25Gb/s SFP28 1310nm 80km Transceiver

The transceiver is ideal for 5G long-range pre-transmission, metro DCI, and low-cost, low-latency 80km transmission at 1310nm fixed wavelength + high power.

Specification

Resources

Features

Up to 25.78Gb/s data links

Single +3.3V power supply

Hot-pluggable SFP footprint

Class 1 laser safety certified

Up to 80km on 9/125um SMF

RoHS-10 compliant and lead-free

Support Digital Monitoring interface

1310nm DFB laser and PIN+SOA receiver

All-metal housing for superior EMI performance

2-wire interface for management specifications compliant with SFF-8472 digital diagnostic monitoring interface for optical transceivers

Cost effective SFP28 solution, enables higher port densities and greater bandwidth

Case operating temperature

Commercial: 0 ~ +70^oC Extended: -10 ~ +80^oC Industrial: -40 ~ +85^oC

Applications

25GBASE 80KM

Other Optical Links

High-speed storage area networks

Absolute Maximum Ratings

It has to be noted that the operation in excess of any individual absolute maximum ratings might cause permanent damage to this module.

Parameter	Symbol	Min	Max	Unit	Notes
Storage Temperature	TS	-40	85	oC
Power Supply Voltage	VCC	-0.5	3.6	V
Relative Humidity (non-condensation)	RH	5	95	%
Damage Threshold	THd	3		dBm

Recommended Operating Conditions and Power Supply Requirements

Parameter	Symbol	Min	Typical	Max	Unit	Notes
Operating Case Temperature	TOP	0		70	oC	commercial
Operating Case Temperature	TOP	-40		85	oC	Industrial
Power Supply Voltage	VCC	3.135	3.3	3.465	V
Data Rate			25.78		Gb/s
Control Input Voltage High		2		Vcc	V
Control Input Voltage Low		0		0.8	V
Link Distance (SMF)	D			80	km	9/125um

Pin Assignment and Pin Description

Figure1. Diagram of host board connector block pin numbers and names

PIN	Name	Name/Description	Notes
1	VeeT	Transmitter Ground	1
2	TX_Fault	Transmitter Fault
3	TX_Disable	Transmitter Disable; Turns off transmitter laser output
4	SDA	Two wire serial interface Data Line (LVCMOS-I/O) (MOD-DEF2)	2
5	SCL	Two wire serial interface Clock Line (LVCMOS-I/O) (MOD-DEF1)	2
6	MOD_ABS	Module Definition, Grounded in the module
7	RS0	Rate Select 0 – Not used
8	RX_LOS	Receiver Loss of Signal Indication Active LOW
9	RS1	Rate Select 1 – Not used
10	VeeR	Receiver Ground	1
11	VeeR	Receiver Ground	1
12	RD-	Receiver Inverted Data Output
13	RD+	Receiver Data Output
14	VeeR	Receiver Ground	1
15	VccR	Receiver Power - +3.3V
16	VccT	Transmitter Power - +3.3 V
17	VeeT	Transmitter Ground	1
18	TD+	Transmitter Non-Inverted Data Input
19	TD-	Transmitter Inverted Data Input
20	VeeT	Transmitter Ground	1

Notes:

1. Module ground pins GND are isolated from the module case.

2. Shall be pulled up with 4.7K-10Kohms to a voltage between 3.15V and 3.47V on the host board.

Electrical Characteristics

The following electrical characteristics are defined over the Recommended Operating Environment unless otherwise specified.

Parameter	Symbol	Min.	Typ.	Max	Unit	Notes
Power Consumption	p			3	W
Supply Current	Icc			865	mA
Transmitter
Single-ended Input Voltage Tolerance	Vcc	-0.3		4.0	V
Common mode voltage tolerance		15			mV
Differential Input Voltage Swing	Vin,pp	180		700	mVpp
Differential Input Impedance	Zin	90	100	110	Ohm	1
Transmit Disable Assert Time				100	us
Transmit Disable Voltage	Vdis	Vcc-1.3		Vcc	V
Transmit Enable Voltage	Ven	Vee		Vee +0.8	V	2
Receiver
Single-ended Input Voltage Tolerance	Vcc	-0.3		4.0	V
Differential Output Voltage Swing	Vout,pp	300		900	mVpp
Differential Output Impedance	Zout	90	100	110	Ohm	3
Data output rise/fall time	Tr/Tf	12			ps	4
LOS Assert Voltage	VlosH	Vcc-1.3		Vcc	V	5
LOS De-assert Voltage	VlosL	Vee		Vee +0.8	V	5

Notes:

Or open circuit.
These are unfiltered 20-80% values.
Input 100 ohms differential termination.
Connected directly to TX data input pins. AC coupled thereafter.
Loss of Signal is LVTTL. Logic 0 indicates normal operation; logic 1 indicates no signal detected.

Optical Characteristics

The following optical characteristics are defined over the Recommended Operating Environment unless otherwise specified.

Parameter	Symbol	Min.	Typical	Max	Unit	Notes
Transmitter
Center Wavelength	λC	1295	1310	1325	nm
Optical Spectral Width	∆λ			1	nm
Average Optical Power	PAVG	1		6	dBm	1
Side Mode Suppression Ratio	SMSR	30			dB
Optical Extinction Ratio	ER	6			dB
Transmitter OFF Output Power	Poff			-30	dBm
Optical Return Loss Tolerance	ORLT			20	dB
Transmitter reflectance	Tref			-26	dB
Transmitter Eye Mask	Compliant with IEEE802.3ae
Receiver
Center Wavelength	λC	1295	1310	1325	nm
Average Receive Power		-30		-7	dBm
Receiver Sensitivity (Average, each lane)	Sen1			-23	dBm	2
Receiver Sensitivity (Average, each lane)	Sen2			-29	dBm	3
Input Saturation Power (overload)	Psat	-7			dBm
LOS Assert	LOSA	-40			dBm
LOS De-assert	LOSD			-29	dBm
Damage Threshold	THd	-3			dBm
LOS Hysteresis	LOSH	0.5			dB

Notes:

1. λc refer to wavelength selection, and corresponds to approximately 0.8 nm.

2. Class 1 Laser Safety per FDA/CDRH and IEC-825-1 regulations.

3. Measured with Light source 1528.77~1563.86nm, ER=4dB; BER =<10^-12 @ PRBS=2^31-1 NRZ.

Digital Diagnostic Functions

The following digital diagnostic characteristics are defined over the Recommended Operating Environment unless otherwise specified. It is compliant to SFF-8472 Rev10.2 with internal calibration mode. For external calibration mode please contact our sales staff.

Parameter	Symbol	Min.	Max	Unit	Notes
Temperature monitor absolute error	DMI_ Temp	-3	3	oC	0~85C
Supply voltage monitor absolute error	DMI _VCC	-3	3	%	0~Vcc
RX power monitor absolute error	DMI_RX	-3	3	dB	-7~-30dBm
Bias current monitor error	DMI_ bias	-10	10	%	0~100mA
TX power monitor absolute error	DMI_TX	-3	3	dB	1~6dBm

Mechanical Dimensions

Figure2. Mechanical Outline

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Resources

25Gb/s SFP28 1310nm 80km Transceiver