Ascent Communication Technology

Q28OA-100G-LP10

Ascent’s 100G QSFP28 LR4 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 × Distributed Feedback Laser (DFB) with center wavelengths of 1296 nm, 1300 nm.,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 PIN photo-detector and trans-impedance amplifier , retimed. This module features a hot-pluggable electrical interface , low power consumption and MDIO management 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 up to 103.125 Gbps
Digital Diagnostics Monitoring Interface
Duplex LC optical receptacle
No external reference clock
Electrically hot-pluggable
Compliant with QSFP28 MSA with LC connector
Compatible with SONET OC-192, SDH STM-64
Power consumption < 4 W
RoHS compliant

Absolute Maximum Ratings

Parameter	Symbol	Min.	Typ.	Max.	Unit	Note
Storage Temperature	Ts	-40	-	85	°C
Relative Humidity	RH	5	-	95	%
Power Supply Voltage	VCC	-0.3	-	4	V
Signal Input Voltage		Vcc-0.3	-	Vcc+0.3	V

Recommended Operating Conditions

Parameter	Symbol	Min.	Typ.	Max.	Unit	Note
Operating Case	Tcase	0	-	70	°C
Temperature		-10	-	85	°C
Power Supply Voltage	VCC	3.13	3.3	3.47	V
Power Supply Current	ICC			1010 1150	mA mA	Commercial Industrial
Data Rate	BR	25.78125		Gbps	Each channel
Transmission Distance	TD	-	10	km
Coupled fiber	Single-mode fiber				9/125 µm SMF

Optical Characteristics

Parameter	Symbol Min Typ.	Max	Unit	Note
Transmitter
Signaling Speed per Lane	25.78125 ±		Gbps
Wavelength Assignment	100 ppm
	λ0 1294.53 1295.56	1296.59	nm
	λ1 1299.02 1300.05	1301.09	nm
	λ2 1303.54 1304.58	1305.63	nm
	λ3 1308.09 1309.14	1310.19	nm
Total Output Power	POUT	10.5	dBm
Transmit OMA per Lane	-1.3	4.5	dBm
Average Launch Power per	-4.3	4.5	dBm
Lane
SMSR	30		dB
Optical Extinction Ratio	ER 4		dB
Average launch Power off	Poff	-30	dBm
per lane
RIN	RIN	-130	dB/Hz
Output Eye Mask Definition	{0.25, 0.4, 0.45, 0.25, 0.28, 0.4}			1
{X1, X2, X3, Y1, Y2, Y3}
Receiver
Signaling Speed per Lane	25.78125 ±		Gbps
Wavelength Assignment	100 ppm
	1294.53 1295.56	1296.59	nm
	1299.02 1300.05	1301.09	nm
	1303.54 1304.58	1305.63	nm
	1308.09 1309.14	1310.19	nm
Receive Power (OMA) per	ROMA	4.5	dBm
Lane
Average Input Power per Channel	RXPx -10.6	4.5	dBm	2
Rx Sensitivity per lane	RSENS	-8.6	dBm
LOS De-Assert	LOSD -30		dBm
LOS Assert	LOSA	-12	dBm
Receiver Reflectance	Rr	-26	dB

Notes:
1. Hit ratio 5x10-5.
2. Measured with a PRBS 231-1 test pattern, @ 25.78Gb/s, BER<10-12.

Electrical Characteristics

Parameter	Symbol	Min	Typ.	Max	Unit	Note
Supply Voltage	Vcc	3.13	3.3	3.47	V
Supply Current	Icc			1010 1150	Ma	Commer cial Industrial
Transmitter Input Differential Impedance	Rin		100		Ω	1
Differential Data Input	Vin, pp	180		1000	mV
Swing Transmit Disable Voltage Transmit Enable Voltage Receiver	VD	Vcc-1.3		Vcc	V
	VEN	Vee		Vee+0.8	V	2
Differential Data Output	Vout, pp	300		850	mV	3
Swing LOS Fault LOS Normal	VLOSfault	Vcc-1.3		VccHOST	V	4
Swing LOS Fault LOS Normal	VLOSnorm	Vee		Vee+0.8	V	4

Notes:
1.Connected directly to TX data input pins. AC coupled thereafter.
2.Or open circuit.
3. Into 100 Ω differential termination.
4. Loss Of Signal is LVTTL. Logic 0 indicates normal operation; logic 1 indicates no signal detected.