ON Semiconductor NCP803 Technical data

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NCP803

Very Low Supply Current
3−Pin Microprocessor
Reset Monitor

The NCP803 is a cost-effective system supervisor circuit designed
to monitor VCC in digital systems and provide a reset signal to the host
processor when necessary. No external components are required.

The reset output is driven active within 10 µsec of V
through the reset voltage threshold. Reset is maintained active for a
minimum of 140 msec after VCC rises above the reset threshold. The
NCP803 has an open drain active-low RESET output. The output of
the NCP803 is guaranteed valid down to V

= 1.0 V and is available

CC

in a SOT-23 package.

The NCP803 is optimized to reject fast transient glitches on the V
line. Low supply current of 1.0 µA (V

= 3.2 V) make this device

CC

suitable for battery powered applications.

Features

• Precision V

Monitor for 2.5 V, 3.0 V, 3.3 V, and 5.0 V Supplies

CC

• Precision Monitoring Voltages from 1.6 V to 4.9 V Available

in 100 mV Steps

• 140 msec Guaranteed Minimum RESET Output Duration

• RESET Output Guaranteed to V

= 1.0 V

CC

• Low 1.0 µA Supply Current

• V

Transient Immunity

CC

• Small SOT-23 Package

• No External Components

• Wide Operating Temperature: -40°C to 105°C

T ypical Applications

• Computers

• Embedded Systems

• Battery Powered Equipment

• Critical µP Power Supply Monitoring

falling

CC

CC

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MARKING
DIAGRAM

3

SOT-23

(TO-236)

1

2

GND

RESET

NOTE: *SOT-23 is equivalent to JEDEC (TO-236)

ORDERING INFORMATION

Device Package Shipping

CASE 318

xxx = Specific Device Code
M = Monthly Date Code

PIN CONFIGURATION

1

2

SOT-23*

(Top View)

3

xxxM

1

3

2

V

CC

V

CC

V

CC

C = 100 nF

Figure 1. Typical Application Diagram

 Semiconductor Components Industries, LLC, 2003

May, 2003 - Rev. 4

NCP803

RESET RESET

GND GND

R

pull- up

NCP803SNxxxT1 SOT-23 3000/Tape & Reel

NOTE: The “xxx” denotes a suffix for Vcc voltage threshold

V

CC

µP

00

1 Publication Order Number:

options - see page 6 for more details.

DEVICE MARKING INFORMATION

See general marking information in the device marking
section on page 6 of this data sheet.

NCP803/D

NCP803

Á

Á

Á

PIN DESCRIPTION

Pin No. Symbol Description

1
2

ÁÁ

БББББ

3

ABSOLUTE MAXIMUM RATINGS* (Note 1)

Supply Voltage (VCC to GND) V
RESET -0.3 to (VCC + 0.3) V
Input Current, V
Output Current, RESET 20 mA
dV/dt (VCC) 100 V/µsec
Thermal Resistance, Junction to Air R
Operating Temperature Range T
Storage Temperature Range T
Lead Temperature (Soldering, 10 Seconds) T
Latch-up performance:

*Maximum Ratings are those values beyond which damage to the device may occur.

1. This device series contains ESD protection and exceeds the following tests:

Human Body Model 4000 V per MIL-STD-883, Method 3015.

Machine Model Method 400 V.

2. The maximum package power dissipation limit must not be exceeded.

P

D



CC

T

J(max)

GND

RESET

V

CC

 T

R

Ground
RESET output remains low while VCC is below the reset voltage threshold, and for 240 msec (typ.)

after V

ББББББББББББББББББББББ

rises above reset threshold.

CC

Supply Voltage: C = 100 nF is recommended as a bypass capacitor between VCC and GND.

Rating

Symbol Value Unit

CC

6.0 V

20 mA



JA

A
stg
sol

I

Latch- up

Negative

A

with T

J(max)

= 150°C

491 °C/W

-40 to +105 °C

-65 to +150 °C
+260 °C

150

mA

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2

NCP803

ELECTRICAL CHARACTERISTICS T

Characteristic

VCC Range

T

= 0°C to +70°C

A

= -40°C to +105°C

T

A

Supply Current

= 3.3 V

V

CC

= -40°C to +85°C

T

A

T

= 85°C to +105°C

A

= 5.5 V

V

CC

T

= -40°C to +85°C

A

= 85°C to +105°C

T

A

Reset Threshold (Note 4)

NCP803SN463

= +25°C

T

A

T

= -40°C to +85°C

A

= +85°C to +105°C

T

A

NCP803SN438

= +25°C

T

A

T

= -40°C to +85°C

A

= +85°C to +105°C

T

A

NCP803SN308

= +25°C

T

A

T

= -40°C to +85°C

A

= +85°C to +105°C

T

A

= -40°C to +105°C unless otherwise noted. Typical values are at TA = +25°C. (Note 3)

A

Symbol Min Typ Max Unit

1.0

1.2

I

CC

-

-

-

-

V

TH

4.56

4.51

4.39

4.31

4.27

4.16

3.04

3.00

2.92

-

-

0.5

-

0.8

-

4.63

-

-

4.38

-

-

3.08

-

-

5.5

5.5

1.2

2.0

1.8

2.5

4.70

4.75

4.87

4.45

4.49

4.60

3.11

3.15

3.23

V

µA

V

NCP803SN293

= +25°C

T

A

T

= -40°C to +85°C

A

= +85°C to +105°C

T

A

2.89

2.85

2.78

2.93

-

-

2.96

3.00

3.08

NCP803SN263

= +25°C

T

A

T

= -40°C to +85°C

A

= +85°C to +105°C

T

A

2.59

2.55

2.50

2.63

-

-

2.66

2.70

2.76

NCP803SN232

= +25°C

T

A

T

= -40°C to +85°C

A

= +85°C to +105°C

T

A

2.29

2.26

2.20

2.32

-

-

2.35

2.38

2.44

NCP803SN160

= +25°C

T

A

T

= -40°C to +85°C

A

= +85°C to +105°C

T

A

1.58

1.56

1.52

1.60

-

-

1.62

1.64

1.68
Reset Temperature Coefficient - 30 - ppm/°C
VCC to Reset Delay VCC = VTH to (VTH - 100 mV) - 10 - µsec
Reset Active Timeout Period 140 240 460 msec
RESET Output Voltage Low

V

= VTH - 0.2 V

CC

1.6 V  V

2.1 V  V

4.1 V  V

 2.0 V, I

TH

 4.0 V, I

TH

 4.9 V, I

TH

RESET Leakage Current

 VTH, RESET De-asserted

V

CC

SINK
SINK
SINK

= 0.5 mA
= 1.2 mA
= 3.2 mA

V

I

LEAK

OL

- - 0.3 V

- - 1 µA

3. Production testing done at TA = 25°C, over temperature limits guaranteed by design.

4. Contact your ON Semiconductor sales representative for other threshold voltage options.

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