ASFP28-25G-3327B-LR -

Features

Compliant to 3cc 25GBASE-LR
Up to 78 Gb/s data links
DFB transmitter, PIN photo-detector
Single LC Connector for bi-directional application
Electrical interface compliant to SFF-8431 MSA
2-wire interface for management specifications compliant with SFF-8472 digital diagnostic monitoring interface for optical transceivers
Operating case temperature: -40 to 85°C
All-metal housing for superior EMI performance
Maximum power consumption 5W
Advanced firmware allow customer system encryption information to be stored in transceiver
RoHS compliant

Parameter	Symbol	Accuracy	Unit	Notes
Temperature monitor absolute error	DMI_Temp	± 3	oC	Over operating Temp
Laser power monitor absolute error	DMI_TX	± 2 dB	dB	1
RX power monitor absolute error	DMI_RX	± 2 dB	dB	1
Supply voltage monitor absolute error	DMI_VCC	±0.1	V	Full operating range
Bias Current monitor	DMI_Ibias	± 10%	mA

Parameter	Symbol	Min.	Typ.	Max.	Units	Note
Power Consumption				1.5	W
Supply Current	Icc			450	mA
Overload Differential Voltage pk-pk	TP1a	900			mV
Common Mode Voltage (Vcm)	TP1	-350		2850	mV	1
Differential Termination Resistance Mismatch	TP1			10	%	At 1MHz
Differential Return Loss (SDD11)	TP1	See CEI-28G-VSR Equation 13-19			dB
Common Mode to Differential conversion and Differential to Common Mode conversion (SDC11, SCD11)	TP1	See CEI-28G-VSR Equation 13-19			dB
Stressed Input Test	TP1a	See CEI-28G-VSR Section 13.3.11.2.1
Center Wavelength	λt	Ref order information			nm
Center Wavelength Stability	ΔλD	-6.5		6.5	nm
Side Mode Suppression Ratio	SMSR	30			dB
Average Optical Power	Pavg	-7		2	dBm	2
Laser Off Power	Poff			-20	dBm
Optical Modulation Amplitude	OMA	-4		2	dBm	3
Launch power in OMA minus TDP	OMA-TDP	-5			dBm
Transmitter and dispersion penalty (TDP),	TDP				dB
Extinction Ratio	ER	3			dB
Optical Return Loss Tolerance	OTL			20	dB
Transmitter Reflectance	TR			-26	dB
Relative Intensity Noise	RIN20OMA			-130	dB/Hz
Eye Mask {X1, X2, X3, Y1, Y2, Y3}		{0.31, 0.4, 0.45, 0.34, 0.38, 0.4}		3

Parameter	Symbol	Min.	Typ.	Max.	Units	Note
Differential Voltage, pk-pk	TP4			900	mV
Common Mode Voltage (Vcm)	TP4	-350		2850	mV	1
Common Mode Noise, RMS	TP4			17.5	mV
Differential Termination Resistance Mismatch	TP4			10	%	At 1MHz
Differential Return Loss (SDD22)	TP4	See CEI-28G-VSR Equation 13-19			dB
Common Mode to Differential conversion and Differential to Common Mode conversion (SDC22, SCD22)	TP4	See CEI-28G-VSR Equation 13-21			dB
Common Mode Return Loss (SCC22)	TP4			-2	dB	2
Transition Time, 20 to 80%	TP4	9.5			ps
Vertical Eye Closure (VEC)	TP4			5	dB
Eye Width at 10-15 probability (EW15)	TP4	0.57			UI
Eye Height at 10-15 probability (EH15)	TP4	228			mV
Center Wavelength	λr				nm
Damage Threshold	THd	3			dBm	3
Average Receive Power		-13.3		2	dBm	4
Receive Power (OMA)				-	dBm
UnStressed Receiver Sensitivity (OMA)	SEN			-11.3	dBm	5
Receiver Reflectance	RR			-26	dB
LOS Assert	LOSA	-30			dBm
LOS Deassert	LOSD			-13	dBm
LOS Hysteresis	LOSH	0.5			dB

PIN	Logic	Symbol	Name / Description	Note
1		VeeT	Module Transmitter Ground	1
2	LVTTL-O	TX_Fault	Module Transmitter Fault
3	LVTTL-I	TX_Dis	Transmitter Disable; Turns off transmitter laser output
4	LVTTL-I/O	SDA	2-Wire Serial Interface Data Line	2
5	LVTTL-I	SCL	2-Wire Serial Interface Clock	2
6		Mod_ABS	Module Absent, connected to VeeT or VeeR in the module
7	LVTTL-I	RS0	Receiver Rate Select (not used)
8	LVTTL-O	RX_LOS	Receiver Loss of Signal Indication Active LOW
9	LVTTL-I	RS1	Transmitter Rate Select (not used)
10		VeeR	Module Receiver Ground	1
11		VeeR	Module Receiver Ground	1
12	CML-O	RD-	Receiver Inverted Data Output
13	CML-O	RD+	Receiver Data Output
14		VeeR	Module Receiver Ground	1
15		VccR	Module Receiver 3.3 V Supply
16		VccT	Module Receiver 3.3 V Supply
17		VeeT	Module Transmitter Ground	1
18	CML-I	TD+	Transmitter Non-Inverted Data Input
19	CML-I	TD-	Transmitter Inverted Data Input
20		VeeT	Module Transmitter Ground	1