Ascent Communication Technology

100G QSFP28 SR01 BIDI MMF 850nm 100m

Ascent’s QSFP28 100G SR BIDI is a parallel Quad Small Form-factor Pluggable (QSFP28) Bi-Direction optical module which can support dual rate 40Gb/s and 100Gb/s bit rates in an optical communication application compliant to SFF-8636 standards. The module integrates four host electrical data into two optical lanes (by Dual Wavelength VCSEL Bi-Directional Optical Interface, 850nm and 900nm) to allow optical communication over a 2-fiber duplex LC optical multi-mode fiber. Reversely, on the receiver side, the module de-multiplexes 2 sets of optical input signal and converts them to 4 channels of electrical data. An optical fiber ribbon cable with an LC connector can be plugged into the QSFP28 module receptacle. Proper alignment is ensured by the guide pins inside the receptacle. The cable usually cannot be twisted for proper channel to channel alignment. Electrical connection is achieved through an MSA-compliant 38-pin edge type connector. The product is designed with form factor, optical/electrical connection, and digital diagnostic interface according to the QSFP+ Multi-Source Agreement (MSA). It has been designed to meet the harshest external operating conditions including temperature, humidity, and EMI interference.

· Compliant to the 100GbE XLPPI electrical specification per IEEE 802.3bm

· Compliant to QSFP28 SFF-8636 Specification

· Support 40GE/100GE aggregate bit rates

· Aggregate bandwidth of > 100Gbps

· Dual wavelength VCSEL bi-directional optical interface, PAM4 2 × 50-Gb/s 850nm/900 nm

· QSFP28 MSA compliant

· Capable of over 70m transmission on OM3 Multimode Fiber (MMF)and 100m on OM4 MMF

· Single +3.3V power supply operating

· With digital diagnostic functions

· Temperature range 0°C to 70°C

· RoHS Compliant Part

· Utilizes a standard LC duplex fiber cable allowing reuse of existing cable infrastructure

Absolute Maximum Ratings

Parameter

Storage Temperature

Symbol

T_s

Min.

-40

Max.

Unit

°C

Notes

Supply Voltage

V_CCT,R

-0.5

Relative Humidity

Recommended Operating Conditions

Parameter Operating Case Temperature	Symbol T_c	Min. 0	Typ. -	Max. 70	Unit °C	Notes
Supply Voltage	V_CCT,R	3.13	3.3	3.47	V
Supply Current	I_CC			1000	mA
Power Dissipation	PD			3.5	W

Optical Characteristics (TOP = 0 to 70 °C, VCC = 3.0 to 3.6 Volts)

Parameter Transmitter	Symbol	Min.	Typ.	Max.	Unit	Notes
Optical Wavelength CH1	λ	832	850	868	nm
Optical Wavelength CH2	λ	882	900	918	nm
RMS Spectral Width	Pm		0.5	0.65	nm
Average Optical Power per Channel
Laser Off Power Per Channel	Poff			-30	dBm
Optical Extinction Ratio	ER	3.0			dB
Relative Intensity Noise	Rin			-128	dB/HZ	1
Optical Return Loss Tolerance				12	dB
Receiver
Optical Center Wavelength CH1	λ	882	900	918	nm
Optical Center Wavelength CH2	λ	832	850	868	nm
Receiver Sensitivity per Channel	R			-8	dBm
Maximum Input Power	PMAX	+0.5			dBm
Receiver Reflectance	Rrx			-15	dB
LOS De-Assert	LOSD			-10	dBm
LOS Assert	LOSA	-30			dBm
LOS Hysteresis	LOSH	0.5			dB

Notes:
1. 12dB Reflection

Electrical Characteristics (TOP = 0 to 70 °C, VCC = 3.13 to 3.47 Volts)

Parameter	Symbol	Min.	Typ.	Max.	Unit	Notes
Data Rate per Channel			25.78125		Gbps
Power Consumption		-	2.5	3.5	W
Supply Current	I_cc		0.75	1.0	A
Control I/O Voltage-High	VIH	2.0		V_cc	V
Control I/O Voltage-Low	VIL	0		0.7	V
Inter-Channel Skew	TSK			150	Ps
RESETL Duration			10		Us
RESETL De-assert time				100	ms
Power On Time				100	ms
Transmitter
Single Ended Output Voltage Tolerance		0.3		4	V	1
Common mode Voltage Tolerance		15			mV
Transmit Input Diff Voltage	VI	120		1200	mV
Transmit Input Diff Impedance	ZIN	80	100	120
Data Dependent Input Jitter	DDJ			0.1	UI
Data Input Total Jitter	TJ			0.28	UI
Receiver
Single Ended Output Voltage Tolerance		0.3		4	V
Rx Output Diff Voltage	Vo		600	800	mV
Rx Output Rise and Fall Voltage	Tr/Tf	12			ps	1
Total Jitter	TJ			0.7	UI
Deterministic Jitter	DJ			0.42	UI