-2
1 x 10
E1 of Annex 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
transceiver is well below the
maximum amount.
-3
-4
1 x 10
CENTER OF
SYMBOL
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
schematics for decoupling
circuits that work well with this
product. It is further recom-
mended 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 recommenda-
tion is in keeping with good high
frequency board layout practices.
1 x 10
-5
-6
1 x 10
1 x 10
-7
-8
1 x 10
1 x 10
-10
2.5 x 10
1 x 10
1 x 10
-11
-12
-6
-4
-2
0
2
4
RELATIVE INPUT OPTICAL POWER – dB
CONDITIONS:
1. 125 MBd
2. PRBS 2 -1
It is advised 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-511X Series meets
MIL-STD-883C Method 3015.4
Class 2.
7
3. CENTER OF SYMBOL SAMPLING.
4. T = 25° C
A
5. V
= 5 V
CC
dc
6. INPUT OPTICAL RISE/FALL TIMES = 1.0/2.1 ns.
The hole pattern shown in Figure
8 for the 2x11 package style
complies with the pin sizes
specified by the multisource
agreement. Hole patterns are also
provided for the Standard and
Narrow 1x13 package styles.
These drawings can be used as a
guide in the mechanical layout of
your circuit board.
Care should be taken to avoid
shorting the receiver Data or
Signal Detect outputs directly to
ground without proper current-
limiting impedance.
The Hewlett-Packard 1300 nm
transceivers are designed to
operate per the system jitter
allocations stated in Table E1 of
Annex E of the FDDI PMD
standard.
The HP 1300 nm transmitters will
tolerate the worst-case input
electrical jitter allowed in the
table without violating the worst-
case output optical jitter
requirement of Sections 8.1
Active Output Interface of the
FDDI PMD standard.
Each transceiver is delivered with
a protective port plug inserted
into the MIC receptacle. This port
process plug protects the optical
subassembly during wave solder
and aqueous wash processing and
acts as a dust cover during
shipping. The port process plugs
have been tested up to and found
to withstand 110 psi and 190°F.
The Applications Engineering
group has developed Gerber file
artwork for various fiber optic
transceiver layouts. Contact your
local Hewlett-Packard sales
representative for details.
The HP 1300 nm receivers will
tolerate the worst-case input
optical jitter allowed in Section
8.2 Active Input Interface of the
FDDI PMD standard without
violating the worst-case output
electrical jitter allowed in the
Table E1 of the Annex E.
These transceiver products are
intended to enable commercial
system designers to develop
equipment that complies with the
various international regulations
governing certification of Infor-
mation Technology Equipment.
See Table 1 for details. Additional
information is available from your
Hewlett-Packard sales
These transceivers are
compatible with either industry
standard wave- or hand-solder
processes.
Each transceiver is packaged in a
shipping container designed to
protect it from mechanical and
ESD damage during shipment or
storage.
The jitter specifications stated in
the following 1300 nm trans-
ceiver specification table are
derived from the values in Table
representative.
97
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