1300 nm E-LED Transmitter
and PIN/Preamp Receiver for
Single-Mode Fiber
Technical Data
HFBR-0305 Series
Features
• Distances up to 14 km at
Signal Rates of 20 MBd
• Performance Specified with
Single-Mode Fiber Cables
• Wave Solder and Aqueous
Wash Process Compatible
• Panel Mount ST Connectors
• Pinout Compatible with
HFBR-0400 Series Parts
Transmitter
The HFBR-1315TM/1315M
single-mode fiber-optic trans-
mitter contains a 1300 nm edge-
emitting LED (E-LED) capable of
efficiently launching optical
power into single-mode fiber.
Because it is an LED, and not a
laser, the drive circuit is simple
and compatible with drive circuits
for multimode LED transmitters.
Package
HFBR-0305 Series transmitters
and receivers are housed in a
dual-in-line package made of high
strength, heat resistant, chemical
resistant, and UL V-0 flame
retardant plastic. The HFBR-
1315TM/1315M is a stainless
steel, threaded ST port (panel
mountable); the HFBR-1315M is
a stainless steel, unthreaded ST
port. The HFBR-2315T is a black,
non-conductive plastic threaded
ST port (panel mountable); the
HFBR-2315M is a stainless steel,
unthreaded ST port.
Applications
• Single-Mode Extensions to
Ethernet (10Base-F) Links
• Proprietary Links Using
Single-Mode Fiber
Receiver
The HFBR-2315T/2315M receiver
contains an InGaAs PIN
photodiode and a low-noise
transimpedance preamplifier
operating in the 1300 nm
wavelength region. The HFBR-
2315T/2315M receives an optical
signal and converts it to an
analog voltage. The buffered
output is an emitter-follower,
with a frequency response from
dc to typically 125 MHz.
Description
The HFBR-0305 Series is
designed to provide the most
cost-effective single-mode
solution, and is pin-compatible
with HP’s HFBR-0400 and HFBR-
0300 families of 820 and 1300
nm fiber optic links for multi-
mode fiber. This allows designers
to use a single circuit and board
layout for 820 nm multimode
fiber links, 1300 nm multimode
fiber links, and 1300 nm single-
mode fiber links. Upgrading a
multimode solution to single-mode
fiber is as simple as switching
components on a board.
Package Options
Metal Port
Transmitter:
Threaded
Unthreaded
Receiver:
Threaded
Unthreaded
HFBR-1315TM
HFBR-1315M
N/A
HFBR-2315M
Plastic Port
N/A
N/A
HFBR-2315T
N/A
36
5964-3544E (1/97)
ESD Handling
Precautions
The HFBR-0305 Series products
are MIL-STD 883C Method
3015.4 Class 1 devices. Normal
static precautions should be
taken in handling and assembly
of this component to prevent
damage and/or degradation which
may be induced by electrostatic
discharge (ESD)
Panel Mounting of
Threaded ST Package
Style
Any standard 3/8 - 32 UNEF-2B
threaded nut and washer can be
used to secure the threaded ST
receptacle to the chassis wall,
provided the overall thickness of
the chassis wall, washer and nut
are less than 5.1 mm (0.2 inch).
Hewlett-Packard supplies the
HFBR-4411 kit which consists of
100 each, nuts and washers per
the figure below.
3/8 – 32 UNEF-
2B THREAD
9.53 DIA.
(0.375)
12.70
DIA.
(0.50)
HEX-NUT
1.65
(0.065)
Flame Resistance
The HFBR-0305 Series package
is made with UL V-0 flame
retardant plastic material.
Electrostatic Discharge
(ESD)
Static discharges can occur to the
exterior of the equipment chassis
containing the HFBR-0305 Series
parts. To the extent that their
connector receptacles are
exposed to the outside of the
equipment chassis, they may be
subject to whatever ESD system
level test criteria that the
equipment is intended to meet.
Solder Processing
The HFBR-0305 Series products
are compatible with either hand
or wave solder processes. When
soldering, it is advisable to leave
the protective cap on the port to
keep the optics clean. Good
system performance requires
clean port optics and cable
ferrules to avoid obstructing the
optical path. Clean compressed
air is often sufficient to remove
particles of dirt; methanol on a
cotton swab also works well.
Radiated Susceptibility
Equipment utilizing these
products will be subject to EMI
fields in some environments.
These HFBR-0305 Series prod-
ucts are expected to withstand
fields of up to 10 volts per meter,
when tested on a circuit card in
free space without an equipment
chassis, with no measurable
effect on their performance. A
suggested test method is based
on the equipment procedure
specified in IEC 801-3.
14.27 TYP.
(0.563) DIA.
10.41 MAX.
(0.410) DIA.
WASHER
0.46
(0.018)
Wash Processing -
Chemical Resistance
The HFBR-0305 Series package
is compatible with the following
chemicals for cleaning and
degreasing:
- Aqueous Wash
- Naptha
- Alcohol (methyl, isopropyl,
isobutyl)
- Aliphatics (hexane, heptane)
The following chemicals are not
recommended as they will
damage the package: Partially
halogenated hydrocarbons such
as 1,1,1 Trichloroethane, Ketones
such as MEK, Acetone, Chloro-
form, Ethyl Acetate, Methylene
Dichloride and N-methylpyroldone.
NOTE: ALL DIMENSIONS IN MILLIMETRES AND (INCHES).
When preparing the chassis wall
for panel mounting, use the
mounting template in the figure
below. When tightening the nut,
torque should not exceed 0.8 N-m
(8.0 in-lb). Note that the maxi-
mum nut dimension exceeds the
width of the port package, so
approximately 2 mm of space
between device packages is
required to allow nuts to be
mounted on adjacent ports.
9.80
(0.386)
DIA.
8.0
(0.315)
37
Pinout Description
HFBR-1315TM/1315M
Transmitters
HFBR-2315T/2315M Receivers
Mechanical Dimensions
All dimensions are in millimeters
and (inches)
PART NUMBER
DATE CODE
5.05
(0.199)
YYWW
HFBR-X31XT
6
6
ANODE
3
CATHODE
PIN 1 INDICATOR
8
7
6
5
PIN 1 INDICATOR
BOTTOM VIEW
PIN
1†
2*
3
4†
5†
6
7
8†
FUNCTION
N.C.
N.C.
CATHODE
N.C.
N.C.
ANODE
N.C.
N.C.
BOTTOM VIEW
1
2
3
4
2
3, 7
V
CC
ANALOG
SIGNAL
V
EE
12.6
(0.495)
7.05
(0.278)
DIA.
4
3
2
1
5
6
7
8
29.8
(1.174)
12.6
(0.495)
PIN
1†
2
3*
4†
5†
6
7*
8†
FUNCTION
N.C.
SIGNAL
V
EE
N.C.
N.C.
V
CC
V
EE
N.C.
3.81
(0.150)
2.54
(0.100)
3/8-32 UNEF-2A
7.62
(0.300)
6.30
(0.248)
8.31
(0.327)
10.20
(0.400)
* THERE IS NO PIN 2. I.E., IN THE NUMBER 2
PIN POSITION, THERE IS NO PHYSICAL PIN.
† PINS 1, 4, 5, AND 8 ARE ISOLATED FROM
THE INTERNAL CIRCUITRY, BUT ARE
ELECTRICALLY CONNECTED TO EACH OTHER
AND TO THE METAL PORT.
* PINS 3 AND 7 ARE ELECTRICALLY
CONNECTED TO THE HEADER.
† PINS 1, 4, 5, AND 8 ARE ISOLATED FROM
THE INTERNAL CIRCUITRY, BUT ARE
ELECTRICALLY CONNECTED TO EACH OTHER
(AND TO THE PORT IF METAL).
3.60
(0.140)
2.54
(0.100)
1.27
(0.050)
5.10
(0.202)
PINS 1,4,5,8
0.51 X 0.38
(0.020 X 0.015)
PINS 2,3,6,7
0.46
DIA
(0.018)
4
1
8
2 3
7 6
5
PIN NO. 1
INDICATOR
Recommended Operating Conditions for HFBR-0305 Series Products
Parameter
Operating Temperature - Ambient
Supply Voltage
Symbol
T
A
V
CC
Min.
0
4.75
Typ.
Max.
70
5.25
Unit
°C
V
Reference
Note 1
Note:
1. The HFBR-2315T/2315M signal output is referenced to V
CC
, and does not reject noise from the V
CC
power supply. Consequently,
the V
CC
power supply must be filtered.
Link Performance: At Data Rates 1-20 MBd
Parameter
Optical Power Budget with
Single-Mode Fiber Cables
Link Distance with Single-
Mode Fiber Cables
Symbol
OPB
Min.
9
14
Typ.
18
Max.
Unit
dB
km
Conditions
0 to 70°C
0 to 70°C
Reference
Note 1
Note 2
Notes:
1. Optical Power Budget applies to HFBR-1315TM/1315M and HFBR-2315T/2315M in the recommended application circuit (Figures
1 and 2). Worst case transmitter coupled power (P
T
) is -27 dBm peak, -30 dBm average. Worst case receiver sensitivity is -36 dBm
peak, -39 dBm average. Refer to Application Note 1082 for details.
2. Link distance is based on fiber with 0.5 dB/km attenuation, and assumes 1 dB for loss of in-line splices or connectors, and 1 dB
margin for LED aging: (9 dB OPB - 1 dB in-line splice loss - 1 dB aging margin)/(0.5 dB/km) = 14 km.
38
+5 V V
cc
J100
J1
JUMPER
TTL IN
J102
ENABLE IN
J103
U4D
74ACT11000
8
7
9
C14
0.1 mF
J2
JUMPER
-DIFF. IN
J104
+DIFF. IN
J105
R5
510
Ω
2
3
LT 1016
U3
1
7
8
4, 5, 6
R6
510
Ω
C15
0.1 mF
12
13
5
4
U4C
74ACT11000
11
6
10
+
–
+
C16
10 mF
±
20%
0V SYSTEM
COMMON
J101
U4B
74ACT11000
15
3
14
U4A
74ACT11000
1
2
16
6
LED
3
HFBR-1315TM/1315M
NOTES:
1. ALL RESISTORS
±
5% UNLESS
OTHERWISE SHOWN
2. ALL CAPACITORS
±
10% UNLESS
OTHERWISE SHOWN
R9
390
Ω
R8
18
Ω
R7
18
Ω
C17
47 pF
Figure 1. Recommended Transmitter Circuit.
39
R1
10
Ω
C1
0.1 mF
D1
HLMP-4700
+5 V V
CC
C7
+ C6
10 mF 10 mF
±
20%
±
20%
+
C8
0.1 mF
0 V GND
U1
HFBR-2315T/2315M
C2
0.01 mF
2
3
1
3
7
4
C4
0.1 mF
C3
0.01 mF
4
VIN –
VIN +
V
REF
C TIMER
14
13
C10
0.047 mF
R2
1.2 K
Ω
1
LINK MON CMP EN
16
C9
0.1 mF
15
L1
4.7 mH
8
6
5
2
GND
VTH ADJ
5
6
VDC
CF2
12
U2
V
CC
ML4622
11
TTL OUT
ECL +
10
C12
0.1 mF
9
+DIFF. OUT
C11
0.1 mF
C5
4.7 pF
7
CF1
TTL OUT
8
NOTES:
1. C12, C13, R3, AND R4 ARE REQUIRED IF
THE TTL AND ECL OUTPUTS ARE USED
SIMULTANEOUSLY.
2. R3 AND R4 SHOULD NOT BE SMALLER
THAN 270 OHMS.
3. ALL RESISTORS
±5%.
4. ALL CAPACITORS
±10%
UNLESS OTHERWISE SHOWN.
GND TTL
ECL –
–DIFF. OUT
R3
R4
C13
0.1 mF
Figure 2. Recommended Receiver Circuit.
40
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