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BIDISFP 1.25GTX1550/RX1310 20KM

Up to 1.25Gb/s data links Single LC connector Hot-pluggable SFP footprint 1550nm DFB laser transmitter 1310nm InGaAs PIN receiver RoHS compliant and Lead Free Up to 20km on 9/125um SMF Metal enclosure for lower EMI Single +3.3V power supply Low power dissipation <800mW Commercial and industrial operating temperature optional SFP MSA SFF-8074i Compliant

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SFP optical module

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Product Details

Product Features

Up to 1.25Gb/s data links Single LC connector

Hot-pluggable SFP footprint

1550nm DFB laser transmitter

1310nm InGaAs PIN receiver

RoHS compliant and Lead Free

Up to 20km on 9/125um SMF

Metal enclosure for lower EMI

Single +3.3V power supply

Low power dissipation <800mW

Commercial and industrial

operating temperature optional

SFP MSA SFF-8074i Compliant

Applications

Gigabit Ethernet

1x Fibre Channel

General

BIDISFP 1.25GTX1550/RX1310 20KM Small Form Factor Pluggable (SFP) transceivers are compatible with
the Small Form Factor Pluggable Multi-Sourcing Agreement (MSA). The SFP transceivers are high performance, cost effective modules supporting Gigabit Ethernet and 20km transmission distance with SMF. They are RoHS compliant and lead-free.

Product Selection

Part Number	Operating temperature	DDMI
BIDISFP 1.25GTX1550/RX1310 20KM	Commercial	No
BIDISFP 1.25GTX1550/RX1310 20KM	Commercial	Yes
BIDISFP 1.25GTX1550/RX1310 20KM	Industrial	No
BIDISFP 1.25GTX1550/RX1310 20KM	Industrial	Yes

Regulatory Compliance

ESD to the Electrical PINs: compatible with MIL-STD-883 Method 3015

ESD to the LC Receptacle: compatible with IEC 61000-4-2

Immunity compatible with IEC 61000-4-3

EMI compatible with FCC Part 15 Class B EN55022 Class B (CISPR 22B) VCCI Class B

Laser Eye Safety compatible with FDA 21CFR 1040.10 and 1040.11 EN60950, EN (IEC) 60825-1,2

RoHs compliant with 2002/95/EC 4.1&4.2 2005/747/EC

Pin	Symbol	Name/Description	Ref.
1	VeeT	Transmitter Ground (Common with Receiver Ground)	1
2	TX Fault	Transmitter Fault.
3	TX Disable	Transmitter Disable. Laser output disabled on high or open.	2
4	MOD_DEF(2)	Module Definition 2. Data line for Serial ID.	3
5	MOD_DEF(1)	Module Definition 1. Clock line for Serial ID.	3
6	MOD_DEF(0)	Module Definition 0. Grounded within the module.	3
7	Rate Select	No connection required
8	LOS	Loss of Signal indication. Logic 0 indicates normal operation.	4
9	VeeR	Receiver Ground (Common with Transmitter Ground)	1
10	VeeR	Receiver Ground (Common with Transmitter Ground)	1
11	VeeR	Receiver Ground (Common with Transmitter Ground)	1
12	RD-	Receiver Inverted DATA out. AC Coupled
13	RD+	Receiver Non-inverted DATA out. AC Coupled
14	VeeR	Receiver Ground (Common with Transmitter Ground)	1
15	VccR	Receiver Power Supply
16	VccT	Transmitter Power Supply
17	VeeT	Transmitter Ground (Common with Receiver Ground)	1
18	TD+	Transmitter Non-Inverted DATA in. AC Coupled.
19	TD-	Transmitter Inverted DATA in. AC Coupled.
20	VeeT	Transmitter Ground (Common with Receiver Ground)	1

Notes:

1. Circuit ground is internally isolated from chassis ground.

2. Laser output disabled on TX Disable >2.0V or open, enabled on TX Disable<0.8V.

3. Should be pulled up with 4.7k - 10kohms 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. LOS is open collector output. Should be pulled up with 4.7k - 10kohms on host board to a voltage between 2.0V and 3.6V. Logic 0 indicates normal operation; logic 1 indicates loss of signal.

Pin-out of Connector Block on Host Board

Recommend Circuit Schematic

Absolute Maximum Ratings

Parameter	Symbol	Min	Typ	Max	Unit	Ref.
Maximum Supply Voltage	Vcc	-0.5	-	+4.0	V
Storage Temperature	TS	-40	-	+85	°C
Operating Humidity	RH	5	-	95	%

Recommended Operating Conditions

Parameter	Symbol	Min	Typ	Max	Unit	Ref.
Power Supply Voltage	Vcc	3.13	3.30	3.47	V
Power Supply Current	Icc	-	-	250	mA
Case Operating Temperature	Tc	0	-	+70	°C	1
Case Operating Temperature	TI	-40	-	+85	°C	2
Data Rate(Gigabit Ethernet)	-	-	1.25	-	Gbps
9/125um G.652 SMF	Lmax	-	-	20	km

Notes:

1. For commercial class product.

2. For industrial class product.

Electrical Characteristics (TOP=25°C, Vcc=3.3Volts)

Parameter	Symbol	Min	Typ	Max	Unit	Ref.
Transmitter
Input differential impedance	Rin	-	100	-	Ω	1
Single ended data input swing	Vin, pp	250	-	1200	mV
TX Disable-High	-	Vcc – 1.3	-	Vcc	V
TX Disable-Low	-	Vee	-	Vee+ 0.8	V
TX Fault-High	-	Vcc-0.5	-	Vcc	V
TX Fault-Low	-	Vee	-	Vee+0.5	V
Receiver
Single ended data output swing	Vout, pp	300	400	800	mV	2
Data output rise time	tr	-	-	175	ps	3
Data output fall time	tf	-	-	175	ps	3
LOS-High	-	Vcc – 0.5		Vcc	V
LOS-Low	-	Vee		Vee+0.5	V

Notes:

1. AC coupled.

2. Into 100 ohm differential termination.

3. 20 – 80 %

Parameter	Symbol	Min	Typ	Max	Unit	Ref.
Transmitter
Output Opt. Power	PO	-9	-	-3	dBm	1
Optical Wavelength	λ	1530	1550	1570	nm
Spectral Width	σ	-	-	1	nm
Side Mode Suppression Ratio	SMSR	30	-	-	dB
Optical Rise/Fall Time	tr/tf	-	-	260	ps	2
Total Jitter	TJ	-	-	200	ps
Optical Extinction Ratio	ER	9	-	-	dB
Receiver
RX Sensitivity @1.25 Gb/s	RSENS	-	-	-25	dBm	3, 4
Maximum Received Power	RXMAX	-2	-	-	dBm
Optical Center Wavelength	λC	1275	1310	1350	nm
LOS De-Assert	LOSD	-	-	-26	dBm
LOS Assert	LOSA	-40	-	-	dBm
LOS Hysteresis	-	0.5	-	5	dB

Notes:

1. Class 1 Laser Safety.

2. Unfiltered, 20-80%. Complies with Gigabit Ethernet eye masks when filtered.

3. Measured with conformance signals defined in FC-PI-2 Rev. 10.0 specifications. 7 -10

4. Measured with PRBS 2 -1 at 10 BER.

Mechanical Specifications

SFP Small Form Factor Pluggable (SFP) transceivers are compatible with the dimensions defined by the SFP Multi-Sourcing Agreement (MSA).

EEPROM Information

EEPROM memory map specific data field description is as below:

Digital Diagnostic Monitoring Interface

Five transceiver parameter values are monitored. The following table defines the monitored parameter’s accuracy.

Parameter	Range	Accuracy	Calibration
Temperature	0 to +70°C (C)	±3°C	Internal
Temperature	-40 to +85°C (I)	±3°C	Internal
Voltage	2.97 to 3.63V	±3%	Internal
Bias Current	0 to 100mA	±10%	Internal
TX Power	-9 to -3dBm	±3dB	Internal
RX Power	-25 to -2dBm	±3dB	Internal

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FAQ

Listed below are answers to our most commonly asked questions. Don't see your question?Contact our customer service team. We would be glad to assist you.

What is an optical network terminal (ONT)? How does it differ from a regular modem?

An optical network unit (ONU) is an end device in a fiber optic network that converts optical signals transmitted via fiber optics into electrical signals (for use by routers, computers, and other devices), and vice versa.

What is the architecture of a fiber optic network (PON)?

Fiber optic networks typically use a passive optical network (PON) architecture, which is divided into three layers

What are the functions of the PON port and LAN port on an optical network terminal (ONT)?

PON port (fiber optic interface): Connects to the fiber optic cable entering the home and receives optical signals (usually SC/APC interface, blue square head).

Why does the optical network terminal need to register LOID/SN?

LOID (Logical Identifier) or SN (Serial Number) is the credential used by operators to bind user identities, and is used for OLT authentication of optical modems.

Optical modem dialing vs. router dialing: which is better?

Ordinary users: Optical modem dialing. Game/NAS users: Switch to bridge mode and dial up using a high-performance router.

How to determine whether the fiber optic signal is normal?

Check the optical modem indicator lights Log in to the optical modem management interface: Check the optical power (unit: dBm)

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