100G QSFP28 BIDI Tx1291nm/ Rx1311 nm

Brand: D-TECH SKU: #21

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Category: Networking Goods

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Product Overview

The 100G QSFP28 Bi-Directional (BIDI) transceiver is designed for high-speed optical communication over single-mode fiber (SMF). It operates using a single fiber strand with duplex wavelength transmission—Tx1291nm/Rx1311nm or the reverse pair.
This module provides reliable 100Gbps data transmission up to 20 kilometers, making it ideal for data center interconnects and 100G Ethernet backbone applications.

Features

Supports 106.25Gbps PAM4 lane signaling rate
Up to 20km transmission over single-mode fiber (SMF)
EML laser and PIN photodiode receiver
4x25.78Gbps NRZ electrical interface (CAUI-4)
KP4 FEC supported inside the module
I²C interface with integrated digital diagnostics (DDM)
Simplex LC optical interface in QSFP28 MSA form factor
Single +3.3V power supply, power consumption <4W
Operating temperature range: 0°C to +70°C
Fully compliant with SFF-8636, SFF-8679, and 100G Lambda MSA LR1 standards
RoHS 2.0 and EU Directive 2015/863/EU compliant

Applications

100GBASE-LR BIDI Ethernet Links
Data Center Interconnections (DCI)
Enterprise and Campus Networks
High-Speed Switching and Routing Platforms

Ordering Information

Data Rate	Wavelength (Tx/Rx)	Fiber Type	Distance	Connector	Temp Range	DDM	Latch Color
106.25Gbps	1291nm / 1311nm	SMF	20km	Simplex LC	0~70°C	Yes	Purple
106.25Gbps	1311nm / 1291nm	SMF	20km	Simplex LC	0~70°C	Yes	Red

Absolute Maximum Ratings

Parameter	Symbol	Min	Max	Unit
Storage Temperature	TS	-40	+85	°C
Supply Voltage	VCC	-0.5	+4.0	V
Operating Relative Humidity	RH	—	+85	%

Recommended Operating Conditions

Parameter	Symbol	Min	Typical	Max	Unit
Case Temperature	TC	0	—	+70	°C
Power Supply Voltage	VCC	3.13	3.3	3.47	V
Transmission Distance	TD	—	—	20	km (over SMF)

Optical Characteristics

Transmitter

Parameter	Symbol	Min	Typical	Max	Unit
Center Wavelength	CW	1284.5	1291	1297.5	nm
Average Launch Power	PTX	-0.2	—	+6.6	dBm
Extinction Ratio	ER	3.5	—	—	dB
Optical Modulation Amplitude (OMAouter)	OMAouter	2.8	—	—	dBm
TDECQ (max)	TDECQ	—	—	3.6	dB
Side Mode Suppression Ratio	SMSR	30	—	—	dB
Power Off (Laser Off)	Poff	—	—	-30	dBm

Receiver

Parameter	Symbol	Min	Max	Unit
Center Wavelength	CW	1284.5 / 1311	1297.5 / 1317.5	nm
Receiver Sensitivity (OMAouter)	SEN_OMA	—	-7.6	dBm
Average Input Power	PRx	-10	+6.6	dBm
Damage Threshold	Pdamage	7.6	—	dBm
Reflectance	Ref	—	-26	dB
LOS Assert / De-Assert	LosA / LosDA	-26 / -10	—	dBm

Electrical Characteristics

Parameter	Symbol	Min	Typical	Max	Unit
Differential Input Impedance	Rin	—	100	—	Ω
Input Voltage Swing (Differential)	VIN,P-P	—	—	900	mVpp
Output Differential Impedance	Rout	—	100	—	Ω
Output Voltage Swing	VOUT,P-P	—	—	900	mVpp
Common Mode Voltage	—	-0.3	—	2.8	V
Transition Time (20%~80%)	Tr/Tf	10	—	—	ps
Power Supply	VCC	3.13	3.3	3.47	V

Digital Diagnostic Monitoring (DDM)

Parameter	Range	Accuracy	Unit
Temperature	0 to +70	±3	°C
Voltage	0 to Vcc	±3%	V
Tx Bias Current	0 to 100	±10%	mA
Tx Output Power	-0.2 to +6.8	±3	dB
Rx Input Power	-10 to +6.6	±3	dB

Communication Interface Timing

Parameter	Symbol	Max	Unit	Description
Initialization Time	t_init	10	s	Time from power-on or hot-plug until module is fully operational

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