HFBR-5961ALZ Datasheet, PDF (3/13 Pages) AVAGO TECHNOLOGIES LIMITED – Multimode Small Form Factor (SFF) Transceivers for ATM, FDDI, Fast Ethernet and SONET OC-3/SDH STM-1 with LC connector

RX TX
Mounting
Studs/Solder
Posts
Top
View
Pin 7 Transmitter Signal Ground V_EE TX:
Directly connect this pin to the transmitter ground
plane.
Pin 8 NC:
No connection.
Pin 9 Transmitter Data In TD+:
No internal terminations are provided. See recom-
mended circuit schematic.
RECEIVER SIGNAL GROUND
o1
10 o
TRANSMITTER DATA IN BAR
Pin 10 Transmitter Data In Bar TD-:
RECEIVER POWER SUPPLY
o2
SIGNAL DETECT
o3
RECEIVER DATA OUT BAR
o4
9o
TRANSMITTER DATA IN
8o
NC
No internal terminations are provided. See recom-
7 o TRANSMITTER SIGNAL GROUND ^{mended circuit schematic.}
RECEIVER DATA OUT
o5
6o
TRANSMITTER POWER SUPPLY
Mounting Studs/Solder Posts
Figure 2. Pin Out Diagram
Pin Descriptions:
The mounting studs are provided for transceiver me-
chanical attachment to the circuit board. It is rec-
ommended that the holes in the circuit board be
connected to chassis ground.
Pin 1 Receiver Signal Ground V_EE RX:
Directly connect this pin to the receiver ground plane.
Pin 2 Receiver Power Supply V_CC RX:
Provide +3.3 V dc via the recommended receiver power
supply filter circuit. Locate the power supply filter
circuit as close as possible to the V_CC RX pin.
Pin 3 Signal Detect SD:
Normal optical input levels to the receiver result in a
logic “1” output.
Low optical input levels to the receiver result in a logic
“0” output.
This Signal Detect output can be used to drive a PECL
input on an upstream circuit, such as Signal Detect
input of Loss of Signal-Bar.
Pin 4 Receiver Data Out Bar RD-:
No internal terminations are provided. See recom-
mended circuit schematic.
Pin 5 Receiver Data Out RD+:
No internal terminations are provided. See recom-
mended circuit schematic.
Application Information
The Applications Engineering group is available to assist
you with the technical understanding and design trade-
offs associated with these transceivers.You can contact
them through your Avago sales representative.
The following information is provided to answer some
of the most common questions about the use of these
parts.
Transceiver Optical Power Budget versus Link Length
Optical Power Budget (OPB) is the available optical
power for a fiber optic link to accommodate fiber cable
losses plus losses due to in-line connectors, splices,
optical switches, and to provide margin for link aging
and unplanned losses due to cable plant reconfigura-
tion or repair.
Avago LED technology has produced 1300 nm LED
devices with lower aging characteristics than normally
associated with these technologies in the industry.
The industry convention is 1.5 dB aging for 1300 nm
LEDs.The 1300 nm Avago LEDs are specified to expe-
rience less than 1 dB of aging over normal commercial
equipment mission life periods. Contact your Avago
sales representative for additional details.
Pin 6 Transmitter Power Supply V_CC TX:
Provide +3.3 V dc via the recommended transmitter
power supply filter circuit. Locate the power supply
filter circuit as close as possible to the V_CC TX pin.