25.78Gbps 100m SFP+ Transceiver

Category: SFP/SFP+/SFP28

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25.78Gbps 100m SFP+ Transceiver

Model/PN: NASASFPP25GSR

Features

• Supports 25GBASE-SR(25Gb/s);
• Lane bit rate 25.78 Gb/s;
• Maximum link length of 70m on OM3 MMF and 100m on OM4 MMF;
• 850nm VCSEL laser and PIN photo-detector;
• High speed I/O electrical interface (25GAUI);
• I2C interface with integrated Digital Diagnostic monitoring;
• SFP28 MSA package with duplex LC connector;
• Maximum power consumption 1.0W
• Single +3.3V power supply;
• Operating case temperature: Refer to Order info.
• Compliant to IEEE 802.3cc Draft3.0, SFF-8402 and SFF-8432;
• Complies with EU Directive 2011/65/EU (RoHS 6/6);

Application

• 25GBase-SR
• CPRI

1. Product Description

NASASFPP25GSR compatible SFP28 transceiver adopts LC duplex connectors, reaching a link up to 100m over OM4 MMF (70m over OM3). The SFP28 transceiver module supports running on the same 1G/10G network cabling Infrastructure, giving 2.5 times increase in speed at least, and the built-in DDM/DOM functions monitor the real-time operating status. Each SFP28 transceiver module is individually tested on a series of Cisco, Juniper, Dell, HP, IBM…. switches, routers, servers, network interface card (NICs) etc, and is fully compliant with the SFP28 MSA, RoHS, CPRI, and the eCPRI standards. Featuring low power consumption, high speed, this 25G transceiver is ideal for 25G Ethernet, telecom, and data center.

2. Absolute Maximum Ratings

Parameter	Symbol	Min.	Typical	Max.
Storage Temperature	TS	-40	–	+85
Supply Voltage	VCC	-0.5	–	+4.0
Operating Relative Humidity	RH	–	–	+85

3. Recommended Operating Conditions

Parameter	Symbol	Min.	Typical	Max.	Unit
Operating Case Temperature NASASFP25GSR	TC	-5	–	+70	°C
Operating Case Temperature NASASFP25GSRI	TC	-40	–	+85	°C
Power Supply Voltage	VCC	3.13	3.3	3.47	V
Power Supply Current	ICC	–	–	0.28	A
Maximum Power Dissipation	PD	–	–	1.0	W
Lane Bit Rate	BRLANE	24.3	25.78	26.5	Gb/s
Transmission Distance(OM3)	TD			70	m
Transmission Distance(OM4)	TD			100	m

4. Optical Characteristics

Transmitter
Parameter	Symbol	Min.	Typical	Max.	Unit	Notes
Center Wavelength	λ0	840	850	860	nm
Average Launch Power	PTX_LANE	-8.4	–	2.4	dBm	1
Optical Modulation Amplitude	OMA	-6.4	–	3	dBm
Launch power in OMA minus TDP (min)	OMA_TDP	-7.3	–	–	dBm
Difference in launch power between lanes	PTX_DELTA_LANE	–	–	3.6	dB
Average Output Power (Laser Turn off)	P0UT-OFF	–	–	-30	dBm
Extinction Ratio	ER	2	–	–	dB
Transmitter and dispersion penalty (TDP)	TDP	–	–	4.3	dB
Optical Return Loss Tolerance	ORLT	–	–	12	dB
Optical Eye Mask	Compliant with IEEE 802.3cc Draft 3.0
Receiver
Center Wavelength	λ0	840	850	860	nm
Average Rx Power per Lane, 100GE	PRX _LANE	-10.3	–	2.4	dBm	2
Receiver sensitivity (OMA)	POMA_LANE	–	–	-5.2	dBm	2
Receiver Overload	PIN-OL	3.4	–	–	dBm
Reflectance	Ref	–	–	-12	dB
LOS Assert per lane	LOSA	-30	–	–	dBm
LOS De-assert	LOSD	–	–	-17	dBm
LOS Hysteresis	LOSH	0.5	–	4	dB

Notes:

Class 1 Laser Safety limit per FDA/CDRH, and EN (IEC) 60825 laser safety standards.
Informative Only

5. Electrical Characteristics

Transmitter (Module Input)
Parameter		Symbol	Min.	Typical	Max.	Unit	Notes
Differential Data Input Amplitude		VIN,P-P	90	–	800	mVpp
Differential Termination Mismatch			–	–	5	%
Tx_Disable	Normal Operation	VIL	-0.3	–	0.8	V
Tx_Disable	Laser Disable	VIH	2.0	–	VCC+0.3	V
Receiver (Module Output)
Differential Data Output Amplitude		VOUT,P-P	185	–	425	mVpp
Differential Termination Mismatch（1MHZ）			–	–	5	%
Output Rise/Fall Time, 20%~80%		TR	12	–	–	ps
Rx_LOS	Normal Operation	VOL	–	–	0.2	V
Rx_LOS	Lose Signal	VOH	VCC-0.2	–	–	V

6. Pin Description

Pin	Symbol	Description	Ref.
1	VEET	Transmitter Ground (Common with Receiver Ground)	7.1
2	TFAULT	Transmitter Fault. Not supported.
3	TDIS	Transmitter Disable. Laser output disabled on high or open.	7.2
4	MOD_DEF(2)	Module Definition 2. Data line for Serial ID.	7.3
5	MOD_DEF(1)	Module Definition 1. Clock line for Serial ID.	7.3
6	MOD_DEF(0)	Module Definition 0. Grounded within the module.	7.3
7	RS0	Rate Select0, optionally controls SFP+ module receiver. When high input signaling rate>4.25 GBd and when low input signaling rate<4.25GBd
8	LOS	Loss of Signal indication. Logic 0 indicates normal operation.	7.4
9	RS1	Rate Select1, optionally controls SFP+ module receiver. When high input signaling rate>4.25 GBd and when low input signaling rate<4.25GBd
10	VEER	Receiver Ground (Common with Transmitter Ground)	7.1
11	VEER	Receiver Ground (Common with Transmitter Ground)	7.1
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)	7.1
15	VCCR	Receiver Power Supply
16	VCCT	Transmitter Power Supply
17	VEET	Transmitter Ground (Common with Receiver Ground)	7.1
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)	7.1

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 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.

7. EEPROM & DDM THRESHOLD

7.1 EEPROM

2 wire address 1010000X (A0h)

0~95

Serial ID Defined by SFP MSA (96 bytes)

96~127

Vendor Specific (32 bytes)

128~255

Reserved (128 bytes)

7.2 DDM THRESHOLD

	Low Alarm	Low Warn	High Warn	High Alarm
Temperature NASASFP25GSR	-10℃	-5℃	70℃	75℃
Voltage	3V	3.1V	3.5V	4V
Tx Bias	2mA	3mA	10mA	11mA
Tx Power	-9dBm	-6dBm	3dBm	3.5dBm
Rx Power	-13dBm	-10dBm	3dBm	3.5dBm

8. Mechanical Specifications

9. Label

NASA-SI offers label OEM design and print.

Label barcode supports code128 and 2D barcode

SIZE: 26mm*10.5mm

10. Warnings

Handling Precautions: This device is susceptible to damage as a result of electrostatic discharge (ESD). A static free environment is highly recommended. Follow guidelines according to proper ESD procedures.

Laser Safety: Radiation emitted by laser devices can be dangerous to human eyes. Avoid eye exposure to direct or indirect radiation.

11. Order Information