FSJMLB31-K20C(I)_25G SFP28_SFP光模块_产品中心

FSJMLB31-K20C(I)

SFP28 25Gb/s LR 20km DDM

产品特性：
Supports 25.78Gb/s aggregate bit rate
1310nm DFB Laser transmitter and PIN/TIA receiver
Maximum link length of 20km on
Single Mode Fiber (SMF)
Hot-pluggable SFP28 footprint
Duplex LC receptacles
Single +3.3V±5% power supply
Maximum power dissipation < 1.2W
Compliant with SFF-8472 & IEEE 802.3cc
Fully RoHS Compliant
Case operating temperature
Commercial: 0°C to +70°C
Industrial: -40°C to +85°C

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产品概述产品特性技术规格

产品概述

I. 引导图

Pinout of Connector Block on Host Board

II.引用说明

Pin	Symbol	Name/Description	Ref.
1	V EET	Transmitter Ground (Common with Receiver Ground)	1
2	T FAULT	Transmitter Fault.	2
3	T DIS	Transmitter Disable. Laser output disabled on high or open.	3
4	SDA	2-wire Serial Interface Data Line	4
5	SCL	2-wire Serial Interface Clock Line	4
6	MOD_ABS	Module Absent. Grounded within the module	4
7	RS0	No connection required
8	LOS	Loss of Signal indication. Logic “0” indicates normal operation.	5
9	RS1	No connection required
10	V EER	Receiver Ground (Common with Transmitter Ground)	1
11	V EER	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	V EER	Receiver Ground (Common with Transmitter Ground)	1
15	V CCR	Receiver Power Supply
16	V CCT	Transmitter Power Supply
17	V EET	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	V EET	Transmitter Ground (Common with Receiver Ground)	1

Notes:

1. Circuit ground is internally isolated from chassis ground.

2. TFAULT is an open collector/drain output, which is pulled up with a 4.7kΩ – 10kΩ resistor on the

host board, but is grounded inside the SFP+ cable plug.

3. Laser output disabled on TDIS >2.0V or open, enabled on TDIS <0.8V.

4. Should be pulled up with 4.7kΩ – 10kΩ on host board to a voltage between 2.0V and 3.6V.

MOD_ABS pulls line low to indicate module is plugged in.

5. LOS is open collector output. Should be pulled up with 4.7kΩ – 10kΩ on host board to a voltage

between 2.0V and 3.6V. Logic 0 indicates normal operation; logic 1 indicates loss of signal.

III. 极限参数

Parameter	Symbol	Min	Type	Max	Unit	Ref.
Maximum Supply Voltage	Vcc	-0.5		3.6	V
Storage Temperature	TS	-40		85	℃
Relative Humidity	RH	0		85	%

Notes:

1.Limited by the fiber cable jacket, not the activeends.

2.Non-condensing

IV. 光学特性

Parameter	Symbol	Min.	Typ.	Max.	Unit	Ref.
Transmitter
Signaling rate(range)	Sr		25.7825±100ppm		GBd
Center Wavelength	λc	1260		1355	nm
Optical Return Loss Tolerance				20	nm
Average Output Power	Pavg	-4		2	dBm
Optical Modulation Amplitude	TxOMA	-4			dBm
Extinction Ratio	ER	3.5			dB
Side Mode Suppression Ratio	SMSR	30			dB
Transmitter OFF Output Power	P_Off			-30	dBm
Transmitter and Dispersion Penalty	TDP			2.7	dB
Transmitter eye mask definition {X1, X2, X3, Y1, Y2, Y3} Hit ratio 5×10-5 hits per sample.		{0.31, 0.4, 0.45, 0.34, 0.38, 0.4}
Receiver
Signaling rate(range)	Sr		25.7825±100ppm		GBd
Center Wavelength	λc	1260		1355	nm
Receiver Sensitivity(OMA)	S_OMA			-12	dBm	1
Receiver Reflectance	Rfl			-26	dBm
Loss of Signal Assert	P_A	-30			dBm
Loss of Signal De-assert	P_D			-17	dBm
LOS Hysteresis	P_D- P_A	0.5			dB

Note:

1. 1. Measured at 25.78125Gb/s, ER>3.5dBm, PRBS 2 31 -1 and BER better than or equal to 5x10-5.

V. 数字诊断图

VI. 数字诊断监控信息

Parameter	Unit	Accuracy
Case Temperature	℃	±3
Supply Voltage	V	±3%
Tx Bias Current	mA	±10%
Tx Optical Power	dB	±3
Rx Optical Power	dB	±3

VII. 电气接口特性

Parameter	Symbol	Min	Type	Max	Unit	Ref.
Supply Voltage	Vcc	3.135	3.3	3.465	V
Supply Current	Icc			300	mA	Commercial
Supply Current	Icc			350	mA	Industrial
Transmitter
Input differential impedance	Rin		100		Ω	1
Single-ended Data Input Swing	Vin	90		450	mVp-p p
Transmit Disable Voltage	V_D	2		V_CCHOST	V
Transmit Enable Voltage	V_EN	Vee		Vee+0.8	V
Transmit Fault Assert Voltage	V_FA	2		V_CCHOST	V
Transmit Fault De-Assert Voltage	V_FDA	Vee		Vee+0.4	V
Receiver
Single-ended Data Output Swing	Vout	200		450	mVp-p	2
LOS Fault	V_{LOS_fault}	2		Vcc_HOST	V	3
LOS Normal	V_{LOS_norm}	Vee		Vee+0.4	V	3

Notes:

1. Connected directly to TX data input pins.AC coupling from pins into laser driver IC.

2. LOS is an open collector output. Should be pulled up with 4.7kΩ – 10kΩ on the host board. Normal operation is logic 0; loss of signal is logic 1. Maximum pull-up voltage is 5.5V.

VIII. 推荐接口电路

IX. 产品尺寸 (mm)

SFP wire mechanical drawing (Unit: mm)

产品特性

Supports 25.78Gb/s aggregate bit rate

1310nm DFB Laser transmitter and PIN/TIA receiver

Maximum link length of 20km on

Single Mode Fiber (SMF)

Hot-pluggable SFP28 footprint

Duplex LC receptacles

Single +3.3V±5% power supply

Maximum power dissipation < 1.2W

Compliant with SFF-8472 & IEEE 802.3cc

Fully RoHS Compliant

Case operating temperature

Commercial: 0°C to +70°C

Industrial: -40°C to +85°C

应用	标准
Data Center Backbone	SFP28 MSA.
Ethernet Switches	IEEE802.3cc
High-speed Servers	SFF-8431
High-performance Computing Clusters	SFF-8432

技术规格

Ordering Information

Package	Product part NO.	Distance	Temperature Range
FSJMLB31-K20C	25.78125	1310	20km
FSJMLB31-K20I	25.78125	1310	20km
*For availability of additional cable lengths, please contact Fibridge.