ASCENT’s GPON OLT transceiver SFP-GG-SP-4931 C+ is designed for optical line terminal (OLT) for ITU-T G.984.2 Class C+ requirements Network transmission. The optical transceiver is compliant with the Small Form- Factor Pluggable (SFP) Multi-Source Agreement (MSA).
• Single-fiber bi-directional data links asymmetric TX 2488 Mbps / RX 1244 Mbps application
• 1490 nm continuous-mode DFB laser transmitter and 1310 nm burst-mode APD-TIA receiver
• Small Form Factor Pluggable package with SC/UPC Connector
• Support Class C+ 17 to 32dB attenuation range application (With FEC)
• Reset burst-mode receiver design support more than 15dB dynamic range
• 0 °C to 70°C operating temperature
• Single 3.3V power supply
• Digital diagnostic monitoring interface
• Digital burst RSSI function to monitor the input optical power level
• LVPECL compatible data input/output interface
• LVTTL transmitter disable control
• LVTTL transmitter laser fault alarm
• LVTTL receiver Signal Detect (SD) indication response within 50ns.
• Low EMI and excellent ESD protection
• Class I laser safety standard IEC-60825 compliant
• RoHS-6 compliance
• Complies with SFP Multi-Source Agreement (MSA) SFF-8074i
• Complies with SFF-8472 Rev 9.5
• Complies with ITU-T G.984.2 Amendment 2
• Complies with FCC 47 CFR Part 15, Class B
• Complies with FDA 21 CFR 1040.10 and 1040.11
Absolute Maximum
Parameter | Symbol | Min. | Typ. | Max. | Unit | Notes |
Storage Ambient Temperature | TSTG | ‑40 | 85 | °C | ||
Operating Case Temperature | Tc | 0 | 70 | °C | ||
Operating Humidity | OH | 5 | 95 | % | ||
Power Supply Voltage | VCC | 0 | 4 | V | ||
Receiver Damaged Threshold | +5 | dBm |
Recommended Operating Conditions
Parameter | Symbol | Min. | Typ. | Max. | Unit | Notes |
Power Supply Voltage | VCC | 3.13 | 3.3 | 3.47 | V | |
Operating Case Temperature | TC | 0 | 70 | |||
Operating Humidity Range | OH | 5 | 95 | % | ||
Nominal Data Rate | RX 1244.16 TX 2488.32 | Mbit/s |
Transmitter Optical Characteristics
Parameter | Symbol | Min. | Typ. | Max. | Unit | Notes |
Optical Center Wavelength | λC | 1480 | 1500 | nm | ||
Optical Spectrum Width (‑20dB) | ∆λ | 1 | nm | |||
Side Mode Suppression Ratio | SMSR | 30 | dB | |||
Average Launch Optical Power | AOP | +4 | +7 | dBm | BOL, Normal Temperature | |
+3 | +7 | dBm | BOL, 0 °C to +70 °C | |||
Power‑OFF Transmitter Optical Power | ‑39 | dBm | Launched into SMF | |||
Extinction Ratio | ER | 8.2 | dB | 1 | ||
Tolerance to Transmitter Incident Light Power | ‑15 | dB | ||||
Transmitter Reflectance | ‑10 | dB | ||||
Transmitter and Dispersion Penalty | TDP | 1 | dB | Transmit on 20 km SMF | ||
Optical Waveform Diagram | ITU‑T G.984.2 | See Figure 1 |
Notes:
1. PRBS 223‑1+72CID @2.488Gbit/s
Transmitter Electrical Characteristics
Parameter | Symbol | Min. | Typ. | Max. | Unit | Notes |
Data Input Differential Swing | 600 | 1600 | mV | LVPECL input, AC coupled | ||
Input Differential Impedance | 90 | 100 | 110 | Ω | ||
Power Supply Current | 220 | mA | Load free | |||
Transmitter Disable Voltage ‑ Low | 0 | 0.8 | V | |||
Transmitter Disable Voltage ‑ High | 2.0 | VCC | V | |||
Transmitter Fault Alarm Voltage ‑ Low | 0 | 0.4 | V | |||
Transmitter Fault Alarm Voltage – High | 2.4 | Vcc | V |
Figure 1 Transmitter Eye Mask Definitions And Test Procedure
Receiver Optical Characteristics
Parameter | Symbol | Min. | Typ. | Max. | Unit | Notes |
Operating Wavelength | 1290 | 1330 | nm | |||
Sensitivity | SEN | ‑32 | dBm | 1 | ||
Saturation Optical Power | SAT | ‑12 | dBm | |||
Dynamic Range | 15 | dB | Figure 2 | |||
Loss Of Signal De‑assert Level | ‑33 | dBm | ||||
Loss Of Signal Assert Level | ‑45 | dBm | ||||
Loss Of Signal Hysteresis Receiver Reflectance | 0.5 | 6 | dBm | |||
Receiver Reflectance | ‑12 | dB |
Notes:
1. PRBS 223‑1 + 72CID @ 1.244 Gbps. BER ≤ 1 × 10‑10
Figure 2 Burst Mode Receiver Dynamic Range in GPON System
Receiver Electrial Characteristics
Parameter | Symbol | Min. | Typ. | Max. | Unit | Notes |
Power Supply Current | 350 | mA | Load free | |||
Data Output Voltage – Low(‑Vcc) | ‑1.81 | ‑1.62 | V | |||
Data Output Voltage – High(‑Vcc) | ‑1.02 | ‑0.88 | V | |||
Data Output Differential Swing | 400 | 1600 | mV | LVPECL output, DC coupled | ||
Reset width | TRESET | 16 | bits | |||
Reset‑Low | 0 | 0.4 | V | |||
Reset‑High | 2.4 | Vcc | V | |||
Receiver Amplitude Recovery Time | TRECOVERY | 32 | bits | Refer to the reset signal falling edge | ||
Signal Detect Assert Time | 50 | ns | ||||
Signal Detect De‑assert Time | 12.8 | ns | Refer to the reset signal rising edge | |||
Signal Detect Voltage‑Low | 0 | 0.4 | V | |||
Signal Detect Voltage‑High | 2.4 | Vcc | V | |||
RSSI Trigger‑Low | 0 | 0.8 | V | |||
RSSI Trigger‑High | 2.0 | Vcc | V | |||
Optical Signal During Time | Tont | 300 | ns | |||
RSSI Trigger width | TW | 300 | Tont‑TD | ns | ||
RSSI Trigger Delay | TD | 0 | 3000 | ns | ||
I2C Access Prohibited Time | 500 | μs |
Figure 3 Burst Receiver Timing Sequence
Figure 4 RSSI Timing Sequence