400G OSFP SR4 FLT 50m Transceiver

Ascent’s OSFP-400G-SR4A05 is a 400Gb/s Octal Small Form-factor Pluggable (OSFP) optical module without a top open fin designed for 50m with OM4 fiber optical communication applications. The module converts 4 channels of 100Gb/s (PAM4) electrical input data to 4 channels of parallel optical signals, each capable of 100Gb/s operation for an aggregate data rate of 400Gb/s. Reversely, on the receiver side, the module converts 4 channels of parallel optical signals of 100Gb/s each channel for an aggregate data rate of 400Gb/s into 4 channels of 100Gb/s (PAM4) electrical output data. MPO-12 connector can be plugged into the OSFP112 SR4 module jack with 4 channels. Proper alignment is ensured by the guide pins inside the receptacle. The cable usually cannot be twisted for proper channel-to-channel alignment. The electrical connection is achieved through an OSFP MSA-compliant edge-type connector. The I2C interface is supported to read and control the status of this product.

· OSFP form factor hot pluggable

· CMIS compliance

· 4 parallel lanes of 100G-PAM4 electrical and optical parallel lanes

· Optical port of MPO-12/APC

· Up to 50m reach on multi-mode fiber OM4 and 30m on OM3 with FEC

· 9 Watts max

· Case temperature range of 0°C to 70°C

· Adaptive Tx input equalization

· Programmable Rx output amplitude, Rx output pre-cursor, Rx output post-cursor

· Supply voltage monitoring (DDM_Voltage)

· Transceiver case temperature monitoring (DDM_Temperature)

· Tx transmit optical power monitoring for each lane (DDM_TxPower)

· Tx bias current monitoring for each lane (DDM_TxBias)

· Rx receive optical power monitoring for each lane (DDM_RxPower)

· Warning and alarm indication for each DDM function

· Tx & Rx LOL and LOS indication

· Tx fault indication

· Host and line side loopback capabilities

· Host and line side PRBS generator and checker capabilities

· CDB firmware upgrade capability

· Versatile diagnostics monitoring (VDM) capability (optional, additional power consumption increase)

· Other functions defined in CMIS

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.	Max.	Unit	Note
Storage Temperature	T_S	-40	85	°C
Operating Case Temperature	T_OP	0	70	°C
Power Supply Voltage	V_CC	-0.5	3.6	V
Relative Humidity (non-condensation)	RH	0	85	%

Recommended Operating Conditions

Parameter	Symbol	Min.	Typ.	Max.	Unit	Note
Operating Case Temperature	T_OP	0		70	°C
Power Supply Voltage	V_CC	3.135	3.3	3.465	V
Data Rate, each Lane			53.125		GBd	PAM4
Data Rate Accuracy		-100		100	ppm
Pre-FEC Bit Error Ratio				2.4x10^-4
Post-FEC Bit Error Ratio				1x10^-1²		1
Link Distance	D	2		50	m	2

Notes:

1. FEC provided by host system.

2. FEC required on host system to support maximum transmission distance.

Electrical Characteristics

The following electrical characteristics are defined over the Recommended Operating Environment unless otherwise specified.

Parameter	Symbol	Min.	Typ.	Max.	Unit	Note
Power Consumption				9.0	W
Supply Current	Icc			2.87	A
Transmitter (each Lane)
Signaling Rate, each Lane	TP1	53.125 ± 100 ppm			GBd
Differential pk-pk Input Voltage Tolerance	TP1a	750			mV
Peak-to-Peak AC Common-mode Voltage Tolerance Low-frequency, VCMLF Full-Band, VCMFB	TP1a	32			mV
		80

Differential-Mode to Common-Mode Return Loss, RLcd	TP1	IEEE 802.3ck Equation (120G– 2)			dB
Differential-Mode to Common-Mode Return Loss, RLcd


Effective Return Loss, ERL	TP1	8.5			dB
Differential Termination Mismatch	TP1a			10	%
Module Stressed Input Tolerance	TP1a	IEEE802.3ck 120G.3.4.3			V
Single-Ended Voltage Tolerance Range	TP1	-0.4 to 3.3			mV
Single-Ended Voltage Tolerance Range		-0.4 to 3.3
DC Common-Mode Voltage Tolerance Upper limit Lower limit	TP1	2.85			V
		-0.35

Receiver (each Lane)
Signaling Rate, each Lane	TP4	53.125 ± 100 ppm			GBd
					GBd
Peak-to-Peak AC Common- Mode Voltage Low-Frequency, VCMLF Full-Band, VCMFB	TP4			32	mV
				80

Differential Peak-to-Peak Output Voltage Short Mode Long Mode	TP4			600	mV
				845

Eye Height	TP4	15			mV
Vertical Eye Closure, VEC	TP4			12	dB
Common-Mode to Differential-Mode Return Loss, RLdc	TP4	IEEE802.3ck Equation (120G– 1)			dB
Common-Mode to Differential-Mode Return Loss, RLdc		IEEE802.3ck Equation (120G– 1)
Effective Return Loss, ERL	TP4	8.5			dB
Differential Termination Mismatch	TP4			10	%
Transition Time	TP4	8.5			ps
DC Common-Mode Voltage Tolerance Upper Limit Lower Limit	TP4	2.85			mV
		-0.35

Optical Characteristics

Parameter	Symbol	Min.	Typ.	Max.	Unit	Note
Transmitter
Data Rate, each Lane		53.125 ± 100 ppm			GBd
Modulation Format		PAM4
Wavelength	λ	842		948	nm
RMS Spectral Width Average Launch Power, each Lane				0.65	nm	1
RMS Spectral Width Average Launch Power, each Lane	P_AVG	-4.6		4	dBm
Outer Optical Modulation Amplitude (OMAouter), each Lane	P_OMA	-2.6(For max (TECQ, TDECQ) ≤ 1.8 dB) -4.4 +max(TECQ, TDECQ) ( For 1.8 ＜max (TECQ, TDECQ) ≤ 4.4 dB)		3.5	dBm
Outer Optical Modulation Amplitude (OMAouter), each Lane

Transmitter and Dispersion Eye Closure for PAM4 (TDECQ), each Lane	TDECQ			4.4	dB

Transmitter Eye Closure for PAM4, each Lane	TECQ			4.4	dB
Transmitter Eye Closure for PAM4, each Lane	TECQ
Overshoot/Undershoot				29	%
Transmitter Power Excursion, each Lane		2.5		2.3	dBm
Extinction Ratio	ER	2.5			dB
Transition Time	Tt			17	ps
Average Launch Power of OFF Transmitter, each Lane	Poff			-30	dBm
Average Launch Power of OFF Transmitter, each Lane
RIN14 OMA	RIN			-132	dB/Hz
Optical Return Loss Tolerance	TOL			14	dB
Encircled Flux		≥ 86% at 19 μm ≤ 30% at 4.5 μm				2
		≥ 86% at 19 μm ≤ 30% at 4.5 μm
Receiver
Data Rate, each Lane		53.125 ± 100 ppm			GBd
Modulation Format		PAM4
Center Wavelength	λ	842		948	Nm
Damage Threshold, each Lane	THd	5			dBm	3
Average Receive Power, each Lane		-6.3		4	dBm	4
Receive Power (OMAouter), each Lane				3.5	dBm
Receiver Reflectance	RR			-15	dB
Receiver Sensitivity OMAouter), each Lane	SEN			-4.4(For TECQ ≤ 1.8 dB ) – 6.2 + TECQ ( For 1.8＜TECQ ≤ 4.4 dB)	dBm	5


Stressed Receiver Sensitivity (OMAouter), each Lane	SRS			-1.8	dBm	6
Stressed Receiver Sensitivity (OMAouter), each Lane					dBm
LOS Assert	L_OSA	-15			dBm
LOS De-assert	L_OSD			-9.2	dBm
LOS Hysteresis	L_OSH	0.5			dB
Conditions of Stress Receiver Sensitivity Test (Note 7)
Stressed Eye Closure for PAM4 (SECQ), Lane under Test			4.4		dB
Stressed Eye Closure for PAM4 (SECQ), Lane under Test
OMAouter of each Aggressor Lane			3.5		dBm

Notes:

1. RMS spectral width is the standard deviation of the spectrum.

2. If measured into type A1a.2 or type A1a.3, or A1a.4, 50 μm fiber, by IEC 61280- 1-4.

3. The receiver shall be able to tolerate, without damage, continuous exposure to a modulated optical input signal having this power level on one lane. The receiver does not have to operate correctly at this input power.

4. Average receive power, each lane (min) is informative and not the principal indicator of signal strength. A received power below this value cannot be compliant; however, a value above this does not ensure compliance.

5. Receiver sensitivity (OMAouter ) is informative and is defined for a transmitter with a value of TECQ up to 4.4 dB. Receiver sensitivity should meet Equation (1), which is illustrated in below figure.

RS = max (−4.4, TECQ – 6.2) dBm (1)

Where:

RS is the receiver sensitivity, and

TECQ is the TECQ of the transmitter used to measure the receiver sensitivity.

6. Measured with conformance test signal at TP3 for the BER equal to 2.4x10^-4.

7. These test conditions are for measuring stressed receiver sensitivity. They are not characteristics of the receiver.

Digital Diagnostic Functions

Parameter	Symbol	Min.	Max.	Unit	Note
Temperature Monitor Absolute Error	DMI_Temp	-3	3	°C	Over operating temperature range
					Over operating temperature range
Supply Voltage Monitor Absolute Error	DMI _VCC	-0.1	0.1	V	Over full operating range
					Over full operating range
Channel RX Power Monitor Absolute Error	DMI_RX_Ch	-2	2	dB	1
Channel Bias Current Monitor	DMI_Ibias_Ch	-10%	10%	mA
Channel TX Power Monitor Absolute Error	DMI_TX_Ch	-2	2	dB	1

Notes:

1. Due to measurement accuracy of different single mode fibers, there could be an additional +/-1 dB fluctuation, or a +/- 3 dB total accuracy.

ESD

This transceiver is specified as ESD threshold 1kV for high speed data pins and 2kV for all other 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 I Laser Product, or Class 1 Laser Product according to IEC/EN 60825-1:2014.
This product complies with 21 CFR 1040.10 and 1040.11 except for conformance with IEC 60825-1 Ed. 3., as described in Laser Notice No. 56, dated May 8, 2019.
Caution: Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.