Key Features
✓Up to 1.25Gb/s data links
✓FP laser transmitter and PIN photo-detector
✓Up to 20km on 9/125µm SMF
✓Hot-pluggable SFP footprint
✓Duplex LC/UPC type pluggable optical interface
✓Low power dissipation
✓Metal enclosure, for lower EMI
✓RoHS compliant and lead-free
✓Single +3.3V power supply
✓Compliant with SFF-8472
✓Commercial Temp: 0°C to +70°C
✓Extended Temp: -10°C to +80°C
Applications
➔Switch to Switch Interface
➔Gigabit Ethernet
➔Switched Backplane Applications
➔Router/Server Interface
➔Other Optical Links
Product Specifications
| Product Part Number |
Data Rate (Mbps) |
Media |
Wavelength (nm) |
Distance (km) |
Temp Range (°C) |
Grade |
| KCO-SFP-1.25-SM-20C |
1250 |
Single mode fiber |
1310 |
20 |
0~70 |
Commercial |
| KCO-SFP-1.25-SM-20E |
1250 |
Single mode fiber |
1310 |
20 |
-10~80 |
Extended |
| KCO-SFP-1.25-SM-20A |
1250 |
Single mode fiber |
1310 |
20 |
-40~85 |
Industrial |
Pin Descriptions
| Pin |
Symbol |
Name/Description |
Note |
| 1 | VEET | Transmitter Ground | 1 |
| 2 | TFAULT | Transmitter Fault | |
| 3 | TDIS | Transmitter Disable. Laser output disabled on high or open. | 2 |
| 4 | MOD_DEF(2) | Module Definition 2. Data line for Serial ID. | 3 |
| 5 | MOD_DEF(1) | Module Definition 1. Clock line for Serial ID. | 3 |
| 6 | MOD_DEF(0) | Module Definition 0. Grounded within the module. | 3 |
| 7 | Rate Select | No connection required | 4 |
| 8 | LOS | Loss of Signal indication. Logic 0 indicates normal operation. | 5 |
| 9 | VEER | Receiver Ground | 1 |
| 10 | VEER | Receiver Ground | 1 |
| 11 | VEER | Receiver Ground | 1 |
| 12 | RD- | Receiver Inverted DATA out. AC Coupled | |
| 13 | RD+ | Receiver Non-inverted DATA out. AC Coupled | |
| 14 | VEER | Receiver Ground | 1 |
| 15 | VCCR | Receiver Power Supply | |
| 16 | VCCT | Transmitter Power Supply | |
| 17 | VEET | Transmitter Ground | 1 |
| 18 | TD+ | Transmitter Non-Inverted DATA in. AC Coupled. | |
| 19 | TD- | Transmitter Inverted DATA in. AC Coupled. | |
| 20 | VEET | Transmitter Ground | 1 |
Technical Notes:
1. Circuit ground is internally isolated from chassis ground.
2. Laser output disabled on TDIS >2.0V or open, enabled on TDIS <0.8V.
3. Should be pulled up with 4.7k - 10kohms on host board to a voltage between 2.0V and 3.6V. MOD_DEF (0) pulls line low to indicate module is plugged in.
4. Optional input for receiver bandwidth control. Low (0 – 0.8V): Reduced Bandwidth; High (2.0 – 3.465V): Full Bandwidth.
5. LOS is open collector output. Logic 0 indicates normal operation; logic 1 indicates loss of signal.
Frequently Asked Questions
What is the maximum data rate supported by this SFP module?
This SFP module supports high-speed data links up to 1.25Gb/s, making it ideal for Gigabit Ethernet applications.
What is the maximum transmission distance for this 1310nm SFP?
The module is designed for long-reach transmission, supporting distances up to 20km over 9/125µm Single Mode Fiber (SMF).
Is this transceiver hot-pluggable?
Yes, it features a hot-pluggable SFP footprint, allowing you to install or replace the module without powering down the host system.
What type of optical connector does it use?
The module is equipped with a Duplex LC/UPC type pluggable optical interface for secure and reliable fiber connections.
Does the module support industrial temperature ranges?
Yes, we offer different versions including Commercial (0°C to +70°C), Extended (-10°C to +80°C), and Industrial (-40°C to +85°C) to suit various environments.
Is the module compliant with industry standards?
The module is fully compliant with the SFF-8472 standard and is RoHS compliant and lead-free.
KOCENT OPTEC
