AVAGO HFBR-2418TZ Compatible The 850-nm optical fiber The DC-50 MBd high-performance optoelectronic receiving device

Product Description
FTBR-1414xx / 2418xx series optical fiber transceiver devices, with 850nm multimode optical fiber, to provide high performance and low cost optical fiber communication links for industrial, power generation, medical, transportation and game applications, FTBR-1414xx under a 60 mA current drive, the minimum transmission distance of 2000 meters.

FTBR-1414xx / 2418xx is fully compatible with AVAGO’S HFBR-1414 / AFBR-2418 series, supports industrial standard ST fiber ports and offers optional with threads. FTBR-1414xx / 2418xx is suitable for a variety of fibers with fiber core diameter, including 50/125μm,62.5/125μ m, 100 / 140 μ m and 200 μ m.

FTBR-1414xx is a transmitter, packaged of a high power LED chip with a peak wavelength of 850nm. The 850nm multimode fiber with 62.5/125μ m core diameter output a typical optical power value of-14 dBm driven by 60 mA current.

The FTBR-2418xx consists of a high-gain span resistance amplifier with an integrated photodiode with CMOS / TTL logic output providing power monitoring (RSSI). To improve the stability of the output pulse width of the receiver, the receiver chip has designed the automatic artery width calibration circuit with the pulse width distortion within ± 5ns.      

Product characteristics
● Data transfer rate: DC-50 MBd
● Minimum transmission distance: 2,000m
● The output waveform pulse width is stable
● Provide the RSSI monitoring 
● Meet the industrial grade temperature range: -40℃ to 85℃
● Compliance the RoHS criteria  
● The power supply voltage supports 3.3V and 5V

Product application
● Factory automation
● Lan
● Audio and video apps / game apps
● Industrial networks and the fieldbus

Transmitter index

Pin	Name	Definition
1	NC	NC
2	Anode	LED positive pole
3	Cathode	LED negative pole
4	NC	NC
5	NC	NC
6	Anode	LED positive pole
7	Anode	LED positive pole
8	NC	NC

 

 

Transmitter pin definition
Absolute maximum rating

Parameter	Symbol	Min	Max	Unit	Explain
Storage temperature	Ts	-55	+85	℃
Working temperature	Ta	-40	+85	℃
Forward DC current	IF		100	mA
Backward voltage	VR		10	V	T=25℃
Circulating lead welding temperature			260/10	℃/s

Photoelectric performance parameters (operating temperature range-40℃ ~+85℃, power supply voltage range: 4.75V <Vcc<5.25V)  

Parameter	Symbol	Min	Typical	Max	Unit	Explain
50/125 μm optical fiber output	PT50	-19	-17	-15	dBm	IF=60mA, T=25℃
		-20		-14
62.5/125μm fiber output	PT62	-15	-14	-12.5	dBm	IF=60mA, T=25℃
		-16		-12
100 /140 μm optical fiber output	PT100	-10	-7	-5	dBm	IF=60mA, T=25℃
		-11		-4
The 200μm HCS optical fiber output	PT200	-6	-4	-2	dBm	IF=60mA, T=25℃
		-7		-1
Speed	DR	DC		50	MBd
Output optical power temperature coefficient	PT/T		-0.3		%/℃
Peak radiation wavelength	PK	845	850	855	nm
Direct voltage	VF	1.4	1.59	1.8	V	IF=60mA

Figure 2 shows the normalized output optical power curve of FTBR-1414xx and the output optical power corresponding to the normalized reference is 60 mA drive current, the left coordinate is the fold change, and the right coordinate is the dB change.    

The output optical power corresponding to other driving currents can be calculated by FIG. 2, for example below

The typical value of the output optical power of FTBR-1414xx under 60 mA driving current at normal temperature is-14 dBm. If the driving current of FTBR-1414xx is reduced to 30 mA, the output optical power is 0.5 times of the output optical current under 60mA driving current. It can be seen from the right coordinate that the output optical power changes by-3 dBm compared with that of the output driving current under 60mA, which is-17 dBm.

Receiver metrics
Receiver pin definition

Pin	Name	Definition
1	NC	NC
2	/DO	Reverse output
3	VCC	Chip power supply
4	NC	NC
5	NC	NC
6	RSSI	Power monitoring end
7	GROUND	Chip to
8	NC	NC

Absolute maximum rating

Parameter	Symbol	Min	Max	Unit	Explain
Storage temperature	Ts	-40	+85	℃
Working temperature	Ta	-40	+85	℃
Circulating lead welding temperature	Tsold		260/10	℃/s
Supply voltage	VCC	-0.5	5.5	V
Maximum DC output current	IO		10	mA

Photoelectric performance parameters (operating temperature range-40℃ ~+85℃, power supply voltage range Vcc=3.3V± 5% or 5V ± 5%)  

Parameter	Symbol	Min	Typical	Max	Unit	Explain
Peak wavelength	λ		850		nm
Speed	DR	DC		50	MBd
Input power at an output of 0	PRL	-24		+2	dBm	DR=50 MBd
Source current	ICC		20	30	mA
Output voltage at the high output level	VOH	2.4		VCC	V	RL=2kΏ
Output voltage at low output	VOL		0.2	0.4	V	RL=2kΏ
Output up time	TR			5	ns	CL=10pF
Output drop time	TF			5	ns	CL=10pF
Duty cycle deviation	PWD	-5		5	ns
The RSSI output responsiveness	IRSSI/PIN		0.65		A/W
The RSSI port voltage	VRSSI	0		VCC-1	V

Figure 3 RSSI output port voltage with input optical power 

Figure 4 RSSI responsiveness with temperature

Typical application circuit diagram

Figure 5. Typical application circuit diagram     

Dimdimensions of ST interface (FTBR-1414Z /2418Z)

Outline dimensions of ST interface with thread (FTBR-1414TZ / 2418TZ)

List of product models

Product model	Description
FTBR-1414Z	Transmitter device, and ST interface
FTBR-2418Z	Receive the device, and the ST interface
FTBR-1414 TZ	Transmitter device, threaded ST interface
FTBR-2418 TZ	Receiving device, threaded ST interface

 

Important Notice

Performance figures, data and any illustrative material provided in this data sheet are typical and must be specifically confirmed in writing by F-tone Networks before they become applicable to any particular order or contract. In accordance with the F-tone Networks policy of continuous improvement specifications may change without notice.

The publication of information in this data sheet does not imply freedom from patent or other protective rights of F-tone Networks or others. Further details are available from any F-tone Networks sales representative.