SFP28 25G SFP Fiber Optic Transceiver 850nm VCSEL Transmitter For Inter Rack Connectione

 

 

Description:

SH's SH001D is a very compact optical transceiver module converts 25Gbit/s serial PECL or CML electrical data into serial optical data compliant with the 25GBASE-SR standard. The SFP28 SR module electrical interface is compliant to SFI electrical specifications. The VCSEL transmitter and PIN receiver provide superior performance for Ethernet applications at up to 100m links on OM4 MMF.

The SFP+ Module compliant with SFF-8431, SFF-8432 and IEEE 802.3ae 25GBASE-LR. Digital diagnostics functions are available via a 2-wire serial interface, as specified in SFF-8472.

The fully SFP compliant form factor provides hot pluggability, easy optical port upgrades and low EMI emission.

 

l Absolute Maximum Ratings

Parameter	Symbol	Min.	Typical	Max.	Unit
Storage Temperature	TS	-40		+85	°C
Case Operating Temperature	TA	0		70	°C
Maximum Supply Voltage	Vcc	0		3.6	V
Relative Humidity	RH	5		95	%

 

l Electrical Characteristics (T_OP = 0 to 70 °C, VCC = 3.135 to 3.465 Volts)

Parameter	Symbol	Min.	Typical	Max.	Unit	Note
Supply Voltage	Vcc	3.135		3.465	V
Supply Current	Icc			300	mA
Power Consumption	P			1	W
Data Rate	R	-	25.8	28.05	Gb/s
Transmitter Section:
Input differential impedance	Rin		100		Ω	1
Tx Input Single Ended DC Voltage Tolerance (Ref VeeT)	V	-0.3		4	V
Differential input voltage swing	Vin,pp	180		700	mV	2
Transmit Disable Voltage	VD	2		Vcc	V	3
Transmit Enable Voltage	VEN	Vee		Vee+0.8	V
Receiver Section:
Single Ended Output Voltage Tolerance	V	-0.3		4	V
Rx Output Diff Voltage	Vo	300		900	mV
Rx Output Rise and Fall Time	Tr/Tf	9.5			ps	4
LOS Fault	VLOS fault	2		VccHOST	V	5
LOS Normal	VLOS norm	Vee		Vee+0.8	V	5

Note:

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

2. Per SFF-8431 Rev 3.0

3. Into 100 ohms differential termination.

4. 20%～80%

5. LOS is an open collector output. Should be pulled up with 4.7k – 10kΩ on the host board. Normal operation is logic 0; loss of signal is logic 1. Maximum pull-up voltage is 5.5V.

 

l Optical Characteristics (TOP = 0 to 70°C, VCC = 3.135 to 3.465 Volts)

Parameter	Symbol	Min.	Typical	Max.	Unit	Note
Transmitter Section:
Center Wavelength	λt	840	850	860	nm
spectral width	△λ			1	nm
Average Optical Power	Pavg	-8.4		+2.4	dBm	1
Optical Power OMA	Poma	-6.4	-1.5	3	dBm
Laser Off Power	Poff			-30	dBm
Extinction Ratio	ER	2.0			dB
Transmitter Dispersion Penalty	TDP			3.8	dB	TDB
Relative Intensity Noise	Rin			-128	dB/Hz	3
Optical Return Loss Tolerance				12	dB
Receiver Section:
Center Wavelength	λr	840	850	860	nm
Receiver Sensitivity(OMA)	Sen			-10.0	dBm	4
Stressed Sensitivity(OMA)	Sen2			-5.2	dBm	4
Los Assert	LOSA	-30		-	dBm
Los Dessert	LOSD			-11	dBm
Los Hysteresis	LOSH	0.5		5	dB
Overload	Sat	3.5			dBm	5
Receiver Reflectance	Rrx			-12	dB

Note:

1. Average power figures are informative only, per IEEE802.3ae.

2. TWDP figure requires the host board to be SFF-8431compliant. TWDP is calculated using the Matlab code provided in clause 68.6.6.2 of IEEE802.3ae.

3. 12dB reflection.

4. Conditions of stressed receiver tests per IEEE802.3ae. CSRS testing requires the host board to be SFF-8431 compliant.

5. Receiver overload specified in OMA and under the worst comprehensive stressed condition.

 

• Timing Characteristics

Parameter	Symbol	Min.	Typical	Max.	Unit
TX_Disable Assert Time	t_off			100	us
TX_Disable Negate Time	t_on			2	ms
Time to Initialize Include Reset of TX_FAULT	t_int			300	ms
TX_FAULT from Fault to Assertion	t_fault			1	ms
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 Chage Time	t_ratesel			10	us
Serial ID Clock Time	t_serial-clock			100	kHz

• Pin Function Definitions

PIN #	Name	Function	Notes
1	VeeT	Module transmitter ground	1
2	Tx Fault	Module transmitter fault	2
3	Tx Disable	Transmitter Disable; Turns off transmitter laser output	3
4	SDL	2 wire serial interface data input/output (SDA)	4
5	SCL	2 wire serial interface clock input (SCL)	4
6	MOD-ABS	Module Absent, connect to VeeR or VeeT in the module	2
7	RS0	Rate select0, optionally control SFP+ receiver. When high, input data rate >4.5Gb/ s; when low, input data rate <=4.5Gb/s
8	LOS	Receiver Loss of Signal Indication
9	RS1	Rate select0, optionally control SFP+ transmitter. When high, input data rate >4.5Gb/s; when low, input data rate <=4.5Gb/s
10	VeeR	Module receiver ground	1
11	VeeR	Module receiver ground	1
12	RD-	Receiver inverted data out put
13	RD+	Receiver non-inverted data out put
14	VeeR	Module receiver ground	1
15	VccR	Module receiver 3.3V supply
16	VccT	Module transmitter 3.3V supply
17	VeeT	Module transmitter ground	1
18	TD+	Transmitter non-inverted data out put
19	TD-	Transmitter inverted data out put
20	VeeT	Module transmitter ground	1

Note:

• The module ground pins shall be isolated from the module case.
• This pin is an open collector/drain output pin and shall be pulled up with 4.7K-10Kohms to Host_Vcc on the host board.
• This pin shall be pulled up with 4.7K-10Kohms to VccT in the module.
• This pin is an open collector/drain output pin and shall be pulled up with 4.7K-10Kohms to Host_Vcc on the host board.

​

• SFP Module EEPROM Information and Management

The SFP modules implement the 2-wire serial communication protocol as defined in the SFP -8472. The serial ID information of the SFP modules and Digital Diagnostic Monitor parameters can be accessed through the I²C interface at address A0h and A2h.

The memory is mapped in Table 1.

Detailed ID information (A0h) is listed in Table 2.

And the DDM specification at address A2h.

For more details of the memory map and byte definitions, please refer to the SFF-8472, “Digital Diagnostic Monitoring Interface for Optical Transceivers”. The DDM parameters have been internally calibrated.

 

 

 

Table 1 - EEPROM Serial ID Memory Contents (A0h)

 

Data Address	Length (Byte)	Name of Length	Description and Contents
Base ID Fields
0	1	Identifier	Type of Serial transceiver (03h=SFP)
1	1	Reserved	Extended identifier of type serial transceiver (04h)
2	1	Connector	Code of optical connector type (07=LC)
3-10	8	Transceiver	25G Base-LR
11	1	Encoding	64B/66B
12	1	BR, Nominal	Nominal baud rate, unit of 100Mbps
13-14	2	Reserved	(0000h)
15	1	Length(9um)	Link length supported for 9/125um fiber, units of 100m
16	1	Length(50um)	Link length supported for 50/125um fiber, units of 10m
17	1	Length(62.5um)	Link length supported for 62.5/125um fiber, units of 10m
18	1	Length(Copper)	Link length supported for copper, units of meters
19	1	Reserved
20-35	16	Vendor Name	SFP vendor name: SH
36	1	Reserved
37-39	3	Vendor OUI	SFP transceiver vendor OUI ID
40-55	16	Vendor PN	Part Number: “SH001D” (ASCII)
56-59	4	Vendor rev	Revision level for part number
60-62	3	Reserved
63	1	CCID	Least significant byte of sum of data in address 0-62
Extended ID Fields
64-65	2	Option	Indicates which optical SFP signals are implemented (001Ah = LOS, TX_FAULT, TX_DISABLE all supported)
66	1	BR, max	Upper bit rate margin, units of %
67	1	BR, min	Lower bit rate margin, units of %
68-83	16	Vendor SN	Serial number (ASCII)
84-91	8	Date code	SH’s Manufacturing date code
92-94	3	Reserved
95	1	CCEX	Check code for the extended ID Fields (addresses 64 to 94)
Vendor Specific ID Fields
96-127	32	Readable	SH specific date, read only
128-255	128	Reserved	Reserved for SFF-8079

 

Digital Diagnostic Monitor Characteristics

Data Address	Parameter	Accuracy	Unit
96-97	Transceiver Internal Temperature	±3.0	°C
98-99	VCC3 Internal Supply Voltage	±3.0	%
100-101	Laser Bias Current	±10	%
102-103	Tx Output Power	±3.0	dBm
104-105	Rx Input Power	±3.0*	dBm