LPWSMB31-S50C

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APPLICATIONS

l 400Gb/s Ethernet

l Data Center

l InfiniBand interconnects Compliance

l QSFP-DD MSA.

l IEEE802.3bs

l CMIS5.2

Ordering information

Part NO.	Bit Rate (Gbps)	Laser (nm)	Distance(m)	Media	DDMI	Connector	Temp（℃）
ESWSMB31-S50C	425	1310	500	SMF	YES	MPO-12（APC）	0~70

I. General Description

ESWSMB31-S50C is a Sillicon Photonics 400G(4x100G)DR4 transceiver. ESWSMB31-S50C is a fully integrated, 425Gb/s optical transceiver for SMF links up to 500m. ESWSMB31-S50C transmits data in compliance with the optical interface specification IEEEStd802.3-2018 Section 8 400GBASE-DR4. 400GBASE-DR4 specifies the use of 4-level pulse amplitude modulation (PAM4) at 53.125GBand operating at four parallel channels with wavelength on the range of 1304.5-1317.5nm. The bit rate per lane is 106.25Gb/s, which produces an aggregate data rate of 425Gb/s by meas PSM to the transmit ports of the MPO-12 connector. The received optical lanes are paralleled from the receive MPO-12 connector ports to PIN-PD built in PIC (Photonic Integrated Circuit) to recover the PAM4 for interfacing with the electrical interface via with transimpedance amplifier (TIA) surfaced-mounted to PIC.

II. Pin Diagram

III. Pin Descriptions

Pad	Symbol	Description	Ref.
1	GND	Ground
2	Tx2n	Transmitter Inverted Data Input
3	Tx2p	Transmitter Non-Inverted Data Input
4	GND	Ground
5	Tx4n	Transmitter Inverted Data Input
6	Tx4p	Transmitter Non-Inverted Data Input
Pad	Symbol	Description	Ref.
7	GND	Ground
8	ModSelL	Module Select
9	ResetL	Module Reset
10	VccRx	+3.3V Power Supply Receiver
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
17	Rx1p	Receiver Non-Inverted Data Output
18	Rx1n	Receiver Inverted Data Output
19	GND	Ground
20	GND	Ground
21	Rx2n	Receiver Inverted Data Output
22	Rx2p	Receiver Non-Inverted Data Output
23	GND	Ground
24	Rx4n	Receiver Inverted Data Output
25	Rx4p	Receiver Non-Inverted Data Output
26	GND	Ground
27	ModPrsL	Module Present
28	IntL	Interrupt
29	VccTx	+3.3V Power supply transmitter
30	Vcc1	+3.3V Power supply
31	LPMode	Low Power mode;
32	GND	Ground
33	Tx3p	Transmitter Non-Inverted Data Input
34	Tx3n	Transmitter Inverted Data Input
35	GND	Ground
36	Tx1p	Transmitter Non-Inverted Data Input
37	Tx1n	Transmitter Inverted Data Input
38	GND	Ground
39	GND	Ground
40	Tx6n	Transmitter Inverted Data Input
41	Tx6p	Transmitter Non-Inverted Data Input
42	GND	Ground
43	Tx8n	Transmitter Inverted Data Input
44	Tx8p	Transmitter Non-Inverted Data Input
Pad	Symbol	Description	Ref.
45	GND	Ground
46	Reserved	For future use
47	VS1	Module Vendor Specific 1
48	VccRx1	3.3V Power Supply
49	VS2	Module Vendor Specific 2
50	VS3	Module Vendor Specific 3
51	GND	Ground
52	Rx7p	Receiver Non-Inverted Data Output
53	Rx7n	Receiver Inverted Data Output
54	GND	Ground
55	Rx5p	Receiver Non-Inverted Data Output
56	Rx5n	Receiver Inverted Data Output
57	GND	Ground
58	GND	Ground
59	Rx6n	Receiver Inverted Data Output
60	Rx6p	Receiver Non-Inverted Data Output
61	GND	Ground
62	Rx8n	Receiver Inverted Data Output
63	Rx8p	Receiver Non-Inverted Data Output
64	GND	Ground
65	NC	No Connect
66	Reserved	For future use
67	VccTx1	3.3V Power Supply
68	Vcc2	3.3V Power Supply
69	Reserved	For future use
70	GND	Ground
71	Tx7p	Transmitter Non-Inverted Data Input
72	Tx7n	Transmitter Inverted Data Input
73	GND	Ground
74	Tx5p	Transmitter Non-Inverted Data Input
75	Tx5n	Transmitter Inverted Data Input
76	GND	Ground

IV. Absolute Maximum Ratings

Parameter	Symbol	Min.	Typ.	Max.	Unit	Ref.
Storage Temperature	T_S	-40		85	ºC
Case Operating Temperature	Top	0		70
Storage Relative Humidity	H_A	0		85	%	1
Supply Voltage	V_CC	0		3.6	V
Receiver Damage Threshold,per Lane	PRdmg			5.0	dBm

Note:

1.Non-condensation.

V. Recommended Operating Conditions

Data Rate Spcifications	Symbol	Min.	Typ.	Max.	Unit	Ref.
Power Supply Voltage	Vcc	3.135	3.3	3.465	V
Bit Rate	BR			425	Gbps
Operating Case Temperature	Tc	0		70	℃
Relative Humidity	H_A	5		85	%	1
Supply Current	Icc			3182	mA
Total Power Consumption	PC			10.5	W

Note:

1.Non-condensation.

VI. Optical Characteristics

Parameter	Symbol	Min.	Typ.	Max.		Unit	Ref.
*Transmitter(per lane)*
Channel data rate	FDC	106.25				Gb/s
Data rate per lane	F_SG	53.125				Gb/s	PAM4
Center Wavelength	λ_C	1304.5	1311	1317.5		nm
RMS Spectral Width	σ			0.6		nm	1
*Receiver(per lane)*
Damage threshold		5				dBm	2
Average receive power, each lane		–5.9		4.0		dBm	3
Receiver reflectance	Rr			-26		dB
Receiver sensitivity(OMA outer), each lane	SEN	Max(-3.9,SECQ-5.3)				dBm	4
Stressed receiver sensitivity (OMA outer), each lane	SRS				-1.9	dBm
Receiver Loss of Signal Indicator Assert Level	LOSA	-15		-7.9		dBm
Receiver Loss of Signal Indicator De-assert Level	LOSD			-7.5		dBm
Hysteresis	LOSH	0.5		5		dB

Notes:

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

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

3. Average receive power, each lane (min) is 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.

4. Receiver sensitivity is informative and is defined for a transmitter with a value of SECQ. Measured with conformance test signal at TP3 for BER=2.4E-4 Pre-FEC.

VII. Electrical Interface Characteristics

Parameter	Symbol	Min.	Typ.	Max.	Unit	Ref.
Supply Voltage	V_CC1, V_CCT_X, V_CCR_X	3.135		3.465	V
Power Dissipation	Pd			10.5	W
*Transmitter(per Lane)*
Input different impedance	R_in	90	100	110	Ω
Input Logic Level High	-	2		Vcc	V
Input Logic Level Low	-	0		0.8	V
Differential data input swing	Vin,pp			880	mVpp
*Receiver (per Lane)*
Error Bit Rate	BER			2.4E-4
Output different impedance	R_out	90	100	110	Ω
Output Logic Level High	-	Vcc-0.5		Vcc	V
Output Logic Level Low	-	0		0.4	V
Differential data Output swing	Vout,pp			900	mVpp

VIII.Functional Block Didgram

IX. Digital Diagnostic Monitor Accuracy

The following characteristics are defined over recommended operating conditions.

Parameter	Accuracy	Unit
Internally Measured Transceiver Temperature	+/-3	℃
Internally Messured Transceiver Supply Voltage	+/-3	%
Measured Tx Bias Current	+/-10	%
Measured Tx Output Power	+/-3	dB
Measured Rx Received Average Optical Power	+/-3	dB

X. Mechanical Specifications (Unit: mm)

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