Model type | Compact-SFP-1.25G-LR | Brand | HTF |
Encapsulation | CSFP | Data Rate | 1250Mb/s |
Wavelength | 1310/1550(nm) | Reach | 20KM |
Interface | BIDI LC/UPC | Protocols | SFF-8472 MSA Compliant |
Cable Type | SMF(9/125µm) | DDM Support | Yes |
Tx power | -9~-3dBm | Rx Sens | <-20dBm |
Commercial Temperature Range(oC) | Commercial: 0 ~ +70 | Optical Components | 1310nm FP laser transmitter and PIN photo-detector |
Features
◇Achieve operational compatibility with conventional SFP
◇Hot-pluggable CSFP footprint
◇Low power dissipation
◇Metal enclosure, for lower EMI
◇RoHS compliant and lead-free
◇Support Digital Diagnostic Monitoring interface
◇Single +3.3V power supply
Applications
◇Switch to Switch Interface
◇Gigabit Ethernet
◇Point to Point FTTH Application
◇Switched Backplane Applications
◇Router/Server Interface
◇Other Optical Links
Electrical Characteristics
The following electrical characteristics are defined over the Recommended Operating Environment unless otherwise specified.
Parameter | Symbol | Min. | Typical | Max | Unit | Notes |
Power Consumption | 1.5 | W | ||||
Supply Current | Icc | 450 | mA | |||
Transmitter | ||||||
Single-ended Input Voltage Tolerance | -0.3 | 4.0 | V | |||
Differential Input Voltage Swing | Vin,pp | 200 | 2400 | mVpp | ||
Differential Input Impedance | Zin | 90 | 100 | 110 | Ohm | |
Transmit Disable Assert Time | 5 | us | ||||
Transmit Disable Voltage | Vdis | Vcc-1.3 | Vcc | V | ||
Transmit Enable Voltage | Ven | Vee-0.3 | 0.8 | V | ||
Receiver | ||||||
Differential Output Voltage Swing | Vout,pp | 500 | 900 | mVpp | ||
Differential Output Impedance | Zout | 90 | 100 | 110 | Ohm | |
Data output rise/fall time | Tr/Tf | 100 | ps | 20% to 80% | ||
LOS Assert Voltage | VlosH | Vcc-1.3 | Vcc | V | ||
LOS De-assert Voltage | VlosL | Vee-0.3 | 0.8 | V | ||
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SFP type and BiDi SFP type optical modules are very popular and widely used in optical communication while CSFP (Compact Small Form-Factor Pluggable) optical transceivers are relatively new. By using Compact SFP (cSFP) we can achieve double throughput in same SFP port by having 2 BiDi bidirectional streams of traffic, thus we can get 2xGE out from one SFP port.
Most commonly cSFP is used in Central Office/Aggregation site operating at Tx1&Tx2:1490nm Rx1&Rx2:1310nm and it gets connected to 2 CPE sites which have simple BiDi SFP operating in Tx:1310nm Rx:1490 at each site.
Compact SFP (CSFP) major application is to use it in FTTx scenario where we have (point-to-point) connections from Central Office/Aggregation Site to (CPE) Customer Premises Equipment. With help of CSFP we can double the Central Office/Aggregation Site port density (we can achieve 2xGE from one aggregation site port) and as well reduce power consumption in Central Office as we use 2 times less ports.
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