Ascent Communication Technology

10G SFP+ DWDM 40 km

ASCENT DWDM ITU Channel SFP+ transceivers are designed for use in 10-Gigabit Ethernet links with distances up to 40 km over single-mode fiber. These transceivers include a PIN photo detector diode and temperature stabilized DFB-EML transmitter. Digital diagnostic functions are available via an I2C interface. This module is designed for single-mode fiber and operates at a nominal wavelength of 100 GHz ITU Grid, C Band DWDM wavelength.

• Up to 11.3 Gbps data rate

• Up to 40 km transmission distance on SMF

• DWDM EML laser and PIN receiver

• Metal enclosure, for lower EMI

• 2-wire interface with integrated Digital Diagnostic monitoring

• Hot-pluggable SFP+ footprint

• Compliant with SFF 8431 and SFF 8472

• Compliant with SFP+ MSA with LC connector

• Single 3.3 V power supply

• Case operating temperature range: -40 °C to +85 °C (industrial) 0 °C to +70°C (commercial)

• Power dissipation < 1.6 W

Absolute Maximum Ratings

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

Recommended Operating Conditions

Parameter	Symbol	Min.	Typ.	Max.	Unit	Notes
Case Operating Temperature	T_case	0		70	°C	SFPP‑AT‑LP‑DXX‑40
		‑40		85	°C	SFPP‑AT‑LP‑DXX‑40A
Power Supply Voltage	V_CC	3.14	3.3	3.47	V
Data Rate	BR		10.3125		Gbps
Transmission Distance	TD			40	km
Coupled Fiber	Single‑mode fiber					9/125 µm SMF

Optical Characteristics

Parameter	Symbol	Min.	Typ.	Max.	Unit	Notes
Transmitter
Average Optical Power	Pout	‑1		+3	dBm	1
Optical Extinction Ratio	ER	8.2			dB
Center Wavelength	λc	λc ‑ 0.1		λc + 0.1	nm	2
Center Wavelength Spacing			100		GHz	2
Spectrum Bandwidth (‑20 dB)	σ			1.0	nm
Side Mode Suppression Ratio	SMSR	30			dB
Average Launch Power (Laser Off)	Poff			‑30	dBm
Transmitter and Dispersion Penalty	TDP			2.0	dB
Output Eye Mask	Compliant with IEE 802.3ae
Receiver
Input Optical Wavelength	λc	1270		1610	nm
Receiver Sensitivity	P_sen			‑16.0	dBm	3
Input Saturation Power (Overload)	P_sat	0			dBm
LOS Assert	LOSA	‑28			dBm
LOS De‑assert	LOSD			‑19	dBm
LOS Detect Hysteresis	P_hys	0.5			dB

Notes:

1. Launched power (avg.) is power coupled into a single‑mode fiber with master connector. (Before of Life)

2. λC refer to wavelength selection, and corresponds to approximately 0.8 nm.

3. Measured with conformance test signal for BER = 10–12.@10.3125 Gbps, PRBS=2^31‑1, NRZ, optical source with worst ER, wavelength between 1528.77 nm and 1563.86 nm; back to back.

Electrical Characteristics

Parameter	Symbol	Min	Typ.	Max	Unit	Notes
Supply Voltage	V_CC	3.14	3.3	3.46	V
Supply Current¹	I_CC			400	mA	SFPP‑AT‑LP‑DXX‑40
				460	mA	SFPP‑AT‑LP‑DXX‑40A
Transmitter
Input Differential Impedance	R_IN		100		Ω	2
Single‑ended Data Input Swing	V_IN‑pp	180		700	mV
Transmit Disable Voltage	V_DIS	2.0		Vcc	V	3
Transmit Enable Voltage	V_EN	Vee		Vee+ 0.8	V
Transmit Disable Assert Time				10	µs
Receiver
Differential Data Output Swing	V_OUT‑pp	400		800	mV	4
Data Output Rise Time	tr	28			ps	5
Data Output Fall Time	tf	28			ps	5
LOS Output High Level	V_LOS‑H	2.0		V_CCHOST	V	6
LOS Output Low Level	V_LOS‑L	Vee		Vee+0.8	V	6
Power Supply Rejection	PSR	100			mV_PP	7

Notes:

1. Measured with receive Pin = Psen, Vcc = 3.3V, operation temperature range, without air flow

2. Connected directly to TX data input pins. AC coupled.

3. Or open circuit.

4. Into 100 ohms differential termination.

5. 20 – 80 %.

6. Loss of Signal is LVTTL. Logic 0 indicates normal operation; logic 1 indicates no signal detected.

7. Receiver sensitivity is compliant with power supply sinusoidal modulation of 20 Hz to 1.5 MHz up to specified value applied through the recommended power supply filtering network.