EM6353

Copyright

© 2006, EM Microelectronic-Marin SA

03/06 – rev.K

1

www.emmicroelectronic.com

Reset Circuit with Fixed Delay

Description

The EM6353 is an ultra-low current reset circuit available in a

large variety of configurations and very small packages for

maximum flexibility in all end-applications up to 125°C and

using power supplies between 1.5V and 5.5V.

This circuit monitors the supply voltage of any electronic

system, and generates the appropriate reset signal after a

fixed reset timeout period. The threshold defines the

minimum allowed voltage which guarantees the good

output remains active for an additional delay time. This

allows the system to stabilize before getting fully active.

The EM6353 features three output types: active-low push-

pull, active-low open-drain and active-high push-pull.

Small SC70-5L and SOT23-3L packages as well as ultra-low

supply current of 2.9µA make the EM6353 an ideal choice

for portable and battery-operated devices.

Typical Application

V

DD

GND

RESET

EM6353

V

DD

GND

RESET

MPU, DSP

V

DD

GND

*

SOT23-3L

"alpha" bonding

1

3

1

2

3

GND

V

DD

SOT23-3L

"beta" bonding

RESET

(RESET)

SC70-5L

(compatible with SC70-3 by rotating 180°)

1

5

V

DD

RESET

(RESET)

3

NC

1

2

3 GND

V

DD

RESET

(RESET)

4

2V

DD

RESET

(RESET)

5

GND

NC

NC

NC

4

2

GND

Features

!

200ms reset timeout period (25ms on request)

!

!

Operating temperature range: -40°C to +125°C

!

±1.5% reset threshold accuracy

!

2.93V, 2.63V, 2.2V, 1.8V, 1.66V, 1.57V, 1.38V, 1.31V

!

3 reset output options:

"

"

"

!

No external components

!

!

Guaranteed Reset valid down to 0.8V

!

!

Very small SOT23-3L and SC70-5L packages

Applications

!

Mobile phones

!

Set-top boxes

!

Video, digital cameras, DVD players and recorders

!

Modems

!

Personal computers

!

Switching hubs

!

Copiers and fax

!

Utility meters

!

Automotive systems

Block Diagram

RESET

V

DD

GND

+

-

Voltage

Reference

Reset

Logic

RESET

Oscillator

Pin Description

Pin

SOT23-3L

“beta”

SOT23-3L

“alpha”

SC70-5L

Name

Function

1

3

4

GND

Ground

RESET

Active-low RESET output. RESET remains low for the reset timeout period

after all reset conditions are deasserted and then goes high.

2

1

5

RESET

Active-high RESET output. RESET remains high for the reset timeout period

after all reset conditions are deasserted and then goes low.

3

2

2

Supply Voltage (5.5V max.)

-

-

1,3

N.C.

Not connected. Not internally connected.