Ascent Communication Technology

10G SFP+ CWDM 40 km

ASCENT’s CWDM SFP+ transceivers are designed for use in 10-Gigabit Ethernet links with distances up to 80 km over single-mode fiber. These transceivers include a a PIN photo detector diode and uncooled CWDM DFB laser transmitter (1260 nm to 1370 nm) or an APD receiver and CWDM EML transmitter (1470 nm to 1610 nm). Digital diagnostic functions are available via an I2C interface. This module is designed for single-mode fiber and operates at wavelengths between 1270 nm to 1610 nm.

• Up to 11.3 Gbps Data Links

• Up to 40 km transmission on SMF

• Uncooled CWDM DFB Laser and PIN receiver (1270 nm to 1370 nm)

• CWDM EML transmitter and PIN receiver (1470 nm to 1610 nm)

• Metal enclosure for lower EMI

• 2-wire interface with integrated Digital Diagnostic monitoring

• Hot-pluggable SFP+ footprint

• Specifications compliant with SFF 8472

• Compliant with SFP+ MSA with LC connector

• Single 3.3 V power supply

• Commercial/Industrial case operating temperature range: 0 °C to +70 °C / -40 °C to +85 °C

• Without CDR (standard) or with CDR supported 9.95 Gb/s to 11.3Gb/s reference-free

Absolute Maximum Ratings

Parameter	Symbol	Min.	Typ.	Max.	Unit	Note
Storage Temperature	Ts	‑40	‑	85	°C
Relative Humidity	RH	5	‑	95	%
Power Supply Voltage	VCC	‑0.3	‑	4	V
Signal Input Voltage		Vcc‑0.3	‑	Vcc+0.3	V

Recommended Operating Conditions

Parameter	Symbol	Min.	Typ.	Max.	Unit	Note
Case Operating Temperature	Tcase	0	‑	70	°C	Commercial
		‑40	‑	85	°C	Industrial
Power Supply Voltage	VCC	3.14	3.3	3.47	V
Power Supply Current	ICC	‑		450	mA
Data Rate	BR		10.3125	11.3	Gbps
Transmission Distance	TD		‑	40	km
Coupled fiber	Single‑mode fiber					9/125 µm SMF

Optical Characteristics

Parameter	Symbol	Min.	Typ.	Max.	Unit	Note
Transmitter
Average Launched Power (1270 nm to 1370 nm)	P_OUT	0		5	dBm	1
Average Launched Power (1470 nm to 1610 nm)	P_OUT	‑1		3	dBm	2
Extinction Ratio (1270 nm to 1370 nm)	ER	3.5			dB
Extinction Ratio (1470 nm to 1610 nm)	ER	8.2			dB
Center Wavelength	λc	λc‑6.5		λc+6.5	nm	3
Spectral Width (‑20dB)	σ			1.0	nm
SMSR		30			dB
Transmitter OFF Output Power (1470 nm to 1610 nm)	Poff			‑30	dBm
Transmitter and Dispersion Penalty (1470 nm to 1610 nm)	TDP			2.0	dB
Output Eye Mask		Compliant with IEEE 802.3ae
Receiver
Input Optical Wavelength	λ	1270		1610	nm
Receiver Sensitivity (1270 nm to 1370 nm)	Psen			‑15	dBm	4
Receiver Sensitivity (1470 nm to 1610 nm)				‑16		5
Input Saturation Power (Overload) (1270 nm to 1370 nm)	Psat	0.5			dBm
Input Saturation Power (Overload) (1470 nm to 1610 nm)	Psat	0			dBm
LOS Assert (1270 nm to 1370 nm)	LOSA	‑30			dBm
LOS Assert (1470 nm to 1610 nm)	LOSA	‑35			dBm
LOS De‑Assert (1270 nm to 1370 nm)	LOSD			‑17	dBm
LOS De‑Assert (1470 nm to 1610 nm)	LOSD			‑26	dBm
LOS Detect Hysteresis	PHys	0.5			dB

Notes:

1. 1. Class 1 Laser Safety per FDA/CDRH and IEC‑825‑1 regulations.

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

3. For λc refer to wavelength selection

4. Measured with a PRBS 2³¹‑1 test pattern, @ 10.325 Gb/s, BER<10^‑12.

5. Measured with conformance test signal for BER = 10^–¹² @ 10.3125 Gbps, PRBS = 2³¹‑1, NRZ, Optical source with worst ER, Wavelength between 1470 nm and 1610 nm; back to back.

Electrical Characteristics

Parameter	Symbol	Min	Typ.	Max	Unit	Note
Supply Voltage	Vcc	3.14	3.3	3.46	V
Supply Current (Note 1)	Icc			450	mA	1270 nm to 1370 nm
				400	mA	1470 nm to 1610 nm
				460	mA	1470 nm to 1610 nm (industrial)
				430	mA	1470 nm to 1610 nm with CDR
				490	mA	1470 nm to 1610 nm (industrial) with CDR
Transmitter
Input Differential Impedance	Rin		100		Ω	2
Differential Data Input Swing (1270 nm to 1370 nm)	Vin, pp	180		1200	mV
Differential Data Input Swing (1470 nm to 1610 nm)	Vin, pp	180		700	mV
Transmit Disable Voltage (1270 nm to 1370 nm)	V_Dis	Vcc‑1.3		Vcc	V
Transmit Disable Voltage (1470 nm to 1610 nm)	V_Dis	2.0		Vcc	V
Transmit Enable Voltage	V_EN	Vee		Vee+ 0.8	V	3
Transmit Disable Assert Time				10	µs
Receiver
Differential Data Output Swing (1270 nm to 1370 nm)	Vout, pp	300		850	mV	4
Differential Data Output Swing (1470 nm to 1610 nm)	Vout, pp	400		800	mV	4
Data Output Rise Time (1270 nm to 1370 nm)	tr	30			ps	5
Data Output Rise Time (1470 nm to 1610 nm)	tr	30			ps	5
Data Output Fall Time (1270 nm to 1370 nm)	tf	28			ps	5
Data Output Fall Time (1470 nm to 1610 nm)	tf	28			ps	5
LOS Fault (1270 nm to 1370 nm)	V_{LOS_fault}	Vcc‑1.3		V_CCHOST	V	6
LOS Output High Level (1470 nm to 1610 nm)	V_LOS‑H	2.0		V_CCHOST	V	6
LOS Normal (1270 nm to 1370 nm)	V_{LOS_norm}	Vee		Vee+0.8	V	6
LOS Output Low Level (1470 nm to 1610 nm)	V_LOS‑L	Vee		Vee+0.8	V	6