Ascent Communication Technology

100G QSFP28 LR Single λ 10 km

Ascent’s QSFP28 100G LR1 Ethernet module is a transceiver module designed for 10km optical communication applications, and it is compliant with IEEE 802.3cd and QSFP28 MSA standard.

• Compliant with QSFP28 Standard: SFF-8636 Rev 2.10a

• Compliant with IEEE802.3cu D3.2 100GBASE-LR1

• High speed I/O electrical interface (CAUI-4)

• Single 3.3V Supply Voltage

• Maximum power consumption 4.5W

• 0-70 ºC Case Operating Temperature

• 1311nm EML laser and PIN Receiver

• Hermetically sealed TO Based design

• QSFP28 MSA package with duplex LC connector

• Two Wire Serial Interface with Digital Diagnostic Monitoring

• KP4 FEC termination inside module

• Supporting 10km reach of single mode fiber

• Complies with EU Directive 2011/65/EU (RoHS compliant)

• Class 1 Laser

Absolute Maximum Ratings

Parameter	Symbol	Min.	Typ.	Max.	Unit	Notes
Storage Temperature	TS	‑40	‑	+85	ºC
Supply Voltage	VCC	‑0.3	‑	3.6	V
Relative Humidity (Non‑Condensing)	RH	5	‑	95	%
Data Input Voltage – Differential	\|V_DIP‑V_DIN\|	‑	‑	1.0	V
Control Input Voltage	V_I	‑0.3	‑	Vcc+0.3	V
Control Output Current	I_O	‑20	‑	20	mA

Recommended Operating Conditions

Parameter	Symbol	Min.	Typ.	Max.	Unit	Note
Operating Case Temperature	T_OPR	0	‑	70	°C
Power Supply Voltage	V_CC	3.135	3.3	3.465	V
Instantaneous Peak Current at Hot Plug	I_{CC_IP}	‑	‑	1800	mA
Sustained Peak Current at Hot Plug	I_{CC_SP}	‑	‑	1485	mA
Maximum Power Dissipation	P_D	‑	‑	4.5	W	1
Maximum Power Dissipation, Low Power Mode	P_DLP	‑	‑	1.5	W
Signaling Rate	SR	‑	53.125	‑	GBd
Control Input Voltage High	V_IH	V_CC*0.7	‑	V_CC+0.3	V
Control Input Voltage Low	V_IL	‑0.3	‑	V_CC*0.3	V
Two Wire Serial Interface Clock Rate	‑	‑	‑	400	kHz
Power Supply Noise	‑	‑	‑	66	mVpp	2
Rx Differential Data Output Load	‑	‑	100	‑	ohms
Operating Distance	‑	2	‑	10000	m

Notes:

1. With power supply voltage 3.3 V.

2. 10Hz ‑10MHz

Optical and Electrical Characteristics

Parameter	Symbol	Min.	Typ.	Max.	Unit	Note
Transmitter
Wavelength	λ_C	1304.5	1311	1317.5	nm
Side Mode Suppression Ratio	SMSR	30	‑	‑	dB
Average Optical Launch Power	P_OUT	‑1.9	‑	4.8	dBm	1
Average Launch Power of OFF Transmitter	P_{OUT_OFF}	‑	‑	‑15	dBm
Extinction Ratio	ER	3.5	‑	‑	dB
Outer Optical Modulation Amplitude	OMA_outer	‑	‑	5	dBm
Outer Optical Modulation Amplitude for TDECQ <1.4 dB for 1.4 dB ≤TDECQ ≤3.4 dB	OMA_outer	1.1 ‑0.3+ TDECQ	‑ ‑	‑ ‑	dBm dBm
Transmitter and Dispersion Eye Closure	TDECQ	‑	‑	3.4	dB
Transmitter eye closure for PAM4 (TECQ)	TECQ	‑	‑	3.4	dB
\|TDECQ ‑ TECQ\|	‑	‑	‑	2.5	dB
Over/Under‑Shoot	‑	‑	‑	22	%
Transmitter Power Excursion	‑	‑	‑	2.8	dBm
RIN15.6OMA	RIN	‑	‑	‑136	dB/Hz
Optical return loss tolerance	ORLT	‑	‑	15.6	dB
Transmitter transition time		‑	‑	17	ps
Transmitter reflectance	TR	‑	‑	‑26	dB
Receiver
Wavelength	λC	1304.5	1311	1317.5	nm
Damage Threshold		5.8	‑	‑	dBm
Average Receive Power		‑8.2	‑	4.8	dBm	2
Receive Power (OMA_outer)	RP	‑	‑	5	dBm
Receiver Reflectance	RR	‑	‑	‑26	dB
Receiver Sensitivity (OMA_outer) for TECQ < 1.4 dB for 1.4 dB≤ TECQ ≤3.4 dB	RS	‑ ‑	‑ ‑	‑6.1 ‑7.5+ TECQ	dBm dBm
Stressed Receiver Sensitivity	SRS	‑	‑	‑4.1	dBm	3
Stressed Receiver Sensitivity Test Conditions
Stressed eye closure for PAM4 (SECQ)	SECQ	‑	‑	3.4	dB

Notes:

1. Average launch power is informative and not the principal indicator of signal strength.

2. Average receive power (min) is informative and not the principal indicator of signal strength.

3. Measured with conformance test signal at TP3 for the BER = 2.4 x 10^‑4.

Electrical Specifications High Speed Signal

Compliant with IEEE 802.3 CAUI‑4

Parameter	Symbol	Min.	Typ.	Max.	Unit	Note
Receiver (Module Output)
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
Transmitter (Module Input)
Differential pk‑pk Input Voltage Tolerance		900	‑	‑	mV
Differential Termination Mismatch		‑	‑	10	%
Single‑Ended Voltage Tolerance Range		‑0.4	‑	3.3	V
DC Common Mode Voltage		‑350	‑	2850	mV

Electrical Specification Low Speed Signal

Compliant with SFF‑8679 Rev 1.8

Parameter	Symbol	Min.	Max.	Unit	Condition
Module Output SCL and SDA	VOL	0	0.4	V
	VOH	Vcc‑0.5	Vcc+0.3	V
Module Input SCL and SDA	VIL	‑0.3	Vcc*0.3	V
	VIH	Vcc*0.7	Vcc+0.5	V
LPMode/TxDis, ResetL, and ModSelL	VIL	‑0.3	0.8	V
	VIH	2	Vcc+0.3	V
ModPrsL and IntL/RxLOSL	VOL	0	0.4	V
	VOH	Vcc‑0.5	Vcc+0.3	V

Digital Diagnostics

Parameter	Range	Accuracy	Unit	Calibration
Temperature	0 to 70	±3	°C	Internal
Voltage	0 to VCC	±3%	V	Internal
Tx Bias Current	0 to 100	±10%	mA	Internal
Tx Output Power	‑1.9 to +4.8	±3	dB	Internal
Rx Receive Power	‑8.2 to +4.8	±3	dB	Internal