HFCT-5205A Avago Technologies US Inc., HFCT-5205A Datasheet - Page 4

• Manufacturer Part Number: HFCT-5205A
• Manufacturer: Avago Technologies US Inc.

Specifications of HFCT-5205A

• Optical Fiber Type: TX/RX
• Data Transfer Rate: 155Mbps
• Optical Rise Time: 2ns
• Optical Fall Time: 2ns
• Operating Temperature Classification: Industrial
• Peak Wavelength: 1360nm
• Operating Supply Voltage (min): 4.75V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.25V
• Output Current: 30mA
• Operating Temp Range: -40C to 85C
• Mounting: Through Hole
• Pin Count: 9
• Lead Free Status / RoHS Status: Compliant

Figure 3 - Simplified Transmitter Schematic
Functional Description - Transmitter Section
Design
The transmitter section, Figure 3, uses a Multiple
Quantum Well laser as its optical source. The package of
this laser is designed to allow repeatable coupling into
single mode fiber. In addition, this package has been
designed to be compliant with IEC 825 Class 1 and CDRH
Class I eye safety requirements. The optical output is
controlled by a custom IC which detects the laser output
via the monitor photodiode. This IC provides both dc and
ac current drive to the laser to ensure correct modula-
tion, eye diagram and extinction ratio over temperature,
supply voltage and life.
4
DATA
DATA
INPUT
PECL
MODULATOR
LASER
PCB mounting
The HFCT-5205 has two solderable mounting studs,
Figures 5 and 6. These studs are not electrically
connected. The transceiver is designed for common pro-
duction processes. It may be wave soldered and aqueous
washed providing the process plug is in place.
Each process plug can only be used once during process-
ing, although with subsequent use, it can be used as a
dust cover.
LASER BIAS
LASER BIAS
CONTROL
DRIVER
LASER
(rear facet monitor)
PHOTODIODE