Ascent Communication Technology

40G QSFP+ LR4 10 km

Ascent QSFP+ LR4 is designed to operate over single-mode fiber system using 4X10 CWDM channel in 1310 band and links up to 10km. The module converts 4 inputs channel of 10Gb/s electrical data to 4 CWDM optical signals, and multiplexes them into a single channel for 40Gb/s optical transmission. Reversely, on the receiver side, the module optically de-multiplexes a 40Gb/s input into 4 CWDM channels signals, and converts them to 4 channel output electrical data. The central wavelengths of the 4 CWDM channels are 1271, 1291, 1311 and 1331 nm. It contains a duplex LC connector for the optical interface and a 38-pin connector for the electrical interface. Single-mode fiber (SMF) is applied in this module. This product converts the 4-channel 10Gb/s electrical input data into CWDM optical signals (light), by a 4-wavelength Distributed Feedback Laser (DFB) array. The 4 wavelengths are multiplexed into a single 40Gb/s data, propagating out of the transmitter module via the SMF. The receiver module accepts the 40Gb/s optical signals input, and de-multiplexes it into 4 CWDM 10Gb/s channels. Each wavelength light is collected by a discrete photo diode, and then outputted as electric data after amplified by a TIA. The product is designed with form factor, optical/electrical connection and digital diagnostic interface according to the QSFP+ Multi-Source Agreement (MSA) and compliant to 40G QSFP+ LR4 of IEEE 802.3ba.

· Supports 41.2 Gb/s aggregate bitrates

· Uncooled 4x10Gb/s transmitter

· Maximum link length of 10km on Single Mode Fiber (SMF)

· Hot-pluggable QSFP+ footprint

· Duplex LC receptacles

· Power consumption<3.5W

· RoHS-6 compliant and lead-free

· Single 3.3V power supply

· Support Digital Diagnostic Monitor interface

· Case operating temperature

Commercial: 0°C to +70°C

Absolute Maximum Ratings

Parameter	Symbol	Min.	Typ.	Max.	Unit	Note
Storage Temperature	TS	-40		85	°C
Storage Ambient Relative Humidity	HA	0		85	%
Maximum Supply Voltage	VCC1, VCCTX, VCCRX	-0.5		3.6	V
Signal Input Voltage		-0.3		Vcc+0.3	V
Receiver Damage Threshold		+3.4			dBm
Lead Soldering Temperature/Time	TSOLD			260/10	°C/sec	1
Lead Soldering Temperature/Time	TSOLD			360/10	°C/sec	2

    Notes:
       1. Suitable for wave soldering.
2.        Only for soldering by iron.

General Product Characteristics

Parameter	Value	Unit	Note
Module Form Factor	QSFP+
Number of Lanes	4 Tx and 4 Rx
Maximum Aggregate Data Rate	41.2
Maximum Data Rate per Lane	10.3125		Higher bit rates may be supported. Please contact Ascent
Protocols Supported	Typical applications include 40G Ethernet
Management Interface	Serial,I2c-based,400kHz maximum frequency		As defined by the QSFP+ MSA

Data Rate

Parameter	Symbol	Min.	Typ.	Max.	Unit	Note
Storage Temperature	BR			10313	Mb/s	1
Storage Ambient Relative Humidity	BER			10-12		2
Signal Input Voltage	d			10	km	3

Notes:
1. Compliant with 40GBASE-LR4 and XLPPI per IEEE 802.3ba. Compatible with 1/10 Gigabit Ethernet and 1/2/4/8/10G Fibre Channel.
2. Tested with a PRBS 231-1 test pattern.
3. Per 40GBASE-LR4, IEEE 802.3ba.

Optical Parameters

Parameter	Symbol	Min.	Typ.	Max.	Unit
Transmitter
Total Average Launch Power	POUT			8.3	dBm
Average Output Power per lane	POUT	-7		2.3	dBm
Transmit OMA per Lane	TxOMA	-4.0		3.5	dBm
Extinction Ratio	ER	3.5			dB
Center Wavelength	λ_C	1264.5	1271	1277.5	nm
		1284.5	1291	1297.5	nm
		1304.5	1311	1317.5	nm
		1324.5	1331	1337.5	nm
Side-mode Suppression Ratio	SMSR	30	-	-	dB
Transmitter and Dispersion Penalty	TDP			3.5	dB
Transmitter OFF Output Power	POff			-30	dBm
Transmitter Eye Mask Definition {X1, X2, X3, Y1, Y2, Y3}		{0.25, 0.4, 0.45, 0.25, 0.28, 0.4}
Receiver
Input Optical Wavelength	λ_IN	1264.5	1271	1277.5	nm
		1284.5	1291	1297.5	nm
		1304.5	1311	1317.5	nm
		1324.5	1331	1337.5	nm
Rx Sensitivity per lane	RSENS1			-11.5	dBm
Rx Sensitivity(OMA)	RSENS2			-9.6	dBm
InputSaturation Power (Overload)	PSAT			+3.4	dBm
Receiver Reflectance	Rfl			-12	dBm
Loss of Signal Assert	PA	-30			dBm
Loss of Signal De-assert	PD			-12.5	dBm
LOS Hysteresis	PD - PA	0.5		6	dB

Notes:
1. Even if TDP is<0.9dB, the OMA min must exceed this value.

Electrical Characteristics

Parameter	Symbol	Min.	Typ.	Max.	Unit	Note
Supply Voltage	VCC1,	3.15		3.45	V
	VCCTX,	3.15		3.45	V
	VCCRX	3.15		3.45	V
Transmitter
Input different impedance	Rin	90	100	110	Ω	2
Single ended data input swing	Vin,pp	120		820	mV
Transmitter Disable Voltage	VDIS	2		VCC	V	3
Transmitter Enable Voltage	VEN	0		0.8	V
Data Dependent Input Jitter	DDJ		0.3		UI
Receiver
Output different impedance	Rout	90	100	110	Ω	2
Single ended data output swing	Vout,pp	340		850	mV	4
LOS Asserted	V_LOSA	2		VCCHOST	V	5
LOS De-asserted	V_LOSD	0		0.8	V	5
Power Supply Rejection	PSR	50			mVpp

Notes:
    1.         Maximum total power value is specified across the full temperature and voltage range.
    2.         Connected directly to TX data input pins. AC coupled thereafter.
    3.         Or open circuit.
    4.         Into 100Ω differential termination.
    5.         Loss of Signal is LVTTL. Logic “0”indicates normal operation; logic “1” indicates no signal detected.