Ascent Communication Technology

100G QSFP28 DR Single λ 500 m

Ascent’s QSFP28 100G DR Single Lambda Ethernet module is a transceiver module designed for 500m optical communication applications, and it is compliant with IEEE 802.3cu 100GBASE-DR standard. QS28-100G-DR1-05 can be used in Data Centers, High- speed interconnects within and between switches, routers and transport equipment, Server-Server Clusters, Super-computing interconnections and other network applications. This module incorporates one channel optical signal, on 1310nm center wavelength. The transmitter path incorporates an EML Driver integrated in the DSP and a cooled EML together. On the receiver path, the input optical signal is coupled to a Pin photodiode detector. can convert 4-channel 25.78125Gbit/s electrical data to 1-channel 106.25Gbit/s optical signals. It has been designed to meet the harshest external operating conditions including temperature, humidity and EMI interference. The module offers very high functionality and feature integration, accessible via a two-wire serial interface.

· IEEE 100GBASE-DR compliant

· 100GE Single Protocol (103.125 Gb/s)

· CAUI-4 compliant - 4x 25.78125 Gb/s

· 100GAUI-4 compliant – 4x 26.5625 Gb/s

· RS-FEC(544,514) FEC coder/decoder function

· < 3.5 W MAX

· 0 to 70°C

· Single cooled 100Gb/s 1310nm EML

· Single PIN PD + low-power TIA

· SFF-8636 management interface

Absolute Maximum Ratings

Parameter	Symbol	Min.	Typ.	Max.	Unit	Note
Supply Voltage	VCC	0	-	+3.6	V	3.3
Storage Temperature		-40	-	+85	°C
Optical Receiver Input		-		+5.0	dBm	Average

Operating Environment

Parameter	Symbol	Min.	Typ.	Max.	Unit	Note
Supply Voltage	Vcc	3.135	3.3	3.465	V
Supply Voltage Noise Tolerance	PSNR	-	-	66	mV	10 Hz –10 MHz
Power Consumption		-	-	3.5	W	Target
Supply Current		--	-	1010.1	mA	Steady state
Case Temperature	TC	0	25	70	°C

Optical Characteristics

Parameter	Value	Unit	Note
Transmitter
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)	-2.9	dBm	1
Outer Optical Modulation Amplitude (OMAouter) (Max)	4.2	dBm
Outer Optical Modulation Amplitude (OMAouter) (Min)	-0.8	dBm	2
Launch Power in OMAouter Minus TDECQ (min) ER≥5dB2	-2.2	dBm
Launch Power in OMAouter Minus TDECQ (min) ER<5dB2	-1.9	dBm
Transmitter and Dispersion Penalty Eye Closure for PAM4 (TDECQ), (Max)	3.4	dB
TDECQ – 10*Log10(Ceq) (Max)	3.4	dB	4
Average Launch Power of OFF Transmitter (Max)	-15	dBm
Extinction Ratio (Min)	3.5	dB
Optical Return Loss Tolerance (Max)	15.5	dB
Transmitter Reflectance (Max)	-26	dB	3
Transmitter Transition 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 to 1317.5	Nm
Damage Threshold (Min)	5	dBm	5
Average Receive Power (Max)	4	dBm
Average Receive Power (Min)	-5.9	dBm	6
Receive Power (OMAouter) (Max)	4.2	dBm
Receiver Reflectance (Max)	-26	dB
Receiver Sensitivity (OMAouter) (Max)	−3.9, ????????????????−5.	dBm	7
Stressed Receiver Sensitivity (OMAouter) (Max)	-1.9		8
Conditions of Stressed Receiver Sensitivity Test			9
Stressed Eye Closure for PAM4 (SECQ)	3.4	dB
SECQ – 10*Log10(Ceq) (Max)	3.4	dB	10

Notes:

1. Average launch power, each lane (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. Even if the TDECQ < 1.4 dB for an extinction ratio of ≥ 5 dB or TDECQ < 1.1dB for an extinction ratio of < 5 dB, the OMAouter (min) must exceed this value.

3. Transmitter reflectance is defined looking into the transmitter.

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

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

6. 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.

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

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

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

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

RX_LOS Characteristics

Parameter

Symbol

Min.

Typ.

Max.

Unit

Note

Receiver Loss of Signal Indicator

Assert Level

RX_LOS

-30

-7.5

dBm

Average power

Receiver Loss of Signal Indicator

De-assert Level

RX_LOS

-7

dBm

Average power

Electrical Characteristics

Parameter	Min.	Typ.	Max.	Unit	Note
Transmitter (each lane)
Differential Pk-Pk Input Voltage Tolerance (Min)	900	-	-	mV	at TP1a
Differential Termination Mismatch	-	-	10	%	at TP1
Single-Ended Input Voltage Tolerance Range	-0.4 to 3.3	-	-	V	at TP1a
DC Common Mode Voltage	-350	-	2850	mV	at TP1
Receiver (Each Lane, at TP4)
AC Common-Mode Output Voltage (RMS)	-	-	17.5	mV
Differential Output Voltage	-	-	900	mV
Eye Width	0.57	-	-	UI
Eye Height, Differential	228	-	-	mV
Vertical Eye Closure	-	-	5.5	dB
Differential Termination Mismatch	-	-	10	%
Transition Time (20% to 80%)	12	-	-	ps
DC Common Mode Voltage	-350	-	2850	mV