HFCT5903E Avago Technologies US Inc., HFCT5903E Datasheet - Page 4

• Manufacturer Part Number: HFCT5903E
• Manufacturer: Avago Technologies US Inc.

Specifications of HFCT5903E

• Optical Fiber Type: TX/RX
• Data Transfer Rate: 125MBd
• Optical Rise Time: 2ns
• Optical Fall Time: 2ns
• Operating Temperature Classification: Commercial
• Peak Wavelength: 1360nm
• Operating Supply Voltage (min): 3.1V
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 3.5V
• Output Current: 30mA
• Operating Temp Range: 0C to 70C
• Mounting: Stud
• Pin Count: 10
• Lead Free Status / RoHS Status: Not Compliant

Functional Description
Transmitter Section
Design
The transmitter section uses a buried heterostruc-
ture Fabry Perot 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 modulation, eye diagram and extinction
ratio over temperature, supply voltage and life.
Figure 2. Simplified Transmitter Schematic
DATA
DATA
4
INPUT
PECL
MODULATOR
LASER
LASER BIAS
LASER BIAS
Solder and Wash Process Compatibility
The transceivers are delivered with protective process
plugs inserted into the MT-RJ connector receptacle. This
process plug protects the optical subassemblies during
wave solder and aqueous wash processing and acts as a
dust cover during shipping.
These transceivers are compatible with either industry
standard wave or hand solder processes. Each process
plug can only be used once during processing, although
with subsequent use, it can be used as a dust cover.
CONTROL
DRIVER
LASER
(rear facet monitor)
PHOTODIODE