EM6353 Datasheet, PDF(1/7 Page) EM Microelectronic - MARIN SA

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EM6353 Datasheet, PDF (1/7 Pages) EM Microelectronic - MARIN SA – Reset Circuit with Fixed Delay

EM MICROELECTRONIC - MARIN SA

EM6353

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 125Â°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

functionality of the system. When VDD rises above VTH, the

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 2.9ÂµA make the EM6353 an ideal choice

for portable and battery-operated devices.

Typical Application

VDD

RESET

VDD

RESET

EM6353

MPU, DSP

GND

* REXT for open-drain version only

GND

Pin Configuration (top view)

GND 1

RESET 2

(RESET)

3 VDD

SOT23-3L

"beta" bonding

RESET 1

(RESET)

3 GND

VDD 2

SOT23-3L

"alpha" bonding

NC 1

VDD 2

NC 3

5 RESET

(RESET)

4 GND

GND 4

RESET

(RESET)

SC70-5L

(compatible with SC70-3 by rotating 180Â°)

3 NC

2 VDD

1 NC

Features

! 200ms reset timeout period (25ms on request)

! Ultra-low supply current of 2.9ÂµA (VDD=3.3V)

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

! Â±1.5% reset threshold accuracy

! 11 reset threshold voltages VTH: 4.63V, 4.4V, 3.08V,

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

! 3 reset output options:

" Active-low RESET push-pull

" Active-low RESET open-drain

" Active-high RESET push-pull

! No external components

! Immune to short negative VDD transients

! Guaranteed Reset valid down to 0.8V

! Threshold hysteresis: 2.1% of VTH

! 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

VDD

GND

Voltage

Reference

Oscillator

Reset

Logic

RESET

Pin Description

SOT23-3L SOT23-3L

âbetaâ

âalphaâ

SC70-5L

1,3

Name

GND

RESET

VDD

N.C.

Function

Ground

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

after all reset conditions are deasserted and then goes high.

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

after all reset conditions are deasserted and then goes low.

Supply Voltage (5.5V max.)

Not connected. Not internally connected.

03/06 â rev.K

www.emmicroelectronic.com

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