Ascent Communication Technology

64G SFP56 850nm 100m

The 64GBASE-SW SFP56 Optical Transceiver Module is a high-performance solution designed for short-reach fiber communication applications. Operating over multimode fiber (MMF) at an 850 nm wavelength, it supports data rates up to 64G and link distances of up to 100 meters. With its compact SFP56 form factor and LC duplex connector, the module provides a reliable, space-efficient interface for high-speed data transmission. Fully compliant with industry standards including SFF-8472, SFF-8431, SFF-8432, and FC-PI-8, this transceiver ensures seamless interoperability with a wide range of networking equipment. It features Digital Optical Monitoring (DOM) functions accessible via a 2-wire management interface, enabling real-time monitoring of critical operating parameters such as optical power, voltage, and temperature. These advanced diagnostics enhance system management, fault detection, and long-term reliability. Engineered for ease of use, the module is hot-swappable, allowing quick installation and replacement without disrupting network operations. Its blend of performance, compatibility, and flexibility makes it ideal for data centers, enterprise networks, and high-bandwidth storage environments where efficient short-distance connectivity is essential. With robust compliance and monitoring features, the 64GBASE-SW SFP56 transceiver delivers dependable high-speed optical performance in demanding environments.

· Supports 16GFC/32GFC/64GFC data rates

· Up to 100m transmission on multi-mode fiber

· VCSEL laser and PIN receiver

· 2-wire interface with integrated Digital Diagnostic Monitoring

· Hot-pluggable SFP footprint

· Compliant with SFP MSA with LC connector

· Single 3.3V power supply

· Power consumption < 1.5W

· Case operating temperature range: 0°C to 70°C

Absolute Maximum Ratings

Parameter	Symbol	Min.	Typ.	Max.	Unit
Storage Temperature	T_s	-40		85	°C
Relative Humidity	RH	0		85	%
Power Supply Voltage	V_CC	-0.3		3.63	V

Recommended Operating Conditions

Parameter	Min.	Typ.	Max.	Unit	Notes
Case Operating Temperature	0		70	°C
Power Supply Voltage	3.135	3.3	3.45	V
Power Supply Current				mA
64GFC Signaling Rate		28.9	GBd	GBd
32GFC Signaling Rate		28.05	GBd	GBd
16GFC Signaling Rate		14.025	GBd	GBd
64GFC Transmission Distance			70 (OM3) 100 (OM4/OM5)	m
32GFC Transmission Distance			20 (OM2) 70 (OM3) 100 (OM4)	m
16GFC Transmission Distance			35 (OM2) 100 (OM3) 125 (OM4)	m
64GFC Bit Error Rate		10^-10	1.09x10^-4		1
32GFC Bit Error Rate			10^-6		2
16GFC Bit Error Rate			10^-12		2
Coupled Fiber	Multi-mode fiber				50/125um MMF

Notes:
1. PRBS31Q for 64GFC.
2. PRBS31 for 32GFC/16GFC.

Optical Characteristics (64GFC Optical Parameters)

Parameter	Min.	Typ.	Max.	Unit	Notes
Transmitter (Module Output)
Center Wavelength	840	850	860	nm
RMS Spectral Width			0.6	nm
TDECQ			5.5	dB
TDECQ-10log10(Ceq)			5.5	dB
OMA_outer	-4.5		3	dBm
OMA_outer Extinction Ratio	3			dB
Launched Power in OMA_outerMinus TDECQ	-5.9			dBm
Average Launched Power	-7.5		0	dBm
RIN₁₂ OMA			-128	dB/Hz
Transition Time 20%-80%			34	ps
Encircled Flux	>86% at 19um, <30% at 4.5um
Receiver (Module Input)
Damage Threshold	5			dBm	1
Average Received Power	-9.4		4	dBm
Receiver Power (OMA_outer)			3	dBm
Return Loss of Receiver	12			dB
Receiver Sensitivity, OMA_outer			-7	dBm
Stressed Receiver Sensitivity, OMA_outer			-2.4	dBm
LOS De-Assert			-11	dBm
LOS Assert	-30		-11	dBm

Note: The receiver should be able to tolerate, without damage, continuous exposure to an optical input signal having this average power level. The receiver does not have to operate correctly at this received power.

32GFC Optical Parameters

Parameter	Min.	Typ.	Max.	Unit	Notes
Transmitter (Module Output)
Center Wavelength	840	850	860	nm
RMS Spectral Width			0.570	nm
Average Launched Power	0.240 (-6.2)		1.585 (2)	mW (dBm)
Optical Modulation Amplitude	0.479 (-3.2)			mW (dBm)
Vertical Eye Closure Penalty (VECP_q)			3.13	dB
RIN₁₂ OMA			-129	dB/Hz
Encircled Flux	>86% at 19um, <30% at 4.5um
Receiver (Module Input)
Average Received Power			1.585 (2)	mW (dBm)
Unstressed Receiver Sensitivity, OMA			0.095 (-10.2)	mW (dBm)
Return Loss of Receiver	12			dB
Rx Jitter Tracking Test, OMA	0.295(-5.3)			mW(dBm)
RX Jitter Tracking Test, Jitter Frequency and Pk-Pk Amplitude	(500,1) (100,5)			(kHz,UI)
Receiver Electrical 3 dB Upper Cutoff Frequency			32	GHz
Stressed Receiver Sensitivity, OMA			0.263 (-5.8)	mW (dBm)
LOS De-Assert			-11	dBm
LOS Assert	-30		-11	dBm

16GFC Optical Parameters (Compliant with all other parameters in FC-PI-5)

Parameter	Min.	Typ.	Max.	Unit	Notes
Transmitter (Module Output)
Center Wavelength	840	850	860	nm
RMS Spectral Width			0.59	nm
Average Launched Power	-7.8		0	dBm	1
Optical Modulation Amplitude	0.331 (-4.8)			mW (dBm)
Vertical Eye Closure Penalty (VECP_q)			2.56	dB
RIN₁₂ OMA			-128	dB/Hz
Encircled Flux	>86% at 19um, <30% at 4.5um
Receiver (Module Input)
Average Received Power			0	dBm
Unstressed Receiver Sensitivity, OMA			0.089 (-10.5)	mW (dBm)
Return Loss of Receiver	12			dB
Rx Jitter Tolerance Test, OMA	0.214(-6.7)			mW(dBm)
RX Jitter Tracking Test, Jitter Frequency and Pk-Pk Amplitude	(840,1) (168,5)			(kHz,UI)
Receiver Electrical 3dB Upper Cutoff Frequency			18	GHz
Stressed Receiver Sensitivity, OMA			0.170 (-7.7)	mW (dBm)
LOS De-Assert			-11	dBm
LOS Assert	-30		-11	dBm

Note: Max average launched power shall be the lesser of the value listed here or the Class 1 laser safety limits (CDRH and EN 60825).

Electrical Characteristics

Parameter	Symbol	Min.	Typ.	Max.	Unit	Notes
Power Supply Voltage	V_cc	3.135	3.3	3.465	V
Power Supply Current				454	mA
Low Speed Signals
Tx_Fault, Rx_LOS Output Voltage	V_OL	-0.3		0.40	V	At 0.7 mA
Tx_Disable, RS0, RS1 Input Voltage	V_IL	-0.3		0.8	V
Tx_Disable, RS0, RS1 Input Voltage	V_IH	2.0		V_cc+0.3	V

64G Electrical Parameters

Parameter	Min.	Typ.	Max.	Unit	Notes
Transmitter (Module Input)
Differential Input Voltage Tolerance	900			mV
Differential Termination Resistance Mismatch			10	%
Differential Return Loss SDD11				dB

Differential-Mode to Common Conversion SCD11				dB	At 0.7 mA
Input Equalization	-0.3		10	dB
Receiver (Module Output)
Differential Voltage, Pk-Pk			900	mV
Differential Voltage with Transmitter Disabled, Pk-Pk			35	mV
Common-Mode Noise Rms			17.5	mV
Differential Termination Resistance Mismatch			10	%	At 1 MHz
Differential Return Loss SDD22				dB
Common-Mode to Differential Conversion SDC22				dB
Source Transition Time 20% yto 80%	9.5			ps
Eye Width at 10^-5 Probability EW5	0.265			UI
Eye Height at 10^-5 Probability EH5	70			mV
Vertical Eye Closure VEC			12	dB
Output Emphasis			5	dB

32G Electrical Parameters

Parameter	Min.	Typ.	Max.	Unit	Notes
Transmitter (Module Input)
Differential Termination Resistance Mismatch			10	%
Differential Return Loss SDD11				%
Common Mode to Differential Conversion SDC11				dB
Differential Mode to Common Conversion SCD11
Input Equalization			10	dB
Receiver (module output)
Differential Voltage, Pk-Pk			900	mV
Common-Mode Noise Rms			17.5	mV
Differential Termination Resistance Mismatch			10	%	At 1 MHz
Differential Return Loss SDD22				%
Common Mode to Differential Conversion SDC22				dB
Differential Mode to Common Conversion SCD22				dB
Common Mode Return Loss SCC22			-2	dB
Source Transition Time 20% to 80%	9.5			ps
Vertical Eye Closure			4	dB
Eye Width at 10^-6 Probability EW6	0.65			UI
Eye Height at 10^-6 Probability EH6	250			mV
Output Emphasis			5	dB

16G Electrical Parameters (Compliant with all other parameters in FC-PI-5)

Parameter	Min.	Typ.	Max.	Unit	Notes
Transmitter (Module Input)
Common Mode Voltage (rms)			30	mV
Common Mode Voltage, (Spectral Peak)(rms)			20	mV
Input Equalization			10	dB
Receiver (module output)
Output Emphasis			5	dB

Timing Requirement of Control and Status I/O

Parameter	Symbol	Min.	Max.	Unit.	Notes
Tx_Disable Assert Time	t_off	—	100	μs
Tx_Disable Negate Time	t_on	—	2	ms
Time to Initialize 2-Wire Interface	t_2w_start_up	—	800	ms
Time to Initialize	t_start_up	—	2500	ms	1
Time to Power Up to Level II	t_power_level2	—	1700	ms	1
Time to Power Down from Level II	t_power_down	—	1700	ms	1
Tx_Fault Assert	Tx_Fault_on	—	1	ms
Tx_Fault Reset	t_reset	10	—	μs
RS0, RS1 Rate Select Timing for FC	t_RS0_FC,t_RS1_FC	—	4	ms
Rx_LOS Assert Delay	t_los_on	—	7	ms
Rx_LOS Negate Delay	t_los_off	—	7	ms

Note: Including TX DSP locking time.

Regulatory Compliance

Feature	Reference	Performance
Electrostatic discharge(ESD)	IEC/EN 61000-4-2	Compatible with standards
Electromagnetic Interference (EMI)	FCC Part 15 Class B EN 55022 Class B (CISPR 22A)	Compatible with standards
Laser Eye Safety	FDA 21CFR 1040.10, 1040.11 IEC/EN 60825-1, 2	Class 1 laser product
Component Recognition	IEC/EN 60950, UL	Compatible with standards
ROHS	2011/65/EU and (EU)2015/863	Compatible with standards
EMC	EN61000-3	Compatible with standards