Ascent Communication Technology

40G QSFP+ PSM4 2 km

Ascent’s QSFP-AQ-MP-31-02 optical transceiver is intended for up to 2km reach service with four-lane 10.3125G data rate. It is based on 3.3V DC power supply and operates in the commercial temperature range. It is compliant with QSFP MSA, SFF-8436 and IEEE802.3ba-2018. Digital diagnostic functions are available via I2C interface, and the control functions can be achieved by LVTTL interfaces on the host, mainly including Module Select (ModSelL), Module Reset (ResetL), Low Power Mode (LPMode). The transceiver incorporates a four-laser array which is usually DFB, four-PIN diode array, an integrated four drivers and TIAs IC separately. The differential AC coupled Tx and Rx data interfaces are CML compatible.

· MPO-12 optical interface

· Maximum link length up to 2km

· Up to 10.3125Gb/s data links per lane

· +3.3 V power supply

· QSFP MSA compliant package

· Hot Pluggable

· High performance singal mode DML transmitter

· High sensitivity PIN/TIA optical receiver

· Single Mode operation

· BER < 1E-12@-13.6dBm (OMA)

· Case Operating temperature : 0 to 70 °C

· Data and Control Interfaces

· Tx Data CML/AC Coupled

· Rx Data CML/AC Coupled

· ModSelL LVTTL

· ResetL LVTTL

· ModPrsL LVTTL

· LPMode LVTTL

· 2-wire I2C communication bus

· RoHS 6 compliance

Absolute Maximum Ratings

Parameter	Symbol	Min.	Max.	Units	Notes
Storage Temperature	Tstg	-40	+95	°C
Case Operating Temperature	T_O	0	+70	°C
Relative Humidity - Storage	R_HS	0	95	%
Relative Humidity - Operating	R_HO	0	85	%
Supply Voltage	V_CC	-0.3	3.6	V

Recommended Operating Conditions

Parameter	Symbol	Min.	Typ.	Max.	Unit	Notes
Case Operating Temperature	Tcase	0	-	+70	°C
DC Supply Voltage	V_CC	3.135	-	3.465	V
Module Supply Current	I_in	-	-	1060	mA

Optical Characteristics

Parameter	Symbol	Min.	Typ.	Max.	Unit	Notes
Transmitter
Signaling Speed per Lane			10.3125±100ppm		Gbps
Lane Wavelength	L0	1295	1310	1325	nm
	L1	1295	1310	1325	nm
	L2	1295	1310	1325	nm
	L3	1295	1310	1325	nm
Side Mode Suppression Ratio	SMSR	30			dB
Average Launch Power\|Each Lane	Pavg	-7		2.5	dBm
Optical Modulation Amplitude\|Each Lane	OMA			2.5	dBm	1
Transmitter and Dispersion Penalty\|Each Lane	TDP			2.6	dB
Eye Mask coordinates: X1, X2, X3, Y1, Y2, Y3		{0.25, 0.4, 0.45, 0.25, 0.28, 0.4}			dBm
Average Launch Power of OFF Transmitter\|Each Lane				-30	dBm
Extinction Ratio	ER	3.5			dB
Spectral Width\|20dB				1	nm
Transmitter Reflectance				-12	dB
Optical Return Loss Tolerance				20	dB
Receiver
Signal Speed Per Lane			10.3125±100ppm		Gbps
Lane Wavelength	L0	1295	1310	1325	nm
Center Wavelength Lane 1	L1	1295	1310	1325	nm
Center Wavelength Lane 2	L2	1295	1310	1325	nm
Center Wavelength Lane 3	L3	1295	1310	1325	nm
Damage Threshold\|Each Lane	THd	2.5			dBm	2
Average Receive Power\|Each Lane		-11.6		2	dBm
Receiver Reflectance				-26	dB
Sensitivity OMA\|Each Lane [1]	Sen1			-11	dBm	3

Parameter	Symbol	Min.	Typ.	Max.	Unit	Notes
Stressed Receiver Sensitivity (OMA), each Lane				-8.6	dBm
LOS Assert	LOSA	-30	-		dBm
LOS Deassert	LOSD			-17	dBm
LOS Hysteresis	LOSH	0.5		5	dB
Vertical Eye Closure Penalty	VECP	1.9			dB	4
Stressed Eye J2 Jitter	J2	0.3			UI
Stressed Eye J4 Jitter	J4	0.47			UI

Notes:

1. Even if the TDP < 0.8dB, the OMA min must exceed the minimum value specified here.

2. The receiver shall be able to tolerate, without damage, continuous exposure to a modulated optical input

signal having this power level on one lane. The receiver does not have to operate correctly at this input power.

3. Measured with conformance test signal at receiver input for BER = 1e-12.

4. Vertical eye closure penalty and stressed eye jitter are test conditions for measuring stressed receiver sensitivity.

5. They are not characteristics of the receiver.

Electrical Characteristics

Parameter	Symbol	Min	Typ	Max	Unit	Notes
Transmitter
Differential Data input Swing	Vin	180	-	900	mV
Tx Differential Input Impendence	Zin	90	100	110	Ω
Tx Differential Output Impendence	Zout	45	50	55	Ω
ResetL Disable Voltage	Vr	2.0	-	V_CC+0.3	V
ResetL Enable Voltage	VrEN	0	-	0.8	V
ModSelL Disable Voltage	Vm	2.0	-	V_CC+0.3	V
ModSelL Enable Voltage	VmEN	0	-	0.8	V
Reciever
Differential Data Output Swing	Vout	180	-	900	mV
Rx Differential Output Impendence	Zout	90	100	110	Ω
IntL Assert Voltage	VInt	V_CC-0.5	-	V_CC+0.3	V
IntL De-assert Voltage	VDInt	0	-	+0.4	V

Digital Diagnostic

Parameter	Symbol	Spec	Units	Condition/Notes
Temperature	Te	+/-3	°C
Voltage	V_CC	+/-5%	V
IBias	BIAS	+/-10%	mA
Rx power	Rx-pwr	+/-3	dBm
Tx power	Tx-pwr	+/-3	dBm