Product Features:
l Up to 1.25Gbps Data Links;
l 1550nm DFB laser/1310nm FP laser transmitter and PIN/TIA receiver;
l Maximum link length of 20km on 9/125um SMF;
l Hot-pluggable SFP footprint;
l Low power dissipation;
l BIDI SC/UPC type pluggable optical interface;
l Metal enclosure, for lower EMI;
l Compliant with RoHS;
l Single +3.3V power supply;
l Compliant with SFF-8472;
l Case operating temperature;
Commercial: 0°C to +70°C
I. Pin Diagram
Pinout of Connector Block on Host Board
II. Pin Descriptions
Pin | Symbol | Name/Description | Ref. |
1 | VEET | Transmitter Ground (Common with Receiver Ground) | 1 |
2 | TFAULT | Transmitter Fault. | 2 |
3 | TDIS | Transmitter Disable. Laser output disabled on high or open. | 3 |
4 | MOD_DEF(2) | Module Definition 2. Data line for Serial ID. | 4 |
5 | MOD_DEF(1) | Module Definition 1. Clock line for Serial ID. | 4 |
6 | MOD_DEF(0) | Module Definition 0. Grounded within the module. | 4 |
7 | Rate Select | No connection required | |
8 | LOS | Loss of Signal indication. Logic “0” indicates normal operation. | 5 |
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 (CML). AC Coupled | |
13 | RD+ | Receiver Non-inverted DATA out (CML). 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 internally isolated from chassis ground.
2. TX Fault is an open drain output, which should be pulled up with 4.7K – 10KΩ resistor on the host board. Pull up voltage between 2.0V to VccT/R+0.3V. When high, output indicates a laser fault of some kind. Low indicates normal operation. In the low state, the output will be pulled to < 0.8V. When sensing an improper power level in the laser driver, the SFP sets this signal high and turns off the laser. TX-FAULT can be reset with the TX-DISABLE line. The signal is in LVTTL level.
3.TX disable is an input that is used to shut down the transmitter optical output. It is pulled up within the module with 4.7K – 10KΩ resistor. Its states are: Low (0 – 0.8V): Transmitter on; (>0.8, < 2.0V): Undefined; High (2.0V to VccT/R+0.3V): Transmitter Disabled; Open: Transmitter Disabled. The TX-DISABLE signal is high (LVTTL logic “1”) to turn off the laser output. The laser will turn on when TX-DISABLE is low (LVTTL logic “0”).
4. Should be pulled up with 4.7K - 10KΩ on host board to a voltage between 2.0V to VccT/R+0.3V. MOD_DEF (0) pulls line low to indicate module is plugged in.
5. LOS (Loss of Signal) is an open collector/drain output, which should be pulled up with 4.7K – 10KΩ resistor. Pull up voltage between 2.0V to VccT/R+0.3V. When high, this output indicates the received optical power is below the worst-case receiver sensitivity (as defined by the standard in use). Low indicates normal operation. In the low state, the output will be pulled to < 0.8V.
The RX-LOS is high (LVTTL logic “1”) when there is no incoming light from the companion transceiver. This signal is normally used by the system for the diagnostic purpose. The signal is operated in LVTTL level.
III. Absolute Maximum Ratings
Parameter | Symbol | Min | Type | Max | Unit | Ref. |
Storage Temperature | TS | -40 | 85 | ºC | ||
Storage Ambient Humidity | HA | 5 | 95 | % | ||
Power Supply Voltage Signal Input Voltage | VCC
| -0.5 | 4 | V V | ||
-0.3 | Vcc+0.3 | |||||
Receiver Damage Threshold | +3 | dBm | ||||
Lead Soldering Temperature/Time | TSOLD | 260/10 | ºC/sec | 1 | ||
Lead Soldering Temperature/Time | TSOLD | 360/10 | ºC/sec | 2 |
Notes:
1.Suitable for wave soldering.
2.Only for soldering by iron.
IV. Recommended Operating Conditions (TOP = 0°C to 70°C, VCC = 3.3 ± 5% Volts)
Parameter | Symbol | Min. | Typ. | Max. | Unit | Ref. |
Case Operating Temperature | Tcase | 0 | 70 | ºC | FSGCSB53(F35)-K20C | |
-20 | 85 | FSGCSB53(F35)-K20E | ||||
-40 | 85 | FSGCSB53(F35)-K20I | ||||
Ambient Humidity | HA | 5 | 70 | % | Non-condensing | |
Power Supply Voltage | VCC | 3.13 | 3.3 | 3.47 | V | |
Power Supply Current | ICC | 280 | mA | |||
Data Rate | 1250/1250 | Mbps | TX Rate/RX Rate | |||
Transmission Distance | 20 | km | ||||
Coupled Fiber | Single mode fiber | 9/125um G.652 | ||||
V. Optical Characteristics (TOP = 0°C to 70°C, VCC = 3.3 ± 5% Volts)
Parameter | Symbol | Min. | Typ. | Max. | Unit | Remark |
Transmitter | ||||||
Average Output Power | POUT | -9 | -3 | dBm | ESGCLF35(B53) | |
Extinction Ratio | ER | 9 | dB | |||
Center Wavelength | λC | 1260 | 1310 | 1360 | nm | ESGCLF35 |
1530 | 1550 | 1570 | ESGCLB53 | |||
Spectrum Width (RMS) | σ | 3.5 | nm | FP Laser (TX:1310nm) | ||
Side Mode Suppression Ratio | SMSR | 30 | dB | DFB Laser (TX:1550nm) | ||
Spectrum Bandwidth(-20dB) | σ | 1 | nm | |||
Transmitter OFF Output Power | POff | -45 | dBm | |||
Jitter p-p | tJ | 0.1 | UI | 1 | ||
Output Eye Mask | Compliant with IEEE802.3z (class 1 laser safety) | 2 | ||||
Receiver | ||||||
Input Optical Wavelength | λIN | 1500 | 1550 | 1600 | nm | ESGCLF35 |
1290 | 1310 | 1330 | ESGCLB53 | |||
Receiver Sensitivity | PIN | -23 | dBm | 3 | ||
Input Saturation Power (Overload) | PSAT | -3 | dBm | |||
LOS of Signal Assert | PA | -45 | dBm | |||
LOS of Signal De-assert | PD | -23.5 | dBm | 4 | ||
LOS Hysteresis | PD-PA | 0.5 | 6 | dB | ||
Notes:
1.Measure at 2^7-1 NRZ PRBS pattern.
2.Transmitter eye mask definition.
3. Measured with Light source 1550nm(1310nm), ER=9dB; BER =<10^-12 @PRBS=2^7-1 NRZ.
4. When LOS De-asserted, the RX data+/- output is signal output.
VI. Electrical Characteristics (TOP = 0°C to 70°C, VCC = 3.3 ± 5% Volts)
Parameter | Symbol | Min. | Typ. | Max. | Unit | Ref. |
Transmitter | ||||||
Total Supply Current | ICC | 300 | mA | 1 | ||
Transmitter Disable Input-High | VDISH | 2 | Vcc+0.3 | V | LVTTL | |
Transmitter Disable Input-Low | VDISL | 0 | 0.8 | V | ||
Transmitter Fault Input-High | VTxFH | 2 | Vcc+0.3 | V | ||
Transmitter Fault Input-Low | VTxFL | 0 | 0.8 | V | ||
Receiver | ||||||
Total Supply Current | ICC | B | mA | 1 | ||
LOS Output Voltage-High | VLOSH | 2 | Vcc+0.3 | V | LVTTL | |
LOS Output Voltage-Low | VLOSL | 0 | 0.8 | V | ||
Notes:
1.A (TX) + B (RX) = 280mA(Not include termination circuit).
VII. Digital Diagnostic Memory Map
VIII. Digital Diagnostic Monitoring Information
Parameter | Unit | Accuracy |
Case Temperature | ℃ | ±3 |
Supply Voltage | V | ±3% |
Tx Bias Current | mA | ±10% |
Tx Optical Power | dB | ±3 |
Rx Optical Power | dB | ±3 |
IX. Recommended Interface Circuit
X. Mechanical Dimensions
SFP wire mechanical drawing (Unit: mm)
Product Features
l Up to 1.25Gbps Data Links
l 1550nm DFB laser/1310nm FP laser transmitter and PIN/TIA receiver
l Maximum link length of 20km on 9/125um SMF
l Hot-pluggable SFP footprint
l Low power dissipation
l BIDI SC/UPC type pluggable optical interface
l Metal enclosure, for lower EMI
l Compliant with RoHS
l Single +3.3V power supply
l Compliant with SFF-8472
l Case operating temperature
Commercial: 0°C to +70°C
Applications | Compliance |
Switch to Switch Interface | SFP MSA |
Fast Ethernet | SFF-8472 |
Switched Backplane Applications | IEEE802.3z |
Other Optical Links Router/server Interface | ROHS |
Ordering Information
Part No. | Bit Rate (Gbps) | Laser (nm) | Distance（km） | Fiber Type | DDMI | Connector | Temp |
FSGCSB53-K20C | 1.25 | 1550 | 20 | SMF | YES | LC | 0℃~70℃ |
FSGCSB53-K20I | 1.25 | 1550 | 20 | SMF | YES | LC | -40℃~85℃ |
FSGCSF35-K20C | 1.25 | 1310 | 20 | SMF | YES | LC | 0℃~70℃ |
FSGCSF35-K20I | 1.25 | 1310 | 20 | SMF | YES | LC | -40℃~85℃ |