Datasheet FM803T Datasheet (Fairchild Semiconductor)

1

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FM803 3-Pin

µ

C Supervisor Device

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FM803 Rev. C.3

FM803
3-Pin

µC Supervisor Device

General Description

The FM803 is a supervisory device designed to monitor power
supply or other system voltage. FM803 generates a reset pulse
whenever the voltage being monitored is out of tolerance. Once
asserted, the reset pulse is guaranteed to be valid for a minimum
of 140ms (256ms typical ). The reset output of FM803 is of active
low Open-Drain type and has an internal pull-up resistor.

Several threshold voltages are offered to accommodate 5.0V,

3.3V, 3.0V and 2.7V system voltages.

These devices are offered in space saving 3-pin SOT23 and SC70
packages.

Typical Operating Circuit

October 2002

Features

■ Automatic reset generation on power-up

■ Minimum 140 ms reset pulse

■ Internal 5kΩ pull-up resistor

■ Other reset pulse choices available: 32 - 256 ms

■ Operating temperature

-40°C to + 105°C (SOT-23)

-40°C to +85°C (SC70)

■ Choice of Reset Thresholds: 4.63V, 4.38V, 4.00V, 3.08V,

2.93V, 2.63V

■ SOT23-3 and SC70-3 Packages

© 2000 Fairchild Semiconductor International

Connection Diagram

GND

V

CC

/RESET

1

FM803

2

3

SC70-3 & SOT23-3 Packages

1

FM803

Controller

2

3

V

CC

GND

/RESET

2

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FM803 3-Pin

µ

C Supervisor Device

www.fairchildsemi.com

FM803 Rev. C.3

Absolute Maximum Ratings

Voltage on any terminal relative to GND

V

CC

-0.3V to +6.0V

/RESET -0.3V to +6.0V

Input Current 20mA

Output Current: /RESET 20mA

Rate of Rise of V

CC

100V/µs

Continuous Power Dissipation (T

A

= +70°C)

SOT23-3 (derate 4mW/°C above +70°C) 320mW

Operating Temperature Range -40°C to +105°C

Storage Temperature Range -65°C to +150°C

Lead Temperature (soldering, 10s) +300°C

These are stress ratings only, and functional operation is not implied for these levels or beyond. Exposure to Absolute Maximum Rating
conditions for extended periods may affect device reliability.

Electrical Characteristics SOT-23 Package (T

A

= 25°C unless otherwise noted)

VCC = full range, as noted under conditions. See Note 1.

Parameter Symbol Conditions Min Typ Max Units

(Note 2)

Operating Voltage V

CC

TA = -40°C to +105°C 1.1 5.5 V

Supply Current I

CC

TA = -40°C to +105°C, VCC < 5.5V 5 10 µA
FM803J/L/M
T

A

= -40°C to +105°C, VCC < 3.6V 3 6

FM803R/S/T

Reset Threshold V

TH

FM803L TA = -40°C to +105°C 4.40 4.63 4.86 V

FM803M TA = -40°C to +105°C 4.18 4.38 4.52

FM803J TA = -40°C to +105°C 3.90 4.00 4.18

FM803T TA = -40°C to +105°C 2.97 3.08 3.19

FM803S TA = -40°C to +105°C 2.79 2.93 3.00

FM803R TA = -40°C to +105°C 2.49 2.63 2.70

Reset Threshold Tempco 30 ppm/°C

VCC to Reset Delay VCC = VTH to (VTH - 100mV) 10 µs

Reset Active Timout Period TA = -40°C to +105°C 140 256 560 ms

FM803 Output Low V

OL

VCC = VTH(min), I

SINK

= 1.2mA, 0.3 V
FM803R/S/T
VCC = VTH(min), I

SINK

= 3.2mA, 0.4
FM803J/L/M
VCC = < 1.0V, I

SINK

= 50µA 0.3

Open-Drain Output Leakage VCC > VTH(max), I

RESET

= 1 0.8V

CC

1 µA

Current

Note 1: Testing in production is 25°C only. Limits over temperature are guaranteed by design.

Note 2: Typical values are at 25°C.

Note 3: Recommended minimum slew rate for the VCC rampup is 200mV/sec in the 0 to 2V range for the device to function properly.

3

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FM803 3-Pin

µ

C Supervisor Device

www.fairchildsemi.com

FM803 Rev. C.3

Absolute Maximum Ratings

Voltage on any terminal relative to GND

V

CC

-0.3V to +6.0V

/RESET -0.3V to (V

CC

+ 0.3V)

Input Current 20mA

Output Current: /RESET 20mA

Rate of Rise of V

CC

100V/µs

Continuous Power Dissipation (T

A

= +70°C)

SC70-3 174mW

Operating Temperature Range -40°C to +85°C

Storage Temperature Range -65°C to +150°C

Lead Temperature (soldering, 10s) +300°C

These are stress ratings only, and functional operation is not implied for these levels or beyond. Exposure to Absolute Maximum Rating
conditions for extended periods may affect device reliability.

Electrical Characteristics SC70 Package (T

A

= 25°C unless otherwise noted)

VCC = full range, as noted under conditions. See Note 1.

Parameter Symbol Conditions Min Typ Max Units

(Note 2)

Operating Voltage V

CC

TA = 0°C to +70°C 1.4 5.5 V
TA = -40°C to +85°C 1.6 5.5

Supply Current I

CC

TA = -40°C to +85°C, VCC < 5.5V 9 15 µA
FM803J/L/M
TA = -40°C to +85°C, VCC < 3.6V 6 10
FM803R/S/T

Reset Threshold V

TH

FM803L TA = -40°C to +85°C 4.40 4.63 4.86 V

FM803M TA = -40°C to +85°C 4.18 4.38 4.52

FM803J TA = -40°C to +85°C 3.90 4.00 4.18

FM803T TA = -40°C to +85°C 2.97 3.08 3.19

FM803S TA = -40°C to +85°C 2.79 2.93 3.00

FM803R TA = -40°C to +85°C 2.49 2.63 2.70

Reset Threshold Tempco 30 ppm/°C

VCC to Reset Delay (Note 2) VCC = VTH to (VTH - 100mV) 10 µs

Reset Active Timout Period TA = -40°C to +85°C 140 256 560 ms

FM803 Output Low V

OL

VCC = VTH(min), I

SINK

= 1.2mA, 0.35 V
FM803R/S/T
VCC = VTH(min), I

SINK

= 3.2mA, 0.4
FM803J/L/M
VCC = < 1.0V, I

SINK

= 50µA 0.3

Open-Drain Output Leakage VCC > VTH(max), /RESET = 1 7 µA
Current

Note 1: Testing in production is 25°C only. VCC = 5V for FM803L/M/J, VCC = 3.3V for FM803T/S and VCC = 3V for FM803R. Limits over temperature are guaranteed by design.

Note 2 Typical values are at 25°C.

4

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FM803 3-Pin

µ

C Supervisor Device

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FM803 Rev. C.3

Pin Descriptions

Pin Number Name Function

1 GND GROUND

2 /RESET /RESET remains LOW while VCC is below

VTH, and for at least 140ms after VCC rises
above VTH.

3V

CC

Circuit Timing (Ex: FM803)

When operating properly with 5V V

CC

(for example), /RESET will

also be about 5V. When V

CC

starts to fall, /RESET will follow it

down as shown. When V

CC

drops below VTH, /RESET drops to

ground (“issues a RESET”) and stays there unless V

CC

also falls
below its minimum operating voltage, approx. 1V. At this point, the
supervisor loses control, and its output may rise, only to again
follow V

CC

down to the ground.

When V

CC

begins to rise, /RESET follows it until 1.0V or so is
reached, whereupon the device regains control, /RESET is pulled
to ground, etc. When V

CC

rises above VTH, /RESET comes out of

RESET 140 ms later.

If it is required that a lower value than GND + 1.0V is needed on
RESET signal during VCC ≤ 1V, a 100K resistor may be used on
the device output to GND.

3.3V

V

TH

1V

GND

3.3V

V

TH

1V

GND

V

CC

RESET

140ms
(min)

5

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FM803 3-Pin

µ

C Supervisor Device

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FM803 Rev. C.3

Ordering Information

Part Top RESET Output Package Packing

Number Marking Threshold (V) Type Type Method

FM803LS3X 03L 4.63 Open-Drain, active LOW 3-Pin, SOT23 3000 units in T&R

FM803MS3X 03M 4.38 Open-Drain, active LOW 3-Pin, SOT23 3000 units in T&R

FM803JS3X 03J 4.00 Open-Drain, active LOW 3-Pin, SOT23 3000 units in T&R

FM803TS3X 03T 3.08 Open-Drain, active LOW 3-Pin, SOT23 3000 units in T&R

FM803SS3X 03S 2.93 Open-Drain, active LOW 3-Pin, SOT23 3000 units in T&R

FM803RS3X 03R 2.63 Open-Drain, active LOW 3-Pin, SOT23 3000 units in T&R

FM803LP3X QLY 4.63 Open-Drain, active LOW 3-Pin, SC70 3000 units in T&R

FM803MP3X QMY 4.38 Open-Drain, active LOW 3-Pin, SC70 3000 units in T&R

FM803JP3X QJY 4.00 Open-Drain, active LOW 3-Pin, SC70 3000 units in T&R

FM803TP3X QTY 3.08 Open-Drain, active LOW 3-Pin, SC70 3000 units in T&R

FM803SP3X QSY 2.93 Open-Drain, active LOW 3-Pin, SC70 3000 units in T&R

FM803RP3X QRY 2.63 Open-Drain, active LOW 3-Pin, SC70 3000 units in T&R

Note 4: Devices listed above feature 250ms typical Reset Pulse width. Consult Fairchild sales for other reset pulse width options.

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FM803 3-Pin

µ

C Supervisor Device

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FM803 Rev. C.3

Physical Dimensions inches (millimeters) unless otherwise noted

SOT-23 Package Dimensions

FS Pkg Code AU

0

.12

0

0.105

0.079

0.071

0.004

0.001

0.040

0.031

0.021

0.015

0.055

0.047

0.098

0.083

0.010

0.005

0.0059

0.0035

0-8

PK

G

C

L

0.76

0.76

0.95

2.29

LAND PATTERN RECOMMENDATION

7

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FM803 3-Pin

µ

C Supervisor Device

www.fairchildsemi.com

FM803 Rev. C.3

Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications.

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 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 to the user.

2. A critical component is 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.

Fairchild Semiconductor Fairchild Semiconductor Fairchild Semiconductor Fairchild Semiconductor
Americas Europe Hong Kong Japan Ltd.
Customer Response Center Fax: [phone]/F, Room 808, Empire Centre 4F, Natsume Bldg.

Tel. [phone] Deutsch Tel: [phone] Mody Road, Tsimshatsui East 2-18-6, Yushima, Bunkyo-ku

English Tel: [phone] Kowloon. Hong Kong Tokyo, 113-0034 Japan
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.004 (.10)

.026

(.65)

.052
(1.3)

.087 (2.2)
.071 (1.8)

.016 (.40)
.012 (.30)

.043 (1.1)
.032 (.80)

.018 (.45)
.006 (.15)

.010 (.25)
.004 (.10)

.009 (.23)
.005 (.13)

.087 (2.2)
.079 (2.0)

.053 (1.35)
.045 (1.15)

Land Pattern Recommendation

0.65

1.80

0.5

0.6

0.65

Physical Dimensions inches (millimeters) unless otherwise noted

SC70 Package Dimensions