Optical Module

1.25Gbps 550m Duplex LC SFP Transceiver

Description

We are pleased to introduce high-quality, affordable SFP optical modules designed to support data rates of 1.25Gbps and transmission distances of 550 meters over multimode fiber (MMF). The transceiver is fully compatible with the SFP Multi-Source Agreement (MSA) and SFF-8472 standards. For more details, see the SFP MSA and SFF-8472 documentation.

We believe our SFP optical modules will meet and exceed your expectations for performance and reliability. If you have any questions or would like to discuss your specific needs, please feel free to contact us.

Thank you for considering our products.

product details

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Specification parameter

Name	1G multimode
Model number	ZHLS-8512-02	Brand	Zhilian Hengtong
Package type	SFP	Transmission rate	1.25G
Wave length	850nm	Transmission distance	550m
Port	LC	Fiber type	50/125µm MMF
Laser type	VCSEL	Receiver type	PIN
Transmitted optical power	-9~-3dBm	Receiving sensitivity	-18dbm
Power	<0.99W	Receive overload	-3dBm
Power dissipation		Extinction ratio	≥9DB
CDR (Clock Data Recovery)		FEC function
Commercial temperature	0~70℃	Agreement	SFP MSA/ SFF-8472/ IEEE802.3ah 2004

Module Block Diagram

Features

* Data link up to 1.25Gbps

* 850nm VCSEL laser and PIN photo-detector

* Up to 550 meters on 50/125µm MMF

* Duplex LC socket optical interface compatible

* Hot-swappable

* Full metal casing with excellent EMI performance

* Compliant with RoHS6 standards (lead-free)

* Working box temperature:

Commercial: -5°C to +70°C

Applications

* Gigabit Ethernet

* Fiber Channel

* Switch to Switch interface

* Switched backplane applications

* Router/Server interface

* Other optical transmission systems

Standards

* SFP MSA support

* conforms to SFF-8472

* Compatible with IEEE802.3ah 2004

Recommended Operating Environment

Parameter		Symbol	Min.	Typical	Max.	Unit
Power Supply Voltage		VCC	3.13	3.3	3.46	V
Power Supply Current		Icc			300	mA
Operating Case Temperature	Commercial	TC	-5		+70	。C
	Extended		-20		+80
	Industrial		-40		+85
Data Rate				1.25		Gbps

Electrical Characteristics

Parameter	Symbol	Min.	Typical	Max.	Unit	Note
Transmitter Section
Input Differential Impedance	Rin	90	100	110	Ω
Single Ended Data Input Swing	Vin PP	250		1000	mV	1
Transmit Disable Voltage	VD	Vcc – 1.3		Vcc	V
Transmit Enable Voltage	VEN	Vee		Vee+ 0.8	V
Receiver Section
Single Ended Data Output Swing	Vout PP	300		600	mV
LOS Fault	Vlos fault	Vcc – 0.5		Vcc_host	V	2
LOS Normal	Vlos norm	Vee		Vee+0.5	V	2

Notes:

1. Connect directly to the TX data input pin. AC coupling from pin to laser driver IC.

2. LOS is an open collector output. It should be pulled up on the motherboard with 4.7kΩ - 10kΩ. Logic 0 for normal operation; logic 1 for signal loss.

Optical Parameters

Parameter	Symbol	Min.	Typical	Max.	Unit	Note
Transmitter Section
Centre Wavelength	λc	830	850	860	nm
Spectral Width (RMS)	σ			0.85	nm
Average Optical Power (avg.)	Pout	-9		-3	dBm	1
Laser Off Power	Poff	-	-	-45	dBm
Extinction Ratio	ER	9	-	-	dB	2
Relative Intensity Noise	RIN	-	-	-128	dB/Hz
Optical Rise/Fall Time	tr / tf		-	260	ps	3
Optical Return Loss Tolerance		-	-	12	dB
Output Optical Eye	Compliant with IEEE802.3z eye masks when filtered					2
Receiver Section
Receiver Center Wavelength	λc	830		860	nm
Receiver Sensitivity in Average Power	Sen	-18		-3	dBm	4
Los Assert	LOSA	-35	-	-	dBm
Los Dessert	LOSD	-	-	-19	dBm
Los Hysteresis	LOSH	0.5	-	5	dB
Overload	Pin-max	-	-	-3	dBm	4
Receiver Reflectance		-	-	-12	dB
Receiver Power (damage)		-	-	0	dBm

Notes:

1. Optical power is emitted to 50/125µm MMF.

2. Measured using PRBS 2⁷-1 test mode @1.25Gbps.

3. Unfiltered 20 - 80%. Measured using PRBS 2⁷-1 test mode @1.25Gbps.

4. Using PRBS 2⁷ -1 test mode @1.25Gbps, ER=10dB, BER <10^-12

Timing Characteristics

Parameter	Symbol	Min.	Typical	Max.	Unit
TX_Disable Assert Time	t_off			10	us
TX_Disable Negate Time	t_on			1	ms
Time to Initialize Include Reset of TX_FAULT	t_init			300	ms
TX_FAULT from Fault to Assertion	t_fault			100	us
TX_Disable Time to Start Reset	t_reset	10			us
Receiver Loss of Signal Assert Time	TA , RX_LOS			100	us
Receiver Loss of Signal Deassert Time	Td, RX_LOS			100	us
Rate-Select Change Time	t_ratesel			10	us
Serial ID Clock Time	f_serial-clock			100	kHz