Ascent Communication Technology

100G QSFP28 BIDI 80km

The Q28-100G-BD-LU80/LD80 is a 100Gbps BIDI QSFP28 ZR4 lite transceiver, designed for extended-range applications with up to 80 km of 100GBase-BX throughput over single-mode fiber (SMF) using LC connectors. Its robust design enables reliable high-speed connectivity for data centers, storage area networks, and 100G Ethernet. This transceiver operates bidirectionally, supporting two wavelength configurations. The Q28-100G-BD-LD80 transmits at 1295.56, 1300.05, 1304.58, and 1309.14nm, while the Q28-100G-BD-LU80 transmits at 1273.54, 1277.89, 1282.26, and 1286.66nm, both with complementary reception wavelengths. For optimal use, it requires pairing with compatible devices of matching wavelengths. With digital diagnostics through its QSFP28 MSA-compliant I2C interface, the Q28-100G-BD-LU80/LD80 supports real-time monitoring of key parameters. Easy to install and hot-swappable, this transceiver is ideal for scalable, high-demand network environments, offering flexibility and reliability for long-distance data transmission.

· 4x25Gb/s LAN WDM Blue or Red Side TOSA, LAN WDM Red or Blue Side ROSA with SOA

· Support 100GBASE-ZR4 for line rate of 103.125Gbps and OTU4 for line rate of 111.81Gbps

· Compliant with IEEE 802.3-2012 Clause 88 standard IEEE 802.3bm CAUI-4 chip to module electrical

standard ITU-T G.959.1-2012-02 standard

· Simplex LC connector

· Single +3.3V power supply operating

· Temperature range 0°C to 70°C

· RoHS Compliant Part

Absolute Maximum Ratings

Parameter	Symbol	Min.	Typ.	Max.	Unit	Notes
Storage Temperature	Ts	-40		+85	°C
Supply Voltage	VccT, R	-0.5		+4	V
Operating Relative Humidity	RH	0		+85	%

Recommended Operating Conditions

Parameter	Symbol	Min.	Typ.	Max.	Unit	Notes
Operating Case Temperature	Tc	0		+70	°C
Power Supply Voltage	VccT, R	3.13	3.3	3.47	V
Power Supply Current	Icc		1200	1800	mA
Maximum Power Consumption	P_D			6.5	W

Electrical Characteristics (TOP = 0 to 70 °C, VCC = 3.13 to 3.47 Volts)

Parameter	Symbol	Min.	Typ.	Max.	Unit	Notes
Data Rate per Channel		-	25.78125		Gbps
			27.9525
Power Consumption		-	4	6.5	W
Supply Current	Icc		1.2	1.8	A
Control I/O Voltage-High	V_IH	2.0		Vcc	V
Control I/O Voltage-Low Inter-Channel Skew	V_IL	0		0.7	V
Control I/O Voltage-Low Inter-Channel Skew	TSK			35	Ps
RESETL Duration			10		Us
RESETL De-assert time				100	ms
Power On Time				100	ms
Transmitter
Single Ended Output Voltage Tolerance		0.3		Vcc	V	1
Common mode Voltage Tolerance		15			mV
Transmit Input Diff Voltage	VI	150		1200	mV
Transmit Input Diff Impedance	Z_IN	85	100	115
Data Dependent Input Jitter	DDJ		0.3		UI
Receiver
Single Ended Output Voltage Tolerance		0.3		4	V
Rx Output Diff Voltage	Vo	370	600	950	mV
Rx Output Rise and Fall Voltage	Tr/Tf			35	ps	1
Total Jitter	TJ		0.3		UI

Note:

1. 20 to 80%.

Optical Parameters (TOP = 0 to 70 °C, VCC = 3.0 to 3.6 Volts)

High-Speed Signal: Compliant to CAUI-4 (IEEE 802.3cu)

Low-Speed Signal: Compliant to SFF-8679.

Parameter	Symbol	Min.	Typ.	Max.	Unit	Notes
Transmitter(Module Input)
Blue Side Four Lane Wavelength Range	1	1272.54	1273.54	1274.54	nm
	2	1276.89	1277.89	1278.89	nm
	3	1281.25	1282.26	1283.27	nm
	4	1285.65	1286.66	1287.68	nm
Red Side Four Lane Wavelength Range	1	1294.56	1295.56	1296.56	nm
	2	1299.05	1300.05	1301.05	nm
	3	1303.58	1304.58	1305.58	nm
	4	1308.14	1309.14	1310.14	nm
Side-mode Suppression Ratio	SMSR	30	-	-	dB
Total Average Launch Power	PT	8	-	12.5	dBm
Average Launch Power, each Lane		+2	-	6.5	dBm
Difference in Launch Power between any two Lanes (OMA)		-	-	3	dB
Difference in Launch Power between any two Lanes (OMA)
Extinction Ratio	ER	6	-	-	dB
Transmitter Eye Mask Definition {X1, X2, X3, Y1, Y2, Y3}		{0.25, 0.4, 0.45, 0.25, 0.28, 0.4}				1
Transmitter Eye Mask Definition {X1, X2, X3, Y1, Y2, Y3}						1
Optical Return Loss Tolerance		-	-	20	dB
Average Launch Power OFF Transmitter, each Lane	Poff			-30	dBm
Relative Intensity Noise	Rin			-130	dB/HZ
Optical Return Loss Tolerance				20	dB
Transmitter Reflectance		-	-	12	dB
Receiver
Red Side Four Lane Wavelength Range	λ1	1272.54	1273.54	1274.54	nm
	λ2	1276.89	1277.89	1278.89	nm
	λ3	1281.25	1282.26	1283.27	nm
	λ4	1285.65	1286.66	1287.68	nm
Blue Side Four Lane Wavelength Range	λ1 λ2	1294.56	1295.56	1296.56	nm
	λ1 λ2	1299.05	1300.05	1301.05	nm
	λ3	1303.58	1304.58	1305.58	nm
	λ4	1308.14	1309.14	1310.14	nm
Total Damage Threshold	THd			5.5	dBm	1
Receiver Sensitivity per Lane	R			-28	dBm
Average Power at Receiver Input, each Lane	R	-28		0	dBm	1
LOS De-Assert	LOS_D			-29	dBm
LOS Assert	LOS_A	-40			dBm
LOS Hysteresis	LOS_H	0.5			dB

Note:

1. Sensitivity is specified at BER@5E-5 with FEC.

Timing for Soft Control and Status Functions

Parameter	Symbol	Max	Unit	Conditions
Initialization Time	t_init	2000	ms	Time from power on1, hot plug or rising edge of Reset until the module is fully functional2


Reset Init Assert Time	t_reset_init	2	μs	A Reset is generated by a low level longer than the minimum reset pulse time present on the ResetL pin.


Serial Bus Hardware Ready Time	t_serial	2000	ms	Time from power on1 until module responds to data transmission over the 2-wire serial bus


Monitor Data Ready Time	t_data	2000	ms	Time from power on1 to data not ready, bit 0 of Byte 2, deasserted and IntL asserted


Reset Assert Time	t_reset	2000	ms	Time from rising edge on the ResetL pin until the module is fully functional2


LPMode Assert Time	ton_LPMode	100	μs	Time from assertion of LPMode (Vin:LPMode =Vih) until module power consumption enters lower Power Level



IntL Assert Time	ton_IntL	200	ms	Time from occurrence of condition triggering IntL until Vout:IntL = Vol

IntL Deassert Time	toff_IntL	500	μs	toff_IntL 500 μs Time from clear on read3 operation of associated flag until Vout:IntL = Voh. This includes deassert times for Rx LOS, Tx Fault and other flag bits.




Rx LOS Assert Time	ton_los	100	ms	Time from Rx LOS state to Rx LOS bit set and IntL asserted
				Time from Rx LOS state to Rx LOS bit set and IntL asserted
Flag Assert Time	ton_flag	200	ms	Time from occurrence of condition triggering flag to associated flag bit set and IntL asserted


Mask Assert Time	ton_mask	100	ms	Time from mask bit set4 until associated IntL assertion is inhibited

Mask De-assert Time	toff_mask	100	ms	Time from mask bit cleared4 until associated IntlL operation resumes

ModSelL Assert Time	ton_ModSelL	100	μs	Time from assertion of ModSelL until module responds to data transmission over the 2-wire serial bus



ModSelL Deassert Time	toff_ModSelL	100	μs	Time from deassertion of ModSelL until the module does not respond to data transmission over the 2-wire serial bus



Power_over-ride or Power-set	ton_Pdown	100	ms	Time from P_Down bit set 4 until module power consumption enters lower Power Level
Assert Time

Power_over-ride or Power-set	toff_Pdown	300	ms	Time from P_Down bit cleared4 until the module is fully functional3
De-assert Time