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GENERAL PURPOSE 6-PIN PHOTOTRANSISTOR OPTOCOUPLERS
4N25 4N37 4N26 H11A1 4N27 H11A2 4N28 H11A3 4N35 H11A4
SCHEMATIC
1 6

4N36 H11A5

WHITE PACKAGE (-M SUFFIX)

6 1 6

2

5

3

NC

4

1 6 1
PIN 1. ANODE 2. CATHODE 3. NO CONNECTION 4. EMITTER 5. COLLECTOR 6. BASE

BLACK PACKAGE (NO -M SUFFIX)

6 1 6 1 6 1

DESCRIPTION
The general purpose optocouplers consist of a gallium arsenide infrared emitting diode driving a silicon phototransistor in a 6-pin dual in-line package.

FEATURES
· Also available in white package by specifying -M suffix, eg. 4N25-M · UL recognized (File # E90700) · VDE recognized (File # 94766) - Add option V for white package (e.g., 4N25V-M) - Add option 300 for black package (e.g., 4N25.300)

APPLICATIONS
· Power supply regulators · Digital logic inputs · Microprocessor inputs

© 2003 Fairchild Semiconductor Corporation

Page 1 of 15

5/7/03

GENERAL PURPOSE 6-PIN PHOTOTRANSISTOR OPTOCOUPLERS
4N25 4N37 4N26 H11A1 4N27 H11A2 4N28 H11A3 4N35 H11A4 4N36 H11A5

ABSOLUTE MAXIMUM RATINGS (TA = 25°C unless otherwise specified)
Parameter TOTAL DEVICE Storage Temperature Operating Temperature Wave solder temperature (see page 14 for reflow solder profiles) Total Device Power Dissipation @ TA = 25°C Derate above 25°C EMITTER DC/Average Forward Input Current Reverse Input Voltage Forward Current - Peak (300µs, 2% Duty Cycle) LED Power Dissipation @ TA = 25°C Derate above 25°C DETECTOR Collector-Emitter Voltage Collector-Base Voltage Emitter-Collector Voltage Detector Power Dissipation @ TA = 25°C Derate above 25°C VCEO VCBO VECO PD 30 70 7 150 2.0 (non-M), 1.76 (-M) V V V mW mW/°C IF VR IF(pk) PD 100 (non-M), 60 (-M) 6 3 150 (non-M), 120 (-M) 2.0 (non-M), 1.41 (-M) mA V A mW mW/°C TSTG TOPR TSOL PD -55 to +150 -55 to +100 260 for 10 sec 250 3.3 (non-M), 2.94 (-M) °C °C °C mW Symbol Value Units

© 2003 Fairchild Semiconductor Corporation

Page 2 of 15

5/7/03

GENERAL PURPOSE 6-PIN PHOTOTRANSISTOR OPTOCOUPLERS
4N25 4N37 4N26 H11A1 4N27 H11A2 4N28 H11A3 4N35 H11A4 4N36 H11A5

ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise specified) INDIVIDUAL COMPONENT CHARACTERISTICS
Parameter EMITTER Input Forward Voltage Reverse Leakage Current DETECTOR Collector-Emitter Breakdown Voltage Collector-Base Breakdown Voltage Emitter-Collector Breakdown Voltage Collector-Emitter Dark Current Collector-Base Dark Current Capacitance (IC = 1.0 mA, IF = 0) (IC = 100 µA, IF = 0) (IE = 100 µA, IF = 0) (VCE = 10 V, IF = 0) (VCB = 10 V) (VCE = 0 V, f = 1 MHz) BVCEO BVCBO BVECO ICEO ICBO CCE 8 30 70 7 100 120 10 1 50 20 V V V nA nA pF (IF = 10 mA) (VR = 6.0 V) VF IR 1.18 0.001 1.50 10 V µA Test Conditions Symbol Min Typ* Max Unit

ISOLATION CHARACTERISTICS
Characteristic Input-Output Isolation Voltage Isolation Resistance Isolation Capacitance Test Conditions Symbol (Non `-M', Black Package) (f = 60 Hz, t = 1 min) (`-M', White Package) (f = 60 Hz, t = 1 sec) (VI-O = 500 VDC) (VI-O = &, f = 1 MHz) (`-M' White Package) VISO RISO CISO Min 5300 7500 1011 0.5 0.2 2 Typ* Max Units Vac(rms) Vac(pk) pF pF

Note * Typical values at TA = 25°C

© 2003 Fairchild Semiconductor Corporation

Page 3 of 15

5/7/03

GENERAL PURPOSE 6-PIN PHOTOTRANSISTOR OPTOCOUPLERS
4N25 4N37 4N26 H11A1 4N27 H11A2 4N28 H11A3 4N35 H11A4 4N36 H11A5

TRANSFER CHARACTERISTICS (TA = 25°C Unless otherwise specified.)
DC Characteristic Test Conditions Symbol Device 4N35 4N36 4N37 H11A1 H11A5 (IF = 10 mA, VCE = 10 V) 4N25 4N26 H11A2 H11A3 4N27 4N28 H11A4 (IF = 10 mA, VCE = 10 V, TA = -55°C) 4N35 4N36 4N37 4N35 4N36 4N37 4N25 4N26 4N27 4N28 VCE (SAT) (IC = 0.5 mA, IF = 10 mA) 4N35 4N36 4N37 H11A1 H11A2 H11A3 H11A4 H11A5 4N25 4N26 4N27 4N28 H11A1 H11A2 H11A3 H11A4 H11A5 4N35 4N36 4N37 Min 100 50 30 Typ* Max Unit

20 % 10

Current Transfer Ratio, Collector to Emitter

CTR

40

(IF = 10 mA, VCE = 10 V, TA = +100°C)

40

(IC = 2 mA, IF = 50 mA)

0.5

Collector-Emitter Saturation Voltage

0.3

V

0.4

AC Characteristic

Non-Saturated Turn-on Time

(IF = 10 mA, VCC = 10 V, RL = 100) (Fig.20)

TON

2

µs

Non Saturated Turn-on Time

(IC = 2 mA, VCC = 10 V, RL = 100) (Fig.20)

TON

2

10

µs

© 2003 Fairchild Semiconductor Corporation

Page 4 of 15

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GENERAL PURPOSE 6-PIN PHOTOTRANSISTOR OPTOCOUPLERS
4N25 4N37 4N26 H11A1 4N27 H11A2 4N28 H11A3 4N35 H11A4 4N36 H11A5

TRANSFER CHARACTERISTICS (TA = 25°C Unless otherwise specified.) (Continued)
AC Characteristic Test Conditions Symbol Device 4N25 4N26 4N27 4N28 H11A1 H11A2 H11A3 H11A4 H11A5 4N35 4N36 4N37 Min Typ* Max Unit

(IF = 10 mA, VCC = 10 V, RL = 100) (Fig.20) Turn-off Time TOFF

2 µs

(IC = 2 mA, VCC = 10 V, RL = 100) (Fig.20) * Typical values at TA = 25°C

2

10

© 2003 Fairchild Semiconductor Corporation

Page 5 of 15

5/7/03

GENERAL PURPOSE 6-PIN PHOTOTRANSISTOR OPTOCOUPLERS
4N25 4N37 4N26 H11A1 4N27 H11A2 4N28 H11A3 4N35 H11A4 4N36 H11A5

TYPICAL PERFORMANCE CURVES
Fig. 1 LED Forward Voltage vs. Forward Current (Black Package)
1.8 1.8

Fig. 2 LED Forward Voltage vs. Forward Current (White Package)

1.7

1.7

VF - FORWARD VOLTAGE (V)

1.6

VF - FORWARD VOLTAGE (V)

1.6

1.5

1.5

1.4 TA = -55°C 1.3 TA = 25°C

1.4 TA = -55°C 1.3 TA = 25°C 1.2 TA = 100°C

1.2

1.1

TA = 100°C

1.1

1.0 1 10 100

1.0 1 10 100

IF - LED FORWARD CURRENT (mA)

IF - LED FORWARD CURRENT (mA)

Fig.3 Normalized CTR vs. Forward Current (Black Package)
1.4 VCE = 5.0V TA = 25°C 1.2 Normalized to IF = 10 mA 1.6

Fig.4 Normalized CTR vs. Forward Current (White Package)
VCE = 5.0V TA = 25°C Normalized to IF = 10 mA

1.4

1.2 1.0

NORMALIZED CTR

NORMALIZED CTR
0 5 10 15 20

1.0

0.8

0.8

0.6

0.6

0.4

0.4 0.2

0.2

0.0

0.0 0 2 4 6 8 10 12 14 16 18 20

IF - FORWARD CURRENT (mA)

IF - FORWARD CURRENT (mA)

Fig. 5 Normalized CTR vs. Ambient Temperature (Black Package)
1.6 1.4

Fig. 6 Normalized CTR vs. Ambient Temperature (White Package)

1.4

IF = 5 mA

1.2 IF = 5 mA

NORMALIZED CTR

1.2 IF = 10 mA 1.0

NORMALIZED CTR

1.0 IF = 10 mA 0.8

0.8

0.6

IF = 20 mA

0.6

Normalized to IF = 10 mA TA = 25°C

0.4 IF = 20 mA

Normalized to IF = 10 mA TA = 25°C

0.4 -75 -50 -25 0 25 50 75 100 125

0.2 -60 -40 -20 0 20 40 60 80 100

TA - AMBIENT TEMPERATURE (°C)

TA - AMBIENT TEMPERATURE (°C)

© 2003 Fairchild Semiconductor Corporation

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GENERAL PURPOSE 6-PIN PHOTOTRANSISTOR OPTOCOUPLERS
4N25 4N37 4N26 H11A1 4N27 H11A2 4N28 H11A3 4N35 H11A4 4N36 H11A5

Fig. 7 CTR vs. RBE (Unsaturated) (Black Package)
1.0 1.0

Fig. 8 CTR vs. RBE (Unsaturated) (White Package)
NORMALIZED CTR ( CTRRBE / CTRRBE(OPEN))
0.9 0.8 IF = 10 mA 0.7 IF = 5 mA 0.6 0.5 0.4 0.3 0.2 VCE= 5.0 V 0.1 0.0

NORMALIZED CTR ( CTRRBE / CTRRBE(OPEN))

0.9 0.8 IF = 20 mA 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 10 100 1000 IF = 5 mA IF = 10 mA VCE= 5.0 V

IF = 20 mA

10

100

1000

RBE- BASE RESISTANCE (k)

RBE- BASE RESISTANCE (k)

Fig. 9 CTR vs. RBE (Saturated) (Black Package)
1.0 1.0

Fig. 10 CTR vs. RBE (Saturated) (White Package)
NORMALIZED CTR ( CTRRBE / CTRRBE(OPEN))

NORMALIZED CTR ( CTRRBE / CTRRBE(OPEN))

0.9 VCE= 0.3 V 0.8 IF = 20 mA 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 10 100 1000 IF = 5 mA IF = 10 mA

0.9 VCE= 0.3 V 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 10 100 1000 IF = 5 mA IF = 10 mA IF = 20 mA

RBE- BASE RESISTANCE (k )

RBE- BASE RESISTANCE (k )

Fig. 11 Collector-Emitter Saturation Voltage vs Collector Current (Black Package)
VCE (SAT) - COLLECTOR-EMITTER SATURATION VOLTAGE (V)
100

Fig. 12 Collector-Emitter Saturation Voltage vs Collector Current (White Package)
VCE (SAT) - COLLECTOR-EMITTER SATURATION VOLTAGE (V)
100

TA = 25°C 10

10

1

1 IF = 2.5 mA 0.1

IF = 2.5 mA 0.1

0.01

IF = 10 mA IF = 5 mA

IF = 20 mA

0.01 IF = 5 mA IF = 10 mA

IF = 20 mA

TA = 25°C 0.1 1 10

0.001 0.01

0.001 0.01

0.1

1

10

IC - COLLECTOR CURRENT (mA)

IC - COLLECTOR CURRENT (mA)

© 2003 Fairchild Semiconductor Corporation

Page 7 of 15

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GENERAL PURPOSE 6-PIN PHOTOTRANSISTOR OPTOCOUPLERS
4N25 4N37 4N26 H11A1 4N27 H11A2 4N28 H11A3 4N35 H11A4 4N36 H11A5

Fig. 13 Switching Speed vs. Load Resistor (Black Package)
1000 IF = 10 mA VCC = 10 V TA = 25°C 1000

Fig. 14 Switching Speed vs. Load Resistor (White Package)

IF = 10 mA VCC = 10 V TA = 25°C

SWITCHING SPEED - (µs)

Toff 10 Tf Ton

SWITCHING SPEED - (µs)

100

100

10

Toff

Tf

Ton
1

1

Tr

Tr

0.1 0.1 1 10 100

0.1 0.1 1 10 100

R-LOAD RESISTOR (k)

R-LOAD RESISTOR (k)

Fig. 15 Normalized ton vs. RBE (Black Package)
5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 10 100 1000 10000 100000 VCC = 10 V IC = 2 mA RL = 100 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 10

Fig. 16 Normalized ton vs. RBE (White Package)

NORMALIZED ton - (ton(RBE) / ton(open))

NORMALIZED ton - (ton(RBE) / ton(open))

VCC = 10 V IC = 2 mA RL = 100

100

1000

10000

100000

RBE- BASE RESISTANCE (k )

RBE- BASE RESISTANCE (k )

Fig. 17 Normalized toff vs. RBE (Black Package)
1.4 1.3 1.4 1.3

Fig. 18 Normalized toff vs. RBE (White Package)

NORMALIZED toff - (toff(RBE) / toff(open))

NORMALIZED toff - (toff(RBE) / toff(open))

1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 10 100 1000 10000 100000 VCC = 10 V IC = 2 mA RL = 100

1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 10 100 1000 10000 100000 VCC = 10 V IC = 2 mA RL = 100

RBE- BASE RESISTANCE (k )

RBE- BASE RESISTANCE (k )

© 2003 Fairchild Semiconductor Corporation

Page 8 of 15

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GENERAL PURPOSE 6-PIN PHOTOTRANSISTOR OPTOCOUPLERS
4N25 4N37 4N26 H11A1 4N27 H11A2 4N28 H11A3 4N35 H11A4 4N36 H11A5

Fig. 19 Dark Current vs. Ambient Temperature
10000

ICEO - COLLECTOR -EMITTER DARK CURRENT (nA)

VCE = 10 V TA = 25°C 1000

100

10

1

0.1

0.01

0.001 0 20 40 60 80 100

TA - AMBIENT TEMPERATURE (°C)

TEST CIRCUIT
VCC = 10V

WAVE FORMS

INPUT PULSE

IF INPUT RBE

IC

RL
10% 90% tr ton Adjust IF to produce IC = 2 mA tf toff OUTPUT PULSE

OUTPUT

Figure 20. Switching Time Test Circuit and Waveforms

© 2003 Fairchild Semiconductor Corporation

Page 9 of 15

5/7/03

GENERAL PURPOSE 6-PIN PHOTOTRANSISTOR OPTOCOUPLERS
4N25 4N37 4N26 H11A1 4N27 H11A2 4N28 H11A3 4N35 H11A4 4N36 H11A5

Black Package (No -M Suffix) Package Dimensions (Through Hole)
PIN 1 ID.

Package Dimensions (Surface Mount)
0.350 (8.89) 0.330 (8.38)

0.270 (6.86) 0.240 (6.10)

3

2

1

PIN 1 ID.

0.270 (6.86) 0.240 (6.10)

SEATING PLANE

0.350 (8.89) 0.330 (8.38) 0.070 (1.78) 0.045 (1.14)

4

5

6

0.070 (1.78) 0.045 (1.14)

0.300 (7.62) TYP

0.200 (5.08) 0.115 (2.92)

0.200 (5.08) 0.165 (4.18) 0.020 (0.51) MIN 0.100 (2.54) TYP

0.016 (0.41) 0.008 (0.20)

0.154 (3.90) 0.100 (2.54)

0.020 (0.51) MIN 0.016 (0.40) 0.008 (0.20)

0.022 (0.56) 0.016 (0.41)

0.016 (0.40) MIN 0.315 (8.00) MIN 0.405 (10.30) MAX

0.022 (0.56) 0.016 (0.41) 0.100 (2.54) TYP

0° to 15°

0.300 (7.62) TYP

Lead Coplanarity : 0.004 (0.10) MAX

Package Dimensions (0.4" Lead Spacing)
PIN 1 ID

Recommended Pad Layout for Surface Mount Leadform

0.070 (1.78)
0.270 (6.86) 0.240 (6.10)

0.060 (1.52)

0.350 (8.89) 0.330 (8.38)

0.415 (10.54)
SEATING PLANE
0.070 (1.78) 0.045 (1.14)

0.100 (2.54) 0.295 (7.49) 0.030 (0.76)

0.200 (5.08) 0.135 (3.43)

0.154 (3.90) 0.100 (2.54)

0.004 (0.10) MIN

0.016 (0.40) 0.008 (0.20)

0.022 (0.56) 0.016 (0.41) 0.100 (2.54) TYP

0° to 15° 0.400 (10.16) TYP

NOTE All dimensions are in inches (millimeters)

© 2003 Fairchild Semiconductor Corporation

Page 10 of 15

5/7/03

GENERAL PURPOSE 6-PIN PHOTOTRANSISTOR OPTOCOUPLERS
4N25 4N37 4N26 H11A1 4N27 H11A2 4N28 H11A3 4N35 H11A4 4N36 H11A5

White Package (-M Suffix) Package Dimensions (Through Hole)
0.350 (8.89) 0.320 (8.13) Pin 1 ID

Package Dimensions (Surface Mount)
0.350 (8.89) 0.320 (8.13) PIN 1 ID

0.260 (6.60) 0.240 (6.10)

0.260 (6.60) 0.240 (6.10)

0.390 (9.90) 0.332 (8.43)

SEATING PLANE

SEATING PLANE

0.070 (1.77) 0.040 (1.02)

0.070 (1.77) 0.040 (1.02)
0.014 (0.36) 0.010 (0.25) 0.320 (8.13)

0.320 (8.13) 0.014 (0.36) 0.010 (0.25)

0.200 (5.08) 0.115 (2.93)

0.200 (5.08) 0.115 (2.93)

0.012 (0.30) 0.008 (0.20)

0.100 (2.54) 0.015 (0.38) 0.020 (0.50) 0.016 (0.41) 0.100 (2.54) 15° 0.012 (0.30)

0.025 (0.63) 0.020 (0.51) 0.020 (0.50) 0.016 (0.41)

0.100 [2.54] 0.035 (0.88) 0.006 (0.16)

Package Dimensions (0.4" Lead Spacing)
0.350 (8.89) 0.320 (8.13) PIN 1 ID

Recommended Pad Layout for Surface Mount Leadform

0.070 (1.78)
0.260 (6.60) 0.240 (6.10)

0.060 (1.52)

0.070 (1.77) 0.040 (1.02) SEATING PLANE

0.014 (0.36) 0.010 (0.25)

0.425 (10.79)

0.100 (2.54) 0.305 (7.75) 0.030 (0.76)

0.200 (5.08) 0.115 (2.93)

0.100 (2.54) 0.015 (0.38) 0.020 (0.50) 0.016 (0.41) 0.100 [2.54] 0.012 (0.30) 0.008 (0.21) 0.425 (10.80) 0.400 (10.16)

NOTE All dimensions are in inches (millimeters)

© 2003 Fairchild Semiconductor Corporation

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GENERAL PURPOSE 6-PIN PHOTOTRANSISTOR OPTOCOUPLERS
4N25 4N37 4N26 H11A1 4N27 H11A2 4N28 H11A3 4N35 H11A4 4N36 H11A5

ORDERING INFORMATION Order Entry Identifier
Black Package (No Suffix) .S .SD .W .300 .300W .3S .3SD White Package (-M Suffix) S SR2 T V TV SV SR2V Option Surface Mount Lead Bend Surface Mount; Tape and reel 0.4" Lead Spacing VDE 0884 VDE 0884, 0.4" Lead Spacing VDE 0884, Surface Mount VDE 0884, Surface Mount, Tape & Reel

MARKING INFORMATION

1

1

4N25 V XX YY K
3 4 5

2 6

4N25 V
3 4

2 6

X YY Q
5

Black Package, No Suffix Definitions
1 2 3 Fairchild logo Device number

White Package, -M Suffix

VDE mark (Note: Only appears on parts ordered with VDE option ­ See order entry table) One or two digit year code · Two digits for black package parts, e.g., `03' · One digit for white package parts, e.g., `3' Two digit work week ranging from `01' to `53' Assembly package code

4 5 6

*Note ­ Parts built in the white package (M suffix) that do not have the `V' option (see definition 3 above) that are marked with date code `325' or earlier are marked in the portrait format.

© 2003 Fairchild Semiconductor Corporation

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GENERAL PURPOSE 6-PIN PHOTOTRANSISTOR OPTOCOUPLERS
4N25 4N37 4N26 H11A1 4N27 H11A2 4N28 H11A3 4N35 H11A4 4N36 H11A5

QT Carrier Tape Specifications (Black Package, No Suffix)
12.0 ± 0.1 4.85 ± 0.20 0.30 ± 0.05 4.0 ± 0.1 4.0 ± 0.1 Ø1.55 ± 0.05 1.75 ± 0.10

7.5 ± 0.1 13.2 ± 0.2 9.55 ± 0.20 16.0 ± 0.3

0.1 MAX

10.30 ± 0.20

Ø1.6 ± 0.1

User Direction of Feed

QT Carrier Tape Specifications (White Package, -M Suffix)
12.0 ± 0.1 4.5 ± 0.20 2.0 ± 0.05 0.30 ± 0.05 4.0 ± 0.1 Ø1.5 MIN 1.75 ± 0.10

11.5 ± 1.0 21.0 ± 0.1 9.1 ± 0.20 24.0 ± 0.3

0.1 MAX

10.1 ± 0.20

Ø1.5 ± 0.1/-0

User Direction of Feed

© 2003 Fairchild Semiconductor Corporation

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GENERAL PURPOSE 6-PIN PHOTOTRANSISTOR OPTOCOUPLERS
4N25 4N37 4N26 H11A1 4N27 H11A2 4N28 H11A3 4N35 H11A4 4N36 H11A5

Reflow Profile (White Package, -M Suffix)

300 Temperature (°C) 250 200 150 100 50 0 0 0.5 1 1.5 2 2.5 245°C peak

230°C, 10­30 s

Time above 183°C, 120­180 sec Ramp up = 2­10°C/sec · Peak reflow temperature: 245°C (package surface temperature) · Time of temperature higher than 183°C for 120­180 seconds · One time soldering reflow is recommended 3.5 4 4.5

3

Time (Minute)

Reflow Profile (Black Package, No Suffix)

300 Temperature (°C) 250 200 150 100 50 0 0 0.5 1 1.5 2 2.5 3 225 C peak

215°C, 10­30 s

Time above 183°C, 60­150 sec

Ramp up = 3C/sec 3.5 4 4.5

· Peak reflow temperature: 225°C (package surface temperature) · Time of temperature higher than 183°C for 60­150 seconds · One time soldering reflow is recommended

Time (Minute)

© 2003 Fairchild Semiconductor Corporation

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5/7/03

GENERAL PURPOSE 6-PIN PHOTOTRANSISTOR OPTOCOUPLERS
4N25 4N37 4N26 H11A1 4N27 H11A2 4N28 H11A3 4N35 H11A4 4N36 H11A5

DISCLAIMER 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. 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 THE PRESIDENT 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.

© 2003 Fairchild Semiconductor Corporation

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