Ascent Communication Technology

100G QSFP28 FR 1310 nm 2 km

Ascent’s 100G FR1 2km SFP-DD duplex LC transceiver, is a fully integrated, 53.125GBaud PAM4 single optical channel transceiver. The optical channel uses a 4-level pulse amplitude modulation(PAM4) format by means of a DSP, a 1310 nm wavelength EA-DFB laser diode, a PIN photo-diode connecting to a PAM4-based 2 channel x 26.5625GBaud 100GAUI-2 electrical interface by means of a 2:1 mux/demux. This single optical channel technology enables a cost-optimized solution for 100GE optical links. The CMIS compliant 2-wire management interface enables control, alarm and monitoring of the SFP-DD module. The 100GBASE-FR Single Lambda SFP-DD module is designed for use in 100GBASE Ethernet throughput up to 2km over single mode fiber (SMF) using a wavelength of 1310nm via duplex LC connectors. This transceiver is compliant with SFPDD MSA and SFP-DD MIS Rev 2.0 standard. It combines 2x26.5625GBd PAM4 electrical lane sin to one 53.125GBd PAM4 optical channel in compliance with IEEE100GBASE-FR. With these features, this easy to install, hot swappable transceiver is suitable to be used in various applications, such as Data Center, 100G Ethernet.

· IEEE 100GBASE-FR Compliant

· 100GAUI-2 Compliant-2x 26.5625Gbaud

· SFP-DD MSA Compliant

· 3.5W Max Power Consumption (3.0W typ)

· Operating case temperature range: 0 to 70°C

· Single Cooled 100Gb/s 1310nm EML

· Single PIN PD+Low-power TIA

· CMIS Management Interface

Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only. Functional operation of the device is not implied at the seorany other conditions in excess of those given in the operational sections of the datasheet. Exposure to absolute maximum ratings will cause permanent damage and/or adversely affect device reliability.

Parameter	Symbol	Min.	Max.	Unit	Notes
Supply Voltage	V_cc	0	3.6	V	+3.3
Storage Temperature		-40	85	°C
Optical Receiver Input		-	+5.5	dBm	Average

Recommended Operating Conditions
Electrical and optical characteristics below are defined under this operating environment, unless otherwise specified.

Parameter	Symbol	Min.	Typ.	Max	Unit	Notes
Supply Voltage	V_cc	3.135	3.3	3.465	V
Supply Voltage Noise Tolerance	PSNR	-	-	66	mV	10Hz to 10MHz
Power Consumption		-	3.0	3.5	W
Supply Current		-	-	1116.4	mA	Steady state
Case Temperature	T_c	0	25	70	°C

Optical Characteristics

Parameter	Min	Typ.	Max	Unit	Notes
PAM4 Signaling Rate (Range)		53.125 + 100 ppm		GBd
Lane Wavelengths (Range)	1304.5		1317.5	nm
Side-Mode Suppression Ratio (SMSR), (Min)		30		dB
Average Launch Power (Max)		4		dBm
Average Launch Power (Min)		-3.1		dBm	1
Outer Optical Modulation Amplitude (OMAouter) (Max)		4.2		dBm
Outer Optical Modulation Amplitude (OMAouter) (Min) forTDECQ<1.4 dB		-0.1		dBm
Outer Optical Modulation Amplitude (OMAouter) (Min) for 1.4dB STDECQ<3.4 dB		-1.5+TDECQ		dBm
Transmitter and Dispersion Penalty Eye Closure for PAM4TDECQ),(Max)		3.4		dB
Transmitter Eye Closure for PAM4 (TECQ) (Max)		3.4		dB
TDECQ-TECQ (Max)		2.5		dB
Over/Under-Shoot (Max)		22		%
Transmitter Power Excursion (max)		2		dBm
Average Launch Power of OFF Transmitter		-15		dBm
Extinction Ratio (Min)		3.5		dB
Optical Return Loss Tolerance (Max)		17.1		dB
Transmitter Reflectance (Max)		-26		dB	2
Transmitter Tansition Time (Max)		17		ps
RIN15.5 OMA (Max)		-136		dB/Hz
Receiver
PAM4 Signaling Rate (Range)		53.125+ 100 ppm		GBd
Lane Wavelengths (Range)	1304.5		1317.5	Nm
Damage Threshold (min)		5		dBm	3
Average Receive Power (max)		4		dBm
Average Receive Power (min)		-7.1		dBm	4
Receive Power (OMAouter) (Max)		4.2		dBm
Receiver Reflectance (Max)		-26		dB
Receiver Sensitivity (OMAouter) (Max)		-4.5, TE -5.9, (See Below Figure Receiver Sensitvity)		dBm	5
Stressed Receiver Sensitivity (OMAouter) (max)		-2.5			6
Conditions of Stressed Receiver Sensitivity Test					7
Stressed Eve Closure for PA4 (SECQ)		3.4		dB
SECQ-10*log10(Ceg)(max)		-		dB	8

Note:

1. Average launch power (min) is informative and not the principal indicator of signal strength. A transmitter with launch power below this value cannot be compliant: however a value above this does not ensure compliance.

2. Transmitter reflectance is defined looking into the transmitter.

3. The receiver shall be able to tolerate, without damage, continuous exposure to an optical signal having this average power level.

4. Average receive power, each lane (min) is informative and not the principal indicator of signal strength. A received power below this value cannot be compliant: however a value above this does not ensure compliance.

5. Receiver sensitivity (OMAouter), (max) is informative and is defined for a transmitter with a value of SECQ up to 3.4dB.

6. Measured with conformance test signal at TP3 (see lEEE Std 802.3cd clause 140.7.10) for the BER specified in IEEE Std 802.3cd clause 140.1.1.

7. These test conditions are for measuring stressed receiver sensitivity. They are not characteristics of the receiver.

8. Ceq is a coefficient defined in lEEE Std 802.3-2018 clause 121.8.5.3 which accounts for reference equalizer noise enhancement.

OMA Outer

Receiver Sensitivity

RX LOS Alarm Characteristics

Parameter	Symbol	Min.	Max	Unit	Notes
Receiver Loss of Signanl Indicator Assert level		-15	-7.5	dBm	Average power
Receiver Loss of Signanl Indicator Deassert level	RX_LOS	-	-7	dBm	Average power
Hysteresis		0.5	-	dB

Electrical Characteristics

Parameter	Min.	Typ.	Max	Unit	Notes
Module Output (per Lane, at TP4)					1
Signaling Rate per Lane (Range)	-100ppm	26.5625	+100ppm	GBd
AC Common-Mode Output Voltage (RMS)	-	-	17.5	mV
Differential Peak-to-Peak Output Voltage	-	-	900	mV
Near-end ESMW (Eye Symmetry Maskwidth)	0.265	-	-	UI
Near-end Eye Height, Differential	70			mV
Far-end ESMW (Eye Symmetry Maskwidth)	0.2	-	-	UI
Far-end Eye Height, Differential	30	-	-	mV
Far-end Pre-cursor ISI Ratio	-4.5	-	2.5	%
Differential Output Return Loss	Equation (83E-2)	-	-	dB	2
Common to Differential Mode Conversion Return Loss	Equation (83E-3)	-	-	dB	2
Differential Termination Mismatch	-	-	10	%
Transition Time (20% to 80%)	9.5	-	-	ps
DC Common Mode Voltage	-350	-	2850	mV
Module Input (per Lane, at TP1)
Signaling Rate per Lane (Range)	-100ppm	26.5625	+100ppm	GBd
Differential Pk-Pk Input Voltage Tolerance	900	-	-	mV	at TP1a
Differential Input Return Loss	Equation (83E-5)	-	-	dB	at TP1, Note 2
Differential to Common Mode Input Return Loss	Equation (83E-6)	-	-	dB	at TP1. Note 2
Differential Termination Mismatch	-	-	10	%	at TP1
ESMW (Eye Symmetry Mask Width)	0.22	-	-	UI	at TP1a
Eye Width	0.22	-	-	UI	at TP1a
Eye Height	32	-	-	mV	at TP1a
Single-ended Input Voltage Tolerance Range	-0.4	-	3.3	V	at TP1a
DC Common Mode Voltage	-350	-	2850	mV	at TP1