SFP28 25G SFP28 SR Transceiver Sinovo Telecom

25.78 Gbps SFP28 SR Transceiver

SOSP-8525G-SR

(Preliminary)

			Description The SOSP-8525G-SRSFP28 SR Transceivers are designed for use in 25Gbps data rate over multimode fiber. They are compliant to IEEE802.3by, SFF-8472 Rev 12.2 and SFF-8402, and compatible with SFF-8432 and applicable portions of SFF-8431 Rev. 4.1. The optical transceiver is compliant per the RoHS Directive 2011/65/EU.

 

Specification

Absolute Maximum Ratings
Parameter	Symbol	Min	Typical	Max	Unit	Notes
Storage Temperature	TS	-40	-	85	ºC
Maximum Supply Voltage	VCC	-0.3	-	4	V
Relative Humidity	RH	0	-	85	%
Case Operating Temperature	TC	0	-	70	ºC

General Specifications
Parameter	Symbol	Min	Typical	Max	Unit	Notes
Data Rate	DR		25.78125		Gbps	+/-100ppm
Bit Error Rate	BER			5E(-5)
Fiber Length on 50/125μm OM3 MMF	L			70	m	1

Notes:

1. At 25.78Gb/s Ethernet data rate (IEEE 802.3by)

Pin Descriptions
Pin	Symbol	Name/Description	Ref.
1	VEET	Transmitter Ground (Common with Receiver Ground)	1
2	TXFAULT	Transmitter Fault.	2
3	TXDIS	Transmitter Disable. Laser output disabled on high or open.	3
4	SDA	2-wire Serial Interface Data Line (MOD-DEF2)	4
5	SCA	2-wire Serial Interface Clock (MOD-DEF1)	4
6	MOD_ABS	Module Absent, connected to VEET or VEER	4
7	RS0	NA	5
8	LOS	Loss of Signal indication. Logic 0 indicates normal operation.	6
9	RS1	NA	5
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. TXFAULT is an open collector/drain output, which should be pulled up with a 4.7k – 10k Ohms resistor on the host board if intended for use. Pull up voltage should be between 2.0V to Vcc + 0.3V. A high output indicates a transmitter fault caused by either the TX bias current or the TX output power exceeding the preset alarm thresholds. A low output indicates normal operation. In the low state, the output is pulled to <0.8V.

3. Laser output disabled on TXDIS >2.0V or open, enabled on TXDIS <0.8V.

4. Should be pulled up with 4.7k – 10kohms on host board to a voltage between 2.0V and 3.6V. MOD_ABS pulls line low to indicate module is plugged in.

5. Rate select is not applicable.

6. 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.

Electrical Specification
Parameter	Symbol	Min	Typical	Max	Units	Notes
Supply Voltage	Vcc	3.15		3.46	V
Supply Current	Icc			250	mA
Transmitter
Differential input impedance	Zin		100		Ohm
Differential input voltage amplitude	Vin	180		1600	mVp-p
Transmit Disable Voltage	Vd	2		Vcc	V
Transmit Enable Voltage	Ven	Vee		Vee+0.8	V
Receiver
Differential Output impedance	Zout		100		Ohm
Differential output voltage amplitude	Vout	370		850	mVp-p
LOS On	VIH	2.0		VCChost	V
LOS Off	VIL	Vee		Vee+0.8	V
Power Supply Rejection	PSR	TBD			mVp-p

Optical Specification
Parameter	Symbol	Min	Typical	Max	Units	Notes
Supply Voltage	Vcc	3.15		3.46	V
Transmitter
Average Output Power	Pout	-8.4		2.4	dBm	1
Optical Wavelength	λ	840		860	nm	1
Spectral Width(RMS)	σ			0.6	nm	1
Optical Modulation Amplitude	OMA	-6.4		3	dBm	1
Transmitter Dispersion Penalty	TDP			5	dB	2
Relative Intensity Noise	RIN			-128	dB/Hz
Extinction Ratio	ER	2			dB	1
Optical Return Loss Tolerance	RL			12	dB	1
Receiver
Stressed Receiver OMA Sensitivity	SENS			-5.2	dBm	1
Average Receiver Power	Prx	-10.3		2.4	dBm	1
Optical Center Wavelength	λc	840		860	nm	1
LOS De-Assert	LOSd			-13	dBm
LOS Assert	LOSa	-30			dBm
LOS Hysteresis	LOSh	0.5			dB

Notes:

1.     Per IEEE 802.3by

2.     Informative only

Digital Diagnostic Functions

TWO-WIRE INTERFACE FIELDS

The operating and diagnostics information is monitored and reported by a Digital Diagnostics Transceiver Controller (DDTC) inside the transceiver, which is accessed through a 2-wire serial interface. When the serial protocol is activated, the serial clock signal (SCL, Mod Def 1) is generated by the host. The positive edge clocks data into the SFP transceiver into those segments of the E2PROM that are not write-protected. The negative edge clocks data from the SFP transceiver. The serial data signal (SDA, Mod Def 2) is bi-directional for serial data transfer. The host uses SDA in conjunction with SCL to mark the start and end of serial protocol activation. The memories are organized as a series of 8-bit data words that can be addressed individually or sequentially.

For more information, please see the SFP MSA documentation.

Digital Diagnostic Specifications

Parameter	Symbol	Min	Max	Unit	Accuracy	Notes
Transceiver Case Temperature	ºC	0	70	ºC	±5℃
Transceiver Supply Voltage	V	3.15	3.46	V	±0.1V
Transmitter Bias Current	mA	0	12	mA	±10%
Transmitter Output Optical Power	dBm	-9	2.4	dBm	±3dB
Receiver Average Input Optical Power	dBm	-11	2.4	dBm	±3dB

Mechanical Specifications

Contact

Shenzhen Sinovo Telecom Co. Ltd

Website:www.sinovocorp.com  Email:sales@sinovocorp.com

Tel:+86(0)0755-3295 9919   Fax:+86(0)755 3295 9918

FactoryADD: 4~5F,NO.658,Meijing West Rd,Dalang Town, Dongguan City, Guangdong,China

Head Quarter:11/F,Taibang Technology Building,Gaoxin South 4th,Science and

Technology Park South,Nanshan,Shenzhen,China 518040