Ascent Communication Technology

40G QSFP+ BIDI 100m

Ascent’s QSFP-40G-BIDI Transceiver is a four-channel pluggable LC duplex fiber optic QSFP Transceiver for Gigabit Ethernet Applications. This transceiver is a high- performance module for short range duplex data communication and interconnect applications. This module integrates four electrical data lanes in each direction into transmission over a single LC duplex fiber optic cable. Each electrical lane operates at 10.3125 Gbps and conforms to the 40GE XLPPI interface. The transceiver internally multiplexes an XLPPI 4x 100G interface into two 20 Gb/s electrical channels transmitting and receiving each optically over one simplex LC fiber using bi-directional optics This results in an aggregate bandwidth of40 Gbps into a duplex LC cable This allows reuse of the installed LC duplex cabling infrastructure for 40 GbE applications. Link distances up to 70m using OM3 and 100m using OM4 optical fiber are supported. These modules are designed to operate over multimode fiber systems using a nominal wavelength of 850 nm on one end and 900 nm on the other end. The electrical interface uses a contact QSFP type edge connector. The optical interface uses a conventional LC duplex connector

· 40G Link Distances up to 70m over OM3, 100m over OM4

· Hot Pluggable

· Dual Wavelength VCSEL Bi-Directional Optical Interface, NRZ 2x20Gbps 850nm/908nm

· Interface with Digital monitoring and maskable Interrupts for Ex-panded functionality

· This product does not rely on any agreement, only this document prevails

· Operating Mode

· 4x10G NRZ to 2x20G NRZ

· Case Operating Temperature: Range: 0 to 70°C

· RoHS II Compliance

Absolute Maximum Ratings

Parameter	Symbol	Min.	Max.	Unit
Storage Ambient Temperature	Tstg	-40	+85	°C
Relative Humidity - Storage	RHS	0	95	%
Relative Humidity - Operating	RHO	0	85	%
Module Supply Voltage	V_CC	-0.5	3.6	V

Recommended Operating Conditions

Parameter	Symbol	Min.	Typ.	Max.	Unit	Notes
Case Operating Temperature	Tcase	0	+25	+70	°C
Module Supply Voltage	V_CC	3.135	3.3	3.465	V
Signaling Speed per Electrical Channel(4x10G NRZ)	S	-	10.3125	-	Gb/s
Power Consumption	P	-	-	3.5	W

Electrical Characteristics

Parameter	Symbol	Min	Typ.	Max	Unit	Notes
Transmitter
Tx_Data Differential Input Voltage	V_IN	200	-	900	Gbps
Tx_Data Differential Input Impedance	Z_IN	-	100	-	W
Receiver
Rx_Data Differential Output Voltage	V_OUT	-	-	1200	mV
Rx_Data Differential Output Impedance	Z_OUT	-	100	-	Ω
Timing Requirement of Control and Status I/O
Tx Squelch Deassert Time	toff_Txsq	-	-	4	s
Rx Squelch Deassert Time	toff_Rxsq	-	-	2	s
Non-Volatile Memory
Complete Single or Sequential Write	twr	-	-	80	ms
Endurance (Write Cycles)		20k	-	-	cycle
Soft Control and Status Timing Requirements
Application or Rate Select Change Time	t_ratesel	-	-	600	ms

Optical Characteristics Center Wavelength 2

Parameter	Symbol	Min	Typ.	Max	Unit	Notes
Transmitter
Average Launch Power ,each Lane	P_OUT	-6.2	-	4	dBm	Average Optical Output TP2
Optical Modulation Amplitude , each Lane	OMA	-4.2	-	3	dBm	TP2
Optical Output with Tx OFF	P_OFF	-	-	-30	dBm	TP2
Center Wavelength 1	λ	840	850	868	nm	TP2
Center Wavelength 2	λ	868	908	918	nm	TP2
RMS Spectral Width	Δλ	-	-	0.65	nm	TP2
Optical Return Loss Tolerance	ORL	-	-	12	dB	TP2
20.625 Gb/s Eye Mask: X1, X2, X3, Y1, Y2, Y3	TDECQ		{0.3, 0.38, 0.45, 0.35, 0.41, 0.5}		dB	1 TP2
Receiver
Average Power at Receive Input, each Lane	P_IN	-8.2	-	4	dBm	2 TP3
Receive Power, each lane (OMAouter)	P_IN(OMA)	-	-	3	dBm	TP3
Unstressed Receiver Sensitivity (OMAouter), each lane	Sen	-	-	-7.1	dBm	3 TP3
Center Wavelength1	λ	840	850	868	nm	TP3
Center Wavelength2	λ	868	908	918	nm	TP3
Receiver Reflectance	RFL	-	-	-12	dB	TP3
Rx_LOS of Signal - Assert	PA	-30	-	-	dBm	TP3
Rx_LOS of Signal - Deassert	PD	-	-	-5.9	dBm	TP3
Rx_LOS of Signal - Hysteresis	PHy	0.5	-	-	dB	TP3

Notes:
    1.       Hit Ratio = 1.5x10-3; TP1 TX input electrical signal is 10.3125Gbps, pattern 2^9- 1.
    2.       A received power below this value cannot be compliant; however, a value above this does not ensure compliance.
    3.       BER on the RX side: 1E- 12.