EM6353

03/06 rev.K

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
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.
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

GND

RESET

EM6353

GND

RESET

MPU, DSP

GND

EXT

for open-drain version only

Pin Configuration

(top view)

SOT23-3L

"alpha" bonding

GND

SOT23-3L

"beta" bonding

RESET

(RESET)

SC70-5L

(compatible with SC70-3 by rotating 180°)

RESET

(RESET)

3 GND

RESET

(RESET)

2 V

RESET

(RESET)

GND

Features

200ms reset timeout period (25ms 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

No external components

Immune to short negative V

transients

Guaranteed Reset valid down to 0.8V

Threshold hysteresis: 2.1% of V

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

GND

Voltage

Reference

Reset

Logic

RESET

Oscillator

Pin Description

Pin

SOT23-3L

"beta"

SOT23-3L

"alpha"

SC70-5L

Name

Function

1 3

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

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 V

Supply Voltage (5.5V max.)

1,3

N.C.

Not connected. Not internally connected.

EM MICROELECTRONIC

- MARIN SA

EM6353

03/06 rev.K

www.emmicroelectronic.com

Ordering Information

EM6353

Delay (t

POR

RoHS Compliance:

B = 200ms

+ = lead-free/green mold compliant

A = 25ms

[blank] = leaded

Reset Output Type:

Reset Threshold Voltage (V

X = Active-low /RES push-pull

1.3 = 1.31V

2.6 = 2.63V

Y = Active-low /RES open-drain

1.4 = 1.38V

2.9 = 2.93V

Z = Active-high RES push-pull

1.6 = 1.57V

3.1 = 3.08V

1.7 = 1.66V

4.4 = 4.40V

Package & Bonding:

1.8 = 1.80V

4.6 = 4.63V

1SP3B = SOT23-3, "alpha", Tape&Reel 3kpcs

2.2 = 2.20V

2SP3B = SOT23-3, "beta", Tape&Reel 3kpcs
SC5B = SC70-5, Tape&Reel 3kpcs

B X

2.9 +

2SP3B

Note: Subject to availability (see standard versions list below). Please give complete Part Number when ordering. All

parts are offered in tape-and-reel only (3000 units).

Standard Versions (Top Marking)

Top marking is the standard from 2006. No bottom marking exists. Where ## refers to the lot number (EM internal

reference only)

Top marking with 4 characters is standard from 2003. For lead-free/green mold (RoHS) parts, the first letter of top

marking with 4 characters begins with letter "B" instead of letter "A". Bottom marking indicates the lot number.

Part Number

Top

Marking

Top Marking

with 4

Characters

EM6353BX1SP3B-1.3

ALBA

EM6353BX1SP3B-2.6

ALBG

EM6353BX1SP3B-2.6+

BLBG

EM6353BX1SP3B-2.9

ALBH

EM6353BX1SP3B-2.9+ C1## BLBH
EM6353BX1SP3B-4.4

ALBK

EM6353BX1SP3B-4.4+ C2## BLBK
EM6353BX1SP3B-4.6

ALBL

EM6353BX1SP3B-4.6+

BLBL

EM6353BX2SP3B-1.3

ALWA

EM6353BX2SP3B-1.8

ALWE

EM6353BX2SP3B-1.8+

BLWE

EM6353BX2SP3B-2.6 AW## ALWG
EM6353BX2SP3B-2.6+ BW## BLWG
EM6353BX2SP3B-2.9 AR## ALWH
EM6353BX2SP3B-2.9+ BR## BLWH
EM6353BX2SP3B-3.1 PC## ALWJ
EM6353BX2SP3B-3.1+ C5## BLWJ
EM6353BX2SP3B-4.4

ALWK

EM6353BX2SP3B-4.4+ C8## BLWK
EM6353BX2SP3B-4.6

ALWL

EM6353BX2SP3B-4.6+

BLWL

EM6353BXSC5B-1.3

ALWA

EM6353BXSC5B-1.8

ALWE

EM6353BXSC5B-2.6 AW## ALWG
EM6353BXSC5B-2.6+ BW## BLWG
EM6353BXSC5B-2.9 AR## ALWH
EM6353BXSC5B-3.1 PC## ALWJ

Part Number

Top

Marking

Top Marking

with 4

Characters

EM6353BXSC5B-3.1 C5## BLWJ
EM6353BXSC5B-4.6

ALWL

EM6353BY1SP3B-2.2

ALBS

EM6353BY1SP3B-2.6

ALBT

EM6353BY1SP3B-2.9 AS## ALBU
EM6353BY1SP3B-2.9+ BS## BLBU
EM6353BY1SP3B-3.1

ALBV

EM6353BY1SP3B-4.4

ALBW

EM6353BY1SP3B-4.6

ALBX

EM6353BY2SP3B-2.6

ALWT

EM6353BY2SP3B-2.6+ C9## BLWT
EM6353BY2SP3B-2.9

ALWU

EM6353BY2SP3B-2.9+ C7## BLWU
EM6353BY2SP3B-3.1

ALWV

EM6353BY2SP3B-3.1+

BLWV

EM6353BY2SP3B-4.4

ALWW

EM6353BY2SP3B-4.6

ALWX

EM6353BY2SP3B-4.6+

BLWX

EM6353BYSC5B-2.9

ALWU

EM6353BYSC5B-2.9+ C7## BLWU
EM6353BYSC5B-4.4

ALWW

EM6353BZ2SP3B-2.9 AV## ALW6
EM6353BZ2SP3B-2.9+ BV## BLW6
EM6353BZ2SP3B-3.1

ALW7

EM6353BZ2SP3B-3.1+

BLW7

EM6353BZ2SP3B-4.6

ALW9

EM6353BZ2SP3B-4.6+ CB## BLW9

EM6353

03/06 rev.K

www.emmicroelectronic.com

Standard Versions (samples)

Part Number

EM6353BX1SP3B-2.6+
EM6353BX1SP3B-2.9+
EM6353BX1SP3B-4.4+
EM6353BX1SP3B-4.6+
EM6353BX2SP3B-1.8+
EM6353BX2SP3B-2.6+
EM6353BX2SP3B-2.9+
EM6353BX2SP3B-3.1+
EM6353BX2SP3B-4.4+
EM6353BX2SP3B-4.6+

Part Number

EM6353BXSC5B-2.9
EM6353BXSC5B-3.1
EM6353BY1SP3B-2.9+
EM6353BY2SP3B-2.9+
EM6353BY2SP3B-3.1+
EM6353BY2SP3B-4.6+
EM6353BYSC5B-2.9+
EM6353BZ2SP3B-2.9+
EM6353BZ2SP3B-3.1+
EM6353BZ2SP3B-4.6

Sample stock is generally held on

standard versions only. Non standard versions have a 30,000 pieces minimum order

quantity. Please contact factory for other versions not shown here and for availability of non standard versions.

Absolute Maximum Ratings

Parameter Symbol

Conditions

Voltage at V

to GND

-0.3V to +6V

Minimum voltage at any signal pin

MIN

GND

0.3V

Maximum voltage at any signal pin

MAX

+ 0.3V

Electrostatic discharge max. to
MIL-STD-883C method 3015.7
with ref. to V

ESD

2000V

Max. soldering conditions

MAX

250°C

10s

Storage Temperature Range

STG

-65°C to +150°C

Stresses above these listed maximum ratings may cause
permanent damage to the device. Exposure beyond
specified operating conditions may affect device
reliability or cause malfunction.

Handling Procedures

This device has built-in protection against high static
voltages or electric fields; however, anti-static
precautions must be taken as for any other CMOS
component. Unless otherwise specified, proper operation
can only occur when all terminal voltages are kept within
the voltage range. Unused inputs must always be tied to
a defined logic voltage level.

Operating Conditions

Parameter Symbol

Min

Max

Unit

Supply voltage (note 1)

0.8 5.5

Operating Temperature

-40

+125 °C

Electrical Characteristics

Unless otherwise specified: V

= 0.8V to 5.5V, T

=-40°C to +125°C (note 1).

Parameter Symbol

Conditions

Min

Typ

Max

Unit

+25°C -

4.6

=1.5V

-40°C to +125°C

2.3

+25°C -

5.5

=3.3V

-40°C to +125°C

2.9

8.3

+25°C -

6.3

Supply current (note 2)

=5.0V

-40°C to +125°C

3.4

9.6

µA

+25°C 1.290

1.330

-40°C to +85°C

1.245

1.382

EM6353 1.3

-40°C to +125°C

1.221

1.31

1.387

+25°C 1.359

1.401

-40°C to +85°C

1.311

1.456

EM6353 1.4

-40°C to +125°C

1.286

1.38

1.461

+25°C 1.546

1.594

-40°C to +85°C

1.492

1.656

EM6353 1.6

-40°C to +125°C

1.463

1.57

1.663

+25°C 1.635

1.685

-40°C to +85°C

1.577

1.751

EM6353 1.7

-40°C to +125°C

1.547

1.66

1.758

+25°C 1.773

1.827

-40°C to +85°C

1.710

1.899

EM6353 1.8

-40°C to +125°C

1.678

1.80

1.906

+25°C 2.167

2.233

-40°C to +85°C

2.090

2.321

EM6353 2.2

-40°C to +125°C

2.050

2.20

2.330

+25°C 2.591

2.669

Threshold voltage
(note 3)

EM6353 2.6

-40°C to +85°C

2.499

2.63

2.775

EM6353

03/06 rev.K

www.emmicroelectronic.com

-40°C to +125°C

2.451

2.785

+25°C 2.886

2.974

-40°C to +85°C

2.784

3.091

EM6353 2.9

-40°C to +125°C

2.731

2.93

3.103

+25°C 3.034

3.126

-40°C to +85°C

2.926

3.249

EM6353 3.1

-40°C to +125°C

2.871

3.08

3.262

+25°C 4.334

4.466

-40°C to +85°C

4.180

4.642

EM6353 4.4

-40°C to +125°C

4.101

4.40

4.660

+25°C 4.561

4.699

-40°C to +85°C

4.399

4.885

EM6353 4.6

-40°C to +125°C

4.315

4.63

4.903

Threshold hysteresis

HYS

=+25°C -

2.1%

·V

- V

Note 1: Production tested at +25°C only. Over temperature limits are guaranteed by design, not production tested.

min=0.9V for active-high versions (EM6353_Z).

Note 3: Threshold voltage is specified for V

falling.

EM6353

03/06 rev.K

www.emmicroelectronic.com

Electrical Characteristics

(continued)

Unless otherwise specified: V

= 0.8V to 5.5V, T

=-40°C to +125°C (note 1).

Parameter Symbol Conditions Min

Typ

Max

Unit

EM6353B 155

200

224

Reset timeout period

POR

from 0V to V

TH (typ)

+15%

(note 2 and 4). T

= +25°C

EM6353A 19.4

25 28

Propagation delay time
V

RESET

(RESET) delay

drops from V

TH (typ)

+0.2V to V

TH (typ)

-0.2V

(note 2). T

= +25°C

2 130

255

µs

>1V

=100

µA

- - 0.3

>2.5V I

=1.5mA -

0.3

Open-drain RESET output
Voltage

>5V I

=3mA -

0.3

>1V

=100

µA

- - 0.3

>2.5V I

=1.5mA -

0.3

>5V I

=3mA -

0.35

>1V

=-30

µA

0.8 - -

>2.5V I

=-1.5mA 2

Push-pull RESET /

RESET

Output voltage

>5V

=-3mA 4

Output leakage current

LEAK

Only for EM6353_Y (open-drain)

0.5

µA

Note 1: Production tested at +25°C only. Over temperature limits are guaranteed by design, not production tested.

min=0.9V for active-high versions (EM6353_Z).

Note 2:

RESET

(RESET) open.

Note 4: Standard version is EM6353B (t

POR

=200ms), available at all times. EM6353A (t

POR

=25ms) is available by mask option and upon

minimum order quantity. Please contact EM sales.

Timing Waveforms

Note 6: t

SEN

= Maximum Transient Duration. Please refer to figure on next page.

Note 7: Overdrive = V

TH-

-V

. Please refer to figure on next page.

RESET

0.8V

logic "1"

logic "0"

SEN

logic "1"

logic "0"

RESET

POR

HYS

RESET

Overdrive

Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: EM6353BX1SP3B-1.3

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: EM6353BX1SP3B-1.3