100G CFP to QSFP28 Adapter

Description

The 100G CFP to QSFP28 Adapter module is a high performance, hot pluggable, and interconnect solution supporting 100G Ethernet and Telecom. The Adapter converts a CFP MSA interface to 1-port of 100GE QSFP28.It is compliant with the CFP MSA. Baudcom100G CFP to QSFP28 Adapter module converts 10 bidirectional 10G channels to 4 bidirectional 25G channels operating at up to 28Gbps per channel. The Adapter supports FEC (Forward Error Correction) function; the user can enable the FEC function through the register configuration.

As shown in Figure 1, the transmitter side of the adapter converts 10 parallel electrical data inputs to 4parallel electrical data output signals through a 10:4 multiplexing and associated circuitry. The receiver side of the adapter converts 4 parallel electrical signals into 10 parallel electrical signals through a 4:10 De multiplexing and associated circuitry.

Features

Compliant to CFP Hardware Specification Version 1.4

Compliant to CFP MSA Management Interface Specification Version 2.2

Converts 10 bidirectional 10G lanes to4 bidirectional 25G lanes

1 port QSFP28 TX&RX

Support 100G IEEE 802.3bj NRZ FEC

Transmission data rate up to 28Gbps per channel

OTU4 compatible（FEC is invalid when OTU4 data rate mode is on)

FEC is configurable

MDIO digital diagnostic interface and control capabilities

Power class 2 (Adapter<5W max)

Hot pluggable electrical interface

Operating case temperature:0°C~ +70°C

Single 3.3V power supply

RoHS 6 compliant(lead free) 

Applications

100GBE interconnects, IEEE 802.3ba 100GBASE-LR4(Adapter+QSFP28_LR4), IEEE 802.3bm 100GBASE-SR4(Adapter+QSFP28_SR4)

High-speed core router connections& Datacom/Telecom switch

Data aggregation and backplane applications

Proprietary protocol and density application

Specification

Absolute Maximum Ratings

Parameter	Symbol	Min	Max	Unit
Supply Voltage	Vcc	-0.5	3.6	V
Input Voltage	Vin	-0.3	Vcc+0.3	V
Storage Temperature	Tst	-20	85	oC
Humidity(non-condensing)	Rh	5	85	%

*Exceeding any one of these values may destroy the device immediately

Recommended Operating Conditions

Parameter		Symbol	Min	Typical	Max	Unit
Supply Voltage		Vcc	3.13	3.3	3.47	V
Operating Case temperature		Tca	0		70	oC
Data RatePer Lane	10GBE	fd	-	10.3125	11.2	Gbps
	25GBE			25.78125	27.952
Power Dissipation		Pm			5	W
Low Power Mode Dissipation		Plow			2	W
Aggregate Bit Rate		BRaggr		103.125	111.8	Gbps

Electrical Characteristics

Parameter		Symbol	Min	Typical	Max	Unit	Notes
Differential input impedance		Zin	90	100	110	ohm
Differential Output impedance		Zout	90	100	110	ohm
10GBE	Differential input voltage amplitude	ΔVin	120		820	mVp-p	1
	Differential output voltage amplitude	ΔVout	300		820	mVp-p	2
25GBE	Differential input voltage amplitude	ΔVin	300		1100	mVp-p	1
	Differential output voltage amplitude	ΔVout	500		900	mVp-p	2
Bit Error Rate		BER			E-12		3
Input Logic Level High		VIH	2.0		VCC+0.3	V	3.3V LVCOMS
			0.84		1.5	V	1.2V LVCOMS
Input Logic Level Low		VIL	-0.3		0.8	V	3.3V LVCOMS
			-0.3		0.36	V	1.2V LVCOMS
Output Logic Level High		VOH	VCC-0.2		VCC	V	3.3V LVCOMS
			1.0		1.5	V	1.2V LVCOMS
Output Logic Level Low		VOL	0		0.2	V	3.3V LVCOMS
			-0.3		0.2	V	1.2V LVCOMS

Note：

1. Differential input voltageamplitude is measured between TxnP and TxnN.
2. Differential output voltageamplitude is measured between RxnPand RxnN.
3. BER=10^-12; PRBS 2^31-1@10.3125Gbps/25.78125Gbps.

 

Reference Clock Characteristics

Parameter	Symbol	Min	Typical	Max	Unit	Notes
Impedance	Zd	80	100	120	Ω
Frequency			161.1328125 /644.53125	174.7030837 /698.8123348	MHz	1/64 or 1/16 ofelectrical lane rate
FrequencyStability	△f	-100		100	ppm	For Ethernetapplications
		-20		20		For Telecomapplications
OutputDifferentialVoltage	VDIFF	400		1200	mV	Peak to PeakDifferential
RMS jitter	σ			10	ps	Random Jitter. Overfrequency band of10KHz<f<10MHz
Clock DutyCycle		40		60	%
ClockRise/FallTime10%/90%	tr/f	200		1250	ps	1/64 of electrical lane rate
		50		315		1/16 of electrical lane rate

FEC control register

Address	AccessType	BitWidth		Description	Notes
0x91FC	R/W	1		0x0：Enable FEC. 0x1：Disable FEC.	FEC is invalid when OTU4 data rate mode is on

FEC control register 0x91FC supports reconfiguration and save function:

1. Write value to 0x91FC; 
2. Read the address 0xA004 = 0000h(Idle);
3. Save command, writes value 0001h to address 0x91F0;
4. Read status, wait until the address 0xA004 = 0004h(save success), and then read the address again 0xA004 = 0000h(Idle, read twice to ensure status is cleared).

       Normally saving needs about 1 second, but the longest time is about 4 seconds, we suggest customer can read 0xA004 after waiting for a while.

 

 Mechanical Dimensions