HFBR-0566 Avago Technologies US Inc., HFBR-0566 Datasheet - Page 8

• Manufacturer Part Number: HFBR-0566
• Description: Fiber Optic Development Tools MT-RJ 622Mb/s Fast E Evaluation Kit
• Manufacturer: Avago Technologies US Inc.

Specifications of HFBR-0566

• Description/function: Fiber Optic Kit
• For Use With/related Products: HFBR-5908E, HFCT-5908E
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Package footprint and front panel considerations
The Avago transceiver complies with the circuit board
“Common Transceiver Footprint” hole pattern defined in
the original multisource announcement which defined the
2 x 5 package style. This drawing is reproduced in Figure
6 with the addition of ANSI Y14.5M compliant dimension-
ing to be used as a guide in the mechanical layout of your
circuit board. Figure 7 shows the front panel dimensions
associated with such a layout.
Eye Safety Circuit
For an optical transmitter device to be eye-safe in the
event of a single fault failure, the transmit-ter must either
maintain eye-safe operation or be disabled.
The HFBR/HFCT-5908E utilizes an optical subassembly
consisting of a short piece of single mode fiber along
with a current limiting circuit to guarantee eye-safety. It
is intrinsically eye safe and does not require shut down
circuitry.
Figure 7. Recommended Panel Mounting
8
DIMENSIONS IN MILLIMETERS (INCHES)
NOTE: NOSE SHIELD SHOULD BE CONNECTED TO CHASSIS GROUND.
(0.425 ±0.004)
10.8 ±0.1
(0.55)
13.97
MIN.
(TOP OF PCB TO
(0.01 ±0.004)
BOTTOM OF
OPENING)
0.25 ±0.1
(0.386 ±0.004)
9.8 ±0.1
(0.15)
3.8
(0.039)
(0.589)
14.79
1
Signal Detect
The Signal Detect circuit provides a deasserted output
signal when the optical link is broken or when the trans-
mitter is OFF. The Signal Detect threshold is set to tran-
sition from a high to low state between the minimum
receiver input optical power and -35 dBm avg. input optical
power indicating a definite optical fault (e.g. unplugged
connector for the receiver or transmitter, broken fiber, or
failed far-end transmitter or data source). A Signal Detect
indicating a working link is functional when receiving
encoded 8B/10B characters. The Signal Detect does not
detect receiver data error or error-rate. Data errors can
be determined by signal processing offered by upstream
PHY ICs.