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1.25Gbps Tx1310/Rx1490nm 20km SFP Bi-Directional Transceiver

1.25Gbps Tx1310/Rx1490nm 20km SFP Bi-Directional Transceiver

Features

Single Mode bi-directional Transmission
SFP Multi-source Package with LC Receptacle
Up to 1.25Gb/s Data Links
Hot-Pluggable Capability
Up to 20 km on 9/125μm SMF
Single +3.3V Power Supply
Built-in WDM
Isolation > 30dB, Cross Talk < -45dB
Monitoring Interface Compliant with SFF-8472
Metal Enclosure, Excellent EMI & ESD Protection
Compliant with Specifications for IEEE802.3Z
Compliant with Bellcore TA-NWT-000983
Eye Safety Designed to Meet Laser Class1, Compliant with IEC60825-1
RoHS Compliant

Applications

Gigabit Ethernet
Fiber Channel
WDM Application

Description

The Bi-Directional transceiver is a high performance, cost effective module ,which is compliant with LC Optics interface with built in WDM for Bi-Directional serial optical data communication applications. This module is designed for Single-Mode single fiber, operates at the normal wavelength of 1310/1490nm.

Standard AC coupled CML for high speed signal and LVTTL control and monitor signals.

The transmitter section incorporates FP and driver IC with temperature compensation and automatic power control circuit, which make the transmitter section output power and Extinction ration stabled in operation temperature.

The receiver section incorporates an efficient InGaAs photodiode and transimpedance with AGC for wide dynamic range.

Absolute Maximum Ratings

Parameter		Symbol	Min.	Typical	Max.	Unit
Storage Temperature		T_S	-40		+85	°C
Supply Voltage		V_CCT, R	-0.5		4	V
Relative Humidity		RH	0		85	%
Case Operating Temperature	Industrial	Top	-40		85	C
	Extended		-5		85
	Commercial		0		70

Recommended Operating Environment:

Parameter		Symbol	Min.	Typical	Max.	Unit
Case operating Temperature	Industrial	T_C
	Extended
	Commercial		0		+70	°C
Supply Voltage		V_{CCT, R}	3.0		3.6	V
Power Supply Rejection			100			mV_P-P

Electrical Characteristics(T_OP = 0 to 70 °C, VCC = 3.0 to 3.60 Volts)

Parameter	Symbol	Min.	Typical	Max.	Unit	Note
Supply Voltage	Vcc	3.0	3.30	3.60	V
Supply Current	Icc		160	280	mA
Inrush Current	I_surge			Icc+30	mA
Maximum Power	P_max			1.0	W
Transmitter Section:
Input differential impedance	R_in	90	100	110		
Single ended data input swing	V_i_{n PP}	200		1200	mVp-p
Transmit Disable Voltage	V_D	Vcc – 1.3		Vcc	V	2
Transmit Enable Voltage	V_EN	Vee		Vee+ 0.8	V
Transmit Disable Assert Time	T_dessert			10	us
Receiver Section:
Single ended data output swing	Vout,pp	300		1000	mv	3
Data output rise time	t_r			150	ps	4
Data output fall time	t_f			150	ps	4
LOS Fault	V_losfault	Vcc – 0.5		V_{CC_}_host	V	5
LOS Normal	V_{los nor}_m	V_ee		V_ee+0.5	V	5
Power Supply Rejection	PSR	100			mVpp	6
Deterministic Jitter Contribution	RXΔDJ			51.7	ps	7
Total Jitter Contribution	RXΔTJ			122.4	ps

Note:

AC coupled.
Or open circuit.
Into 100 ohm differential termination.
20 – 80 %
LOS is LVTTL. Logic 0 indicates normal operation; logic 1 indicates no signal detected.
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.
Measured with DJ-free data input signal. In actual application, output DJ will be the sum of input DJ and . DJ.

Optical Parameters(T_OP = 0 to 70 °C, VCC = 3.0 to 3.60 Volts)

Parameter	Symbol	Min.	Typical	Max.	Unit	Note
Transmitter Section:
Center Wavelength	λ_c	1270	1310	1360	nm	1
Spectral Width	σ			3	nm
Optical Output Power	P_out	-9		-3	dBm	2
Optical Rise/Fall Time	t_r / t_f			160	ps	3
Extinction Ratio	ER	9			dB
Deterministic Jitter Contribution	TXΔDJ			56.5	ps	4
Total Jitter Contribution	TXΔTJ			119	ps
Eye Mask for Optical Output	Compliant with Eye Mask Defined in IEEE 802.3 standard
Relative Intensity Noise	RIN			-120	dB/Hz
Receiver Section:
Optical Input Wavelength		1480	1490	1500	nm
Optical Input Power	P_in	-23		-3	dBm	5.6
Receiver Reflectance		12			dB
Receiver Overload	P_ol			-3	dBm	5.6
RX Sensitivity	Sen			-23	dBm	5.6
RX_LOS Assert	LOS_A	-34			dBm
RX_LOS Deassert	LOS_D			-24	dBm
RX_LOS Hysteresis	LOS _H		2	2.5	dB
General Specifications
Data Rate	BR	1062		1250	Mb/s
Bit Error Rate	BER			10^-12
Max. Supported Link Length on 9/125μm SMF@1.25G	LMAX			20	km	7
Total System Budget	LB	14			dB	8

Note

Also specified to meet curves in FC-PI 13.0 Figures 18 and 19, which allow trade-off between wavelength spectral width.
Class 1 Laser Safety per FDA/CDRH and EN (IEC) 60825 regulations.
Unfiltered, 20-80%. Complies with IEEE 802.3 (Gig. E), FC 1x and 2x eye masks when filtered.
Measured with DJ-free data input signal. In actual application, output DJ will be the sum of input DJ and . DJ.
Measured with conformance signals defined in FC-PI 13.0 specifications.
Measured with PRBS 2^7-1 at 10^-12 BER
Dispersion limited per FC-PI Rev. 13
.Attenuation of 0.45 dB/km is used for the link length calculations. Distances are indicative only. Please refer to the Optical Specifications in Table IV to calculate a more accurate link budget based on specific conditions in your application.

Digital Diagnostic Monitor Characteristics

The following digital diagnostic characteristics are defined over the Recommended Operating Environment unless otherwise specified. It is compliant to SFF8472 Rev10.2 with internal calibration mode. For external calibration mode please contact our sales stuff..

Parameter	Symbol	Min.	Max.	Unit
Temperature monitor absolute error	DMI_Temp	-3	3	degC
Laser power monitor absolute error	DMI_TX	-3	3	dB
RX power monitor absolute error	DMI_RX	-3	3	dB
Supply voltage monitor absolute error	DMI_VCC	-0.1	0.1	V
Bias current monitor absolute error	DMI_Ibias	-10%	10%	mA

Figure 4. SFP Host Board Mechanical Layout(Cont)

Pin Description:

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:

Circuit ground is internally isolated from chassis ground.
Laser output disabled on TDIS >2.0V or open, enabled on TDIS <0.8V.
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.
Rate select is not used
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.
AC Coupled

Serial ID Memory Contents:

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	Gigabit Ethernet 1000Base-BX
11	1	Encoding	8B10B (01h)
12	1	BR,Nominal	Nominal baud rate, unit of 100Mbps
13	1	Reserved	(0000h)
14	1	Length(9um,km)	Link length supported for 9/125um fiber, units of km
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:
36	1	Reserved
37-39	3	Vendor OUI	SFP transceiver vendor OUI ID
40-55	16	Vendor PN	Part Number: “BTxxxxx” (ASCII)
56-59	4	Vendor rev	Revision level for part number
60-61	2	Wavelength	Laser wavelength
62	1	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	Manufacturing date code
92	1	Diagnostic Type	Diagnostics
93	1	Enhanced Options	Diagnostics
94	1	SFF-8472	Diagnostics
95	1	CCEX	Check code for the extended ID Fields (addr. 64 to 94)
Vendor Specific ID Fields
96-127	32	Readable	Vendor specific date, read only

Diagnostics Memory Contents(A2h):

Data Address	Length (Byte)	Name of Length	Description and Contents
Diagnostic and control/status fields
0-39	40	A/W Thresholds	Diagnostic Flag Alarm and Warning Thresholds
40-55	16	Unallocated
56-91	16	Ext Cal Constants	Diagnostic calibration constants for optional External Calibration
92-94	3	Unallocated
95	1	CC_DMI	Check code for Base Diagnostic Fields (addresses 0 to 94)
96-105	10	Diagnostics	Diagnostic Monitor Data (internally or externally calibrated)
106-109	4	Unallocated
110	1	Status/Control	Optional Status and Control Bits
111	1	Reserved	Reserved for SFF-8079
112-113	2	Alarm Flags	Diagnostic Alarm Flag Status Bits
114-115	2	Unallocated
116-117	2	Warning Flags	Diagnostic Warning Flag Status Bits
118-119	2	Ext Status/Control	Extended module control and status bytes
General use fields
120-127	8	Vendor Specific	Vendor specific memory addresses
128-247	120	User EEPROM	User writable non-volatile memory
248-255	8	Vendor Control	Vendor specific control addresses

Ordering information

Part Number	Product Description
BT-OC24-20A+	1.25Gbps Tx1310/Rx1490nm 20km LC DDM SFP 0°C~+70°C
BT-OC24-20AS+	1.25Gbps Tx1310/Rx1490nm 20km SC DDM SFP 0°C~+70°C
BT-OC24-20AI+	1.25Gbps Tx1310/Rx1490nm 20km LC DDM SFP -40°C~+85°C
BT-OC24-20ASI+	1.25Gbps Tx1310/Rx1490nm 20km SC DDM SFP -40°C~+85°C