FOD2742R2VC [FAIRCHILD]
Transistor Output Optocoupler, 1-Element, 2500V Isolation;
| 型号： | FOD2742R2VC |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | Transistor Output Optocoupler, 1-Element, 2500V Isolation |
| 文件： | 总16页 (文件大小：297K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
April 2009
FOD2742A, FOD2742B, FOD2742C
Optically Isolated Error Amplifier
Features
Description
■ Optocoupler, precision reference and error amplifier in
The FOD2742 Optically Isolated Amplifier consists of the
popular KA431 precision programmable shunt reference
and an optocoupler. The optocoupler is a gallium
arsenide (GaAs) light emitting diode optically coupled to
a silicon phototransistor. It comes in 3 grades of
reference voltage tolerance = 2%, 1%, and 0.5%.
single package
■ 2.5V reference
■ CTR 100% to 200%
■ 2,500V RMS isolation
■ UL approval E90700, Volume 2
■ BSI approval 8661, 8662
■ VDE approval 136616
The Current Transfer Ratio (CTR) ranges from 100% to
200%. It also has an outstanding temperature coefficient
of 50 ppm/°C. It is primarily intended for use as the error
amplifier/reference voltage/optocoupler function in
isolated ac to dc power supplies and dc/dc converters.
■ CSA approval 1113643
■ Low temperature coefficient 50 ppm/°C max.
■ FOD2742A: tolerance 0.5%
FOD2742B: tolerance 1%
FOD2742C: tolerance 2%
When using the FOD2742, power supply designers can
reduce the component count and save space in tightly
packaged designs. The tight tolerance reference
eliminates the need for adjustments in many
applications. The device comes in a 8-pin small outline
package.
Applications
■ Power supplies regulation
■ DC to DC converters
Schematic
Package Outline
NC
LED
1
8
FB
2
3
4
7
6
5
C
E
COMP
GND
NC
©2003 Fairchild Semiconductor Corporation
FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1
www.fairchildsemi.com
Pin Definitions
Pin Number
Pin Name
Functional Description
1
2
3
4
5
6
7
8
NC
C
Not connected
Phototransistor Collector
Phototransistor Emitter
Not connected
E
NC
GND
COMP
FB
Ground
Error Amplifier Compensation. This pin is the output of the error amplifier.*
Voltage Feedback. This pin is the inverting input to the error amplifier
Anode LED. This pin is the input to the light emitting diode.
LED
*The compensation network must be attached between pins 6 and 7.
Typical Application
FAN4803
PWM
Control
V1
VO
FOD2742
2
3
8
6
7
5
R1
R2
©2003 Fairchild Semiconductor Corporation
FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1
www.fairchildsemi.com
2
Absolute Maximum Ratings (T = 25°C unless otherwise specified)
A
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be
operable above the recommended operating conditions and stressing the parts to these levels is not recommended.
In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability.
The absolute maximum ratings are stress ratings only.
Symbol
Parameter
Value
Units
T
Storage Temperature
-40 to +125
-25 to +85
°C
°C
STG
T
Operating Temperature
Reflow Temperature Profile (refer to 15)
Input Voltage
OPR
V
37
20
70
7
V
LED
I
Input DC Current
mA
V
LED
V
V
Collector-Emitter Voltage
Emitter-Collector Voltage
Collector Current
CEO
V
ECO
I
50
145
85
145
mA
mW
mW
mW
C
(1)
PD1
PD2
PD3
Input Power Dissipation
(2)
Transistor Power Dissipation
(3)
Total Power Dissipation
Notes:
1. Derate linearly from 25°C at a rate of 2.42mW/°C
2. Derate linearly from 25°C at a rate of 1.42mW/°C.
3. Derate linearly from 25°C at a rate of 2.42mW/°C.
©2003 Fairchild Semiconductor Corporation
FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1
www.fairchildsemi.com
3
Electrical Characteristics (T = 25°C unless otherwise specified)
A
Input Characteristics
Symbol
Parameter
LED Forward Voltage
Reference Voltage
Test Conditions
Device Min. Typ. Max. Unit
V
I
I
= 10mA, V
= 10mA, V
= V (Fig. 1)
All
A
1.20
1.5
V
V
F
LED
COMP
COMP
FB
V
= V (Fig. 1)
2.482 2.495 2.508
2.470 2.495 2.520
2.450 2.500 2.550
REF
LED
FB
B
V
C
V
V
Deviation of V
Temperature
Over
T = -25°C to +85°C (Fig. 1)
All
3.5
17
mV
REF (DEV)
REF
A
∆V
Ratio of V
the Output of the Error
Amplifier
Variation to
I
= 10mA ∆V
= 10V to V
REF
All
-0.5
-0.3
-2.7
-2.0
mV/
V
RE
REF
LED
COMP
COMP
∆V
(Fig. 2)
COMP
∆V
= 36V to 10V
I
Feedback Input Current
I
= 10mA, R = 10KΩ (Fig. 3)
All
All
2.2
1.0
4
µA
µA
REF
LED
1
I
Deviation of I
Temperature
Over
T = -25°C to +85°C (Fig. 3)
1.2
REF (DEV)
REF
A
I
Minimum Drive Current
V
V
= V (Fig. 1)
All
All
0.45
0.01
1.0
1.0
mA
µA
LED (MIN)
COMP
FB
I
Off-state Error Amplifier
Current
= 37V, V = 0 (Fig. 4)
LED FB
(OFF)
|Z
|
Error Amplifier Output
Impedance (see note 2)
V
= V , I = 1mA to 20mA,
REF LED
All
0.15
0.5
Ω
OUT
COMP
f ≥ 1.0kHz
Notes:
1. The deviation parameters V
and I
are defined as the differences between the maximum and
REF(DEV)
REF(DEV)
minimum values obtained over the rated temperature range. The average full-range temperature coefficient of the
reference input voltage, ∆V , is defined as:
REF
{VREF(DEV)/VREF(TA = 25°C)} × 106
∆VREF (ppm/°C) = ----------------------------------------------------------------------------------------------------
∆TA
where ∆T is the rated operating free-air temperature range of the device.
A
2. The dynamic impedance is defined as |Z
| = ∆V
/∆I
. When the device is operating with two external
OUT
COMP LED
resistors (see Figure 2), the total dynamic impedance of the circuit is given by:
∆V R1
ZOUT, TOT = ------- ≈ ZOUT × 1 + -------
∆I
R2
©2003 Fairchild Semiconductor Corporation
FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1
www.fairchildsemi.com
4
Electrical Characteristics (T = 25°C unless otherwise specified) (Continued)
A
Output Characteristics
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
I
Collector Dark Current
V
= 10V (Fig. 5)
1
50
nA
V
CEO
CE
BV
Emitter-Collector Voltage
Breakdown
I = 100µA
7
10
ECO
E
BV
Collector-Emitter Voltage
Breakdown
I = 1.0mA
70
120
V
CEO
C
Transfer Characteristics
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
CTR
Current Transfer Ratio
I
= 10mA, V
= V ,
FB
100
140
200
%
LED
COMP
V
= 5V (Fig. 6)
CE
V
Collector-Emitter
Saturation Voltage
I
= 10mA, V
= V ,
FB
0.16
0.4
V
CE (SAT)
LED
COMP
I = 2.5mA (Fig. 6)
C
Isolation Characteristics
Symbol Parameter
Test Conditions
Min.
Typ.
Max.
Unit
I
Input-Output Insulation
Leakage Current
RH = 45%, T = 25°C, t = 5s,
1.0
µA
I-O
A
V
= 3000 VDC (Note 1)
I-O
V
Withstand Insulation Voltage RH ≤ 50%, T = 25°C,
2500
Vrms
ISO
A
t = 1 min. (Note 1)
12
R
Resistance (Input to Output)
V
= 500 VDC (Note 1)
10
Ω
I-O
I-O
Switching Characteristics
Symbol Parameter
Test Conditions
Min.
Typ.
Max.
Unit
B
Bandwidth
Fig. 7
= 0mA,
50
kHz
W
CMH
Common Mode Transient
Immunity at Output HIGH
I
V
= 10 V
PP
1.0
kV/µs
LED
cm
RL = 2.2kΩ (Fig. 8) (Note 2)
= 10mA, = 10 V
PP
CML
Common Mode Transient
Immunity at Output LOW
I
V
1.0
kV/µs
LED
cm
RL = 2.2kΩ (Fig. 8) (Note 2)
Notes:
1. Device is considered as a two terminal device: Pins 1, 2, 3 and 4 are shorted together and Pins 5, 6, 7 and 8 are
shorted together.
2. Common mode transient immunity at output high is the maximum tolerable (positive) dVcm/dt on the leading edge
of the common mode impulse signal, Vcm, to assure that the output will remain high. Common mode transient
immunity at output low is the maximum tolerable (negative) dVcm/dt on the trailing edge of the common pulse
signal,Vcm, to assure that the output will remain low.
©2003 Fairchild Semiconductor Corporation
FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1
www.fairchildsemi.com
5
Test Circuits
I(LED)
I(LED)
8
2
3
8
2
3
VF
6
7
R1
6
7
V
V
VCOMP
VREF
R2
VREF
5
5
Figure 1. VREF, VF, ILED (min) Test Circuit
Figure 2. ∆VREF/∆VCOMP Test Circuit
I(LED)
I(OFF)
8
2
3
8
2
IREF
6
6
3
V(LED)
7
7
V
V
R1
5
5
Figure 3. IREF Test Circuit
Figure 4. I(OFF) Test Circuit
I(LED)
ICEO
I(C)
8
8
2
2
3
VCE
VCE
6
7
6
3
7
V
VCOMP
VREF
5
5
Figure 5. ICEO Test Circuit
Figure 6. CTR, VCE(sat) Test Circuit
©2003 Fairchild Semiconductor Corporation
FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1
www.fairchildsemi.com
6
Test Circuits (Continued)
VCC = +5V DC
IF = 10 mA
47Ω
1
2
3
4
8
7
6
5
RL
1µf
VOUT
VIN
0.47V
0.1 VPP
Figure 7. Frequency Response Test Circuit
VCC = +5V DC
IF = 0 mA (A)
IF = 10 mA (B)
R1
2.2kΩ
1
8
7
6
5
VOUT
2
3
4
A B
VCM
_
+
10VP-P
Figure 8. CMH and CML Test Circuit
©2003 Fairchild Semiconductor Corporation
FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1
www.fairchildsemi.com
7
Typical Performance Curves
Fig. 9a LED Current vs. Cathode Voltage
Fig. 9b LED Current vs. Cathode Voltage
T = 25°C
A
1.0
0.5
15
T
V
= 25°C
A
= V
V
= V
COMP FB
COMP
FB
10
5
0
0.0
-5
-0.5
-1.0
-10
-15
-1
0
1
2
3
-1
0
1
2
3
V
– CATHODE VOLTAGE (V)
V
– CATHODE VOLTAGE (V)
COMP
COMP
Fig. 10 Reference Voltage vs. Ambient Temperature
= 10mA
Fig. 11 Reference Current vs Ambient Temperature
= 10mA
2.510
2.508
2.506
2.504
2.502
2.500
2.498
2.496
2.494
2.492
2.490
I
LED
R1 = 10kΩ
I
LED
3
2
-40
-20
0
20
40
60
80
100
-40
-20
0
20
40
60
80
100
T
– AMBIENT TEMPERATURE(°C)
T
– AMBIENT TEMPERATURE (°C)
A
A
Fig. 12 Off-State Current vs. Ambient Temperature
= 37V
Fig. 13 Forward Current vs. Forward Voltage
20
V
LED
100
15
10
5
25°C
0°C
10
70°C
1
-40
0.9
1.0
1.1
1.2
1.3
1.4
-20
0
20
40
60
80
100
V
– FORWARD VOLTAGE (V)
F
T
– AMBIENT TEMPERATURE (°C)
A
©2003 Fairchild Semiconductor Corporation
FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1
www.fairchildsemi.com
8
Typical Performance Curves (Continued)
Fig. 15 Collector Current vs. Ambient Temperature
= 5V
Fig. 14 Dark Current vs. Ambient Temperature
30
25
20
15
10
5
V
= 10V
CE
V
CE
1000
100
I
= 20mA
LED
I
= 10mA
= 5mA
LED
10
1
I
LED
I
= 1mA
LED
0
0.1
-40
-20
0
20
40
60
80
100
0
10
20
30
40
50
60
70
80
90
100
T
A
– AMBIENT TEMPERATURE (°C)
T
A
– AMBIENT TEMPERATURE (°C)
Fig. 16 Current Transfer Ratio vs. LED Current
= 5V
Fig. 17 Saturation Voltage vs. Ambient Temperature
0.26
0.24
0.22
0.20
0.18
0.16
0.14
0.12
0.10
160
140
120
100
80
I
I
= 10mA
V
LED
= 2.5mA
CE
C
0°C
25°C
70°C
60
40
-40
-20
0
20
40
60
80
100
1
10
– FORWARD CURRENT (mA)
100
I
T
– AMBIENT TEMPERATURE (°C)
LED
A
Fig. 19 Rate of Change Vref to Vout vs. Temperature
Fig. 18 Collector Current vs. Collector Voltage
= 25°C
35
30
25
20
15
10
5
-0.22
T
A
-0.24
-0.26
-0.28
-0.30
-0.32
-0.34
-0.36
I
= 20mA
LED
I
= 10mA
= 5mA
LED
-0.38
-0.40
I
LED
-0.42
-0.44
I
= 1mA
LED
7
0
-40
-20
0
20
40
60
80
100
0
1
2
3
4
5
6
8
9
10
V
– COLLECTOR-EMITTER VOLTAGE (V)
CE
TEMPERATURE (°C)
©2003 Fairchild Semiconductor Corporation
FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1
www.fairchildsemi.com
9
Typical Performance Curves (Continued)
Fig. 20 Voltage Gain vs. Frequency
5
V
= 10V
CC
= 10mA
I
F
0
RL = 100Ω
-5
RL = 500Ω
RL = 1kΩ
-10
-15
1
10
100
1000
FREQUENCY (kHz)
©2003 Fairchild Semiconductor Corporation
FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1
www.fairchildsemi.com
10
The FOD2742
Compensation
The FOD2742 is an optically isolated error amplifier. It
incorporates three of the most common elements neces-
sary to make an isolated power supply, a reference volt-
age, an error amplifier, and an optocoupler. It is
functionally equivalent to the popular KA431 shunt volt-
age regulator plus the CNY17F-X optocoupler.
The compensation pin of the FOD2742 provides the
opportunity for the designer to design the frequency
response of the converter. A compensation network may
be placed between the COMP pin and the FB pin. In
typical low-bandwidth systems, a 0.1µF capacitor may
be used. For converters with more stringent
requirements, a network should be designed based on
measurements of the system’s loop. An excellent
reference for this process may be found in “Practical
Design of Power Supplies” by Ron Lenk, IEEE Press,
1998.
Powering the Secondary Side
The LED pin in the FOD2742 powers the secondary
side, and in particular provides the current to run the
LED. The actual structure of the FOD2742 dictates the
minimum voltage that can be applied to the LED pin: The
error amplifier output has a minimum of the reference
voltage, and the LED is in series with that. Minimum volt-
age applied to the LED pin is thus 2.5V + 1.5V = 4.0V.
This voltage can be generated either directly from the
output of the converter, or else from a slaved secondary
winding. The secondary winding will not affect regula-
tion, as the input to the FB pin may still be taken from the
output winding.
Secondary Ground
The GND pin should be connected to the secondary
ground of the converter.
No Connect Pins
The NC pins have no internal connection. They should
not have any connection to the secondary side, as this
may
The LED pin needs to be fed through a current limiting
resistor. The value of the resistor sets the amount of cur-
rent through the LED, and thus must be carefully
selected in conjunction with the selection of the primary
side resistor.
compromise the isolation structure.
Photo-Transistor
The Photo-transistor is the output of the FOD2742. In a
normal configuration the collector will be attached to a
pull-up resistor and the emitter grounded. There is no
base connection necessary.
Feedback
Output voltage of a converter is determined by selecting
a resistor divider from the regulated output to the FB pin.
The FOD2742 attempts to regulate its FB pin to the
reference voltage, 2.5V. The ratio of the two resistors
should thus be:
The value of the pull-up resistor, and the current limiting
resistor feeding the LED, must be carefully selected to
account for voltage range accepted by the PWM IC, and
for the variation in current transfer ratio (CTR) of the
opto-isolator itself.
RTOP
------------------------- = -------------- – 1
RBOTTOM VREF
VOUT
Example: The voltage feeding the LED pins is +12V, the
voltage feeding the collector pull-up is +10V, and the
PWM IC is the Fairchild KA1H0680, which has a 5V
reference. If we select a 10KV resistor for the LED, the
maximum current the LED can see is:
The absolute value of the top resistor is set by the input
offset current of 5.2µA. To achieve 0.5% accuracy, the
resistance of R
should be:
TOP
(12V-4V) /10KΩ = 800µA.
V
OUT – 2.5
---------------------------- > 1040µA
The CTR of the opto-isolator is a minimum of 100%, so
the minimum collector current of the photo-transistor
when the diode is full on is also 800µA. The collector
resistor must thus be such that:
RTOP
10V – 5V
----------------------------------- < 800 µA or RCOLLECTOR > 6.25KΩ;
RCOLLECTOR
select 12KΩ to allow some margin.
©2003 Fairchild Semiconductor Corporation
FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1
www.fairchildsemi.com
11
Package Dimensions
8-pin SOIC Surface Mount
8
0.164 (4.16)
0.144 (3.66)
1
0.202 (5.13)
0.182 (4.63)
0.010 (0.25)
0.006 (0.16)
0.143 (3.63)
0.123 (3.13)
0.021 (0.53)
0.011 (0.28)
0.244 (6.19)
0.224 (5.69)
0.008 (0.20)
0.003 (0.08)
0.050 (1.27) Typ.
Lead Coplanarity: 0.004 (0.10) MAX
Recommended Pad Layout
0.024 (0.61)
0.060 (1.52)
0.275 (6.99)
0.155 (3.94)
0.050 (1.27)
Dimensions in inches (mm).
Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner
without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or
obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions,
specifically the warranty therein, which covers Fairchild products.
Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings:
http://www.fairchildsemi.com/packaging/
©2003 Fairchild Semiconductor Corporation
FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1
www.fairchildsemi.com
12
Ordering Information
Option
V
Order Entry Identifier
Description
V
VDE 0884
R2
R2
Tape and reel (2500 units per reel)
R2V
R2V
VDE 0884, Tape and reel (2500 units per reel)
Marking Information
1
2
2742A
6
V
X YY S
5
3
4
Definitions
1
2
3
Fairchild logo
Device number
VDE mark (Note: Only appears on parts ordered with VDE
option – See order entry table)
4
5
6
One digit year code, e.g., ‘3’
Two digit work week ranging from ‘01’ to ‘53’
Assembly package code
©2003 Fairchild Semiconductor Corporation
FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1
www.fairchildsemi.com
13
Carrier Tape Specifications
8.0 ± 0.10
2.0 ± 0.05
3.50 ± 0.20
Ø1.5 MIN
1.75 ± 0.10
0.30 MAX
4.0 ± 0.10
5.5 ± 0.05
12.0 ± 0.3
8.3 ± 0.10
5.20 ± 0.20
Ø1.5 ± 0.1
0.1 MAX
6.40 ± 0.20
User Direction of Feed
Dimensions in mm
©2003 Fairchild Semiconductor Corporation
FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1
www.fairchildsemi.com
14
Reflow Profile
Max. Ramp-up Rate = 3°C/S
Max. Ramp-down Rate = 6°C/S
T
P
260
240
220
200
180
160
140
120
100
80
t
P
T
L
Tsmax
t
L
Preheat Area
Tsmin
t
s
60
40
20
0
120
Time 25°C to Peak
240
360
Time (seconds)
Profile Freature
Pb-Free Assembly Profile
150°C
Temperature Min. (Tsmin)
Temperature Max. (Tsmax)
200°C
Time (t ) from (Tsmin to Tsmax)
60–120 seconds
3°C/second max.
217°C
S
Ramp-up Rate (t to t )
L
P
Liquidous Temperature (T )
L
Time (t ) Maintained Above (T )
60–150 seconds
260°C +0°C / –5°C
30 seconds
L
L
Peak Body Package Temperature
Time (t ) within 5°C of 260°C
P
Ramp-down Rate (T to T )
6°C/second max.
8 minutes max.
P
L
Time 25°C to Peak Temperature
©2003 Fairchild Semiconductor Corporation
FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1
www.fairchildsemi.com
15
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STEALTH™
SuperFET™
SuperSOT™-3
SuperSOT™-6
SuperSOT™-8
SupreMOS™
SyncFET™
Fairchild®
Fairchild Semiconductor®
FACT Quiet Series™
FACT®
UHC®
Ultra FRFET™
UniFET™
VCX™
VisualMax™
XS™
OPTOPLANAR®
FAST®
®
FastvCore™
FETBench™
PDP SPM™
Power-SPM™
Sync-Lock™
FlashWriter®
®
*
*
FPS™
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FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE
RELIABILITY, FUNCTION, OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR
CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. THESE
SPECIFICATIONS DO NOT EXPAND THE TERMS OF FAIRCHILD’S WORLDWIDE TERMS AND CONDITIONS, SPECIFICALLY THE WARRANTY THEREIN,
WHICH COVERS THESE PRODUCTS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE
EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION.
As used herein:
1. Life support devices or systems are devices or systems which, (a) are
intended for surgical implant into the body or (b) support or sustain life,
and (c) whose failure to perform when properly used in accordance
with instructions for use provided in the labeling, can be reasonably
expected to result in a significant injury of the user.
2. A critical component in any component of a life support, device, or
system whose failure to perform can be reasonably expected to
cause the failure of the life support device or system, or to affect its
safety or effectiveness.
ANTI-COUNTERFEITING POLICY
Fairchild Semiconductor Corporation's Anti-Counterfeiting Policy. Fairchild's Anti-Counterfeiting Policy is also stated on our external website, www.fairchildsemi.com,
under Sales Support.
Counterfeiting of semiconductor parts is a growing problem in the industry. All manufacturers of semiconductor products are experiencing counterfeiting of their parts.
Customers who inadvertently purchase counterfeit parts experience many problems such as loss of brand reputation, substandard performance, failed applications,
and increased cost of production and manufacturing delays. Fairchild is taking strong measures to protect ourselves and our customers from the proliferation of
counterfeit parts. Fairchild strongly encourages customers to purchase Fairchild parts either directly from Fairchild or from Authorized Fairchild Distributors who are
listed by country on our web page cited above. Products customers buy either from Fairchild directly or from Authorized Fairchild Distributors are genuine parts, have
full traceability, meet Fairchild's quality standards for handling and storage and provide access to Fairchild's full range of up-to-date technical and product information.
Fairchild and our Authorized Distributors will stand behind all warranties and will appropriately address any warranty issues that may arise. Fairchild will not provide
any warranty coverage or other assistance for parts bought from Unauthorized Sources. Fairchild is committed to combat this global problem and encourage our
customers to do their part in stopping this practice by buying direct or from authorized distributors.
PRODUCT STATUS DEFINITIONS
Definition of Terms
Datasheet Identification Product Status
Definition
Datasheet contains the design specifications for product development. Specifications may change in
any manner without notice.
Advance Information
Preliminary
Formative / In Design
Datasheet contains preliminary data; supplementary data will be published at a later date. Fairchild
Semiconductor reserves the right to make changes at any time without notice to improve design.
First Production
Full Production
Not In Production
Datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes
at any time without notice to improve the design.
No Identification Needed
Obsolete
Datasheet contains specifications on a product that is discontinued by Fairchild Semiconductor.
The datasheet is for reference information only.
Rev. I40
©2003 Fairchild Semiconductor Corporation
FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1
www.fairchildsemi.com
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