Ascent Communication Technology

100G QSFP28 ER4-E 1310 nm 40 km

Ascent’s 100G QSFP28 ER4-E is designed for 40km optical communication applications. This module contains 4-lane optical transmitter, 4-lane optical receiver and module management block including 2 wire serial inter-face. The optical signals are multiplexed to a single-mode fiber through an industry standard LC connector. Ascent’s 100G QSFP28 ER4-E Optical Transceiver offers service providers, network operators 100 Gigabit Ethernet connectivity options for data center networking, enterprise core aggregation, and service provider transport applications. It integrates receiver and transmitter path on one module. In the transmit side, four lanes of serial data streams are recovered, retimed, and passed to four laser drivers. The laser drivers control 4-EML with center wavelength of 1296 nm, 1300nm, 1304nm and 1309 nm. The optical signals are multiplexed to a single–mode fiber through an industry standard LC connector. In the receive side, the four lanes of optical data streams are optically de-multiplexed by the integrated optical de- multiplexer. Each data stream is recovered by a APD and trans-impedance amplifier, retimed. This module features a hot-pluggable electrical interface, low power consumption and 2-wire serial interface. This product is designed with form factor, optical/electrical connections, and digital diagnostic interface according to the QSFP28 Multi-Source Agreement (MSA) and compliant to IEEE 802.3bm.

Support line rates from103.125 Gb/s
Transmission data rate up to 25.78125Gbps per channel
LAN WDM EML laser and APD
QSFP28 MSA package with duplex LC connector
Single +3.3V Power Supply
Low Power Consumption
Complies with EU Directive 2015/863/EU

Absolute Maximum Ratings

Parameter

Storage Temperature

Symbol

Min.

-40

Max.

Unit

°C

Maximum Supply Voltage

VCC

-0.5

3.6

Operating Relative Humidity

Recommended Operating Conditions

Parameter Operating Case Temperature	Symbol TC	Min. 0	Typ.	Max. +70	Unit °C	Note
Power Supply Voltage	VCC	3.13	3.3	3.47	V
Power Supply Current	ICC	-		1.51	A
Maximum Power Consumption	PD			5	W
Aggregate Bit Rate BRAVE			103.125		Gb/s
Lane Bit Rate BRLANE			25.78125		Gb/s
Transmission Distance TD				40	km
Coupled Fiber Single-mode fiber						9/125 µm SMF
Optical Characteristics
Parameter	Symbol	Min.	Typ.	Max.	Unit	Notes
Transmitter
Signaling Speed per Lane			25.78125		Gb
Lane Wavelength	L0	1294.53	1295.56	1296.59	nm
	L1	1299.02	1300.05	1301.09	nm
	L2	1303.54	1304.58	1305.63	nm
	L3	1308.09	1309.14	1310.19	nm
Total Average Launch Power	PT			12.5	dBm	1
Average Launch Power per	Pavg	-1		6.5	dBm	1
Lane,
OMA, each Lane	POMA	0.5		6.5	dBm	1
Difference in Launch Power between any Two	Ptx, diff			3	dB
Lanes(Average and OMA)
between Any Two
Lanes (OMA)
Average Output Power (Laser	Poff			-30	dBm
Turn Off)
Side Mode Suppression Ratio	SMSR	30			dB
Extinction Ratio, 100GE	ER	7			dB
RIN20OMA	RIN			-130	dB/Hz
Transmitter Reflectance	RT			-26	dB
Optical Eye Mask	{0.25,0.4,	0.45, 0.25, 0.28,	0.4}		%	2
Receiver
Signaling Rate, each Lane			25.78125		Gb
Center Wavelength Lane 0	λ0	1294.53	1295.56	1296.59	nm
Center Wavelength Lane 1	λ1	1299.02	1300.05	1301.09	nm
Center Wavelength Lane 2	λ2	1303.54	1304.58	1305.63	nm
Center Wavelength Lane 3	λ3	1308.09	1309.14	1310.19	nm

Parameter	Symbol	Min.	Typ.	Max.	Unit	Notes
Damage Threshold , each Lane	Pdamage	-2.5			dBm
Receiver Sensitivity, each Lane	SEN			-18	dBm	3
Los Assert	LosA	-30			dBm
Los De-assert	LosDA			-22	dBm
Los Hysteresis	LosH	0.5			dB

Note:
1.          The optical power is launched into SMF.
2.          Measured with a PRBS 231-1 test pattern @25.78125, Hit ratio≤5E-5.
3.      Measured with a PRBS 231-1 test pattern @25.78125 Gb/s, BER≤1E-12.

Electrical Characteristics

Parameter	Symbol	Min	Typ	Max	Unit	Notes
Transmitter (Module Input)
Data Rate, each Lane			25.78125		Gbps
Differential Voltage pk-pk	Vpp			900	mV	1
Common Mode Voltage	Vcm	-350		2850	mV
Transition Time	Trise/Tf all	10			ps	2
Receiver (Module Output)
Data Rate, each Lane			25.78125		Gbps
Common Mode Noise, RMS	Vrms			17.5	mV
Differential Output Voltage Swing	Vout, pp			900	mV
Eye Width	EW15	0.57			UI
Eye Height	EH15	228			mV
Differential Termination Resistance Mismatch				10	%	1
Transition Time	Trise/Tf all	12			ps