1.25Gb/s 1310nm Single-mode SFP Transceiver

Short Description:

Small Form Factor Pluggable (SFP) transceivers are compatible with the Small Form Factor Pluggable Multi-Sourcing Agreement (MSA). The transceiver consists of four sections: the LD driver, the limiting amplifier, the FP laser and the PIN photo-detector. The module data link up to 20km in 9/125um single mode fiber.

The optical output can be disabled by a TTL logic high-level input of Tx Disable. Tx Fault is provided to indicate that degradation of the laser. Loss of signal (LOS) output is provided to indicate the loss of an input optical signal of receiver or the link status with partner.

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Product Detail

Product Tags

Product 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
+ Case operating temperature
Commercial: 0°C to +70°C
Extended: -10°C to +80°C

Applications

+ Switch to Switch Interface

+ Gigabit Ethernet

+ Switched Backplane Applications

+ Router/Server Interface

+ Other Optical Links

Ordering information

Product part Number	Data Rate (Mbps)	Media	Wavelength (nm)	Transmission Distance(km)	Temperature Range（Tcase）（℃）
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 (Common with Receiver 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 (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. AC Coupled
13	RD+	Receiver Non-inverted DATA out. 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.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.This is an optional input used to control the receiver bandwidth for compatibility with multiple data rates (most likely Fiber Channel 1x and 2x Rates).If implemented, the input will be internally pulled down with > 30kΩ resistor. The input states are:
- Low (0 – 0.8V): Reduced Bandwidth
- (>0.8, < 2.0V): Undefined
- High (2.0 – 3.465V): Full Bandwidth
- Open: Reduced Bandwidth
5.LOS is open collector output should be pulled up with 4.7k - 10kohms on host board to a voltage between 2.0V and 3.6V. Logic 0 indicates normal operation; logic 1 indicates loss of signal.