HFBR-5104 Agilent(Hewlett-Packard), HFBR-5104 Datasheet - Page 7

• Manufacturer Part Number: HFBR-5104
• Description: FDDI/ 100 Mbps ATM/ and Fast Ethernet Transceivers in Low Cost 1x9 Package Style
• Manufacturer: Agilent(Hewlett-Packard)

FDDI PMD and LCF-PMD
standards without violating the
worst case output electrical jitter
allowed in the Tables E1 of the
Annexes E.
The jitter specifications stated in
the following 1300 nm
transceiver specification tables
are derived from the values in
Tables E1 of Annexes E. They
represent the worst case jitter
contribution that the transceivers
are allowed to make to the overall
system jitter without violating the
Annex E allocation example. In
practice the typical contribution
of the HP transceivers is well
below these maximum allowed
amounts.
Recommended Handling
Precautions
Hewlett-Packard recommends
that normal static precautions be
taken in the handling and
assembly of these transceivers to
prevent damage which may be
induced by electrostatic
discharge (ESD). The HFBR-
5100 series of transceivers meet
MIL-STD-883C Method 3015.4
Class 2 products.
Care should be used to avoid
shorting the receiver data or
signal detect outputs directly to
ground without proper current
limiting impedance.
Solder and Wash Process
Compatibility
The transceivers are delivered
with protective process plugs
inserted into the duplex SC or
duplex ST connector receptacle.
This process plug protects the
optical subassemblies during
wave solder and aqueous wash
processing and acts as a dust
cover during shipping.
132


              
These transceivers are compat-
ible with either industry standard
wave or hand solder processes.
Shipping Container
The transceiver is packaged in a
shipping container designed to
protect it from mechanical and
ESD damage during shipment or
storage.

 
 
  
Figure 7. Recommended Decoupling and Termination Circuits
TERMINATION
AT PHY
DEVICE
INPUTS
NOTES:
THE SPLIT-LOAD TERMINATIONS FOR ECL SIGNALS NEED TO BE LOCATED AT THE INPUT
R1 = R4 = R6 = R8 = R10 = 130 OHMS.
R2 = R3 = R5 = R7 = R9 = 82 OHMS.
C1 = C2 = C3 = C5 = C6 = 0.1 µF.
C4 = 10 µF.
L1 = L2 = 1 µH COIL OR FERRITE INDUCTOR.
OF DEVICES RECEIVING THOSE ECL SIGNALS. RECOMMEND 4-LAYER PRINTED CIRCUIT
BOARD WITH 50 OHM MICROSTRIP SIGNAL PATHS BE USED.
NO INTERNAL CONNECTION
V
Rx
R6
1
EE
RD
R5
RD
2
V
CC
C6
RD
R7
RD
3
R8

 
 

 
SD
SD
4
HFBR-510X
TOP VIEW
R10
R9
C1
TRANSCEIVER
V
AT V
C3
Rx
V
CC
5
CC
Board Layout - Decoupling
Circuit and Ground Planes
It is important to take care in the
layout of your circuit board to
achieve optimum performance
from these transceivers. Figure 7
provides a good example of a
schematic for a power supply
decoupling circuit that works well
with these parts. It is further
recommended that a contiguous
L1
V
CC
FILTER
CC
PINS
NO INTERNAL CONNECTION
V
Tx
CC
C4
6
L2


TD
C2
7
TD
TERMINATION
AT TRANSCEIVER
INPUTS
R1
TD
R2
8
V
CC
V
Tx
C5
R3
EE
9
R4
TD