Ascent Communication Technology

25G SFP28 850 nm 100m

Ascent’s SFP28 25Gb/s transceiver is an integrated ﬁber optic transceiver that provides a high-speed serial link at signaling rates up to 25.78 Gb/s. It is a single- channel, pluggable, fiber-optic module for short-range data communication and interconnect Ethernet applications. This module is designed to operate over multimode fiber systems using a nominal wavelength of 850nm. It has a transmission distance of up to 70 m on OM3 and 100 m on OM4 multi-mode fibers. The optical interface uses duplex LC receptacle. This module incorporates Gigalight Technologies proven circuit and VCSEL technology to provide reliable long life, high performance, and consistent service. The SFP28-25LP-85-01 module complies with SFF-8431 and SFF 8472 standards. It features a metal enclosure for lower EMI and 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 hot-pluggable.

· 25Gbps serial optical interface

· 850nm VCSEL transmitter and GaAs PIN PD receiver

· Rate Adaptation

· Operating Temperature Range:

Commercial：0°C to +70°C

Industrial：-40°C to +85°C

· Maximum link length of 70m via OM3 multimode Fiber (MMF)

· Maximum link length of 100m via OM4 multimode Fiber (MMF)

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		25.78125		Gbps

Note1, 2: See order information

Optical Characteristics

Parameter Transmitter	Symbol	Min.	Typ.	Max.	Unit	Notes
Center Wavelength	λ	840		860	nm
RMS Spectral Width	Pm			0.6	nm
Average Optical Power	Pavg	-5		2.4	dBm
Optical Modulation Amplitude	OMA	-5		3	dBm
Average Launch Power of OFF Transmitter	Poff			0.6	nm
Extinction Ratio	ER	3			dB
Optical Return Loss Tolerance				12	dB
Receiver
Center Wavelength	λ	840	850	860	nm
Damage Threshold		3.4			dBm
Receive Power Overload		2.4			dBm
Receiver Reflectance				-12	dBm
Receiver Sensitivity	SENS			-5	dBm	1
Receiver Sensitivity	SENS			-10	dBm	2
LOS Assert	LOS_A	-30			dBm
LOS De-assert	LOS_D			-13	dBm
LOS Hysteresis	LOSH	0.5			dB

Note:

1. Measured with a 25.78125G, PRBS-31 NRZ, ER>3.5dB, BER<1E-12.

2. Measured with a 25.78125G, PRBS-31 NRZ, ER>3.5dB, BER<5E-5.

Electrical Characteristics

Parameter	Symbol	Min.	Typ.	Max.	Unit	Notes
Power Consumption				1	W
Supply Current	Icc		100	300	mA

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