100G QSFP28 2km Optical Transceiver

The 100G QSFP28 2km Optical Transceiver is a high-speed optical communication module mainly used for 100G Ethernet (100GbE) or 4×25G InfiniBand applications in data centres, enterprise networks, and telecom backbones, with a transmission distance of up to 2km (OM3/OM4 optical fibre or multimode/singlemode optical fibre).

Specification

Resources

Features

l Lane bit rate 25.78 Gb/s;

l Single +3.3V power supply;

l Compliant to IEEE802.3bm;

l Up to 2km transmission on SMF;

l Compliant to 100G CWDM4 MSA;

l CWDM DML laser and PIN receiver;

l Maximum power consumption 3.5 W;

l Compliant to SFF-8665 and SFF-8679;

l Operating case temperature: 0 to +70 °C;

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

l Supports 100GBASE-CWDM4(103.1Gb/s);

l Complies with EU Directive 2011/65/EU (RoHS 6);

l QSFP28 MSA package with duplex LC connector;

l I2C interface with integrated Digital Diagnostic monitoring;

Application

l 100GBASE-CWDM4 application with FEC;

Absolute Maximum Ratings

Table 1-Absolute Maximum Ratings

Parameter	Symbol	Min.	Typical	Max.	Unit	Notes
Storage Temperature	T_S	-40	-	+85	°C
Supply Voltage	V_CC	-0.5	-	+4.0	V
Operating Relative Humidity	RH	-	-	+85	%

Recommended Operating Conditions

Table 2-Recommended Operating Conditions

Parameter	Symbol	Min.	Typical	Max.	Unit	Notes
Operating Case Temperature	T_C	0	-	+70	°C
Power Supply Voltage	V_CC	3.13	3.3	3.47	V
Power Supply Current	I_CC	-	-	1.1	A
Maximum Power Dissipation	P_D	-	-	3.5	W
Aggregate Bit Rate	BR_AVE	-	103.125	-	Gb/s
Lane Bit Rate	BR_LANE	-	25.78	-	Gb/s
Transmission Distance	TD		-	2	km	Over SMF

Optical Characteristics

Table 3-Optical Characteristics

Transmitter
Parameter	Symbol	Min.	Typical	Max.	Unit	Notes
Center Wavelength Lane 0	λ₀	1264.5	1271	1277.5	nm
Center Wavelength Lane 1	λ₁	1284.5	1291	1297.5	nm
Center Wavelength Lane 2	λ₂	1304.5	1311	1317.5	nm
Center Wavelength Lane 3	λ₃	1324.5	1331	1337.5	nm
Total Launch Power, 100GE	P_ALL	-	-	8.5	dBm	1
Average Launch Power per Lane, 100GE	P_{TX_LANE}	-6.5	-	2.5	dBm	1
OMA per Lane, 100GE	OMA	-4	-	2.5	dBm	1
OMA–TDP per Lane, 100GE	OMA_TDP	-5.0	-	-	dBm
Difference in launch power between lanes	P_{TX_Delta_LANE}	-	-	6.0	dB
Average Output Power (Laser Turn off)	P_0UT-OFF	-	-	-30	dBm
Side Mode Suppression Ratio	SMSR	30	-	-	dB
Extinction Ratio, 100GE	ER	3.5	-	-	dB
Transmitter and Dispersion Penalty	TDP	-	-	3.0	dB	2
Optical Return Loss Tolerance	ORLT	-	-	20	dB

Optical Eye Mask, 100GE {X1,X2,X3,Y1,Y2,Y3}	Compliant with 100G CWDM4 MSA {0.31,0.4,0.45,0.34,0.38,0.4}					2
Receiver
Parameter	Symbol	Min.	Typical	Max.	Unit	Notes
Center Wavelength Lane 0	λ₀	1264.5	1271.0	1277.5	nm
Center Wavelength Lane 1	λ₁	1284.5	1291.0	1297.5	nm
Center Wavelength Lane 2	λ₂	1304.5	1311.0	1317.5	nm
Center Wavelength Lane 3	λ₃	1324.5	1331.0	1337.5	nm
OMA Sensitivity per Lane, 100GE	Rxsens	-	-	-11.5	dBm	3
Stressed receiver sensitivity (OMA), per lane	SRS_OMA	-	-	-7.3	dBm	3
SRS eye mask definition, 100GE {X1,X2,X3,Y1,Y2,Y3}	Compliant with 100G CWDM4 MSA {0.39,0.5,0.5,0.39,0.39,0.4}
Damage threshold	Pdamage	3.5	-	-	dBm
Receive Saturation (OMA) per Lane	Rmax	2.5	-	-	dBm
Reflectance	Ref	-	-	-26	dB
LOS Assert per lane	LOS_A	-25	-	-	dBm
LOS De-assert	LOS_D	-	-	-13	dBm
LOS Hysteresis	LOS_H	0.5	-	6	dB

1. The optical power is launched into SMF.

2. Measured with a PRBS 2³¹-1 test pattern @25.78125Gb/s, Hit ratio≤5E-5.

3. Measured with a PRBS 2³¹-1 test pattern @25.78125 Gb/s, BER≤5E-5.

Electrical Characteristics

High-Speed Signal: Compliant to CAUI-4 (IEEE 802.3bm)

Low-Speed Signal: Compliant to QSFP-8679.

Table 4-Electrical Characteristics

Transmitter (Module Input)
Parameter	Symbol	Min.	Typical	Max.	Unit	Notes
Differential Data Input Amplitude	V_IN,P-P	85	-	900	mVpp
Differential Termination Mismatch		-	-	10	%
LPMode, Reset and ModSelL, V in low	V_IL	-0.3	-	0.8	V
LPMode, Reset and ModSelL, V in high	V_IH	2.0	-	V_CC+0.3	V
Receiver (Module Output)
Parameter	Symbol	Min.	Typical	Max.	Unit	Notes
Differential Data Output Amplitude	V_OUT,P-P	200	-	900	mVpp
Differential Termination Mismatch（1MHZ）		-	-	10	%
Output Rise/Fall Time, 20%~80%	T_R	12	-	-	ps
ModPrsL and IntL, V out low	V_OL	0	-	0.4	V
ModPrsL and IntL, V out high	V_OH	V_CC-0.5	-	V_CC+0.3	V

Digital Diagnostics

Table 5-Digital Diagnostics

Parameter	Range	Accuracy	Unit	Calibration
Temperature	0 to 70	±3	ºC	Internal
Voltage	0 to V_CC	0.1	V	Internal
Tx Bias Current Per Lane	0 to 100	10%	mA	Internal
Tx Output Power Per Lane	-6.5 to 3	±3	dBm	Internal
Rx Power (Each Lane)	-11.5 to 3	±3	dBm	Internal

Pin Definitions

PIN	Logic	Symbol	Description	Plug Seq.	Notes
1		GND	Ground	1	1
2	CML-I	Tx2n	Transmitter Inverted Data Input	3
3	CML-I	Tx2p	Transmitter Non-Inverted Data output	3
4		GND	Ground	1	1
5	CML-I	Tx4n	Transmitter Inverted Data Input	3
6	CML-I	Tx4p	Transmitter Non-Inverted Data output	3
7		GND	Ground	1	1
8	LVTLL-I	ModSelL	Module Select	3
9	LVTLL-I	ResetL	Module Reset	3
10		VccRx	﹢3.3V Power Supply Receiver	2	2
11	LVCMOS-I/O	SCL	2-Wire Serial Interface Clock	3
12	LVCMOS-I/O	SDA	2-Wire Serial Interface Data	3
13		GND	Ground	1
14	CML-O	Rx3p	Receiver Non-Inverted Data Output	3
15	CML-O	Rx3n	Receiver Inverted Data Output	3
16		GND	Ground	1	1
17	CML-O	Rx1p	Receiver Non-Inverted Data Output	3
18	CML-O	Rx1n	Receiver Inverted Data Output	3
19		GND	Ground	1	1
20		GND	Ground	1	1
21	CML-O	Rx2n	Receiver Inverted Data Output	3
22	CML-O	Rx2p	Receiver Non-Inverted Data Output	3
23		GND	Ground	1	1
24	CML-O	Rx4n	Receiver Inverted Data Output	3
25	CML-O	Rx4p	Receiver Non-Inverted Data Output	3
26		GND	Ground	1	1
27	LVTTL-O	ModPrsL	Module Present	3
28	LVTTL-O	IntL	Interrupt	3
29		VccTx	+3.3 V Power Supply transmitter	2	2
30		Vcc1	+3.3 V Power Supply	2	2
31	LVTTL-I	LPMode	Low Power Mode	3
32		GND	Ground	1	1
33	CML-I	Tx3p	Transmitter Non-Inverted Data Input	3
34	CML-I	Tx3n	Transmitter Inverted Data Output	3
35		GND	Ground	1	1
36	CML-I	Tx1p	Transmitter Non-Inverted Data Input	3
37	CML-I	Tx1n	Transmitter Inverted Data Output	3
38		GND	Ground	1	1
Note 1: GND is the symbol for signal and supply (power) common for the QSFP28 module. All are common within the QSFP28 module and all module voltages are referenced to this potential unless otherwise noted. Connect these directly to the host board signal-common ground plane.
Note 2: Vcc Rx, Vcc1 and Vcc Tx are the receiver and transmitter power supplies and shall be applied concurrently. Requirements defined for the host side of the Host Edge Card Connector are listed in MSA. The connector pins are each rated for a maximum current of 1000 mA.