Ascent Communication Technology

10G XFP ER 1550 nm 40 km

ASCENT’s XFP-AT-LP-51-40 Small Form Factor 10G (XFP) transceivers are designed for use in 10-Gigabit Ethernet links up to 40km over single mode fiber. It is widely used in applications such as Internet Service Provider (ISP) Fiber To The Home aggregation and backbone, Various Data Communication 10G Ethernet & SONET OC-192 IR-2/SONET OC-192 IR3/SDHSTM S-64.2b/SDH STM S-64.3b Links, Data Center networking for Ethernet and Fiber Channel SAN Networking and other optical links. The module consists of 1550 EML Laser, InGaAs PIN and Preamplifier in a high-integrated optical subassembly.It is compliant with the current XFP MultiSourceAgreement (MSA) Specification. They comply with 10-Gigabit Ethernet 10GBASE-ER/EW per IEEE 802.3ae and 10G Fiber Channel 40KM. Digital diagnostics functions are available via a 2-wire serial interface, as specified in the XFP MSA. It also defines a sophisticated system of alarm and warning flags, which alerts end-users when particular operating parameters are outside of a factory set normal range. The transceivers are RoHS compliant and lead free per Directive 2002/95/EC3.

• Hot-pluggable XFP footprint

• Supports 9.95 Gb/s to 11. 3Gb/s bit rates

• Supports Lineside and XFI loopback

• RoHS-6 Compliant (lead-free)

• Power dissipation<2.5 W

• 3.3 V & 1.8 V power supply

• Max. link length of 40 km

• Cooled 1550 nm EML and APD receiver

• Full duplex LC connector

• No reference clock required

• Built-in digital diagnostic functions

• Standard bail release mechanism

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

Absolute Maximum Ratings

Parameter	Symbol	Min.	Typ.	Max.	Unit	Note
Maximum Supply Voltage 2	Vcc2	‑0.3		3.6	V
Maximum Supply Voltage 3	Vcc3	‑0.3		2.0	V
Storage Temperature	TS	‑40		85	°C
Case Operating Temperature	Tcase	0		70	°C	Commercial
		‑40		85	°C	Industrial
Operating Relative Humidity	RH_op	5		95	%

Electrical Characteristics

Parameter	Symbol	Min.	Typ.	Max.	Unit	Note
Supply Voltage – 1.8V supply	Vcc2	3.3		1.89	V
Supply Voltage – 3.3V supply	Vcc3	3.1		3.5	V
Supply Current – 1.8V supply	Icc2			180	mA
Supply Current – 3.3V supply	Icc3			640	mA
Module Total Power	P			2.5	W	1
Transmitter
Input Differential Impedance	R_in		100		Ω	2
Differential Data Input Swing	V_in,pp	120		820	mV
Transmit Disable Voltage	V_D	2.0		Vcc	V	3
Transmit Enable Voltage	V_EN	GND		GND+ 0.8	V
Transmit Disable Assert Time				10	µs
Receiver
Differential Data Output Swing	V_out,pp	340		850	mV	4
LOS Fault	V_LOS fault	Vcc ‑ 0.5		Vcc_HOST	V	5
LOS Normal	V_LOS norm	GND		GND+0.5	V	5

Notes:

1. Maximum total power value is specified across the full temperature and voltage range.

2. After internal AC coupling.

3. Or open circuit.

4. Into 100 Ω differential termination.

5. Loss Of Signal is an open collector to be pulled up with a 4.7 kΩ to 10 kΩ resistor to 3.15 V to 3.6V. Logic 0 indicates normal operation; logic 1 indicates no signal detected.

Optical Characteristics

Parameter	Symbol	Min	Typ	Max	Unit	Note
Transmitter
Output Optical Power	Pout	‑1		4	dBm
Optical Wavelength	λ	1530		1570	nm
Side mode Suppression Ratio	SMSR	30			dB
Optical Extinction Ratio	ER	8.2			dB
Avg. Launch Power of OFF Transmitter	POFF			‑30	dBm
Eye Mask Margin		30			%
Receiver
Receiver Sensitivity	R_SEN			‑16.5	dBm	1
Input Saturation Power (Overload)	P_sat	+0.5			dBm
Wavelength Range	λ_C	1270		1610	nm
Receiver Reflectance	R_rx			‑27	dB
LOS De‑Assert	LOSD			‑18	dBm
LOS Assert	LOSA	‑32			dBm
LOS Hysteresis		0.5			dB

Notes:

1. Measured with BER < 10^‑12@ 10.3 Gbps, 2³¹‑ 1 PRBS.

Regulatory Compliance

Feature	Reference	Performance
Electrostatic Discharge (ESD)	IEC/EN 61000‑4‑2	Compatible with standards
Electromagnetic Interference (EMI)	FCC Part 15 Class B EN 55022 Class B (CISPR 22A)	Compatible with standards
Laser Eye Safety	FDA 21CFR 1040.10, 1040.11 IEC/EN 60825‑1, 2	Class 1 laser product
Component Recognition	IEC/EN 60950, UL	Compatible with standards
ROHS	2002/95/EC	Compatible with standards
EMC	EN61000‑3	Compatible with standards