HFM2010
Fiber Optic Transmitter Module
OUTLINE DIMENSIONS in inches (mm)DESCRIPTION
FEATURES
DC to 10 Mb/s NRZ
•
Dynamic or static selection of power output
•
"Cap Rock" LED couples to variety of fibers
•
Operation on single +5 V supply
•
The HFM2010 transmitter module is an electrical to
optical interface unit designed for point digital data
transmission. The Low Profile Module provides both the
electronics and the mechanical interface necessary to
convert a TTL level input into an optically encoded output.
The HFM2010 module's bipolar MASTERSLICE IC and
CAP ROCK LED produce an encoded three level optical
signal that is independent of data format such that
biphase (Manchester) encoded data, NRZ data or any
other format can be transmitted. Internal voltage
regulation allows adjustment-free operation over the full
operating temperature range without external power
supply filtering.
A unique feature of these modules allows the user to
select power output to fit the application need. The
module's binary encoded power output select inputs can
be driven by open collector or standard TTL to
dynamically select the power output, or they can be
shorted to ground (or left open) to statically select power
output.
Another unique module feature allows the user to select
the type of optical receptacle to fit to the application. The
module's mechanical interface is simple enough to allow
custom designed receptacles as well as the standard
SMA style. The "sweet spot" of light projected into either
connector provides for easy alignment of a variety of
glass and plastic fibers.
20
0.32 (8.1)
0.13 (3.3)
0.10 (2.5) MIN
0.44
(11.2)
0.88
(22.4) 0.88
(22.4)
0.16 (4.1)
0.30 (7.6)
0.40 (10.2)
0.50 (12.7)
0.60 (15.2)
0.40
(10.2)
0.96 (24.4)
1.23 (31.2)
0.62 (15.7)
2-56 UNC-2B
2PLACES
0.040 (1.02) DIA
PIN 2 PLACES
0.07 (1.8)
1234
9876
5
10
0.20 (5.1)
1234
9876
5
10
FIBER027.DIM
FIBER017 TIF
Pinout
1. P¦ power output select
2. P¢ power output select
3. P§ power output select
4. DS driver select
5. GND ground
6. GND ground
7. IHB inhibit
8. I Data input
9. ENB enable
10 VÙÙ power supply
Honeywell reserves the right to make
changes in order to improve design and
supply the best products possible. h563
HFM2010
Fiber Optic Transmitter Module
APPLICATION
(
continued
)
The Trilevel Transparent Code (TTC) optical signal is
represented by three optical power levels:
a. LOW - zero power out
b. Hl - maximum power out (PÝ)
c. OFF - 1/2 maximum power out (PÏ)
This three level optical signal is therefore analogous to a
bipolar voltage signal (+, -, zero) in a conventional
system.
The TTC encoder incorporated in the MASTERSLICE IC
encodes a positive going input signal transition into a
50 ns wide LOW optical pulse and a negative going
transition into a HI optical pulse. In addition, the encoder
provides the appropriate width refresh pulse when the
input is not transitioning. For TTL low input, HI refresh
pulses are generated and output, and for TTL high input,
LOW refresh pulses are output. The refresh pulses are
required by the Receiver Module (HFM1011) to aid in
decoding the trilevel optical signal back into the original
TTL signal.
The TTL encoding scheme makes the HFM2010 to
HFM1011 fiber optic link "transparent" to data format.
Any input pulse width from DC to 100 ns will be
reproduced at the link output. Narrower pulse widths
require special versions (internal module capacitor
changes) of the HFM2010 module.
The Data Input (pin 8) drives an internal gate that has
50 mV of hysteresis. Therefore, there is no limit to the
rise/fall time of the input signal. An internal Schottky
diode clamp on the Data Input limits negative overshoot
to less than 1 V.
The Power Output Selection inputs (pins 1, 2, 3) are
used to statically or dynamically select the power output
(see POWER OUTPUT SELECTION TABLE). With
none of the select inputs grounded, 100% of the average
power output (PÏ) is selected. Grounding any of the
inputs reduces the optical power out and also the
module power dissipation.
Note
IÙÙ varies with PÏ selected. Typical values are:
IÙÙ = (80 + (% x .9) mA, where % is given in the
POWER OUTPUT SELECTION TABLE.
Example
For P¢ = 1, P¦ = 1, P§ = 0, IÙÙ = 80 + (50 x .9) = 125.
Notes
1. For PC board mounting, optical connector must
overhang PC board edge to attach fiber cable.
2. For panel mounting, maximum recommended panel
thickness is 0.156 in (3.96 mm).
3. Penetration greater than 0.09 (23) into tapped holes
may damage module.
Honeywell reserves the right to make
changes in order to improve design and
supply the best products possible.
564 h
HFM2010
Fiber Optic Transmitter Module
Stresses greater than those listed under "Absolute
Maximum Ratings" may cause permanent damage to the
device. This is a stress rating only and functional
operation of the device at these or any other conditions
above those indicated in the operational section of this
specification is not implied. Exposure to absolute
maximum rating conditions for extended periods of time
may affect reliability.
ABSOLUTE MAXIMUM RATINGS (continued)
ABSOLUTE MAXIMUM RATINGS
(25¡C Free-Air Temperature unless otherwise noted)
-65 to +150¡CStorage temperature
-55 to +100¡CCase operating temperature
260¡C, 10 sLead solder temperature
-0.5 to +7 VSupply voltage (VÙÙ)
Input voltage
-0.5 to +5.5 V VÛ, VåÜ£, VÛÝ£
-0.5 to +0.9 V V°Ø
VÙÙ V΢, VΦ, VΧ
Notes
1. The input voltage must be limited to 5.5 V max. even though VÙÙ
may be 7.0 V.
TEST CONDITIONS
TYP
ELECTRO-OPTICAL CHARACTERISTICS(Values shown apply over ranges given in Recommended Operating
Conditions unless otherwise stated. For TYP values VÙÙ=5.0 V and
TÙ=25¡C)
UNITS
MINPARAMETER SYMBOL MAX
VÛ = 2.4 VHi
g
h Level In
p
ut Current IÛÝ
µ
W140
VÛ = 0.4 VLow Level In
p
ut Current IÛÚ mA-1.2 -1.6
V΢
,
¦
,
§ = 0.4 VI΢
,
¦
,
§mA-2.3 -4.5
V΢
,
¦
,
§ = VÙÙ
,
VÛ = 0.4 VSu
pp
l
y
Current [À] IÙÙ mA170 240
Data in
p
ut = 5 MHz
,
s
q
uarePower Out
p
ut PÞ
µ
W
wave
,
measured out of 10 m
(
avera
g
e
)
of 100
µ
m core fiber
,
NA = 0.28
,
VÙÙ = 5.0 V
,
TÙ = 25¡C100 140HFM2010-2X4
V΢
,
¦
,
§ = VÙÙ
,
VÛ = 0.4 VPÞ Tem
p
erature Coefficient êPÞ dB/¡C-0.012
Pulse Am
p
litude S
y
mmetr
y
[Á] K 0.8 1.2
(
=
(
PÝ-PÞ
)
/PÞ
)
TÙ = 25¡CPeak Wavelen
g
th æÎ nm800 850 900
Pro
p
a
g
ation Dela
y
[Â] tÎÚÝ/tÎÝÚ ns13 23
O
p
tical Pulse Width ns
tÎ Data 40 50 60
tÎ Refresh 35 50 75
Refresh Pulse Re
p
etition Rate fß MHz0.7 1.1 2
Notes
1. IÙÙ varies with PÞ selected. Typical values are IÙÙ= ( 80 + ( % x .9)) mA, where % is given in the POWER OUTPUT SELECTION
TABLE. EXAMPLE: For P¢=1, P¦=2, P§= 0, IÙÙ= 80 + ( 50 x .9) = 125 mA.
2. K= ( PÝ - PÞ)/PÞ is a measure of the difference in amplitude between a HIGH pulse and a LOW pulse.
3. The refresh pulse is interrrupted if Data Input (VÛ) changes state during the refresh pulse. Min. propagation delay (typical
reduction -3 ns) occurs for Data Input transitioning during the refresh pulse as shown in the OPTICAL ENCODING AND TIMING
DIAGRAM.
Honeywell reserves the right to make
changes in order to improve design and
supply the best products possible. h565
HFM2010
Fiber Optic Transmitter Module
RECOMMENDED OPERATING CONDITIONS
Case operating temperature -55 to +100¡C
Supply voltage (VÙÙ) +4.5 to +5.5 V
Input voltage [À]
V°Ø Open
VåÜ£ VÛ or VÙÙ
VÛÜ£ GND
High level input voltage [Á]
VÛÝ 2.4 V to VÙÙ
V΢Ý, VΦÝ, VΧÝ
Low level input voltage [Â]
VÛÚ 0 to +0.5 V
V΢Ú, VΦÚ, VΧÚ
Data input pulse width at 1.5 V points > 100 ns
BLOCK DIAGRAM
FIBER102.SCH
These three input input functions are not defined for Trilevel
Transparent optical code. They are used only in the Bilevel
code HFM2110 Transmitter Module. For proper module
operation, connect as follows:
Pin 9 to VÙÙ or Pin 8
Pin 7 to GND
Pin 4 leave open (do not connect).
The input voltage must be limited to 5.5 V max. even though
VÙÙ may be 7.0 V.
For dynamic power output selection, drive these inputs with
open collector or standard TTL. For static power select, either
GND the input or leave open, an internal pull-up is provided.
See POWER OUTPUT SELECTION TABLE for available
range
1.
2.
3.
Notes
RECOMMENDED OPERATING CONDITIONS
(continued)
OPTICAL ENCODING AND TIMING DIAGRAM
FIBER012.SCH
OPTICAL ENCODING AND TIMING DIAGRAM
FIBER025.SCH
Optical
Receptacle
Example: HFM 2010-224 contains a metal can (HFE4000)
LEDin an SMA receptacle with minimum
P
O
=100µW
HFM2010 - X X X
LED Type Power
Power (P
O
)
2 = Metal can
(HFE4000) 2=SMA 4=100µW
Honeywell reserves the right to make
changes in order to improve design and
supply the best products possible.
566 h
HFM2010
Fiber Optic Transmitter Module
OPTICAL ENCODING AND TIMING DIAGRAM
FIBER013.CIR
The inherent design of this component causes
it to be sensitive to electrostatic discharge
(ESD). To prevent ESD-induced damage
and/or degradation to equipment, take normal
ESD precautions when handling this product.
C
A
U
TI
O
N
Honeywell reserves the right to make
changes in order to improve design and
supply the best products possible. h567
