10/25GBASE-SR SFP28 Dual-rate 850nm 100m DOM Duplex LC/UPC MMF Optical Transceiver Module

Applications:

25GBASE-SR Ethernet

Ordering information

Part No.	Data Rate	Laser	Fiber Type	Distance*Note1	Optical Interface	Temp. *Note2	DDMI

LRTP8525-X1ATL(25/10G)	25Gbps	850nm-VCSEL	MMF	100M	LC	ST	Y

Note1: 100m with 50/125µm OM4 MMF

Note2: ST: -5 ~ +70 deg C

Regulatory Compliance

Feature	Standard	Performance
Electrostatic Discharge (ESD) to the Electrical Pins	MIL-STD-883G	HBM class 1, 1000volts and above,
	Method 3015.7	Contact discharge on Golden Finger.
Electrostatic Discharge to the enclosure	IEC-61000-4-2	Compliant with standards.
	GR-1089-CORE
Electromagnetic Interference (EMI)	FCC Part 15 Class B EN55022:2006	Compliant with standards Noise frequency range: 30MHz to 18 GHz.System margins depend on customer host board and chassis design.
	VCCI Class B
Immunity	IEC 61000-4-3	Compliant with standards.
Laser Eye Safety	FDA 21CFR 1040.10 and 1040.11 EN (IEC) 60825-1:2007	CDRH compliant and Class I laser product.
	EN (IEC) 60825-2:2004+A1
Component Recognition	UL and CUL	Compliant with standards.
	EN60950-1:2006
RoHS6	2002/95/EC 4.1&4.2 2005/747/EC 5&7&13	Compliant with standards*note3
Note3: In light of item 5 in RoHS exemption list of RoHS Directive 2002/95/EC, Item 5: Lead in glass of cathode ray tubes, electronic components and fluorescent tubes.
In light of item 13 in RoHS exemption list of RoHS Directive 2005/747/EC, Item 13: Lead and cadmium in optical and filter glass. The three exemptions are being concerned for Trixon transceivers, because Trixon transceivers use glass, which may contain Pb, for components such as lenses, windows, isolators, and other electronic components.
Absolute Maximum Ratings*Note4

Parameter	Symbol	Min	Max	Unit
Storage Temperature	Tst	-20	85	degC
Relative Humidity (non-condensation)	RH	-	85	%
Supply Voltage	VCC	-0.5	3.6	V
Voltage on LVTTL Input	Vilvttl	-0.5	VCC+0.5	V
LVTTL Output Current	Lolvttl	-	15	mA
Voltage on Open Collector Output	Voco	0	6	V

Note4: Exceeding any one of these values may destroy the device permanently.

Product Description

The LRTP8525-X1ATL(25/10G) is an 850 nm VCSEL 25Gigabit SFP28 transceiver. It is designed to transmit and receive optical data over 50/125μm multimode optical fiber ( MMF) and support up to 70m on OM3 MMF and 100m on OM4 MMF. The module has a duplex LC optical interface and all mechanical

characteristics are compliant with the current SFP+ specification (SFF-8431 and SFF-8432).

Recommended Operating Conditions

Parameter	Symbol	Min	Typical	Max	Unit
Operating Case Temperature	Topc	0	-	70	℃
Power Supply Voltage	VCC	3.1	-	3.5	V
Operating Relative Humidity	OH	5	-	85	%
Supply Current	Is	-	-	330	mA
Fiber Length: 2000 MHz∙km 50μm MMF (OM3)		0.5		70	m
Fiber Length: 2000 MHz∙km 50μm MMF (OM3)		0.5	-	70	m
Fiber Length: 4700 MHz∙km 50μm MMF (OM4)		0.5		100	m
Fiber Length: 4700 MHz∙km 50μm MMF (OM4)		0.5	-	100	m

Performance Specifications – Electrical

Parameter	Symbol	Min	Typ.	Max	Unit
Data Rate, each Lane			25.78		Gbps
Control I/O Voltage, High	VI H	2	-	VCC	V
Control I/O Voltage, Low	VIL	0	-	0.8	V
Tx Input Diff Voltage	VI	180	-	700	mV
Tx Input Diff Impedance	Z IN	90	100	110	Ω
Rx Output Diff Voltage	Vo	300		900	mV
Rx Output Diff Impedance	ZOUT	90	100	110	Ω

Performance Specifications – Optical

Parameter

Symbol

Min

Typ.

Max

Unit

Transmitter

Center Wavelength	λt	840	850	860	nm
RMS Spectral Width	δλt	-	-	0.6	nm
Average Optical Power, each Lane	Pavg	-8.4	-	+2.4	dBm
TDP		-	-	4.3	dB
Extinction Ratio	ER	2	-	-	dB
Average Launch Power OFF Transmitter, each Lane	Poff			-30	dBm
		-	-

Receiver

Center Wavelength	Λr	830	850	860	nm
Rx Sensitivity Note 5			-	-10.3	dBm
Receiver Reflectance		-	-	-12	dB
LOS De-Assert	LOSD			-13	dBm
LOS Assert	LOSA	-30			dBm
LOS Hysteresis	LOSH	0.5			dB

Note5: Measured with a test pattern, @25.78Gb/s, BER<5E-5. Informative Only

Pin Descriptions

Pin Function Definitions

PinNum.Name	Function	PlugSeq.	Notes
1 VeeT	Transmitter Ground	1	Note 10
2 TX Fault	Transmitter Fault Indication	3	Note 6
3 TX Disable	Transmitter Disable	3	Note 7, Module disables on high or open.
4 SDA	Module Definition 2	3	2-wire Serial Interface Data Line.
5 SCL	Module Definition 1	3	2-wire Serial Interface Clock.
6 MOD-ABS	Module Definition 0	3	Note 8
7 RS0	RX Rate Select (LVTTL).	3	Rate Select 0, optionally controls SFP+ module receiver. This pin is pulled low to VeeT with a >30K resistor..
8 LOS	Loss of Signal	3	Note9
9 RS1	TX Rate Select (LVTTL).	1	Rate Select 1, optionally controls SFP+
9 RS1	TX Rate Select (LVTTL).	1	module transmitter. This pin is pulled low to VeeT with a >30K resistor
10 VeeR	Receiver Ground	1	Note 10
11 VeeR	Receiver Ground	1	Note 10
12 RD-	Inv. Received Data Out	3	Note 11
13 RD+	Received Data Out	3	Note 11
14 VeeR	Receiver Ground	1	Note 10
15 VccR	Receiver Power	2	3.3V ± 5%, Note 12
16 VccT	Transmitter Power	2	3.3V ± 5%, Note 12
17 VeeT	Transmitter Ground	1	Note 10
18 TD+	Transmit Data In	3	Note 13
19 TD-	Inv. Transmit Data In	3	Note 13
20 VeeT	Transmitter Ground	1	Note 10

Note6: TX Fault is an open collector/drain output, which should be pulled up with a 4.7 K – 10K_ resistor on the host board. Pull up voltage between 2.0V and VccT/ R+0.3V. When high,output indicates a laser fault of some kind.Low indicates normal operation. In the low state, the output will be pulled to < 0.8V.

Note7: TX disable is an input that is used to shut down the transmitter optical output. It is pulled up within the module with a 4.7 K – 10 K_ resistor. Its states are: Low: Transmitter on; High: Transmitter Disabled; Open: Transmitter Disabled

Note8: Module Absent, connected to VeeT or VeeR in the module.

Note9: LOS (Loss of Signal) is an open collector/drain output, which should be pulled up with a 4.7 K –10K_ resistor. Pull up voltage

between 2.0V and VccT/ R+0.3V. When high, this output indicates the received optical power is below the worst-case receiver sensitivity (as defined by the standard in use). Low indicates normal operation. In the low state, the output will be pulled to < 0.8V.

Note10: The module signal ground contacts, VeeR and VeeT, should be isolated from the module case.

Note11: RD-/+: These are the differential receiver outputs. They are AC coupling that is done inside the module and is thus not required

on the host board.

Note12:VccR and VccT are the receiver and transmitter power supplies. They are defined as 3.3V ±5% at the SFP connector pin.

Inductors with DC resistance of less than 1 ohm should be used in order to maintain the required voltage at the SFP input pin

with 3.3V supply voltage. VccR and VccT may be internally connected within the SFP transceiver module.

Note13 TD-/+: These are the differential transmitter inputs. They are AC-coupled that is done inside the module and is thus not required

on the host board.

Eye Safety

These transceivers are Class 1 laser products. It complies with IEC-60825 and FDA 21 CFR 1040.10 and 1040.11. The transceiver

must be operated within the specified temperature and voltage limits. The optical ports of the module shall be terminated with an optical connector or with a dust plug.