CWDM Module

Model NO.: QSFP28-100G-ER4
Delivery: FOB/EXW
Minimum order quantity: 1 piece
Supply Ability: 5000 piece / Day
Country of Origin: CHINA
Stock Time: 3-5 Days

Quantity:

Product Description

Features

Compliant with 100GBASE-ER4
Support line rates from 103.125 Gbps to 111.81 Gbps
Integrated LAN WDM TOSA / APD ROSA for up to 40 km reach
Digital Diagnostics Monitoring Interface
Duplex LC optical receptacle
No external reference clock
Electrically hot-pluggable
Compliant with QSFP28 MSA with LC connector
Case operating temperature range:0°C to 70°C
Power dissipation < 4.0 W

Applications

Ethernet 100GBASE-ER4 Lite
ITU-T OTU4
Fiber Channel
Switch to Switch interface
Switched backplane applications
Router/Server interface
Other optical transmission systems

Standard

Compliant to IEEE 802.3ba
Compliant with QSFP+ MSA
Compliant to SFF-8436

Description

QSFP28-100G-ER4 is a 100Gbps transceiver module designed for optical communication applications compliant to Ethernet 100GBASE-ER4 Lite standard. The module converts 4 input channels of 25Gbps electrical data to 4 channels of LAN WDM optical signals and then multiplexes them into a single channel for 100Gbps optical transmission. Reversely on the receiver side, the module de-multiplexes a 100Gbps optical input into 4 channels of LAN WDM optical signals and then converts them to 4 output channels of electrical data.

The central wavelengths of the 4 LAN WDM channels are 1295.56, 1300.05, 1304.58 and 1309.14 nm as members of the LAN WDM wavelength grid defined in IEEE 802.3ba. The high performance cooled LAN WDM EA-DFB transmitters and high sensitivity APD receivers provide superior performance for 100Gigabit Ethernet applications up to 30km links without FEC and 40km links with FEC.

The product is designed with form factor, optical/electrical connection and digital diagnostic interface according to the QSFP+ Multi-Source Agreement (MSA). It has been designed to meet the harshest external operating conditions including temperature, humidity and EMI interference.

Specification

Absolute Maximum Ratings
Parameter	Symbol	Min	Max	Unit
Storage Ambient Temperature	T_STG	-40	85	℃
Operating Humidity	H_O	5	95	%
Power Supply Voltage	Vcc	-0.5	3.6	V
Damage Threshold, each Lane	THd	-3		dBm

Recommended Operating Conditions
Parameter	Symbol	Min	Typical	Max	Unit
Operating Case Temperature	Tc	0		70	℃
Power Supply Voltage	Vcc	3.135	3.3	3.465	V
Power Supply Current	ICC			1200	mA
Data Rate,each Lane			25.78125		Gbps
Control Input Voltage High		2		Vcc	V
Control Input Voltage Low		0		0.8	V
Data Rate Accuracy		-100		100	ppm
Link Distance with G.652 (without FEC)	D1	-		30	km

Electrical transmitter Characteristics
Parameter		Symbol		Min	Typical		Max		Unit	Notes
Power Consumption							4.5		W
Overload Differential Voltage pk-pk		TP1a		900					mV
Common Mode Voltage (Vcm)		TP1		-350			2850		mV
Differential Termination Resistance Mismatch		TP1					10		%
Differential Return Loss (SDD11)		TP1					See CEI- 28G-VSR Equation 13-19		dB
Common Mode to Differential conversion and Differential to Common Mode conversion (SDC11, SCD11)		TP1					See CEI- 28G-VSR Equation 13-20		dB
Stressed Input Test		TP1a		See CEI- 28G-VSR Section 13.3.11.2.1
Electrical receiver Characteristics
Parameter		Symbol		Min	Typical		Max		Unit	Notes
Differential Voltage, pk-pk		TP4					900		mV
Common Mode Voltage (Vcm)		TP4		-350			2850		mV
Common Mode Noise, RMS		TP4					17.5		mV
Differential Termination Resistance Mismatch		TP4					10		%
Differential Return Loss (SDD11)		TP4					See CEI- 28G-VSR Equation 13-19		dB
Common Mode to Differential conversion and Differential to Common Mode conversion (SDC22, SCD22)		TP4					See CEI- 28G-VSR Equation 13-21		dB
Common Mode Return Loss (SCC22)		TP4					-2		dB
Transition Time, 20 to 80%		TP4		9.5					ps
Vertical Eye Closure (VEC)		TP4					5.5		dB
Eye Width at 10-15 probability (EW15)		tr		0.57					UI
Eye Height at 10-15 probability (EH15)		tf		228					mV
Optical transmitter Characteristics
Parameter	Symbol		Min		Typical	Max		Unit		Notes
Launched Power (avg.)	Pavg		-2.9			4.5		dBm
Total Output. Power	Pout					10.5		dBm
OMA, each Lane	POMA		0.1			4.5		dBm
Difference in Launch Power between any Two Lanes (OMA)	Ptx,diff					3.6		dB
Launch Power in OMA minus Transmitter and Dispersion Penalty (TDP), each Lane			-0.65					dBm
Wavelength Assignment	λ0		1294.53		1295.56	1296.59		nm
	λ1		1299.02		1300.05	1301.09
	λ2		1303.54		1304.58	1305.63
	λ3		1308.09		1309.14	1310.19
TDP, each Lane	TDP					2.5		dB
Spectral Width(-20dB)	∆λ					1		nm
Side Mode Suppression Ratio	SMSR		30					dB
Extinction Ratio	ER		7					dB
Transmitter OFF Output Power	POff					-30		dBm
RIN20 OMA	RIN					-130		Ohm
Output Eye Mask definition {X1，X2，X3，Y1，Y2，Y3}	{0.25，0.4，0.45，0.25，0.28，0.4}

Optical receiver Characteristics
Parameter		Symbol	Min	Typical	Max	Unit	Notes
Damage Threshold, each Lane		THd	-3			dBm
Average Receive Power, each Lane			-16.9		-4.9	dBm	@30km
Average Receive Power, each Lane			-20.9		-4.9	dBm	@30km
Receive Power (OMA), each Lane					-1.9	dBm
Receiver Sensitivity (OMA), each Lane		SEN1			-14.65	dBm	For BER = 1x10^-12
Stressed Receiver Sensitivity (OMA), each Lane					-12.5	dBm	For BER = 1x10^-12
Receiver Sensitivity (OMA), each Lane		SEN2			-18.65	dBm	For BER =5x10^-⁵
Stressed Receiver Sensitivity (OMA), each Lane					-16.65	dBm	For BER =5x10^-⁵
Receiver reflectance					-26	dB
Difference in Receive Power between any Two Lanes (Average and OMA)		Ptx,diff			3.6	dB
LOS Hysteresis		LOSH	0.5			dB
LOS	Optical De-assert	Pd		-24		dBm
LOS	Optical Assert	Pa		-26		dBm
Receiver Electrical 3 dB upper Cutoff Frequency, each Lane		Fc			31	GHz
Vertical Eye Closure Penalty, each Lane					1.5	dB
Stressed Eye J2 Jitter, each Lane					0.3	UI
Stressed Eye J9 Jitter, each Lane					0.47	UI

Pin Definition

Figure1 QSFP MSA-compliant 38-pin connector

Pin	Symbol	Name/Description	Notes
1	GND	Transmitter Ground(Common with Receiver Ground)	1
2	TX2N	Transmitter Inverted Data Input
3	TX2P	Transmitter Non-Inverted Data Output
4	GND	Ground	1
5	TX4N	Transmitter Inverted Data Input
6	TX4P	Transmitter Non-Inverted Data Output
7	GND	Ground	1
8	ModSelL	Module Select
9	ResetL	Module Reset
10	Vcc Rx	+3.3 V Power supply receiver	2
11	SCL	2-wire serial interface clock
12	SDA	2-wire serial interface data
13	GND	Ground
14	RX3P	Receiver Non-Inverted Data Output
15	RX3N	Receiver Inverted Data Output
16	GND	Ground	1
17	RX1P	Receiver Non-Inverted Data Output
18	RX1N	Receiver Inverted Data Output
19	GND	Ground	1
20	GND	Ground	1
21	RX2N	Receiver Inverted Data Output
22	RX2P	Receiver Non-Inverted Data Output
23	GND	Ground	1
24	RX4N	Receiver Inverted Data Output	1
25	RX4P	Receiver Non-Inverted Data Output
26	GND	Ground	1
27	ModPrsL	Module Present
28	IntL	Interrupt
29	Vcc Tx	+3.3 V Power supply transmitter	2
30	Vcc1	+3.3 V Power Supply	2
31	LPMode	Low Power Mode
32	GND	Ground	1
33	TX3P	Transmitter Non-Inverted Data Input
34	TX3N	Transmitter Inverted Data Output
35	GND	Ground	1
36	TX1P	Transmitter Non-Inverted Data Input
37	TX1N	Transmitter Inverted Data Output
38	GND	Ground	1

Table 1: QSFP Module PIN Definition

Notes：

1. GND is the symbol for signal and supply (power) common for QSFP28 modules. 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.

2. VccRx, Vcc1 and VccTx are the receiving and transmission power suppliers and shall be applied concurrently. Recommended host board power supply filtering is shown in Figure 3 below. Vcc Rx, Vcc1 and Vcc Tx may be internally connected within the QSFP28 transceiver module in any combination. The connector pins are each rated for a maximum current of 1000mA.

Recommended Power Supply Filter

Functional Description

The transceiver module receives 4 channels of 25Gbpselectrical data, which are processed by a 4-channel Clock and Data Recovery (CDR) IC that reshapes and reduces the jitter of each electrical signal. Subsequently, EML laser driver IC converts each one of the 4 channels of electrical signals to an optical signal that is transmitted from one of the 4 cooled EML lasers which are packaged in the Transmitter Optical Sub-Assembly (TOSA). Each laser launches the optical signal in specific wavelength specified in IEEE 802.3ba 100GBASE-ER4 requirements. These 4-lane optical signals will be optically multiplexed into a single fiber by a 4-to-1 optical WDM MUX. The optical output power of each channel is maintained constant by an automatic power control (APC) circuit. The transmitter output can be turned off by TX_DIS hardware signal and/or 2-wire serial interface.

The receiver receives 4-lane LAN WDM optical signals. The optical signals are de-multiplexed by a 1-to-4 optical DEMUX and each of the resulting 4 channels of optical signals is fed into one of the 4 receivers that are packaged into the Receiver Optical Sub-Assembly (ROSA). Each receiver converts the optical signal to an electrical signal. The regenerated electrical signals are retimed and de-jittered and amplified by the RX portion of the 4-channel CDR. The retimed 4-lane output electrical signals are compliant with CEI-28G-VSR interface requirements. In addition, each received optical signal is monitored by the DOM section. The monitored value is reported through the 2-wire serial interface. If one or more received optical signal is weaker than the threshold level, RX_LOS hardware alarm will be triggered.

A single +3.3V power supply is required to power up this product. Both power supply pins VccTx and VccRx are internally connected and should be applied concurrently. As per MSA specifications the module offers 7 low speed hardware control pins (including the 2-wire serial interface): ModSelL, SCL, SDA, ResetL, LPMode, ModPrsL and IntL.

Module Select (ModSelL) is an input pin. When held low by the host, this product responds to 2-wire serial communication commands. The ModSelL allows the use of this product on a single 2-wire interface bus – individual ModSelL lines must be used.

Serial Clock (SCL) and Serial Data (SDA) are required for the 2-wire serial bus communication interface and enable the host to access the QSFP28 memory map.

The ResetL pin enables a complete reset, returning the settings to their default state, when a low level on the ResetL pin is held for longer than the minimum pulse length. During the execution of a reset the host shall disregard all status bits until it indicates a completion of the reset interrupt. The product indicates this by posting an IntL (Interrupt) signal with the Data_Not_Ready bit negated in the memory map. Note that on power up (including hot insertion) the module should post this completion of reset interrupt without requiring a reset.

Low Power Mode (LPMode) pin is used to set the maximum power consumption for the product in order to protect hosts that are not capable of cooling higher power modules, should such modules be accidentally inserted.

Module Present (ModPrsL) is a signal local to the host board which, in the absence of a product, is normally pulled up to the host Vcc. When the product is inserted into the connector, it completes the path to ground through a resistor on the host board and asserts the signal. ModPrsL then indicates its present by setting ModPrsL to a “Low” state.

Interrupt (IntL) is an output pin. “Low” indicates a possible operational fault or a status critical to the host system. The host identifies the source of the interrupt using the 2-wire serial interface. The IntL pin is an open collector output and must be pulled to the Host Vcc voltage on the Host board.

Transceiver Block Diagram

Regulatory Compliance

Feature	Test	Method
Electrostatic Discharge (ESD) to the Electrical Pins	MIL-STD-883E Method 3015.7	Class 1(>1000V for SFI pins, >2000Vfor other pins.)
Electrostatic Discharge (ESD) Immunity	IEC61000-4-2	Class 2(>4.0kV)
Electromagnetic Interference (EMI)	CISPR22 ITE Class B FCC Class B CENELEC EN55022 VCCI Class 1	Comply with standard
Immunity	IEC61000-4-3	Comply with standard
Eye Safety	FDA 21CFR 1040.10 and 1040.11 EN (IEC) 60825-1,2	Compatible with Class I laser Product