Ascent Communication Technology

2.5G SFP BiDi 10 km

ASCENT 2.5G 10 km BiDi Small Form Factor Pluggable (SFP) transceiver modules are compatible with the Small Form Factor Pluggable Multi-Sourcing Agreement (MSA).

• Operating data rate up to 2.5 Gbps

• 1310 nm and 1550 nm operating wavelength

• PIN-TIA receiver

• 20 km with 9/125 µm SMF

• Single 3.3V power supply

• Hot-pluggable SFP footprint

• LC connector interface

• Power dissipation < 1.0 W

• Operating temperature: 0 °C to +70 °C

• Compliant with SFF-8472

• Compliant with MSA SFP specification

• Class 1 FDA and IEC60825-1 laser safety compliant

Absolute Maximum Ratings

Parameter	Symbol	Min.	Max.	Unit
Storage Temperature	Ts	‑40	+85	°C
Maximum Supply Voltage	Vcc	‑0.5	3.6	V
Operating Relative Humidity	RH	5	85	%

Note: Exceeding any one of these values may destroy the device immediately.

Recommended Operating Conditions

Parameter		Symbol	Min.	Typ.	Max.	Unit
Operating Case Temperature		Tc	0		70	°C
Power Supply Voltage		Vcc	3.15	3.3	3.47	V
Power Supply Current		Icc			300	mA
Data Rate	FC			1.063		Gbps
	2XFC			2.125
	OC‑48/STM‑16			2.5

Optical Characteristics

Parameter		Symbol	Min.	Typ.	Max.	Unit
9 µm Core Diameter MMF		L		20		km
Data Rate				2.488		Gbps
Transmitter
Center Wavelength	SFP‑2G‑3155‑10	λ_C	1290	1310	1330	nm
Center Wavelength	SFP‑2G‑5531‑10	λ_C	1530	1550	1570	nm
Spectral Width (‑20 dB)		∆λ			1	nm
Side Mode Suppression Ratio		SMSR	30			dB
Average Output Power¹		Pout	‑5		0	dBm
Extinction Ratio		ER	8.2			dB
Rise/Fall Time (20 % to 80 %)		tr/tf			0.16	ns
Output Optical Eye²		Compliant with IEEE 802.3
Pout@TX Disable Asserted		Pout			‑45	dBm
Receiver
Center Wavelength	SFP‑2G‑3155‑10	λ_C	1530	1550	1570	nm
Center Wavelength	SFP‑2G‑5531‑10	λ_C	1290	1310	1330	nm
Receiver Sensitivity*(Note3)		Pmin			‑18	dBm
Receiver Overload		Pmax	‑3			dBm
LOS De‑Assert		LOSD			‑19	dBm
LOS Assert		LOSA	‑30			dBm
LOS Hysteresis			0.5			dB

Notes:

1. Output is coupled into a 9/125 µm SMF.

2. Filtered, measured with a PRBS 2²³‑ 1 test pattern @ 2.5 Gbps.

3. Minimum average optical power, measured at BER less than 1E‑12, with 2²³‑1 PRBS and ER = 8.2 dB.

Electrical Characteristics

Parameter		Symbol	Min.	Typ.	Max.	Unit	Notes
Transmitter
LVPECL Inputs (Differential)		Vin	400		2000	mVpp	AC Coupled Inputs¹
Input Impedance (Differential)		Zin	85	100	115	Ω	Rin > 100 kΩ @ DC
TX_Dis	Disable		2		Vcc+0.3	V
TX_Dis	Enable		0		0.8	V
TX_FAULT	Fault		2		Vcc+0.3	V
TX_FAULT	Normal		0		0.8	V
Receiver
LVPECL Outputs (Differential)		Vout	400		2000	mVpp	AC Coupled Outputs¹
Output Impedance (Differential)		Zout	85	100	115	Ω
TX_Disable Assert Time		t_off			10	µs
RX_LOS	LOS		2		Vcc+0.3	V
RX_LOS	Normal		0		0.8	V
MOD_DEF (0.2)		VoH	2.5		Vcc+0.3	V	With Serial ID
MOD_DEF (0.2)		VoL	0		0.5	V	With Serial ID

Notes:

1. LVPECL logic, internally AC coupled.

Digital Diagnostic Functions

Parameter	Range	Unit	Accuracy	Calibration
Temperature	0 to 70	°C	±3 °C	Internal / External
Voltage	3.0 to 3.6	V	±3 %	Internal / External
Bias Current	10 to 80	mA	±10 %	Internal / External
TX Power	‑5 to 0	dBm	±3 dB	Internal / External
RX Power	‑18 to ‑3	dBm	±3 dB	Internal / External

Note: The transceivers provide serial ID memory contents and diagnostic information about the present operating conditions by the 2‑wire serial interface (SCL, SDA). The diagnostic information with internal calibration or external calibration all are implemented, including received power monitoring, transmitted power monitoring, bias current monitoring, supply voltage monitoring and temperature monitoring.