AB-QSFP28-20 -

Alpha Bridge AB-QSFP 28-20 Datasheet

Description

The 100Gb/s QSFP28 LR4 transceiver is compliant with the QSFP28 MSA and IEEE 802.3ba. QSFP28 LR4 transceiver modules are designed for use in 100 Gigabit Ethernet interfaces over single-mode fiber.

Features

Hot-pluggable QSFP28 form factor
Supports 1Gb/s aggregate bit rates
Maximum link length of 20KM on Single Mode Fiber (SMF)
Power dissipation < 5W
Built-in digital diagnostic functions
Built-in CDR
78Gb/s DFB-based LAN-WDM transmitter
Duplex LC receptacles
Single 3V power supply
RoHS compliant
Operating case temperature: 0~+70°C

Application

100GBASE-LR4 100G Ethernet

Absolute Maximum Ratings

Parameter	Symbol	Min	Typical	Max	Unit	Notes
Storage Temperature	Ts	-40	-	85	ºC
Maximum Supply Voltage	Vcc	-0.3	-	3.6	V
Operating Relative Humidity	RH	15	-	85	%

Recommended Operating Conditions

Parameter	Symbol	Min	Typical	Max	Unit	Notes
Data Rate	DR	25.78±100ppm			Gb/s	1
Bit Error Rate-25.78Gb/s	BER			1.00E-12		2
Operating Case Temperature	Tcase	0		70	ºC
Fiber Length on SMF	L			10	km

Pin Descriptions

Pin	Symbol	Name/Description	Ref.
1	GND	Ground	1
2	Tx2n	Transmitter Inverted Data Input
3	Tx2p	Transmitter Non-Inverted Data Input
4	GND	Ground	1
5	Tx4n	Transmitter Inverted Data Input
6	Tx4p	Transmitter Non-Inverted Data Input
7	GND	Ground	1
8	ModSelL	Module Select
9	ResetL	Module Reset
10	Vcc Rx	+3.3 V Power supply receiver
11	SCL	2-wire serial interface clock
12	SDA	2-wire serial interface data
13	GND	Ground	1
14	Rx3p	Receiver Non-Inverted Data Output
15	Rx3n	Receiver Inverted Data Output
16	GND	Ground	1
17	Rx1p	Receiver Non-Inverted Data Output
18	Rx1n	Receiver Inverted Data Output
19	GND	Ground	1
20	GND	Ground	1
21	Rx2n	Receiver Inverted Data Output
22	Rx2p	Receiver Non-Inverted Data Output
23	GND	Ground	1
24	Rx4n	Receiver Inverted Data Output
25	Rx4p	Receiver Non-Inverted Data Output
26	GND	Ground	1
27	ModPrsL	Module Present
28	IntL	Interrupt	2
29	Vcc Tx	+3.3 V Power supply transmitter
30	Vcc1	+3.3 V Power Supply
31	LPMode	Low Power Mode
32	GND	Ground	1
33	Tx3p	Transmitter Non-Inverted Data Input
34	Tx3n	Transmitter Inverted Data Input
35	GND	Ground	1
36	Tx1p	Transmitter Non-Inverted Data Input
37	Tx1n	Transmitter Inverted Data Input
38	GND	Ground	1

Electrical Specification

Parameter	Symbol	Min	Typical	Max	Units	Notes
Supply Voltage	Vcc	3.135		3.465	V
Supply Current	Icc			1.12	A
Module Total Power	P			3.5	W	1
Transmitter
Signaling rate per lane		25.78±100ppm			Gb/s
Differential input impedance	Zin	100	100		Ohm
Differential input voltage amplitude	Vin			900	mVp-p
Receiver
Signaling rate per lane		25.78±100ppm	Gb/s
Differential Output impedance	Zout		100		Ohm
Differential output voltage amplitude	Vout	400		900	mVp-p
Eye width		0.57			UI
Vertical eye closure				5.5	dB
Transition time, 20% to 80%	Tr/Tf	12			ps

Optical Specification

Parameter	Symbol	Min	Typical	Max	Units	Notes
Transmitter
Signaling rate per lane		25.78125±100ppm			Gb/s	1
Center wavelength	λ	1294.53 – 1296.59			nm
		1299.02 – 1301.09
		1303.54 – 1305.63
		1308.09 – 1310.19
Sidemode Suppression ratio	SMSR	30			nm
Transmit OMA per Lane	TXP	-1.3		4.5	dBm
Transmit Average Power per Lane	Pout	-4.3		4.5	dBm
Optical Extinction Ratio	ER	4			dB
Average launch power of				-30	dBm
Optical return loss tolerance	RL			20	dB
Relative Intensity Noise	RIN			-130	dB/Hz
Transmitter eye mask definition {X1, X2, X3, Y1, Y2, Y3}		{0.25, 0.4, 0.45, 0.25, 0.28, 0.4}				2
Receiver
Signaling rate per lane		25.78125±100ppm			Gb/s	1
Center wavelength	λ	1294.53 – 1296.59			nm
		1299.02 – 1301.09
		1303.54 – 1305.63
		1308.09 – 1310.19
Average Receive Power per Lane	RXP	-10.6		4.5	dBm
Receive Power (OMA) per Lane	RxOMA			4.5	dBm
Receiver Reflectance	Rfl			-26	dB
Receive Sensitivity in OMA, each Lane	SEN			-8.6	dBm
LOS De-Assert	LOSD			-11.6	dBm
LOS Assert	LOSA	-24			dBm
LOS Hysteresis	LOSh	0.5			dB

Ordering Information

Part Number	Description
AB-QSFP28-20	100Gbps QSFP28 LAN WDM4, LC, 20KM, 0°C~+70°C, with DDM