HFCT-5911QTLZ Avago Technologies US Inc., HFCT-5911QTLZ Datasheet - Page 3

• Manufacturer Part Number: HFCT-5911QTLZ
• Description: TXRX SMF LC 1.25GBD 2X5 EXT TEMP
• Manufacturer: Avago Technologies US Inc.

Specifications of HFCT-5911QTLZ

• Data Rate: 1.25Gbps
• Wavelength: 1310nm
• Applications: Ethernet
• Voltage - Supply: 3.1 V ~ 3.5 V
• Connector Type: LC Duplex
• Mounting Type: Through Hole
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Functional Description
Transmitter Section
Design
A schematic diagram for the transmitter is shown in Fig-
ure 2. The HFCT-5911ATLZ incorporates an FP laser and
has been designed to be compliant with IEC 825 eye
safety requirements under any single fault condition
and CDRH under normal operating conditions. The opti-
cal output is controlled by a custom IC that detects the
laser output via the monitor photodiode. This IC pro-
vides both dc and ac current drive to the laser to ensure
correct modulation, eye diagram and extinction ratio
over temperature, supply voltage and operating life.
Figure 2. Simplified Transmitter Schematic
3
DATA
DATA
INPUT
PECL
MODULATOR
LASER
LASER BIAS
LASER BIAS
CONTROL
DRIVER
LASER
FP
(rear facet monitor)
PHOTODIODE