HFBR-0566 Avago Technologies US Inc., HFBR-0566 Datasheet - Page 7

• 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

The HFBR/HFCT-5908E feature a transmit disable function
which is a single-ended +3.3 V TTL input signal dc-coupled
to pin 8.
As for the receiver section, it is internally ac-coupled
between the preamplifier and the post-amplifier stages.
The actual Data and Data-bar outputs of the post-amplifier
are dc-coupled to their respective output pins (pins 4, 5).
Signal Detect is a single-ended, +3.3 V TTL output signal
that is dc-coupled to pin 3 of the module. Signal Detect
should not be ac-coupled externally to the follow-on
circuits because of its infrequent state changes.
Caution should be taken to account for the proper
intercon-nection between the supporting Physical Layer
integrated circuits and this HFBR/HFCT-5908E transceiver.
Figure 5 illustrates a recommended interface circuit for in-
terconnecting to a +3.3 V dc PECL fiber-optic transceiver.
Figure 6. Recommended Board Layout Hole Pattern
7
DIMENSIONS IN MILLIMETERS (INCHES)
NOTES:
1. THIS FIGURE DESCRIBES THE RECOMMENDED CIRCUIT BOARD LAYOUT FOR THE MT-RJ TRANSCEIVER PLACED
2. THE HATCHED AREAS ARE KEEP-OUT AREAS RESERVED FOR HOUSING STANDOFFS. NO METAL TRACES OR
3. 2 x 5 TRANSCEIVER MODULE REQUIRES 16 PCB HOLES (10 I/O PINS, 2 SOLDER POSTS AND 4 PACKAGE
4. THE SOLDER POSTS SHOULD BE SOLDERED TO CHASSIS GROUND FOR MECHANICAL INTEGRITY AND TO
AT .550 SPACING.
GROUND CONNECTION IN KEEP-OUT AREAS.
GROUNDING TABS).
PACKAGE GROUNDING TABS SHOULD BE CONNECTED TO SIGNAL GROUND.
ENSURE FOOTPRINT COMPATIBILITY WITH OTHER SFF TRANSCEIVERS.
(0.425)
(0.525)
13.34
10.8
KEEP OUT AREA
FOR PORT PLUG
(0.299)
(0.276)
7.59
7
(0.118)
3
(1.063)
27
(0.055 ±0.004)
Ø 1.4 ±0.1
(0.236)
(0.118)
6
3
(0.28)
7.11
(0.18)
4.57
17.78
(0.7)
(0.055 ±0.004)
Ø 1.4 ±0.1
(0.07)
1.778
(0.121)
3.08
(0.28)
7.112
Power Supply Filtering and Ground Planes
It is important to exercise care in circuit board layout to
achieve optimum performance from these transceivers.
Figure 5 shows the recommended power supply filter
circuit for the SFF transceiver. It is further recommended
that a contiguous ground plane be provided in the circuit
board directly under the transceiver to provide a low
inductance ground for signal return current. This recom-
mendation is in keeping with good high frequency board
layout practices.
(0.121)
3.08
(0.14)
3.56
Ø 2.29
10.16
(0.09)
(0.4)
(0.378)
9.59
(0.032 ±0.004)
Ø 0.81 ±0.1
(0.55)
13.97
MIN.
Holes For
Housing
Leads
(0.079)
2
(0.055 ±0.004)
Ø 1.4 ±0.1