Ascent Communication Technology

100G QSFP28 ZR4 1310 nm 80 km

Ascent’s QSFP28-100G-LP80 is multi-vendor MSA compatible 100GBASE-ZR4 QSFP28 (Quad Small Form-Factor Pluggable 28) transceiver, operating over a pair of single-mode optical fibers with four independent optical communication lanes separated from each other using LAN WDM technology. This Module has a minimum guaranteed optical budget of 27 dB (with host FEC), which in most cases is enough to reach 80 km distance (with host FEC) and 40 km distance (without host FEC) using a single-mode cable. However, this distance is only an indicative parameter calculated for comfort of identification. Actual distance should be calculated by taking into account minimal optical budget and average attenuation of optical cabling in industry.

• 100GBASE-ZR4 QSFP28

• Multi-vendor MSA compatible

• Tx/Rx Wavelength: 1295.56, 1300.05, 1304.58, 1309.14 nm

• EML-cooled LAN WDM TOSA laser

• Single-mode fiber (SMF)

• Double LC connectors

• 27 dB optical budget (with host FEC)

• Max. distance: 80 km (with host FEC), 40 km (no host FEC)

• 103.125 Gbps data rate

• FEC Forward Error Correction: KR4 FEC Supported

• Supports DDM/DOM

• ≤6.5 W power consumption

• 0 °C to +70 °C temperature range

Absolute Maximum Ratings

It has to be noted that the operation in excess of any individual absolute maximum ratings might cause permanent damage to this module.

Parameter	Symbol	Min.	Typ.	Max.	Unit	Notes
Maximum Supply Voltage	Vcc	0		3.6	V
Storage Temperature	Ts	‑40		85	°C
Relative Humidity	RH	5		85	%	1
Damage Threshold, each lane	THd	6.5			dBm

Notes

1. Non‑condensing

Operating Environments

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

Parameter	Symbol	Min.	Typ.	Max.	Unit
Supply Voltage	Vcc	3.135	3.3	3.465	V
Case Temperature	Top	0		70	°C
Link Distance with G.652				80	km

Electrical Characteristics

Parameter	Symbol	Min.	Typ.	Max.	Unit	Notes
Power Dissipation				6.5	W
Supply Current	Icc			1.8759	A	Steady state
Transmitter
Data Rate, each Lane			25.78125		Gbps
Differential Voltage pk‑pk	Vpp			900	mV	At 1 MHz
Common Mode Voltage	Vcm	‑350		2850	mV
Transition Time	Trise/Tfall	10			ps	20 % to 80 %
Differential Termination Resistance Mismatch				10	%
Eye Width	EW15	0.46			UI
Eye Height	EH15	95			mV
Receiver
Data Rate, each Lane			25.78125		Gbps
Differential Termination Resistance Mismatch				10	%	At 1 MHz
Differential Output Voltage Swing	Vout, pp			900	mV
Common Mode Noise, RMS	Vrms			17.5	mV
Transition Time	Trise/Tfall	12			ps	20 % to 80 %
Eye Width	EW15	0.57			UI
Eye Height	EH15	228			mV

Optical Characteristics

100GBASE‑ZR4 Operation (EOL, TOP = 0 to +70 °C, VCC = 3.135 V to 3.465 V)

Parameter	Unit	Min	Typ.	Max.	Notes
Transmitter
Signaling Speed per Lane	Gb/s	25.78125 ± 100 ppm
Transmit Wavelengths	nm	1294.53		1296.59	1295.56 nm
		1299.02		1301.09	1300.05 nm
		1303.54		1305.63	1304.58 nm
		1308.09		1310.19	1309.14 nm
Side‑Mode Suppression Ratio (SMSR)	dB	30
Total Launch Power (P_total)	dBm	8.0		12.5
Average Launch Power, each Lane (P_each)	dBm	2.0		6.5
Average Launch Power of OFF Transmitter, each Lane	dBm			‑30
Optical Extinction Ratio (ER)	dB	8
RIN OMA	dB/Hz			‑130
Optical Return Loss Tolerance	dB			20
Transmitter Reflectance	dB			‑12
Transmitter Eye Mask Definition {X1, X2, X3, Y1, Y2, Y3}		IEEE 802.3 Clause 88 100Gbase‑ZR4 + KR4‑FEC, {0.25, 0.4, 0.45, 0.25, 0.28, 0.4}			1
Mask Margin	%	5
Receiver
Signaling Speed per Lane	Gb/s	25.78125 ± 100 ppm
Receiver Wavelengths	nm	1294.53		1296.59
		1299.02		1301.09
		1303.54		1305.63
		1308.09		1310.19
Damage Threshold (R_dam)	dBm	6.5
Average Receiver Power, each Lane	dBm	‑28		‑7
Receiver Power, each Lane (OMA)	dBm			‑7
Receiver Sensitivity, each Lane (AOP)	dBm			‑28	1
Receiver Sensitivity, each Lane (OMA)	dBm			‑26.4	1
Receiver 3 dB Electrical Upper Cutoff Frequency, each Lane	GHz			31
Damage Threshold, each Lane (Rdam)	dBm	6.5
Receiver Reflectance	dB			‑26
LOS Assert	dBm	‑40
LOS De‑assert	dBm			‑29
LOS Hysteresis	dB	0.5