CAT853TTBI-G [CATALYST]

3-Pin Microprocessor Power Supply Supervisors; 3引脚微处理器电源监控


型号：	CAT853TTBI-G
厂家：	CATALYST SEMICONDUCTOR
描述：	3-Pin Microprocessor Power Supply Supervisors 3引脚微处理器电源监控微处理器监控
文件：	总9页 (文件大小：537K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

CAT853, CAT863

CAT859, CAT869

3-Pin Microprocessor Power Supply

Supervisors

FEATURES

DESCRIPTION

■ Precision monitoring of +3.3V (-5%, -10%), 5V

The CAT853, CAT863, CAT859, and CAT869 are

supervisorycircuitsthatmonitorpowersuppliesindigital

systems.

(-10% Power Supplies)

■ Active low reset output

Thesedevicesgeneratearesetsignal,whichisasserted

whilethepowersupplyvoltageisbelowapresetthreshold

level and for at least 140 ms after the power supply level

has risen above that level. Industry standard threshold

levels are offered to support +3.3V or 5.0V systems.

■ Reset valid down to V_CC= 1.0V

■ 6μA power supply current

■ Power supply transient immunity

■ Industrial temperature range: -40ºC to +85ºC

■ RoHS-compliant SOT-23 package

The CAT859 and CAT869 feature a RESET push-pull

output (active low) for the two pinout options.

APPLICATIONS

■ Computers

The CAT853 and CAT863 feature an open drain RESET

output (active low). Both require a pull-up resistor on

the RESET output.

■ Servers

Fast transients on the power supply are ignored and

the output is guaranteed to be in the correct state at V_cc

levels as low as 1.0V.

■ Laptops

■ Cable modems

■ Wireless communications

■ Embedded control systems

■ White goods

■ Power meters

For Ordering Information details, see page 8.

■ Intelligent instruments

■ PDAs and handheld equipment

PIN CONFIGURATION

THRESHOLD SUFFIX SELECTOR

3-Lead SOT23

Nominal Threshold Threshold Sufﬁx

Voltage

3.08V

2.93V

4.38V

Designation

RESET

GND

RESET

CAT853

CAT859

CAT863

CAT869

GND

PIN DESCRIPTIONS

Name Description

RESET Active low reset. RESET is asserted if V_CCfalls below the reset threshold and remains low for at least

140ms after V_CCrises above the reset threshold.

GND

V_CC

Ground

Power supply voltage that is monitored.

Characteristics subject to change without notice

Doc. No. 3026, Rev. B

CAT853, CAT863, CAT859, CAT869

ABSOLUTE MAXIMUM RATINGS⁽¹⁾

Any pin with respect to ground

Input Current, V_CC

-0.3V to +6.0V

20mA

Output Current, RESET

Rate of Rise, V_CC

20mA

100V/μs

Continuous Power Dissipation

Derate 4mW/ºC above 70ºC (SOT23) 320 mW

Operating Temperature Range

Storage Temperature Range

Lead Soldering Temperature (10 sec)

Note:

-40ºC to +85ºC

-65ºC to +105ºC

300ºC

(1) Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only,

and functional operation of the device at these or any other conditions outside of those listed in the operational sections of this speciﬁcation

is not implied. Exposure to any absolute maximum rating for extended periods may affect device performance and reliability.

ELECTRICAL CHARACTERISTICS

V_CC= Full range, T_A= -40ºC to +85ºC unless otherwise noted. Typical values at T_A= +25ºC and V_CC= 3.3V for the

T/S versions, V_CC= 5V for the M version.

Parameter

Symbol Conditions

T_A= 0ºC to +70ºC

Min

1.0

1.2

Typ⁽¹⁾

Max

5.5

Units

V_CCRange

T_A= -40ºC to +85ºC

5.5

Supply Current

I_CC

T_A= -40ºC to +85ºC V_CC< 3.6V, S/T

μA

Reset

V_TH

T_A= +25ºC

T Threshold

3.04

3.00

2.89

2.85

4.31

4.25

3.08

3.11

3.15

2.96

3.00

4.45

4.50

Threshold

Voltage

T_A= -40ºC to +85ºC

T_A= +25ºC

S Threshold

2.93

4.38

T_A= -40ºC to +85ºC

T_A= +25ºC

M Threshold

T_A= -40ºC to +85ºC

Reset

ppm/ºC

Threshold

Tempco

V_CCto Reset

Delay

V_CC= V_THto (V_TH- 100 mV)

μs

Reset Active

Timeout Period

T_A= -40ºC to +85ºC

140

240

460

V_CC= V_THmin, I_SINK= 1.2mA

0.4

0.3

RESET Output

Voltage Low

V_OL

V_OH

_CC> 1.0V, I_SINK= 50μA

RESET Output

Voltage High

V_CC= V_THmax, I_SOURCE= -500μA

(for CAT859/869 only)

0.8 V_CC

Note:

(1) Production testing done at T_A= +25ºC; limits over temperature guaranteed by design only.

Doc. No. 3026, Rev. B

Characteristics subject to change without notice

CAT853, CAT863, CAT859, CAT869

TYPICAL OPERATING CHARACTERISTICS

V_CC= Full range, T_A= -40ºC to +85ºC unless otherwise noted. Typical values at T_A= +25ºC, V_CC=3.3V for T/S versions,

and V_CC= 5V for the M version.

POWER-UP RESET TIMEOUT

VS. TEMPERATURE

SUPPLY CURRENT VS. TEMPERATURE

(NO LOAD)

260

240

220

200

180

160

=5.5V

=5V

=3.6V

=2.5V

100

-50

150

-50

100

150

TEMPERATURE (°C)

POWER-DOWN RESET DELAY

VS. TEMPERATURE

NORMALIZED RESET THRESHOLD

VS. TEMPERATURE

1.0002

0.9998

0.9996

0.9994

0.9992

0.999

0.9988

-50

100

150

100 120

TEMPERATURE (°C)

Characteristics subject to change without notice

Doc No. 3026, Rev. B

CAT853, CAT863, CAT859, CAT869

DETAILED DESCRIPTIONS

RESET TIMING

TheresetsignalisassertedlowfortheCAT853,CAT863,

CAT859,andCAT869whenthepowersupplyvoltagefalls

below the threshold trip voltage and remains asserted

for at least 140ms after the power supply voltage has

risen above the threshold.

Threshold

Voltage

Power

Supply

Voltage

Reset Timeout Period

140ms

minimum

RESET

Figure 1. Reset Timing Diagram

V_CCTRANSIENT RESPONSE

The CAT853, CAT863, CAT859, and CAT869 protect

μPs against brownout failure. Short duration transients

of 4μsec or less and 100mV amplitude typically do not

cause a false RESET.

As the amplitude of the transient goes further below

the threshold (increasing V_TH- V_CC), the maximum

pulse duration decreases. In this test, the V_CCstarts

from an initial voltage of 0.5V above the threshold and

drops below it by the amplitude of the overdrive voltage

(V_TH- V_CC).

Figure2showsthemaximumpulsedurationofnegative-

going V_CCtransients that do not cause a reset condition.

Figure 2. Maximum Transient Duration Without Causing a Reset Pulse vs. Reset Comparator Overdrive

Doc. No. 3026, Rev. B

Characteristics subject to change without notice

CAT853, CAT863, CAT859, CAT869

VALID RESET WITH V_CCUNDER 1.0V

To ensure that the CAT859 and CAT869 RESET pin

is in a known state when V_CCis under 1.0V, a >10kΩ

pull-down resistor between RESET pin and GND is

recommended.

Power

Supply

CAT8x9

RESET

GND

Figure 3. RESET Valid with V_CCUnder 1.0V

BI-DIRECTIONAL RESET PIN INTERFACING

The CAT859 and CAT869 can interface with μP/μC

bi-directional reset pins by connecting a 4.7kꢀ resistor

in series with the CAT859 and CAT869 reset output and

the μP/μC bi-directional reset pin.

BUF

Buffered

RESET

Power

Supply

CAT8x9

RESET

GND

µP

(For example:

68HC11)

RESET

INPUT

GND

Bi-directional

I/O Pin

Figure 4. Bi-directional Reset Pin Interfacing

Characteristics subject to change without notice

Doc No. 3026, Rev. B

CAT853, CAT863, CAT859, CAT869

CAT853 AND CAT863 OPEN-DRAIN RESET

APPLICATION

The CAT853 and CAT863 features an open-drain

RESET output and therefore need a pull-up resistor on

the output for proper operation, as shown on Figure 5.

An advantage of the open-drain output includes the

ability to “wireAND” several outputs together to form an

inexpensive logic circuit. It is also possible to have the

pull-up resistor connected to a different supply which

can be higher than the CAT8x3 V_CCpin. The value of

the pull-up resistor is not critical in most applications,

typical values being between 5kꢀ and 10kꢀ.

Power

Supply

5kΩ

CAT8x3

µP

RESET

GND

RESET

INPUT

GND

Figure 5. Typical CAT8x3 Open-Drain Circuit Conﬁguration

Doc. No. 3026, Rev. B

Characteristics subject to change without notice

CAT853, CAT863, CAT859, CAT869

PACKAGE INFORMATION

Plastic SOT-23 (3-Pin)

Inches

Millimeters

Min

Max

Min

Max

Plastic SOT-23 (3-Pin)

0.0350

0.0005

0.0146

0.0033

0.1102

0.0472

0.0350

0.0701

0.0827

0º

0.0441

0.0039

0.0197

0.0071

0.1197

0.0551

0.0406

0.0807

0.1039

8º

0.89

0.013

0.37

0.085

2.80

1.20

0.89

1.78

2.10

0º

1.12

0.10

0.50

0.18

3.04

1.40

1.03

2.05

2.64

8º

For current Tape and Reel information,

download the PDF ﬁle from:

www.catsemi.com/documents/tapeandreel.pdf

0.0083

0.0160

0.0161

0.0270

0.275

0.41

0.685

Notes:

(1) This part is compliant with JEDEC speciﬁcation TO-236

(2) Die is face up for mold and trim/form

(3) Dimensions are exclusive of mold ﬂash and metal burr

Characteristics subject to change without notice

Doc No. 3026, Rev. B

CAT853, CAT863, CAT859, CAT869

EXAMPLE OF ORDERING INFORMATION ^{(1) (2) (3)}

Prefix

Device #

Suffix

CAT

859

TBI

–

T10

Company ID

Threshold Level

T: 3.08V

Lead Finish

G: NiPdAu (PPF)

Device Type

S: 2.93V

M: 4.38V

853: Open Drain / Active Low Output

863: Open Drain / Active Low Output

859: Push-Pull / Active Low Output

869: Push-Pull / Active Low Output

T: Tape & Reel

3: 3000/Reel

10: 10000/Reel

Package Type

TBI: SOT-23 Green⁽¹⁾

TOP MARKING

SOT-23 RoHS

Part and Threshold

CAT859T

NiPdAu Finish^{(4) (5)}

Part and Threshold

CAT853T

NiPdAu Finish^{(4) (5)}

CAT859S

RSYM

CAT853S

RUYM

CAT859M

CAT853M

CAT869T

CAT863T

CAT869S

RTYM

CAT863S

RVYM

CAT869M

CAT863M

ORDERING PART NUMBER

CAT859TTBI-G

CAT859STBI-G

CAT859MTBI-G⁽⁶⁾

CAT869TTBI-G

CAT869STBI-G

CAT869MTBI-G⁽⁶⁾

CAT853TTBI-G

CAT853STBI-G⁽⁶⁾

CAT853MTBI-G

CAT863TTBI-G

CAT863STBI-G⁽⁶⁾

CAT863MTBI-G

Notes:

(1) All packages are RoHS-compliant (Lead-free, Halogen-free).

(2) The device used in the example above is a CAT859STBI-GT10 (Push-Pull / Active Low Output, trip level of 2.85V to 3.00V NiPdAu, Tape

and Reel).

(3) For additional package and temperature options, please contact your nearest Catalyst Semiconductor Sales ofﬁce.

(4) The “YM” in the SOT-23 package marking indicates the Year and Month of production.

(5) All NiPdAu devices will be marked to indicate product type. Threshold and full part numbers will be provided on box and reel labels as well

as all Shipping documents.

(6) For special threshold and package categories, contact factory.

Doc. No. 3026, Rev. B

Characteristics subject to change without notice

REVISION HISTORY

Date

Rev. Reason

10/11/2006

Initial Issue CAT859, CAT869

Added CAT853, CAT863

Update Example of Ordering Information

Update Top Marking

05/04/2007

Update Ordering Part Number

Copyrights, Trademarks and Patents

Trademarks and registered trademarks of Catalyst Semiconductor include each of the following:

Beyond Memory™, DPP ™, EZDim™, LDD™, MiniPot™ and Quad Mode™

Catalyst Semiconductor has been issued U.S. and foreign patents and has patent applications pending that protect its products.

CATALYST SEMICONDUCTOR MAKES NO WARRANTY, REPRESENTATION OR GUARANTEE, EXPRESS OR IMPLIED, REGARDING THE SUITABILITY OF

ITS PRODUCTS FORANY PARTICULAR PURPOSE, NOR THAT THE USE OF ITS PRODUCTS WILL NOT INFRINGE ITS INTELLECTUAL PROPERTY RIGHTS

OR THE RIGHTS OFTHIRD PARTIES WITH RESPECT TOANYPARTICULAR USE ORAPPLICATIONAND SPECIFICALLYDISCLAIMSANYANDALLLIABILITY

ARISING OUT OF ANY SUCH USE OR APPLICATION, INCLUDING BUT NOT LIMITED TO, CONSEQUENTIAL OR INCIDENTAL DAMAGES.

Catalyst Semiconductor products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other

applications intended to support or sustain life, or for any other application in which the failure of the Catalyst Semiconductor product could create a situation where

personal injury or death may occur.

Catalyst Semiconductor reserves the right to make changes to or discontinue any product or service described herein without notice. Products with data sheets

labeled “Advance Information” or “Preliminary” and other products described herein may not be in production or offered for sale.

Catalyst Semiconductor advises customers to obtain the current version of the relevant product information before placing orders. Circuit diagrams illustrate typical

semiconductor applications and may not be complete.

Catalyst Semiconductor, Inc.

Corporate Headquarters

2975 Stender Way

Santa Clara, CA 95054

Phone: 408.542.1000

Fax: 408.542.1200

www.catsemi.com

Document No: 3026

Revision:

Issue date:

05/04/07

CAT853TTBI-G [CATALYST]

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