100G QSFP28 PSM4

100G QSFP28 PSM4 Features
Four-channel full-duplex transceiver modules
Transmission data rate up to 26Gbit/s per channel
Up to 2km transmission of single mode fiber
Low power consumption <3.5W
Operating case temperature 0°C to +70°C
3.3V power supply voltage
RoHS 6 compliant
Hot Pluggable QSFP28 form factor
Single MPO connector receptacle
Built-in digital diagnostic function

100G QSFP28 PSM4 Applications
100G Ethernet
Proprietary High Speed Interconnections
Data center

Absolute Maximum Ratings
The operation in excess of any absolute maximum ratings might cause permanent damage to this module.

Parameter	Symbol	Min	Max	Unit	Note
Storage Temperature	TST	-40	85	degC
Relative Humidity(non-condensing)	RH	0	85	%
Operating Case Temperature	TOPC	0	70	degC
Supply Voltage	VCC	-0.3	3.6	V
Input Voltage	Vin	-0.3	Vcc+0.3	V

Recommended Operating Conditions and Supply Requirements

Parameter	Symbol	Min	Typical	Max	Unit
Operating Case Temperature	TOPC	0		70	degC
Power Supply Voltage	VCC	3.13	3.3	3.47	V
Power Consumption		–		3.5	W
Data Rate	DR		25.78125		Gbps
Data Speed Tolerance	∆DR	-100		+100	ppm
Link Distance with G.652	D	0		2	km

Optical Characteristics
All parameters are specified under the recommended operating conditions with PRBS31 data pattern unless otherwise specified.

Symbol

Min

Typical

Max

Unit

Notes

Transmitter

λC

129 5

1310

132 5

nm

1

λrms

–

3.5

nm

1

PAVG

-5

-0.5

+2.5

dBm

POMA

-5

-0.5

+2.5

dBm

1

Ptx,diff

5.0

dB

between any two lanes

Launch Power in OMA minus Transmitter and Dispersion Penalty (TDP), each Lane

OMA-TD P

-2.3

dBm

1

Rise/Fall Time

Tr/Tf

ps

Extinction Ratio

ER

3.5

dB

Relative Intensity Noise

Rin

dB/Hz

Optical Return Loss Tolerance

TOL

dB

Transmitter Reflectance

RT

dB

Transmitter Eye Mask Margin

EMM

10

%

2

Average Launch Power OFF Transmitter, each Lane

Poff

dBm

Transmitter Eye Mask Definition {X1, X2, X3, Y1, Y2, Y3}

{0.2 3, 0.34, 0.43, 0.26, 0.36, 0.4}

Parameter

Symbol

Min

Typical

Unit

Notes

Center Wavelength

λC

1290

1310

nm

Damage Threshold

THd

+3

dBm

Overload, each lane

OVL

+2

dBm

Receiver Sensitivity in OMA, each Lane

SEN

dBm

3

Signal Loss Assert Threshold

LOSA

-30

dBm

Signal Loss Deassert Threshold

LOSD

dBm

LOS Hysteresis

LOSH

0.5

dB

Optical Return Loss

ORL

dBm

Notes:

1. Transmitter wavelength, RMS spectral width and power need to meet the OMA minus TDP specs to guarantee link performance.
2. The eye diagram is tested with 1000 waveform.
3. Measured with conformance test signal at receiver input for BER = 1×10-12.

Electrical Specifications

Parameter	Symbol	Min	Typical	Max	Unit
Differential input impedance	Zin	90	100	110	ohm
Differential Output impedance	Zout	90	100	110	ohm
Differential input voltage amplitude	ΔVin	300		1100	mVp-p
Differential output voltage amplitude	ΔVout	500		800	mVp-p
Bit Error Rate	BR			E-12
Input Logic Level High	VIH	2.0		VCC	V
Input Logic Level Low	VIL	0		0.8	V
Output Logic Level High	VOH	VCC-0.5		VCC	V
Output Logic Level Low	VOL	0		0.4	V

Pin Descriptions

PIN	Logic		Symbol		Name/Description
1			GND		Ground
2	CML-I		Tx2n		Transmitter Inverted Data Input
3	CML-I		Tx2p		Transmitter Non-Inverted Data output
4			GND		Ground
5	CML-I		Tx4n		Transmitter Inverted Data Input
6	CML-I		Tx4p		Transmitter Non-Inverted Data output
7			GND		Ground
8	LVTLL-I		ModSelL		Module Select
9	LVTLL-I		ResetL		Module Reset
10			VccRx		﹢3.3V Power Supply Receiver
11	LVCMOS-I/O		SCL		2-Wire Serial Interface Clock
12	LVCMOS-I/O		SDA		2-Wire Serial Interface Data
13			GND		Ground
14	CML-O		Rx3p		Receiver Non-Inverted Data Output
15	CML-O		Rx3n		Receiver Inverted Data Output
16			GND		Ground
17	CML-O		Rx1p		Receiver Non-Inverted Data Output
18	CML-O		Rx1n		Receiver Inverted Data Output
19			GND		Ground
		GND		Ground		1
CML-O		Rx2n		Receiver Inverted Data Output
CML-O		Rx2p		Receiver Non-Inverted Data Output
		GND		Ground		1
CML-O		Rx4n		Receiver Inverted Data Output		1
CML-O		Rx4p		Receiver Non-Inverted Data Output
		GND		Ground		1
LVTTL-O		ModPrsL		Module Present
LVTTL-O		IntL		Interrupt
		VccTx		+3.3 V Power Supply transmitter		2
		Vcc1		+3.3 V Power Supply		2
LVTTL-I		LPMode		Low Power Mode
		GND		Ground		1
CML-I		Tx3p		Transmitter Non-Inverted Data Input
CML-I		Tx3n		Transmitter Inverted Data Output
		GND		Ground		1
CML-I		Tx1p		Transmitter Non-Inverted Data Input
CML-I		Tx1n		Transmitter Inverted Data Output
		GND		Ground		1

Notes:

1. Module circuit ground is isolated from module chassis ground within the module. GND is the symbol for signal and supply (power) common for QSFP28 modules.
2. The connector pins are each rated for a maximum current of 500mA.

ModSelL Pin
The ModSelL is an input pin. When held low by the host, the module responds to 2-wire serial communication commands. The ModSelL allows the use of multiple QSFP28 modules on a single 2-wire interface bus. When the ModSelL is “High”, the module will not respond to any 2-wire interface communication from the host. ModSelL has an internal pull-up in the module.
ResetL Pin
Reset. LPMode_Reset has an internal pull-up in the module. A low level on the ResetL pin for longer than the minimum pulse length (t_Reset_init) initiates a complete module reset, returning all user module settings to their default state. Module Reset Assert Time (t_init) starts on the rising edge after the low level on the ResetL pin is released. During the execution of a reset (t_init) the host shall disregard all status bits until the module indicates a completion of the reset interrupt. The module indicates this by posting an IntL signal with the Data_Not_Ready bit negated. Note that on power up (including hot insertion) the module will post this completion of reset interrupt without requiring a reset.
LPMode Pin
Huihongfiber PSM4 operate in the low power mode (less than 1.5 W power consumption) This pin active high will decrease power consumption to less than 1W.
ModPrsL Pin
ModPrsL is pulled up to Vcc on the host board and grounded in the module. The ModPrsL is asserted “Low” when the module is inserted and deasserted “High” when the module is physically absent from the host connector.
IntL Pin
IntL is an output pin. When “Low”, it indicates a possible module operational fault or a status critical to the host system. The host identifies the source of the interrupt by using the 2-wire serial interface. The IntL pin is an open collector output and must be pulled up to Vcc on the host board.
Power Supply Filtering
The host board should use the power supply filtering shown in Figure1.

Figure1. Host Board Power Supply Filtering
Optical Interface Lanes and Assignment
The optical interface port is a male MPO connector .The four fiber positions on the left as shown in Figure 2, with the key up, are used for the optical transmit signals (Channel 1 through4). The fiber positions on the right are used for the optical receive signals (Channel 4 through 1). The central four fibers are physically present.

Figure 2. Optical Receptacle and Channel Orientation
Diagnostic Monitoring Interface
Digital diagnostics monitoring function is available on all Huihongfiber QSFP28 PSM4. A 2-wire serial interface provides user to contact with module. The structure of the memory is shown in Figure 3. The memory space is arranged into a lower, single page, address space of 128 bytes and multiple upper address space pages. This structure permits timely access to addresses in the lower page, such as Interrupt Flags and Monitors. Less time critical time entries, such as serial ID information and threshold settings, are available with the Page Select function. The interface address used is A0xh and is mainly used for time critical data like interrupt handling in order to enable a one-time-read for all data related to an interrupt situation. After an interrupt, IntL, has been asserted, the host can read out the flag field to determine the affected channel and type of flag.

Parameter	Symbol	Min	Max	Unit	Notes
Temperature monitor absolute error	DMI_Temp	-3	+3	degC	Over operating temp
Supply voltage monitor absolute error	DMI _VCC	-0.1	0.1	V	Full operating range
Channel RX power monitor absolute error	DMI_RX	-3	3	dB	Per channel
Channel Bias current monitor	DMI_Ibias	-10%	10%	mA	Per channel
Channel TX power monitor absolute error	DMI_TX	-3	3	dB	Per channel

Figure 3

EEPROM Serial ID Memory Contents:

Data Address (Dec)	Name of Field	Description	Value(Hex)
Base ID Fields
128	Identifier	QSFP28	0E
129	Extended Identifier	3.5W max. power consumption	CC
130	Connector type	MPO Fiber Connector	0C
131	Transceiver Application supported	Reserved	80
132		0
133		0
134		Reserved	0
135		Intermediate distance	20
136		Shortwave laser w/o OFC (SN)	10
137		Single Mode (SM)	01

 

138		1200 Mbytes/Sec	80
139	Encoding	NRZ	03
140	BR, nominal	Nominal bit rate	67
141	Rate Select	QSFP28 Rate Select Version 1	0
142	Link Length(Standard SM Fiber)	2KM	2
143	Link Length(OM3)	Not supported	0
144	Link Length(OM2)	Not supported	0
145	Link Length(OM1)	Not supported	0
146	Link Length(Cooper)	Not supported	0
147	Device Tech	Uncooled transmitter device;1310nm DFB; No wavelength control; PIN detector; Transmitter not tunable	40
148	Vendor Name	HUIHONGFIBER
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164	Electronic or optical interfaces for InfiniBand	4x     SDR Speed(2.5Gb/s),DDR Speed(5.0Gb/s),QDR Speed(10Gb/s).	7
165	Vendor OUI	00	00
166		00	00
167		00	00

 

168	Vendor PN
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184	Vendor Rev	REV.1A	31
185			41
186	Wavelength	1310nm	66
187			58
188	Wavelength Tolerance	±15	0B
189			B8
190	Max Case Temp	Max Case Temp 70°C	46
191	Check Sum	Address 128-190
Extended ID Fields
192	Options Module circuit	Rate Select, TX Disable, TX Fault, LOS, Warning indicators for: Temperature, VCC, RX power, TX Bias	0
193			0
194			0
195			DE
196	Vendor SN	Serial number provided by vendor(ASCII)
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212	Date Code	Programmed with manufacturing date
213
214
215
216
217
218	Lot Number	Programmed with manufacturing lot
219
220	Diagnostic Monitoring Type		8
221	Enhanced Options		0
222	Reserved	Reserved	Reserved
223	CC_EXT	Address 192-222
Vendor Specific ID Fields
224-255	Vendor Specific EEPROM

Mechanical Dimensions
Figure 4.

Attention: To minimize MPO connection induced reflections, an MPO receptacle with 8-degree angled end-face is utilized for this product. A male MPO connector with 8-degree end-face should be used with this product as illustrated in Figure 5.

Figure 5.
ESD
This transceiver is specified as ESD threshold 1KV for high speed data pins and 2KV for all others    electrical      input      pins,      tested    per       MIL-STD-883,      Method 3015.4 /JESD22-A114-A (HBM).     However, normal ESD precautions are still required during the handling of this module. This transceiver is shipped in ESD protective packaging. It should be removed from the packaging and handled only in an ESD protected environment.
Laser Safety
This is a Class 1 Laser Product according to IEC 60825-1:2007. This product complies with 21 CFR 1040.10 and 1040.11 except for deviations pursuant to Laser Notice No. 50, dated (June 24, 2007)