Ascent Communication Technology

32G SFP28 1310 nm 10 km

Ascent’s SFP28 32 Gb/s transceiver is an integrated ﬁber optic transceiver that provides a high-speed serial link at signaling rates up to 28.05 Gb/s. It is a single-channel, pluggable, fiber-optic module for short and medium-range data communication and interconnect Ethernet applications. This module is designed to operate over single- mode fiber systems using a nominal wavelength of 1310 nm. It has a transmission distance of up to 10 km over SMF. The optical interface uses duplex LC receptacle. The SFP28-32LP-31-10 module complies with SFF-8431 and SFF 8472 standards. It features a metal enclosure for lower EMI and utilizes a 2- wire interface that is compliant with the serial communication protocol as defined in the SFP+ MSA. It also provides a unique integrated digital diagnostic monitoring interface, allowing for real-time access to device operating parameters. This module is hot-pluggable.

· Up to 28.05 Gb/s bit rates

· Up to 10 km transmission on SMF

· DFB Laser and PIN receiver

· Metal enclosure, for lower EMI

· 2-wire interface with integrated Digital Diagnostic monitoring

· Compliant with SFP+ MSA with LC connector

· Single 3.3V power supply

· Power consumption < 1.5 W

· Case operating temperature range: commercial: 0°C to +70°C, extended: 0°C to +85°C

· Compliant to SFF-8431

· Compliant to SFF 8472

· RoHS Compliant

Absolute Maximum Ratings

Parameter Storage Temperature	Symbol Ts	Min. -40	Typ. -	Max. 85	Unit Note °C
Relative Humidity	RH	5	-	95	%
Power Supply Voltage	V_CC	-0.5	-	4.0	V
Signal Input Voltage		Vcc-0.3	-	Vcc+0.3	V

Recommended Operating Conditions

Parameter Case Operating Temperature	Symbol Tcase	Min. 0	Typ. -	Max. 70	Unit °C	Note Commercial
		0	-	85	°C	Extended
Power Supply Voltage	V_CC	3.14	3.30	3.47	V
Power Supply Current	I_CC	-		450	mA
			8.5		Gbps	1
Data Rate	BR		14.025
			28.05
Bit Error Rate	BER			10^-12	Gbps	2
				10-6		3
Transmission Distance
Coupled Fiber	Single-mode fiber

Notes:

1. 8x, Fibre Channel compatible, per FC-PI-41.

2. PRBS 27-1 for 8GFC. PRBS 231-1 for 16GFC.

3. FEC for 32GFC.

Optical Characteristics

Parameter Transmitter	Symbol	Min.	Typ.	Max.	Unit	Note
Average Output Power, 28.05 Gb/s & 14.025 Gb/s	POUT	-5		+2.0	dBm	1, 2
Average Output Power, 8.5 Gb/s	POUT	-8.4		+0.5	dBm	1
Optical Wavelength	λ	1295		1325	nm
Spectral Width (RMS)	σ			1	nm
Optical Modulation Amplitude
8.5 Gb/s	OMA	-5.4		+3	dBm
14.025 Gb/s		-2.0
28.05 Gb/s		-2.0
Transmitter Dispersion Penalty
8.5 Gb/s	TDP			3.2	dB

14.025 Gb/s			4.4
28.05 Gb/s			2.7
Optical Extinction Ratio
8.5 Gb/s & 14.025 Gb/s	ER	3.5		dB
28.05 Gb/s		4.0
Relative Intensity Noise
8.5Gb/s	RIN		-128	dB/Hz
14.025Gb/s			-130
28.05Gb/s			-130
Receiver
Unstressed Receiver OMA Sensitivity
8.5 Gb/s	RSENS		-13.8	dBm	3
14.025 Gb/s			-12.0
28.05 Gb/s			-11.4
Average Receiver Power	RxMAX		2	dBm
Optical Return Loss
8.5 Gb/s & 14.025 Gb/s		12		dB
28.05 Gb/s		26
LOS De -Assert	LOSD		-17	dBm
LOS Assert	LOSA	-30		dBm
LOS Hysteresis		0.5		dB

Notes:

1. Class 1 Laser Safety limit per FDA/CDRH, and EN (IEC) 60825 laser safety standards.

2. 3200-SM-LC-L OMA in dBm shall also exceed -5.0 TDP.

3. For 32GFC with FEC, receiver sensitivity is defined at 10-6 BER level, not 10-12 BER level.

Electrical Characteristics

Parameter	Symbol	Min.	Typ.	Max.	Unit	Note
Supply Voltage	Vcc	3.14	3.3	3.46	V
Supply Current	Icc			450	mA	1
Transmitter
Input Differential Impedance	Rin		100		Ω	2
Differential Data Input Eye Height	Vin, pp	250		900	mV	2
Transmit Disable Voltage	VD	Vcc–1.3		Vcc	V	3
Transmit Enable Voltage	VEN	Vee		Vee+ 0.8	V
Receiver
Differential Data Output Swing	Vout, pp	300		1000	mV	4
LOS Fault	VLOS fault	Vcc–1.3		VccHOST	V	5
LOS Normal	VLOS norm	Vee		Vee+0.8	V	5

Notes:

1. With established link, the total power dissipation shall not exceed 1.3 W/

2. Connected directly to TX data input pins. AC coupling from pins into CDR, BER contour 10-6

3. Or open circuit.

4. Into 100 Ω differential termination.
5. LOS is an open collector output. Should be pulled up with 4.7 kΩ to 10 kΩ on the host board. Normal operation is logic 0; loss of signal is logic 1. Maximum pull-up voltage is 5.5 V.