Ascent Communication Technology

100M SFP BX 4931 20 km

Ascent’s SFPP-AF-LP-XXXX-20-AN transceivers are designed expressly for high-speed communication applications that require rates up to 155 Mb/s. They are designed to be compliant with the SFF-8472 SFP MSA. The module is suitable for data links up to 20 km in distance over a 9/125 µm single mode fiber.

• Up to 155 Mbps Data Links

• Up to 20 km transmission on SMF

• 1310 nm FP laser and PIN receiver for SFP-AF-LP-5531-20-AN

• 1550 nm FP laser and PIN receiver for SFP-AF-LP-3155-20-AN

• Compliant with SFP+ MSA with LC connector

• Compliant with SFF 8472

• +3.3 V single power supply

Absolute Maximum Ratings

Parameter	Symbol	Min	Max	Unit
Supply Voltage	Vcc	‑0.5	4.5	V
Storage Temperature	Ts	‑40	+85	°C
Operating Humidity	‑	5	85	%

Recommended Operating Conditions

Parameter		Symbol	Min	Typical	Max	Unit
Operating Case Temperature	Standard	Tc	0		+70	°C
Operating Case Temperature	Industrial	Tc	‑40		+85	°C
Power Supply Voltage		Vcc	3.13	3.3	3.47	V
Power Supply Current		Icc			300	mA
Data Rate				155		Mbps

Optical and Electrical Characteristics (SFP‑AF‑LP‑5531‑20‑AN)

Parameter		Symbol	Min	Typical	Max	Unit	Notes
Transmitter
Centre Wavelength		λc	1500	1550	1600	nm
Spectral Width (‑20dB)		∆λ			4	nm
Average Output Power		Pout	‑14		‑8	dBm	1
Extinction Ratio		ER	9			dB
Data Input Swing Differential		VIN	400		1800	mV	2
Input Differential Impedance		ZIN	90	100	110	Ω
TX Disable	Disable		2.0		Vcc	V
TX Disable	Enable		0		0.8	V
TX Fault	Fault		2.0		Vcc	V
TX Fault	Normal		0		0.8	V
Receiver
Centre Wavelength		λc	1260		1360	nm
Receiver Sensitivity					‑32	dBm	3
Receiver Overload			‑3			dBm	3
LOS De‑Assert		LOSD			‑32	dBm
LOS Assert		LOSA	‑45			dBm
LOS Hysteresis			1		4	dB
Data Output Swing Differential		Vout	400		1800	mV	4
LOS		High	2.0		Vcc	V
LOS		Low			0.8	V

Notes:

1. The optical power is launched into SMF.

2. PECL input, internally AC‑coupled and terminated.

3. Measured with a PRBS 223‑1 test pattern @155Mbps, BER ≤1×10‑10.

4. Internally AC‑coupled.

Optical and Electrical Characteristics (SFP‑AF‑LP‑3155‑20‑AN)

Parameter		Symbol		Min	Typical	Max	Unit	Notes
Transmitter
Centre Wavelength			λc	1260	1310	1360	nm
Spectral Width (RMS)			∆λ			4	nm
Average Output Power			Pout	‑15		‑7	dBm	1
Extinction Ratio			ER	9			dB
Data Input Swing Differential			VIN	400		1800	mV	2
Input Differential Impedance			ZIN	90	100	110	Ω
TX Disable	Disable			2.0		Vcc	V
TX Disable	Enable			0		0.8	V
TX Fault	Fault			2.0		Vcc	V
TX Fault	Normal			0		0.8	V
Receiver
Centre Wavelength			λc	1480		1580	nm
Receiver Sensitivity						‑28	dBm	3
Receiver Overload				‑3			dBm	3
LOS De‑Assert			LOSD			‑29	dBm
LOS Assert			LOSA	‑45			dBm
LOS Hysteresis				0.5	2	6	dB
Data Output Swing Differential			Vout	400		1800	mV	4
LOS			High	2.0		Vcc	V
LOS			Low			0.8	V

Notes:

1. The optical power is launched into SMF.

2. PECL input, internally AC‑coupled and terminated.

3. Measured with a PRBS 223‑1 test pattern @155Mbps, BER ≤1×10‑10.

4. Internally AC‑coupled.

Timing and Electrical

Parameter	Symbol	Min	Typical	Max	Unit
Tx Disable Negate Time	t_on			1	ms
Tx Disable Assert Time	t_off			10	µs
Time To Initialize, including Reset of Tx Fault	t_init			300	ms
Tx Fault Assert Time	t_fault			100	µs
Tx Disable To Reset	t_reset	10			µs
LOS Assert Time	t_loss_on			100	µs
LOS De‑assert Time	t_loss_off			100	µs
Serial ID Clock Rate	f_serial_clock			400	KHz
MOD_DEF (0: 2)‑High	VH	2		Vcc	V
MOD_DEF (0: 2)‑Low	VL			0.8	V

Diagnostics

Parameter	Range	Unit	Accuracy	Calibration
Temperature	0 to +70 (standard)	°C	±3°C	Internal / External
Temperature	‑40 to +85 (industrial)	°C	±3°C	Internal / External
Voltage	3.0 to 3.6	V	±3%	Internal / External
Bias Current	0 to 100	mA	±10%	Internal / External
TX Power	‑14 to ‑8	dBm	±3dB	Internal / External
RX Power	‑30 to ‑8	dBm	±3dB	Internal / External