FM6328P3270X [FAIRCHILD]

Power Supply Support Circuit, Fixed, 1 Channel, PDSO3, SC70-3;


型号：	FM6328P3270X
厂家：	FAIRCHILD SEMICONDUCTOR
描述：	Power Supply Support Circuit, Fixed, 1 Channel, PDSO3, SC70-3 光电二极管
文件：	总6页 (文件大小：437K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

September 2003

FM6326/FM6327/FM6328

Ultra low current µC Supervisor Circuits

Features

General Description

■ Ultra Low supply Current (2µA)

FM6326/FM6327/FM6328 are a family of supervisory circuits

employed to monitor power supplies used in Microprocessor,

Microcontroller and other digital systems. These devices accu-

■ Voltage monitoring range: 1.8V to 3.6V

■ Reset threshold voltage options: From 1.6V to 3.4V

■ Power-on reset pulse width: 100ms (min)

■ Operating temperature range: - 40°C to + 85°C

rately monitor the system voltage (V ) and signal reset to the

system when the V

drops below a preset threshold voltage

(V ). The Reset signal is continuously asserted as long as V

■ Reset output options:

is below V . Once the V

rises above V , the Reset signal

CC TH

– Push-Pull active low (FM6326 series)

– Push-Pull active high (FM6327 series)

– Open-Drain active low (FM6328 series)

remains asserted for a minimum period of 100ms before it is

released. This minimum period ensures proper system reset

before any operation begins. The voltage monitoring circuit is

designed to ignore fast transients on V which prevents gener-

ation of spurious resets.

■ Power supply transient immunity

■ No External Components

The FM6326 family offers push-pull active low reset output, the

FM6327 family offers push-pull active high reset output and the

FM6328 family offers open-drain active low reset output. Each

of these three family of devices are availble with factory pro-

■ Package options: 3-Pin SOT23 and 3-Pin SC70

■ Compatible with FM809/FM810/FM803 series

Applications

grammed V values from 1.6V to 3.4V, in 100mV increments to

■ µC/µP Power supply monitoring (Computers/Controller

suit a wide variety of applications.

cards)

FM6326/FM6327/FM6328 feature ultra-low supply currents and

are available in tiny SOT23 and SC70 packages making them

ideal parts to use in battery operated portable equipments.

■ Portable appliances

■ Peripherals (Settop boxes/Hard Drives/Modems)

■ Instruments

■ Automotive Systems

Typical Operating Circuit

V_CC

FM6326

µC

RESET

Reset Input

GND

FM6326/6347/6348 Pinout (top view)

GND

V_CC

RESET

(RESET)

SOT23-3 & SC70-3 Packages

FM6326/FM6327/FM6328 Rev. C

www.fairchildsemi.com

Absolute Maximum Ratings

Voltage on any terminal relative to GND

ESD Rating:

– V

-0.3V to +6V

-0.3V to (VCC + 0.3V)

-0.3V to +6V

– Human Body Model

– Machine Model

2KV

200V

– RESET and RESET

– RESET (open drain)

Continuous Power Dissipation (T = +70°C)

Input Current (V

)

20mA

– 3-Pin SC70 (derate 2.7mW/°C above +70°C)

– 3-Pin SOT23 (derate 4mW/°C above +70°C)

174mW

320mW

Output Current (RESET and RESET)

Rate of Rise V

Operating Temperature Range

-40°C to +85°C

100V/µs

Storage Temperature Range

-65°C to +150°C

+300°C

Lead Temperature (soldering, 10s)

These are stress ratings only and functional operation is not implied for these levels or beyond. Exposure to Absolute Maximum

Rating conditions for extended periods may affect device reliability.

Electrical Characteristics

(V = full range; T = -40°C to + 85°C unless noted otherwise; Typical values are at + 25°C ; See Note 1.)

Parameter

Symbol

Conditions

Min

Typ

Max Units

Operating Voltage

Supply Current

Reset Threshold

T = 0°C to + 70°C

1.1

1.2

3.6

µA

T = - 40°C to + 85°C

= 3.0V (for V values < 2.93V); no load

3.5

= 3.3V (for V values ≥ 2.93V); no load

values from

T = 25°C

- 2%

+2%

1.6V to 3.4V in

100mV increments

T = - 40°C to + 85°C

- 5%

+ 5%

Reset Threshold Tempco

∆V /°C

ppm/°C

µs

to Reset Delay

= V to (V - 100mV)

Reset Active Timout Period

(See Note 2)

T = - 40°C to + 85°C

100

185

400

0.3

0.4

Output Voltage

(FM6326/FM6328)

= 1.6mA; V < (V

- 100mV);

SINK

TH Min

for V

> 1.8V

= 500mA; V < (V

SINK

TH Min

for V

< 1.8V

Output Voltage

(FM6326)

= 500mA; V > (V + 100mV);

0.8 * V

SOURCE

= 3.0V (for V values < 2.93V)

= 3.3V (for V values ≥ 2.93V)

Output Voltage

(FM6327)

= 1.6mA; V > (V + 100mV);

0.3

0.4

SINK

for V in the 1.8V to 3.3V range

= 3.2mA; V > (V + 100mV);

CC TH

SINK

> 3.3V

= 500µA; V < (V - 100mV);

0.8 * V

SOURCE

for V in the 1.8V to 3.3V range

Open-Drain Output Leakage

Current (FM6328)

> (V + 100mV)

0.1

µA

Note 1: Over temperature limits are guaranteed by design and not production tested.

Note 2: Consult factory for other Reset timout options

www.fairchildsemi.com

FM6326/FM6327/FM6328 Rev. C

Pin Descriptions

Pin Number

Deﬁnition

Description

GND

GROUND

RESET

RESET *

FM6326: Active low push-pull output.

FM6327: Active high push-pull output.

FM6328: Active low open-Drain output.

VCC

POWER

* RESET for FM6327; /RESET for FM6326/FM6328

Circuit Timing (example: FM6326)

V_CC

3.6V

V_TH

1.1V

GND

RESET O/P

3.6V

V_TH

1.1V

GND

T_RTmin

Operation

FM6326/FM6327/FM6328 supervisory devices are designed to

issue Reset signal during power on, brownout and power down

conditions.

Operation below minimum V

(Active Low Reset)

When V

is less than V

(min), the Reset signal is not

actively driven by the device and the voltage of the Reset signal

will be nearly same as V . Under this circumstance if the appli-

Typical power on and power down behaviour of FM6326 is illus-

trated in the “Circuit Timing” diagram above. During the power

cation requires that the Reset signal is close to GND level, it is

recommended to place a pull-down resistor (e.g. 100KΩ)

between Reset output and GND.

on when the V ramps up, the Reset output also ramps up till

about 1.1V (V

min) is reached. From this point onwards, as

the V ramps up, the reset output is actively driven low. Once

the V rises above the reset threshold voltage (V ), the reset

signal is driven low for Reset active timeout period (T ) and

then driven high. This timeout period ensures proper system ini-

tialization before any operation begins. During power down, as

soon as the V falls below the V , the Reset signal is driven

low to signal reset condition to the system.

www.fairchildsemi.com

FM6326/FM6327/FM6328 Rev. C

Ordering Information

Top

RESET

Packing

Method

Part Number

FM6326S3220X

FM6326S3232X

FM6326S3263X

FM6326S3270X

FM6326S3293X

FM6326S3308X

FM6326P3220X

FM6326P3232X

FM6326P3263X

FM6326P3270X

FM6326P3293X

FM6326P3308X

FM6327S3220X

FM6327S3232X

FM6327S3263X

FM6327S3270X

FM6327S3293X

FM6327S3308X

FM6327P3220X

FM6327P3232X

FM6327P3263X

FM6327P3270X

FM6327P3293X

FM6327P3308X

FM6328S3220X

FM6328S3232X

FM6328S3263X

FM6328S3270X

FM6328S3293X

FM6328S3308X

FM6328P3220X

FM6328P3232X

FM6328P3263X

FM6328P3270X

FM6328P3293X

FM6328P3308X

Marking Threshold (V)

Output Type

Package Type

A2C

A2D

A2G

A2H

A2J

2.20

2.32

2.63

2.70

2.93

3.08

2.20

2.32

2.63

2.70

2.93

3.08

2.20

2.32

2.63

2.70

2.93

3.08

2.20

2.32

2.63

2.70

2.93

3.08

2.20

2.32

2.63

2.70

2.93

3.08

2.20

2.32

2.63

2.70

2.93

3.08

Push-Pull, active low

3-Pin, SOT23

3000 units in T&R

A3B

A2C

A2D

A2G

A2H

A2J

Push-Pull, active low

3-Pin, SC70

3-Pin, SOT23

3-Pin, SC70

3-Pin, SOT23

3-Pin, SC70

A3B

B2C

B2D

B2G

B2H

B2J

Open-Drain,

active low

B3B

B2C

B2D

B2G

B2H

B2J

Open-Drain,

active low

B3B

C2C

C2D

C2G

C2H

C2J

C3B

C2C

C2D

C2G

C2H

C2J

C3B

Push-Pull, active high

Note: Other reset voltage and pulse width options are available on request. Please consult Fairchild sales for more details.

www.fairchildsemi.com

FM6326/FM6327/FM6328 Rev. C

Physical Dimensions inches (millimeters) unless otherwise noted

0.021

0.015

0.055

0.047

0.098

0.083

0.120

0.105

0.0059

0.0035

0.040

0.031

0-8û

0.010

0.005

0.079

0.071

0.004

0.001

SOT-23 Package Dimensions

FS Pkg Code AU

Dimensions in millimeters

PKG

C_L

0.76

0.95

LAND PATTERN RECOMMENDATION

www.fairchildsemi.com

FM6326/FM6327/FM6328 Rev. C

Physical Dimensions inches (millimeters) unless otherwise noted

.087 (2.2)

.071 (1.8)

.053 (1.35)

.045 (1.15)

.087 (2.2)

.079 (2.0)

.009 (.23)

.005 (.13)

.043 (1.1)

.032 (.80)

.004 (.10)

.010 (.25)

.004 (.10)

.016 (.40)

.012 (.30)

.026

(.65)

.018 (.45)

.006 (.15)

.052

(1.3)

SC70 Package Dimensions

Dimensions in millimeters

0.65

0.5

Land Pattern Recommendation

Life Support Policy

Fairchild's products are not authorized for use as critical components in life support devices or systems without the express written

approval of the President of Fairchild Semiconductor Corporation. As used herein:

1. Life support devices or systems are devices or systems which,

(a) are intended for surgical implant into the body, or (b) support

or sustain life, and whose failure to perform, when properly

used in accordance with instructions for use provided in the

labeling, can be reasonably expected to result in a signiﬁcant

injury to the user.

2. A critical component is any component of a life support

device or system whose failure to perform can be reasonably

expected to cause the failure of the life support device or

system, or to affect its safety or effectiveness.

Fairchild Semiconductor

Americas

Customer Response Center

Tel. 1-888-522-5372

Fairchild Semiconductor

Europe

Fairchild Semiconductor

Hong Kong

8/F, Room 808, Empire Centre

68 Mody Road, Tsimshatsui East

Kowloon. Hong Kong

Fairchild Semiconductor

Japan Ltd.

4F, Natsume Bldg.

2-18-6, Yushima, Bunkyo-ku

Tokyo, 113-0034 Japan

Tel: 81-3-3818-8840

Fax: 81-3-3818-8841

Fax: +44 (0) 1793-856858

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Tel: +49 (0) 8141-6102-0

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Tel: +39 (0) 2-249111-1

Tel; +852-2722-8338

Fax: +852-2722-8383

www.fairchildsemi.com

FM6326/FM6327/FM6328 Rev. C

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