SFP-GE-SX 1.25Gb/s Short-Wavelength SFP Transceiver Data Sheet

Hot-Pluggable SFP footprint Up to 500m on 50/125μm MMF, 300m on 62.5/125μm MMF Metal enclosure for lower EMI Extended operation temperature range: -10℃ to 75℃

SFP-GE-SX SFP transceiver is a high performance and cost effective and short distances transceiver for serial optical data communication applications, The interface converters meet the SFP Multi-Source Agreement (MSA) specifications, This module is designed for multi-mode fiber operation at the wavelength of 850nm, The transmitter section incorporates an advance VCSEL, with temperature compensation and automatic power control circuit (APC). The receiver section incorporates an efficient GaAs/InP PIN photodiode, with AGC for wide dynamic range.

The transceiver is a duplex LC connector transceiver, designed for use in 1x / 2x FC and Gigabit Ethernet and to provide a IEEE-802.3z compliant link at 1.25Gbps applications. The transceiver are hot-pluggable, the characterization is performed in accordance with Bellcore specification TA-NWT-000983. All of them are housed in a stainless package and the combination produces a component of high reliability.

Absolute Maximum Ratings

Operation Environment

Electrical Characteristics

Transmitter Optical Characteristics:

(Ambient Operating Temperature Ta=-20°C to +85°C, Vcc = 3.0V to 3.6V)

Receiver Optical Characteristics:

(Ambient Operating Temperature Ta=-20°C to +85°C, Vcc = 3.0V to 3.6V)

Timing Characteristics

Block Diagram of Transceiver

Digital Diagnostic Functions

SFP-GE-SX SFP transceiver support the 2-wire serial communication protocol as defined in ther SFP MSA. It is very closely related to the EEPROM defined in the GBIC standard, with the same electrical specifications.

The standard SFP serial ID provides access to identification information that describes the transceiver’s capabilities, standard interfaces, manufacturer, and other information.

Additionally, the SFP transceivers provide a unique enhanced digital diagnostic monitoring interface, which allows real-time access to device operating parameters such as transceiver temperature, laser bias current, transmitted optical power, received optical power and transceiver supply voltage. It also defines a sophisticated system of alarm and warning flags, which alerts end-users when particular operating parameters are outside of a factory set normal range.

The SFP MSA defines a 256-byte memory map in EEPROM that is accessible over a 2-wire serial interface at the 8 bit address 1010000X (A0h). the digital diagnostic monitoring interface makes use of the 8 bit address 1010001X (A2h), so the originally defined serial ID memory map remains unchanged. The interface is identical to, and is thus fully back ward compatible with both the GBIC specification and the FP Multi-source Agreement.

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 EEPROM that are not write-protected. The negative edge clocks data from the SFP transceiver. The serial data signal (SDA, Mod Def2) is bi-directional for serial data transfer. The host uses DA 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

SFP-GE-SX transceiver can be used in host systems that require either internally or externally calibrated digital diagnostics.

PINOUT TABLE

General Specifications

GBIC Serial ID Memory Contents

Serail ID Memory Contents: (A2h)

Address	#Bytes	Name	Description
00-01	2	Temp High Alarm	MSB at low address
02-03	2	Temp Low Alarm	MSB at low address
04-05	2	Temp High Warning	MSB at low address
06-07	2	Temp Low Warning	MSB at low address
08-09	2	Voltage High Alarm	MSB at low address
10-11	2	Voltage Low Alarm	MSB at low address
12-13	2	Voltage High Warning	MSB at low address
14-15	2	Voltage Low Warning	MSB at low address
16-17	2	Bias High Alarm	MSB at low address
18-19	2	Bias Low Alarm	MSB at low address
20-21	2	Bias High Warning	MSB at low address
22-23	2	Bias Low Warning	MSB at low address
24-25	2	TX Power High Alarm	MSB at low address
26-27	2	TX Power Low Alarm	MSB at low address
28-29	2	TX Power High Warning	MSB at low address
30-31	2	TX Power Low Warning	MSB at low address
32-33	2	RX Power High Alarm	MSB at low address
34-35	2	RX Power Low Alarm	MSB at low address
36-37	2	RX Power High Warning	MSB at low address
38-39	2	RX Power Low Warning	MSB at low address
40-55	16	Reserved	Reserved for future monitored quantities
56-59	4	RX_PWR(4)	Single precision floating point calibration data-RX optical power Bit 7 of byte 56 is MSB. Bit o of byte 59 is LSB
60-63	4	RX_PWR(3)	Single precision floating point calibration data-RX optical power Bit 7 of byte 60 is MSB. Bit o of byte 63 is LSB
64-67	4	RX_PWR(2)	Single precision floating point calibration data-RX optical power Bit 7 of byte 64 is MSB. Bit o of byte 67is LSB
68-71	4	RX_PWR(1)	Single precision floating point calibration data-RX optical power Bit 7 of byte 68 is MSB. Bit o of byte 71 is LSB
72-75		RX_PWR(0)	Single precision floating point calibration data-RX optical power Bit 7 of byte 72 is MSB. Bit o of byte 75 is LSB
76-77	2	TX_I (Slope)	Fixed precision floating point calibration data – RX optical power. Bit 7 of byte 76 is MSB, bit o of byte 77 is LSB.
78-79	2	TX_I (Offest)	Fixed decimal(signed two complement) calibration data, bit 7 of byte 78 is MSB, bit 0 of byte 79 is LSB.
80-81	2	TX_PWR(Slope)	Fixed decimal (unsigned) calibration data, transmitter coupled output power. Bit 7 of byte 80 is MSB, bit 0 of byte 81 is LSB.
82-83	2	TX_PWR (Offset)	Fixed decimal (signed two complement) calibration data, transmitter coupled output power. bit 7 of byte82 is MSB, bit 0 of byte 83 is LSB.
84-85	2	T (Slope)	Fixed decimal (unsigned) calibration data, internal module temperature. Bit 7 of byte 84 is MSB, bit 0 of byte 85 is LSB.
86-87	2	T (Offset)	Fixed decimal (signed two complement) calibration data, internal module temperature. bit 7 of byte86 is MSB, bit 0 of byte 87 is LSB.
88-89	2	V (Slope)	Fixed decimal (unsigned) calibration data, internal module supply voltage. Bit 7 of byte 88 is MSB, bit 0 of byte 89 is LSB.
90-91	2	V (Offset)	Fixed decimal (signed two complement) calibration data, internal module supply voltage. bit 7 of byte90 is MSB, bit 0 of byte 91 is LSB.
92-95	4	Reserved	Reserved
96	All	Temperature MSB	Internally measured module temperature
97	All	Temperature LSB
98	All	Vcc MSB	Internally measured supply voltage in transceiver
99	All	Vcc LSB
100	All	TX_ Bias MSB	Internally measured TX Bias current
101	All	TX_ Bias LSB
102	All	TX Power MSB	Measured TX output optical Power
103	All	TX Power LSB
104	All	RX Power MSB	Measured RX input optical power
105	All	RX Power LSB
106	All	Reserved MSB	Reserved for 1^st future definition of digitized analog input
107	All	Reserved LSB
108	All	Reserved MSB	Reserved for 2^nd future definition of digitized analog input
109	All	Reserved LSB
110	Bit7	TX Disable state	Digital state of the TX Disable input Pin. Not supported
110	Bit6	Soft TX Disable	Read/write bit that allows software disable of laser. Not support
110	Bit5	Reserved
110	Bit4	RX Rate select state	Digital state of the SFP RX rate select input Pin. Not support
110	Bit3	Soft RX Rate select	Read /write bit that allows software RX rate select. Not support
110	Bit2	TX Fault	Digital state of the TX Fault output Pin.
110	Bit1	LOS	Digital state of the LOS output Pin.
110	Bit0	Data Ready	Indicates transceiver has achieved power up and data is ready
111	bit7-0	Reserved
112	Bit7	Temp High Alarm	Set when internal temperature exceeds high alarm level
112	Bit6	Temp Low Alarm	Set when internal temperature is below low alarm level
112	Bit5	Vcc High Alarm	Set when internal supply voltage exceeds high alarm level
112	Bit4	Vcc Low Alarm	Set when internal supply voltage is below low alarm level
112	Bit3	TX Bias High Alarm	Set when TX Bias current exceeds high alarm level
112	Bit2	TX Bias Low Alarm	Set when TX Bias current is below low alarm level
112	Bit1	TX Power high Alarm	Set when TX output optical power exceeds high alarm level
112	Bit0	TX Power Low Alarm	Set when TX output optical power is below low alarm level
113	Bit7	RX Power high Alarm	Set when RX Input optical power exceeds high alarm level
113	Bit6	RX Power Low Alarm	Set when RX Input optical power is below low alarm level
113	5-0	Reserved
114	7-0	Reserved
115	7-0	Reserved
116	Bit7	Temp High Warning	Set when internal temperature exceeds high Warning level
116	Bit6	Temp Low Warning	Set when internal temperature is below low Warning level
116	Bit5	Vcc High Warning	Set when internal supply voltage exceeds high Warning level
116	Bit4	Vcc Low Warning	Set when internal supply voltage is below low Warning level
116	Bit3	TX Bias High Warning	Set when TX Bias current exceeds high Warning level
116	Bit2	TX Bias Low Warning	Set when TX Bias current is below low Warning level
116	Bit1	TX Power high Warning	Set when TX output optical power exceeds high Warning level
116	Bit0	TX Power Low Warning	Set when TX output optical power is below low Warning level
117	Bit7	RX Power high Warning	Set when RX Input optical power exceeds high Warning level
117	Bit6	RX Power Low Warning	Set when RX Input optical power is below low Warning level
117	5-0	Reserved
118	7-0	Reserved
119	7-0	Reserved
120-127	8	Vendor specific	00h
128-255	128		Writable memory