | | -13 | dBm Class E2 |
| SD Assert Level | Sensitivity-1 | | | dBm |
| SD De-assert Level | | | -45 | dBm |
| SD Hysteresis | 0.5 | | 6 | dBm |
| Receiver Reflectance | | | -20 | dB |
| Optical Return Loss Tolerance | | | 10 | dB |
| Note 1 | PRBS 2²³-1+72CID@2.488Mbps transmitter operating BER≤1×10⁻⁴ | | | |
Optical Receiver Characteristics (XGSPON)
| Parameter | Min | Typ | Max | Unit |
|---|
| Center Wavelength | 1260 | 1270 | 1280 | nm |
| Receiver Sensitivity | | | -32 | dBm Class E2 |
| Input Saturation Power (Overload) | | | -11 | dBm Class E2 |
| SD Assert Level | Sensitivity-1 | | | dBm |
| SD De-assert Level | | | -45 | dBm |
| SD Hysteresis | 0.5 | | 6 | dBm |
| Receiver Reflectance | | | -20 | dB |
| Optical Return Loss Tolerance | | | 10 | dB |
| Note 1 | PRBS 2³¹-1+72CID@9.953Mbps transmitter operating BER≤1×10⁻³ | | | |
Receiver Timing Characteristics
| Parameter | Min | Typ | Max | Unit |
|---|
| Guard Time - XGSPON | 64 | | | bytes |
| Guard Time - XGPON | 8 | | | bytes |
| Reset Pulse Width - XGSPON | | 25.6 | | ns |
| Reset Pulse Width - XGPON | | 25.6 | | ns |
| Receiver Amplitude Recovery Time (SETTLE) | | 24 | | ns |
| Signal Detect Assert Time | | 25 | | ns |
| Signal Detect De-assert Time | | 25 | | ns |
RSSI Characteristics
| Parameter | Min | Typ | Max | Unit |
|---|
| RSSI Trigger-Low | | | 0.8 | V |
| RSSI Trigger-High | 2.0 | | Vcc | V |
| RSSI Trigger Delay | 100 | | 300 | ns |
| Optical Signal During Time (ONT) | | 300 | | ns |
| RSSI Trigger Width | | 300 | | ns (T_ONT - T_D) |
| I2C Access Prohibited Time | | 500 | | μs |
| RSSI Monitoring Range - XGSPON | -27 | | -4 | dBm |
| RSSI Monitoring Range - XGPON | -28 | | -5 | dBm |
Digital Diagnostic Monitoring Information
| Parameter | Min | Typ | Max | Unit |
|---|
| Temperature | ±3 | | | °C Internal Calibration 1/256°C |
| Voltage | ±3% | | | Internal Calibration 0.1mV |
| Bias Current | ±10% | | | Internal Calibration 4μA |
| TX Power | ±3dB | | | Internal Calibration 0.2μW |
| RX Power | ±3dB | | | Internal Calibration 0.1μW |
Note: The digital diagnostic monitoring interface defines 256-byte memory map in EEPROM which makes use of the 8 bit address 1010001X(A2h) and 1011001X(B2h) respectively. Please refer to the SFF-8472 for the detail information.
Pin Definition
| Pin | Name | Description | Remark |
|---|
| 1 | Rate_Select | Rate selection | Dedicated upstream speed indication. High=10G Low=2.5G |
| 2 | Tx_Fault | Transmitter Fault | Low = Normal Operation High = Fault Indication |
| 3 | TX_Disable | Transmit Disable | Low = Normal Operation High = Disables Module |
| 4 | SDA | 2-Wire Serial Interface data line | LVTTL |
| 5 | SCL | 2-Wire Serial Interface clock line | LVTTL |
| 6 | MOD_ABS | Module absent indicate pin | Grounded inside the module |
| 7 | Rx_RESET | RX Reset Pulse Input | for TIA/LIA |
| 8 | Rx_SD | Rx Signal Detect | LVTTL Output High: normal; Low: loss of signal |
| 9 | RSSI_TRI | Receiver Signal Strength Indication trigger input | LVTTL Input |
| 10 | GND | Module Ground | |
| 11 | GND | Module Ground | |
| 12 | RD- | Receiver Inverted 9.953Gb/s and 2.488Gb/s Data Output | CML DC coupled |
| 13 | RD+ | Receiver Non-Inverted 9.953Gb/s and 2.488Gb/s Data Output | CML DC coupled |
| 14 | GND | Module Ground | |
| 15 | VCCR | Receiver 3.3V Power Supply | |
| 16 | VCCT | Transmitter 3.3V Power Supply | |
| 17 | GND | Module Ground | |
| 18 | TD+ | Non-Inverted 9.953Gbps Transmit Data Input | CML AC coupled |
| 19 | TD- | Inverted 9.953Gbps Transmit Data Input | CML AC coupled |
| 20 | GND | Module Ground | |
Ordering Information
| Model | Product Description |
|---|
| SPT-GT727T2-SE2D | Transceiver XGS PON OLT SFP+ 1577nmTx/1270nmRx 10G/10&2.5G Class E2 SC Interface with DDM Commercial Temperature |
| SPT-GT727T2-SE2TD | Transceiver XGS PON OLT SFP+ 1577nmTx/1270nmRx 10G/10&2.5G Class E2 SC Interface with DDM Industrial Temperature |
Contact Us
Email: info@sopto.com.cn
Web: http://www.sopto.com.cn
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