for DELL SFP-1.25g-Sx Compatible 1000base-Sx SFP 850nm 550m Dom LC Mmf Transceiver Module

• Customization: Available
• Usage: Telephone, Computer, Workstation, Server, Mobile phone, Data Center
• Type: Data Transmission
• Model NO.: LAQ2-8855-SR
• Support Network: Ethernet, GPRS, Data, Voice
• Information content: Data, Voice, Message
• Certification: CE, ISO, RoHS, FCC
• Condition: New
• Transport Package: Blister Pack
• Trademark: Linksall
• Origin: China
• HS Code: 8517706000
• Production Capacity: 100, 000 Per Year

Product Description

1.25G 850nm 550m sfp transceiver module

Overview
1.25Gb/s 550m SFP Transceiver
Hot Pluggable, Duplex LC, +3.3V, 850nm, VCSEL, Multi-mode, DDM

Features:                                             

• Up to 1.25Gb/s Data Links
• Hot-Pluggable
• Duplex LC connector
• Up to 550m on 50/125μm MMF
• 850nm VCSEL laser transmitter

• Single +3.3V Power Supply
• Monitoring Interface Compliant with SFF-8472
• Maximum Power <1W

• Industrial /Extended/ Commercialoperating temperaturerange: -40°C to 85°C/-5°C to 85°C/-0°C to 70°C Version available
• RoHS compliant and Lead Free

Applications:

• Metro/Access Networks
• 1.25 Gb/s 1000Base-SX Ethernet
• 1×Fibre Channel

• Other Optical Links

Description:
Link-all's LAD24-T85S-SRTransceiver is a high performance, cost effective module which have a duplex LC optics interface. Standard AC coupled CML for high speed signal and LVTTL control and monitor signals.The receiver section usesa PIN receiver and the transmitter usesa 850 nm VCSEL laser, up to 9dB link budge ensure this module 1000Base Ethernet 550m application.
 

1. 1. Absolute Maximum Ratings

Parameter	Symbol	Min.	Typical	Max.	Unit
Storage Temperature	TS	-40		+85	°C
Supply Voltage	VCC	-0.5		4	V
Relative Humidity	RH	0		85	%

 

1. 1. Recommended Operating Environment:

Parameter		Symbol	Min.	Typical	Max.	Unit
CaseoperatingTemperature	Industrial	TC	-40		85	°C
	Extended		-5		85	°C
	Commercial		0		+70	°C
Supply Voltage		VCC	3.135		3.465	V
Supply Current		Icc			300	mA
Inrush Current		Isurge			Icc+30	mA
Maximum Power		Pmax			1	W

 

1. 1. Electrical Characteristics(T_OP = -40 to 85°C, VCC = 3.135 to 3.465 Volts)

Parameter	Symbol		Min.	Typical	Max.	Unit	Note
Transmitter Section:
Input differential impedance		Rin	90	100	110
Single ended data input swing		Vin PP	250		1200	mVp-p
Transmit Disable Voltage		VD	Vcc - 1.3		Vcc	V	2
Transmit Enable Voltage		VEN	Vee		Vee+ 0.8	V
Transmit Disable Assert Time		Tdessert			10	us
Receiver Section:
Single ended data output swing		Vout,pp	250		800	mv	3
LOS Fault		Vlosfault	Vcc - 0.5		VCC_host	V	5
LOS Normal		Vlos norm	Vee		Vee+0.5	V	5
Power Supply Rejection		PSR	100			mVpp	6

Note:

1. AC coupled.
2. Or open circuit.
3. Into 100 ohm differential termination.
4. 20 - 80 %
5. LOS is LVTTL. Logic 0 indicates normal operation; logic 1 indicates no signal detected.
6. All transceiver specifications are compliant with a power supply sinusoidal modulation of 20 Hz to 1.5MHz up to specified value applied through the power supply filtering network shown on page 23 of the Small Form-factor Pluggable (SFP) Transceiver Multi-Source Agreement (MSA), September 14, 2000.

 

1. 1. Optical Parameters(T_OP = -40 to 85°C, VCC = 3.135 to 3.465 Volts)

Parameter	Symbol	Min.	Typical	Max.	Unit	Note
Transmitter Section:
Center Wavelength	λc	840	850	860	nm
Spectral Width(RMS)	σRMS			0.85	nm
Optical Output Power	Pout	-9		-3	dBm	1
Extinction Ratio	ER	8.2			dB
Optical Rise/Fall Time	tr / tf			260	ps	2
Relative Intensity Noise	RIN			-120	dB/Hz
Output Eye Mask	Compliant with  IEEE802.3 z (class 1 laser safety)
Receiver Section:
Optical Input Wavelength	λc	770		860	nm
Receiver Overload	Pol	0			dBm	4
RX Sensitivity	Sen			-18	dBm	4
RX_LOS Assert	LOS A	-29			dBm
RX_LOS De-assert	LOS D			-19	dBm
RX_LOS Hysteresis	LOS H	0.5			dB
General Specifications:
Data Rate	BR		1.25		Gb/s
Bit Error Rate	BER			10^-12
Max. Supported Link Length on 50/125μm [email protected]/s	LMAX		550		m
Total System Budget	LB	8			dB

Note

1. The optical power is launched into MMF.
2. 20-80%.
3. Jitter measurements taken using Agilent OMNIBERT 718 in accordance with GR-253.
4. Measured with PRBS 2^7-1 at 10^-12 BER

 

1. 1. Pin Assignment

Diagram of Host Board Connector Block Pin Numbers and Name

Diagram of Host Board Connector Block Pin Numbers and Names
 

1. 1. Pin Function Definitions

Pin No	Name	Function	Plug Seq	Notes
1	VeeT	Transmitter Ground	1	1
2	TX Fault	Transmitter Fault Indication	3
3	TX Disable	Transmitter Disable	3	2
4	MOD-DEF2	Module Definition	2	3
5	MOD-DEF1	Module Definition 1	3	3
6	MOD-DEF0	Module Definition 0	3	3
7	Rate Select	Not Connected	3	4
8	LOS	Loss of Signal	3	5
9	VeeR	Receiver Ground	1	1
10	VeeR	Receiver Ground	1	1
11	VeeR	Receiver Ground		1
12	RD-	Inv. Received Data Out	3	6
13	RD+	Received Data Out	3	6
14	VeeR	Receiver Ground	3	1
15	VccR	Receiver Power	2	1
16	VccT	Transmitter Power	2
17	VeeT	Transmitter Ground	1
18	TD+	Transmit Data In	3	6
19	TD-	Inv. Transmit In	3	6
20	VeeT	Transmitter Ground	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 - 10 kohms 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. Rate select is not used
5. LOS is open collector output. Should be pulled up with 4.7k - 10 kohms on host board to a voltage between 2.0V and 3.6V. Logic 0 indicates normal operation; logic 1 indicates loss of signal.
6. AC Coupled

 

1. 1. SFPModuleEEPROM 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 specificationat 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. Digital Diagnostic Memory Map (Specific Data Field Descriptions)



Table 2 - 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
11	1	Encoding			NRZ(03h)
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: LINK-ALL
36	1	Reserved
37-39	3	Vendor OUI			SFP transceiver vendor OUI ID
40-55	16	Vendor PN			Part Number: "LAD24-T85S-SR" (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	LINK-ALL'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		LINK-ALL specific date, read only
128-255	128	Reserved		Reserved for SFF-8079

 

1. 1. Digital Diagnostic Monitor Characteristics

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

 

1. 1. Regulatory Compliance

The LAD24-T85S-SR complies with international Electromagnetic Compatibility (EMC) and international safety requirements and standards (see details in Table following).
 

Electrostatic Discharge (ESD) to the Electrical Pins	MIL-STD-883E Method 3015.7	Class 1(>1000 V)
Electrostatic Discharge (ESD) to the Duplex LC Receptacle	IEC 61000-4-2 GR-1089-CORE	Compatible with standards
Electromagnetic Interference (EMI)	FCC Part 15 Class B EN55022 Class B (CISPR 22B) VCCI Class B	Compatible with standards
Laser Eye Safety	FDA 21CFR 1040.10 and 1040.11 EN60950, EN (IEC) 60825-1,2	Compatible with Class 1 laser product.