Optical Module

25Gbps 10km Duplex LC SFP28 Transceiver

Description

The SFP28 transceivers are designed for use in 25-Gigabit Ethernet links up to 10km over Single Mode Fiber.

The transceivers are compatible with INF-8431 and SFF-8472. For further information, please refer to INF-8431 and SFF-8472.

product details

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Specification parameter

Name	25G single mode
Model number	ZHLP-1325G-10-R	Brand	Zhilian Hengtong
Package type	SFP28	Transmission rate	25G
Wave length	1310nm	Transmission distance	10km
Port	LC	Fiber type	9/125µm SMF
Laser type	DFB	Receiver type	PIN
Transmitted optical power	-5~+2dBm	Receiving sensitivity	-11.4dbm
Power	<1.32w	Receive overload	2dBm
Power dissipation		Extinction ratio	≥3DB
CDR (Clock Data Recovery)	support	FEC function
Commercial temperature	0~70℃	Agreement	INF-8431/SFF- 8472/IEEE802.3cc

Module Block Diagram

Features

* Supports 24.3Gbps to 28.1Gbps bit rates

* 1310nm DFB Laser and PIN photo-detector

* Up to 10km on 9/125µm SMF

* Duplex LC receptacle optical interface compliant

* Hot pluggable

* All-metal housing for superior EMI performance

* RoHS6 compliant (lead free)

* Operating case temperature:

Commercial: -5ºC to +70°C

Applications

* 25G Ethernet

* 25G Fibre Channel

Standards

* Compliant with INF-8431

* Compliant with SFF-8472

* Compatible with IEEE802.3cc

Recommended Operating Environment

Parameter		Symbol	Min.	Typical	Max.	Unit
Power Supply Voltage		V_CC	3.13	3.3	3.46	V
Power Supply Current		I_CC			400	mA
Operating Case Temperature	Commercial	T_C	-5		+70	°C
	Extended		-20		+80
	Industrial		-40		+85
Data Rate				25.78		Gbps

Electrical Characteristics

Parameter	Symbol	Min.	Typical	Max.	Unit	Note
Transmitter Section
Input Differential Impedance	R_in	90	100	110	Ω
Differential Data Input Swing	V_i_{n PP}	200		900	mV	1
Transmit Disable Voltage	V_D	V_cc – 1.3		V_cc	V
Transmit Enable Voltage	V_EN	V_ee		V_ee+ 0.8	V
Receiver Section
Differential Data Output Swing	V_out_PP	400		900	mV
LOS Fault	V_{los fault}	V_cc– 0.5		V_{cc_}_host	V	2
LOS Normal	V_{los nor}_m	V_ee		V_ee+0.5	V	2

Notes:

1. Connected directly to TX data input pins. AC coupling from pins into laser driver IC.

2. LOS is an open collector output. Should be pulled up with 4.7kΩ – 10kΩ on the host board. Normal operation is logic 0; loss of signal is logic 1.

Optical Parameters

Parameter	Symbol	Min.	Typical	Max.	Unit	Note
Transmitter Section
Centre Wavelength	λc	1295	1310	1325	nm
Spectral Width(-20dB)	Δλ			1	nm
Side Mode Suppression Ratio	SMSR	30			dB
Average Optical Power (avg.)	P_out	-5		+2.0	dBm	1
Laser Off Power	P_off	-	-	-30	dBm
Extinction Ratio	ER	3	-	-	dB	2
Relative Intensity Noise	RIN	-	-	-130	dB/Hz
Transmitter and Dispersion Penalty	TDP		-	2.7	dB
Optical Return Loss Tolerance		-	-	26	dB
Output Optical Eye	Compliant with IEEE802.3cc eye masks when filtered					2
Receiver Section
Receiver Center Wavelength	λc	1260	1310	1355	nm
Receiver in Average Power		-11.4		2	dBm
Receiver sensitivity(OMA)	Sen			-12	dBm	3
Los Assert	LOS_A	-26	-	-	dBm
Los Dessert	LOS_D	-	-	-17	dBm
Los Hysteresis	LOS_H	0.5	-	5	dB
Overload	P_in-max	-	-	2	dBm	3
Receiver Reflectance		-	-	-26	dB
Receiver Power (damage)		-	-	3	dBm

Notes:

1. The optical power is launched into 9/125µm SMF.

2. Measured with a PRBS 2³¹-1 test pattern @25.78Gbps.

3. Measured with a PRBS 2³¹-1 test pattern @25.78Gbps, ER=4dB, BER <10^-6.

Digital Diagnostic Memory Map (Compliant with SFF-8472)

The transceivers provide serial ID memory contents and diagnostic information about the present operating conditions by the 2-wire serial interface (SCL, SDA).

The diagnostic information with internal calibration or external calibration all are implemented, including received power monitoring, transmitted power monitoring, bias current monitoring, supply voltage monitoring and temperature monitoring.

The digital diagnostic memory map specific data field defines as following (For further information, please refer to SFF-8472).