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155M CWDM 120km LC SFP Transceiver

155M CWDM 120km LC SFP Transceiver

Features

* Data-rate of 155Mbps operation

* 9 CWDM DFB wavelengths laser and PIN photodetector for 120km transmission

* Compliant with SFP MSA and SFF-8472 with duplex LC receptacle

* Digital Diagnostic Monitoring:

Internal Calibration or External Calibration

* Compatible with RoHS

* +3.3V single power supply

* Operating case temperature: 0 to +70°C/-40~85°C

Applications

* Gigabit Ethernet

* Fiber Channel

* Switch to Switch interface

* Switched backplane applications

* Router/Server interface

* Other optical transmission systems

Description

The SFP transceivers are high performance, cost effective modules supporting data-rate of 155Mbps and 120km transmission distance with SMF.

The transceiver consists of three sections: an uncooled CWDM DFB laser transmitter, a PIN photodiode integrated with a trans-impedance preamplifier (TIA) and MCU control unit. All modules satisfy class I laser safety requirements.

The transceivers are compatible with SFP Multi-Source Agreement (MSA) and SFF-8472. For further information, please refer to SFP MSA.

Absolute Maximum Ratings

Table 1 - Absolute Maximum Ratings

Parameter	Symbol	Min	Max	Unit
Supply Voltage	Vcc	-0.5	4.5	V
Storage Temperature	Ts	-40	+85	°C
Operating Humidity	-	5	95	%

Recommended Operating Conditions

Table 2 - Recommended Operating Conditions

Parameter		Symbol	Min	Typical	Max	Unit
Operating Case Temperature	Standard	Tc	0		+70	°C
Power Supply Voltage		Vcc	3.13	3.3	3.47	V
Power Supply Current		Icc			300	mA
Data Rate				155		Mbps

Table3 -λC Wavelength Guide

λC Wavelength Guide
Code	λC	Unit	Code	λC	Unit
45	1450	nm	55	1550	nm
47	1470	nm	57	1570	nm
49	1490	nm	59	1590	nm
51	1510	nm	61	1610	nm
53	1530	nm

Table 4 - Optical and Electrical Characteristics

Parameter		Symbol		Min	Typical	Max	Unit	Notes
Transmitter
Centre Wavelength			λc	λc-6.5	λc	λc+6.5	nm
Spectral Width (-20dB)			∆λ			1	nm
Side Mode Suppression Ratio			SMSR	30			dB
Average Output Power			Pout	0		5	dBm	1
Extinction Ratio			ER	10			dB
Jitter Generation (RMS)						0.01	UI
Jitter Generation (PK-PK)						0.1	UI
Output Optical Eye			Compliant Telcordia GR-253-CORE and ITU-T G.957
Optical Rise/Fall Time (20%~80%)			tr/tf			0.26	ns
Data Input Swing Differential			V_IN	300		1860	mV	2
Input Differential Impedance			Z_IN	90	100	110	Ω
TX Disable	Disable			2.0		Vcc	V
TX Disable	Enable			0		0.8	V
TX Fault	Fault			2.0		Vcc	V
TX Fault	Normal			0		0.8	V
Receiver
Centre Wavelength			λc	1260		1620	nm
Receiver Sensitivity						-34	dBm	3
Receiver Overload				-10			dBm	3
LOS De-Assert			LOS_D			-38	dBm
LOS Assert			LOS_A	-45			dBm
LOS Hysteresis				1		4	dB
Data Output Swing Differential			Vout	370		1800	mV	4
LOS			High	2.0		Vcc	V
LOS			Low	0		0.8	V

Notes:

The optical power is launched into SMF.
PECL input, internally AC-coupled and terminated.
Measured with a PRBS 2²³-1 test pattern @155Mbps, BER ≤1×10^-12.
Internally AC-coupled.

Timing and Electrical

Table 5 - Timing and Electrical

Parameter	Symbol	Min	Typical	Max	Unit
Tx Disable Negate Time	t_on			1	ms
Tx Disable Assert Time	t_off			10	µs
Time To Initialize, including Reset of Tx Fault	t_init			300	ms
Tx Fault Assert Time	t_fault			100	µs
Tx Disable To Reset	t_reset	10			µs
LOS Assert Time	t_loss_on			100	µs
LOS De-assert Time	t_loss_off			100	µs
Serial ID Clock Rate	f_serial_clock			400	KHz
MOD_DEF (0:2)-High	V_H	2		Vcc	V
MOD_DEF (0:2)-Low	V_L			0.8	V

EEPROM Information

The SFP MSA defines a 256-byte memory map in EEPROM describing the transceiver’s capabilities, standard interfaces, manufacturer, and other information, which is accessible over a 2 wire serial interface at the 8-bit address 1010000X (A0h). The memory contents refer to Table 6.

Table 6 - EEPROM Serial ID Memory Contents (A0h)

Addr.	Field Size (Bytes)	Name of Field	Hex	Description
0	1	Identifier	03	SFP
1	1	Ext. Identifier	04	MOD4
2	1	Connector	07	LC
3—10	8	Transceiver	00 08 04 00 00 00 00 00	OC-3,Single mode long reach
11	1	Encoding	03	NRZ
12	1	BR, nominal	02	155Mbps
13	1	Reserved	00
14	1	Length (9um)-km	78	120km
15	1	Length (9um)	FF	120km
16	1	Length (50um)	00
17	1	Length (62.5um)	00
18	1	Length (copper)	00
19	1	Reserved	00
20—35	16	Vendor name	47 69 67 61 BT 69 67 68 74 20 20 20 20 20 20 20	"BTON"
36	1	Reserved	00
37—39	3	Vendor OUI	00 00 00
40—55	16	Vendor PN	47 50 43 2D 34 35 30 33 2D 31 32 43 44 20 20 20	“BT-OC3-120xxxx”(ASCⅡ)
56—59	4	Vendor rev	xx xx xx xx	xx.xx revision (ASCⅡ)
60-61	2	Wavelength	05 AA	1450nm
62	1	Reserved	00
63	1	CC BASE	xx	Check sum of bytes 0 - 62
64—65	2	Options	00 1A	LOS,TX_FAULT and TX_DISABLE
66	1	BR, max	00
67	1	BR, min	00

68—83	16	Vendor SN	xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx	ASCⅡ
84—91	8	Vendor date code	xx xx xx xx xx xx 20 20	Year(2 bytes),Month(2 bytes),Day(2 bytes)
92	1	Diagnostic type	xx	Diagnostics
93	1	Enhanced option	80	Diagnostics(Optional Alarm/warning flags)
94	1	SFF-8472	01	Diagnostics(SFF-8472 Rev 9.3)
95	1	CC EXT	xx	Check sum of bytes 64 - 94
96—255	160

Diagnostics

Table 7 – Diagnostics Specification

Parameter	Range	Unit	Accuracy	Calibration
Temperature	0 to +70	°C	±3°C	Internal / External
Voltage	3.0 to 3.6	V	±3%	Internal / External
Bias Current	0 to 100	mA	±10%	Internal / External
TX Power	0 to +5	dBm	±3dB	Internal / External
RX Power	-33 to -9	dBm	±3dB	Internal / External

Ordering information

Part Number	Product Description
BT-OC3-120xxxx	155Mbps CWDM 120km LC SFP 0~70℃

xxxx= Wavelength 1270~1610nm, with a 20nm step.