EM6325DY-1.4 datasheet, PDF - EEWORLD Datasheet

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EM6325DY-1.4: DescriptionReset Circuit with Manual Reset; File Size227KB，8 Pages; ManufacturerETC

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Reset Circuit with Manual Reset

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EM MICROELECTRONIC

- MARIN SA

Reset Circuit with Manual Reset

Description

The EM6325 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

functionality of the system. When V

rises above V

, the

output remains active for an additional delay time. This

allows the system to stabilize before getting fully active.

This circuit features a Manual Reset: an input that asserts

reset when pulled low (

with internal pull-up).

Small SC70-4L, SC70-5L and SOT23-5L packages as well

as ultra-low supply current of 2.9μA make the EM6325 an

ideal choice for portable and battery-operated devices.

EM6325

Features

Manual reset function

200ms reset timeout period (1.6ms, 25ms, 1600ms on

request)

Ultra-low supply current of 2.9μA (V

=3.3V)

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

±1.5%

reset threshold accuracy

11 reset threshold voltages V

: 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

Immune to short negative V

transients

Guaranteed Reset valid down to 0.9V

Threshold hysteresis: 2.1% of V

Very small SOT23-5L, SC70-5L and SC70-4L

Typical Application

RESET

Applications

Computers

Servers and workstations

Modems

Wireless communication

Metering

Playstations

PDA , Webpad

Automotive systems

EM6325

RESET

GND

MPU, DSP

RESET

GND

EXT

for open-drain version only

Block Diagram

Oscillator

Pin Configuration

(top view)

RESET

push-pull / open-drain

Voltage

Reference

Reset

Logic

RESET

GND

RESET

(RESET)

GND

RESET

push-pull

GND

Filter

SOT23-5 / SC70-5

top view

SC70-4

top view

Pin Description

SOT23-5L / SC70-5L

SC70-4L

Name

Function

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

RESET

GND

RESET

then goes high after all reset conditions are deasserted or after

MR goes from low

to high

Ground

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

then goes low after all reset conditions are deasserted or after

goes from low to

high

Manual Reset input with an internal pull-up 15k

resistor. Reset remains active as

long as MR is low and for t

POR

after MR returns high. MR can be driven with a

CMOS output or shorted to ground with a switch

Supply Voltage (5.5V max.)

2005, EM Microelectronic-Marin SA

www.emmicroelectronic.com

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