SFP 1G BIDI
Description:
GOXS-BI3512-20
SFP, BIDI, 1.25G, 1310/1550NM,
20KM, SMF, DDM
Technical parameters
Overview:
The SFP-BIDI transceivers are high performance, cost effective modules supporting dual data-rate of 1.25Gbps/ 1.0625Gbps and 20km transmission distance with SMF. The transceiver consists of three sections: a FP laser transmitter, a PIN photodiode integrated with a trans-impedance preamplifier (TIA) and MCU control unit. All modules satisfy class I laser safety requirements. The transceivers are compatible with SFP Multi-Source Agreement (MSA) and SFF-8472. For further information, please refer to SFP MSA.
Features:
Dual data-rate of 1.25Gbps/1.063Gbps operation
1310nm FP laser and PIN photo detector for 20km transmission
Compliant with SFP MSA and SFF-8472 with single LC receptacle
Digital Diagnostic Monitoring:
Internal Calibration or External Calibration
Compatible with SONET OC-24-LR-1
Compatible with RoHS
+3.3V single power supply
Operating temperature: Standard : -5 to +70 degree
Industrial : -40 to +85 degree
Application:
Gigabit Ethernet
Fiber Channel
Switch to Switch interface
Switched backplane applications
Router/Server interface
Other optical transmission systems
Absolute Maximum Ratings:
| Parameter | Symbol | Min | Max | Unit |
| Supply Voltage | Vcc | -0.5 | 4.5 | V |
| Storage Temperature | Ts | -40 | +85 | °C |
| Operating Humidity | - | 5 | 85 | % |
Operating Conditions:
| Parameter | Symbol | Min | Typical | Max | Unit | |
| Operating Case Temperature | Standard | Tc | -5 | +70 | °C | |
| Industrial | -40 | +85 | °C | |||
| Power Supply Voltage | Vcc | 3.13 | 3.3 | 3.47 | V | |
| Power Supply Current | Icc | 300 | MA | |||
| Data Rate | 1.25 | Gbps |
Optical and Electrical Characteristics:
| Parameter | Symbol | Min | Typical | Max | Unit | Notes |
| Transmitter | ||||||
| Centre Wavelength | Ac | 1260 | 1310 | 1360 | nm | |
| Spectral Width (-20dB) | AA | 4 | nm | |||
| Side Mode Suppression Ratio | Pout | -9 | -2 | dBm | 1 | |
| Average Output Power | ER | 9 | dB | |||
| Extinction Ratio | tr/tf | 0.26 | ns | |||
| Optical Rise/Fall Time (20%~80%) | VIN | 400 | 1800 | mV | 2 | |
| Data Input Swing Differential | ZIN | 90 | 100 | 110 | O | |
| TX Disable Disable | 2.0 | Vcc | V | |||
| Enable | 0 | 0.8 | V | |||
| TX Fault Fault | 2.0 | Vcc | V | |||
| Normal | 0 | 0.8 | V | |||
| Receiver | ||||||
| Centre Wavelength | 1c | 1530 | 1570 | nm | ||
| Receiver Sensitivity | -23 | dBm | 3 | |||
| Receiver Overload | -3 | dBm | 3 | |||
| LOS De-Assert LOSD | -24 | dBm | ||||
| LOS Assert LOSA | -35 | dBm | ||||
| LOS Hysteresis | 1 | 4 | dB | |||
| Data Output Swing Differential | Vout | 370 | 1800 | mV | 4 | |
| LOS | High | 2.0 | Vcc | V | ||
| Low | 0.8 | V |
Notes:
1. The optical power is launched into SMF.
2. PECL input, internally AC-coupled and terminated.
3. Measured with a PRBS 27-1 test pattern @1250Mbps, BER ≤1×10-12.
4.Internally AC-coupled
Timing and Electrical:
| Parameter | Symbol | Min | Typical | Max | Unit |
| Tx Disable Negate Time | t_on | 1 | ms | ||
| Tx Disable Assert Time | t_off | 10 | µs | ||
| Time To Initialize, including Reset of Tx Fault | t_init | 300 | ms | ||
| Tx Fault Assert Time | t_fault | 100 | µs | ||
| Tx Disable To Reset | t_reset | 10 | µs | ||
| LOS Assert Time | t_loss_on | 100 | µs | ||
| LOS De-assert Time | t_loss_off | 100 | µs | ||
| Serial ID Clock Rate | f_serial_clock | 400 | KHz | ||
| MOD_DEF (0:2)-High | VH | 2 | Vcc | v | |
| MOD_DEF (0:2)-Low | VL | 0.8 | v |
Diagnostics:
| Parameter | Symbol | Min | Typical | Max |
| Temperature | -5 to +70 | °C | ±3°C | Internal / External |
| -40 to +85 | ||||
| Voltage | 3.0 to 3.6 | V | ±3% | Internal / External |
| Bias Current | 0 to 100 | mA | ±10% | Internal / External |
| TX Power | -9 to -2 | dBm | ±3dB | Internal / External |
| RX Power | -23 to -3 | dBm | ±3dB | Internal / External |
PIN Descriptions:
| Pin | Signal Name | Description | Plug Seq. | Notes |
| 1 | VEET | Transmitter Ground | 1 | |
| 2 | TX FAULT | Transmitter Fault Indication | 3 | Note 1 |
| 3 | TX DISABLE | Transmitter Disable | 3 | Note 2 |
| 4 | MOD_DEF(2) | SDA Serial Data Signal | 3 | Note 3 |
| 5 | MOD_DEF(1) | SCL Serial Clock Signal | 3 | Note 3 |
| 6 | MOD_DEF(0) | TTL Low | 3 | Note 3 |
| 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 | RD- | Inv. Received Data Out | 3 | Note 5 |
| 13 | RD+ | 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 | TD+ | Transmit Data In | 3 | Note 6 |
| 19 | TD- | 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 an open collector output, which should be pulled up with a 4.7k-10k resistor on the host board to a voltage between 2.0V and Vcc+0.3V. Logic 0 indicates normal operation; Logic 1 indicates a laser fault of some kind. In the low state, the output will be pulled to less than 0.8V.
2) TX Disable is an input that is used to shut down the transmitter optical output. It is pulled up within the module with a 4.7k-10k resistor. Its states are:
Low (0 to 0.8V):
(>0.8V, < 2.0V):
High (2.0 to 3.465V): Open:
Transmitter on
Undefined
Transmitter Disabled Transmitter Disabled
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) LOS is an open collector output, which should be pulled up with a 4.7k~10k resistor. Pull up voltage between 2.0V and Vcc+0.3V. Logic 1 indicates loss of signal; Logic 0 indicates normal operation. In the low state, the output will be pulled to less than 0.8V.
5) RD-/+: These are the differential receiver outputs. They are internally AC-coupled 100 differentia lines which should be terminated with 1000 (differential) at the user SERDES.
6) TD-/+: These are the differential transmitter inputs. They are internally AC-coupled, differential lines with 1000 differential termination inside the module
Ordering Information:
| Part Number | Product Description |
| GOXS-BI3512-20 | 1310nm/1550nm, 1.25Gbps, LC, 20km, -5 ~ +70 degree, with DDM |
| GOXS-BI3512-20IND | 1310nm/1550nm, 1.25Gbps, LC, 20km, -40 ~ +85 degree, with DDM |