25.78 Gbps SFP28 BIDI Transceiver, Side A (Upstream): TX 1270nm / RX 1330nm; Side B (Downstream): TX 1330nm / RX 1270nm, Simplex LC Industrial Grade (-40~85 ° C) Wide Temperature Module

Description

Features of SFP 10 25G BXD I

• Supports 24.3Gbps to 26.5Gbps bit rates
• 1270nm DFB Laser and PIN photo-detector for YSP28-B7320
• 1330nm DFB Laser and PIN photo-detector for YSP28-B3720
• Up to 20km on 9/125µmSMF
• Simplex LC receptacle optical interface compliant
• Hot pluggable
• All-metal housing for superior EMI performance
• RoHS6 compliant (lead free)
• Operating case temperature: Commercial: -5ºC to +70°C; Extended: -20ºC to +80°C; Industrial: -40ºC to +85°C

 

Applications

• 5G network: Connects AAU and DU, addressing the issue of scarce fiber resources;
• Metropolitan Area Network: Data transmission and access over medium to short distances;
• Data Center: 25G interconnection between high-density racks.

 

Standards

• Compliant with INF-8431
• Compliant with SFF-8472
• Compatible with IEEE802.3cc

 

Absolute Maximum Ratings

Parameter	Symbol	Min.	Typical	Max.	Unit
Power Supply Voltage	VCC	0		3.6	V
Storage Temperature	Ts	-40		+85	°C
Relative Humidity	RH	0		85	%
RX Input Average Power	Pmax	–		3	dBm

 

Recommended Operating Environment

Parameter		Symbol	Min.	Typical	Max.	Unit
Power Supply Voltage		VCC	3.13	3.3	3.46	V
Power Supply Current		ICC			400	mA
Operating Case Temperature	Commercial	TC	-5		+70	°C
	Extended		-20		+80
	Industrial		-40		+85
Data Rate				25.78		Gbps

Electrical Characteristics

Parameter	Symbol	Min.	Typical	Max.	Unit	Note
Transmitter Section
Input Differential Impedance	Rin	90	100	110	Ω
Differential Data Input Swing	Vin PP	200		900	mV	1
Transmit Disable Voltage	VD	Vcc – 1.3		Vcc	V
Transmit Enable Voltage	VEN	Vee		Vee+ 0.8	V
Receiver Section
Differential Data Output Swing	Vout PP	400		900	mV
LOS Fault	Vlos fault	Vcc – 0.5		Vcc_host	V	2
LOS Normal	Vlos norm	Vee		Vee+0.5	V	2

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.

 

Optical Parameters

Parameter	Symbol	Min.	Typical	Max.	Unit	Note
Transmitter Section
Centre Wavelength	λc	1260	1270	1280	nm	YSP28-B7320
		1320	1330	1340	nm	YSP28-B3720
Spectral Width(-20dB)	Δλ			1	nm
Side Mode Suppression Ratio	SMSR	30			dB
Average Optical Power (avg.)	Pout	0		+6.0	dBm	1
Laser Off Power	Poff	–	–	-30	dBm
Extinction Ratio	ER	3.5	–	–	dB	2
Relative Intensity Noise	RIN	–	–	-130	dB/Hz
Transmitter and Dispersion Penalty	TDP		–	2.7	dB
Optical Return Loss Tolerance		–	–	26	dB
Output Optical Eye	Compliant with IEEE802.3cc eye masks when filtered					2
Receiver Section
Receiver Center Wavelength	λc	1320	1330	1340	nm	YSP28-B7320
		1260	1270	1280	nm	YSP28-B3720
Receiver in Average Power		-14		2	dBm
Receiver sensitivity(OMA)	Sen			-14	dBm	3
Los Assert	LOSA	-26	–	–	dBm
Los Dessert	LOSD	–	–	-17	dBm
Los Hysteresis	LOSH	0.5	–	5	dB
Overload	Pin-max	–	–	2	dBm	3
Receiver Reflectance		–	–	-26	dB
Receiver Power (damage)		–	–	3	dBm

Notes:

1. The optical power is launched into 9/125µm SMF.
2. Measured with a PRBS 2³¹-1test pattern @25.78Gbps.
3. 3. Measured with a PRBS 2³¹-1test pattern @78Gbps, ER=4dB, BER <10^-6.

 

Timing Characteristics

Parameter	Symbol	Min.	Typical	Max.	Unit
TX_Disable Assert Time	t_off			100	us
TX_Disable Negate Time	t_on			2	ms
Time to Initialize	t_start_up			300	ms
Tx_Fault Assert	t_fault_on			1	ms
Tx_Fault Reset	t_reset	10			us
Rx_LOS Assert Delay	t_los_on			100	us
Rx_LOS Negate Delay	t_los_off			100	us
Clock Frequency	fSCL	0		400	kHz

 

Ordering information

Part Number	Product Description
SFP28-25G-BIDI-20-73	TX 1270nm, RX 1330nm, 25.78Gbps, 20km, Bi-Directional Simplex LC SFP28 Transceiver, -5ºC ~ +70ºC, With DDM.
SFP28-25G-BIDI-20-73E	TX 1270nm, RX 1330nm, 25.78Gbps, 20km, Bi-Directional Simplex LC SFP28 Transceiver, -20ºC ~ +80ºC, With DDM.
SFP28-25G-BIDI-20-73T	TX 1270nm, RX 1330nm, 25.78Gbps, 20km, Bi-Directional Simplex LC SFP28 Transceiver, -40ºC ~ +85ºC, With DDM.
SFP28-25G-BIDI-20-37	TX 1330nm, RX 1270nm, 25.78Gbps, 20km, Bi-Directional Simplex LC SFP28 Transceiver, -5ºC ~ +70ºC, With DDM.
SFP28-25G-BIDI-20-37E	TX 1330nm, RX 1270nm, 25.78Gbps, 20km, Bi-Directional Simplex LC SFP28 Transceiver, -20ºC ~ +80ºC, With DDM.
SFP28-25G-BIDI-20-37T	TX 1330nm, RX 1270nm, 25.78Gbps, 20km, Bi-Directional Simplex LC SFP28 Transceiver, -40ºC ~ +85ºC, With DDM.