Ascent Communication Technology

10/25G SFP28 1310nm 10km

Ascent’s SFPP28 10/25G LR transceiver provides 10/25GBASE-LR throughput up to 10km over single mode fiber (SMF) using a wavelength of 1310nm via an LC duplex connector. It provides connectivity option for 25G Ethernet, 10G Ethernet and data center. It is fully compliant with the SFP28 MSA, SFF-8472, SFF-8402, SFF-8432 and applicable portions of SFF-8431 standard. An integrated ﬁber optic transceiver that provides a high-speed serial link at signaling rates up to 25.78 Gb/s. The module complies with SFF-8431 and SFF-8472 standards. It is suitable for 10/25G Ethernet and CPRI 10 applications and has a transmission distance of up to 10 km on single-mode fibers. The transceiver features a metal enclosure for lower EMI. It 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 also hot-pluggable.

· Support 10Gbps and 25Gbps data links

· Operating data rate up to 25.78Gbps

· SFP28 MSA package with duplex LC connector

· Rate Adaptation

· Up to 10km transmission distance

· High sensitivity Pin photodiode and TIA

· Hot pluggable 20pin connector

· Low power consumption

· Single +3.3V ±5% power supply

· Compliant with SFF-8472 & IEEE 802.3cc

· Fully RoHS Compliant

· Case operating temperature range:

Commercial：0°C to +70°C

Industrial: -40 °C to +85 °C

Absolute Maximum Ratings

Parameter	Symbol	Min.	Typ.	Max.	Unit
Storage Temperature	T_s	-40		85	°C
Relative Humidity	RH	0		85	%

Recommended Operating Conditions

Parameter	Symbol	Min.	Typ.	Max.	Unit	Notes
Case Temperature	T_c	0		70	°C	1
Case Temperature	T_c	-40		85	°C	2
Power Supply Voltage	V_CC	3.15	3.3	3.45	V
Bit Rate	BR		10.3125 & 25.78125		Gbps
Bit Error Ratio	BER			5*10^-5
Max Supported Link Length	L			10	km

Note1, 2: See order information

Optical Characteristics

Parameter Transmitter	Symbol	Min.	Typ.	Max.	Unit	Notes
Center Wavelength	λ	1290		1330	nm
Side-mode Suppression Ratio	SMSR	30			nm
Average Optical Power	Pavg	-7		2.0	dBm
Optical Modulation Amplitude	TxOMA	-4			dBm
Transmitter and Dispersion Penalty	TDP			2.7	dB
Average Launch Power of OFF Transmitter	Poff			-30	dBm
Extinction Ratio	ER	3.5			dB
Optical Return Loss Tolerance				11	dB
Transmitter Reflectance				-12	dB
Receiver
Center Wavelength	λ	1260		1360	nm
Damage Threshold		3			dBm
Receive Power Overload				2	dBm
Receiver Reflectance				-26	dB
Receiver Sensitivity	S			-12	dBm	1
LOS Assert	LOS_A	-30			dBm
LOS De-assert	LOS_D			-17	dBm
LOS Hysteresis		0.5			dB

Note:

1. Measured at 25.78Gb/s, ER>3.5dBm, PRBS 2³¹ -1 and BER better than or equal to 5E-5.

Electrical Characteristics

Parameter	Symbol	Min.	Typ.	Max.	Unit	Notes
Power Consumption				1.2	W
Supply Current	Icc			350	mA

Electric Ports Definition

Parameter	Symbol	Min.	Typ.	Max.	Unit	Notes
Transmitter
Input Differential Impedance	R_IN		100		Ω
Single-ended Data Input Swing	V_IN	90		450	mVp-p
Transmit Disable Voltage	V_DIS	2			V_CCHOST
Transmit Enable Voltage	V_EN	V_EE			V_EE+0.8
Transmit Fault Assert Voltage	V_FA	2			V_CCHOST
Transmit Fault De-Assert Voltage	V_FDA	V_EE			V_EE+0.4
Receiver
Single-ended Data Output Swing	V_OD	200		450	mVp-p
LOS Fault	V_LOSFT	2		V_CCHOST	V
LOS Normal	V_LOSNR	V_EE		V_EE+0.4	V

Digital Diagnostics

Parameter	Accuracy	Unit
Internally Measured Transceiver Temperature	+/-3	°C
Internally Measured Transceiver Supply Voltage	+/-3	%
Measured Tx bias Current	+/-10	%
Measured Tx Output Power	+/-3	dB
Measured Rx Received Average Optical Power	+/-3	dB