CAT811TTBI-GT10 [CATALYST]

4-Pin Microprocessor Power Supply Supervisors with Manual Reset; 4引脚微处理器电源监控电路，带有手动复位


型号：	CAT811TTBI-GT10
厂家：	CATALYST SEMICONDUCTOR
描述：	4-Pin Microprocessor Power Supply Supervisors with Manual Reset 4引脚微处理器电源监控电路，带有手动复位电源电路电源管理电路微处理器光电二极管监控输入元件
文件：	总11页 (文件大小：222K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

CAT811, CAT812

4-Pin Microprocessor Power Supply Supervisors

with Manual Reset

FEATURES

DESCRIPTION

Precision monitoring of

+5.0 V (± 5%, ± 10%, ± 20%),

+3.3 V (± 5%, ± 10%),

The CAT811 and CAT812 are microprocessor supervi-

sory circuits that monitor power supplies. The CAT811

and CAT812 are direct replacements for the MAX811

and MAX812 in applications operating over the industrial

temperature range; both have a manual reset input.

+3.0 V (± 10%) and

+2.5 V (± 5%) power supplies

Manual reset input

These devices generate a reset signal, which is

asserted while the power supply voltage is below a

preset threshold level and for at least 140ms after the

power supply level has risen above that level. The

underlying floating gate technology, AE^2(TM)used by

Catalyst Semiconductor, makes it possible to offer any

custom reset threshold value. Seven industry

standard threshold levels are offered to support

+5.0V, +3.3V, +3.0V and +2.5V systems.

Offered in two output configurations:

CAT811: Active LOW reset

CAT812: Active HIGH reset

Direct replacements for the MAX811 and

MAX812 in applications operating over the

industrial temperature range

Reset valid down to V_CC= 1.0V

6µA power supply current

Power supply transient immunity

The CAT811 features a RESET push-pull output

(active LOW) and the CAT812 features a RESET

push-pull output (active HIGH).

Available in SOT-143 packages with Sn or

NiPdAu Green Lead finishes.

Industrial temperature range: -40ºC to +85ºC

Fast transients on the power supply are ignored and

the output is guaranteed to be in the correct state at

Vcc levels as low as 1.0 V.

APPLICATION

Computers, Servers, Laptops

Cable modems

The CAT811/812 are fully specified over the industrial

temperature range (-40°C to 85°C) and are available

in a compact 4-pin SOT-143 package.

Wireless communications

Embedded control systems

White goods

For Ordering Information details, see page 10.

Power meters

Intelligent instruments

PDAs and handheld equipment

THRESHOLD SUFFIX SELECTOR

DESCRIPTION

PIN CONFIGURATION

V_CC

GND

Nominal Threshold

Voltage

Threshold Suffix

Designation

CAT811

CAT812

4.63V

4.38V

4.00V

¯¯¯¯¯¯

RESET

¯¯¯

3.08V

2.93V

2.63V

2.32V

Characteristics subject to change without notice

Doc. No. MD-3005 Rev. S

CAT811, CAT812

PIN DESCRIPTION

Pin Number

Name

Description

CAT811 CAT812

GND

Ground

¯¯¯¯¯¯

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.

Active HIGH reset. RESET is asserted if V_CCfalls below the reset threshold

and remains high for at least 140ms after V_CCrises above the reset

threshold.

¯¯¯¯¯¯

RESET

—

RESET

¯¯¯

Manual Reset Input. A logic LOW on MR asserts RESET. RESET remains

¯¯¯

active as long as MR is LOW and for 140ms after MR returns HIGH. The

active low input has an internal 20kΩ pull-up resistor. The input should be

left open if not used.

¯¯¯

V_CC

Power supply voltage that is monitored.

BLOCK DIAGRAM

RESET

DIGITAL

DELAY

TOLERANCE

BIAS

–

RESET

VOLTAGE

REFERENCE

CAT811

GND

RESET

DIGITAL

DELAY

TOLERANCE

–

BIAS

RESET

VOLTAGE

REFERENCE

CAT812

GND

Doc. No. MD-3005 Rev. S

Characteristics subject to change without notice

CAT811, CAT812

Ratings Units

ABSOLUTE MAXIMUM RATINGS⁽¹⁾

Parameters

Any pin with respect to ground

Input Current, V_CC

-0.3 to + 6.0

V/µs

¯¯¯¯¯¯

Output Current RESET, RESET

Rate of Raise, V_CC

100

Continuous Power Dissipations

Derate 4mW/ºC above +70ºC (SOT-143)

Storage Temperature

320

-65 to +105

-40 to +85

+300

ºC

Operating Ambient Temperature

Lead Soldering (10 seconds)

ELECTRICAL OPERATING CHARACTERISTICS

V_CC= Full range, T_A= -40°C to +85°C unless otherwise noted. Typical values at T_A= +25°C and V_CC= 5V for the

L/M/J versions, V_CC= 3.3V for the T/S versions, V_CC= 3V for the R version and V_CC= 2.5V for the Z version.

Parameter

Symbol Conditions

T_A= 0°C to +70°C

Min

1.0

Typ

Max

5.5

Units

V_CCRange

T_A= -40°C to +85°C

1.2

5.5

V_CC< 5.5V, J/L/M

_CC< 3.6V, R/S/T/Z

Supply Current

I_CC

T_A= -40˚C to +85˚C

µA

T_A= +25°C

4.56

4.50

4.31

4.25

3.93

3.89

3.04

3.00

2.89

2.85

2.59

2.55

2.28

2.25

4.63

4.70

4.75

4.45

4.50

4.06

4.10

3.11

3.15

2.96

3.00

2.66

2.70

2.35

2.38

L Threshold

M Threshold

J Threshold

T Threshold

S Threshold

R Threshold

Z Threshold

T_A= -40°C to +85°C

T_A= +25°C

4.38

4.00

3.08

2.93

2.63

2.32

T_A= -40°C to +85°C

T_A= +25°C

T_A= -40°C to +85°C

T_A= +25°C

Reset

Threshold

Voltage

V_TH

T_A= -40°C to +85°C

T_A= +25°C

T_A= -40°C to +85°C

T_A= +25°C

T_A= -40°C to +85°C

T_A= +25°C

T_A= -40°C to +85°C

Notes:

(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.

Characteristics subject to change without notice

Doc. No. MD-3005 Rev. S

CAT811, CAT812

ELECTRICAL OPERATING CHARACTERISTICS (continued)

V_CC= Full range, T_A= -40°C to +85°C unless otherwise noted. Typical values at T_A= +25°C and V_CC= 5V for the

L/M/J versions, V_CC= 3.3V for the T/S versions, V_CC= 3V for the R version and V_CC= 2.5V for the Z version.

Parameter

Symbol Conditions

Min

Typ⁽¹⁾

Max

Units

Reset Threshold

Tempco

ppm/˚C

V_CCto Reset

Delay⁽²⁾

V_CC= V_THto (V_TH- 100mV)

µs

Reset Active

Timeout Period

T_A= -40˚C to +85˚C

140

240

400

0.3

V_CC= V_{TH min}, I_SINK= 1.2mA

CAT811R/S/T/Z

¯¯¯¯¯¯

RESET Output

Voltage Low

(Push-pull, active

LOW, CAT811)

V_OL

V_CC= V_{TH min}, I_SINK= 3.2mA

CAT811J/L/M

0.4

0.3

V_CC> 1.0V, I_SINK= 50µA

V_CC= V_{TH max}, I_SOURCE= 500µA

CAT811R/S/T/Z

¯¯¯¯¯¯

Voltage High

(Push-pull, active

LOW, CAT811)

RESET Output

0.8V_CC

V_OH

V_CC= V_{TH max}, I_SOURCE= 800µA

V_CC- 1.5

CAT811J/L/M

V_CC> V_{TH max}, I_SINK= 1.2mA

CAT812R/S/T/Z

RESET Output

Voltage Low

(Push-pull, active

HIGH, CAT812)

0.3

0.4

V_OL

V_CC> V_{TH max}, I_SINK= 3.2mA

CAT812J/L/M

RESET Output

Voltage High

(Push-pull active

HIGH, CAT812)

1.8 V < V_CC≤ V_{TH min}

V_OH

0.8V_CC

I_SOURCE= 150µA

¯¯¯

MR Minimum

t_MR

µs

Pulse Width

¯¯¯

MR Glitch

Note 3

Note 2

100

0.5

Immunity

¯¯¯

MR to RESET

t_MD

Propagation Delay

V_IH

V_IL

V_CC> V_{TH (MAX)}, CAT811/812L/M/J

2.3V

0.8

¯¯¯

MR Input

Threshold

V_IH

V_IL

V_CC> V_{IH (MAX)}, CAT811/812R/S/T/Z

0.7V_CC

0.25V_CC

¯¯¯

Resistance

MR Pull-up

kΩ

Notes:

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

¯¯¯¯¯¯

(2) RESET output for the CAT811; RESET output for the CAT812

(3) Glitches of 100ns or less typically will not generate a reset pulse

Doc. No. MD-3005 Rev. S

Characteristics subject to change without notice

CAT811, CAT812

TYPICAL OPERATING CHARACTERISTICS

V_CC= Full range, T_A= -40°C to +85°C unless otherwise noted. Typical values at T_A= +25°C and V_CC= 5V for the

L/M/J versions, V_CC= 3.3V for the T/S versions, V_CC= 3V for the R version and V_CC= 2.5V for the Z version.

POWER-UP RESET TIMEOUT

VS. TEMPERATURE

SUPPLY CURRENT VS. TEMPERATURE

(NO LOAD, CAT8xxR/S/T/Z)

260

240

220

200

180

160

ꢀ

=5.5V

ꢀ

=5V

=3.6V

=2.5V

-50

100

150

-50

100

150

TEMPERATURE (°C)

POWER-DOWN RESET DELAY VS. TEMPERATURE

(CAT8xxR/S/T/Z)

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. MD-3005 Rev. S

CAT811, CAT812

DETAILED DESCRIPTION

RESET TIMING

The reset signal is asserted LOW for the CAT811 and

HIGH for the CAT812 when the power supply voltage

falls 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

CAT811

CAT812

RESET

Figure 1. Reset Timing Diagram

V_CCTRANSIENT RESPONSE

The CAT811/812 protect µPs against brownout

failure. Short duration transients of 4µs 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).

Figure 2 shows the maximum pulse duration of

negative-going V_CCtransients that do not cause a

reset condition.

= 25°C

AMB

CAT8xxZ

ꢀ

CAT8xxM

100

1000

RESET OVERDRIVE V - V (mV)

TH CC

Figure 2. Maximum Transient Duration without Causing a

Reset Pulse vs. Reset Comparator Overdrive

Doc. No. MD-3005 Rev. S

Characteristics subject to change without notice

CAT811, CAT812

VALID RESET WITH V_CCUNDER 1.0V

¯¯¯¯¯¯

To ensure that the CAT811 RESET pin is in a known

state when V_CCis under 1.0V, a 100kΩ pull-down

¯¯¯¯¯¯

resistor between RESET pin and GND is

recommended; the value is not critical. For the

CAT812, a pull-up resistor from RESET pin to V_CCis

needed.

Power

Supply

Power

Supply

100kꢀ

CAT811

CAT812

MR RESET

GND

MR RESET

GND

100kꢀ

¯¯¯¯¯¯

Figure 4. RESET Valid with V_CCunder 1.1V

Figure 3. RESET Valid with V_CCunder 1.0V

BI-DIRECTIONAL RESET PIN INTERFACING

The CAT811/812 can interface with µP/µC bi-

directional reset pins by connecting a 4.7kΩ resistor in

series with the CAT811/812 reset output and the

µP/µC bi-directional reset pin.

BUF

Buffered

RESET

Power

Supply

(for example: 68HC11)

CAT811

µP

4.7kꢀ

MR RESET

RESET

INPUT

GND

CAT811

GND

Bi-directional I/O Pin

Figure 5. Bi-directional Reset Pin Interfacing

Characteristics subject to change without notice

Doc. No. MD-3005 Rev. S

CAT811, CAT812

OTHER SUPERVISORY PRODUCTS

Function

CAT1161/3 CAT1162

CAT809

CAT810

CAT811

CAT812

With 16k Bit Serial EEPROM

Memory

ꢀ

Watchdog Timer

ꢀ

Manual Reset Input

Active Low Reset

ꢀ

Active High Reset

ꢀ

8-pin DIP 3-pin SOT-23 3-pin SOT-23

ꢀ

Dual Polarity Reset Outputs

ꢀ

8-pin DIP

and SOIC

4-pin

Package

and SOIC

and SC70

SOT-143 SOT-143

Doc. No. MD-3005 Rev. S

Characteristics subject to change without notice

CAT811, CAT812

PACKAGE OUTLINE DRAWING

SOT-143 4-Lead (TB)⁽¹⁾

SYMBOL

MIN

NOM

MAX

1.22

0.15

1.07

0.50

0.89

0.20

3.04

2.64

1.40

0.80

0.05

0.75

0.30

0.76

0.08

2.80

2.10

1.20

0.90

2.90

1.30

1.92 BSC

0.20 BSC

0.50

0.40

0°

0.60

8°

0.54 REF

0.25

TOP VIEW

SIDE VIEW

END VIEW

For current Tape and Reel information, download the PDF file from:

http://www.catsemi.com/documents/tapeandreel.pdf.

Notes:

(1) All dimensions are in millimeters. Angles in degrees.

(2) Complies with JEDEC satndard TO-253.

Characteristics subject to change without notice

Doc. No. MD-3005 Rev. S

CAT811, CAT812

EXAMPLE OF ORDERING INFORMATION⁽¹⁾

Prefix

Device #

Suffix

CAT

811

-G

T10

Trip Level

L: 4.63V

M: 4.38V

J: 4.00V

T: 3.08V

S: 2.93V

R: 2.63V

Z: 2.32V

Company ID

Package

TB: SOT-143

Lead Finish

Blank: Matte-Tin

G: NiPdAu

Tape & Reel

T: Tape & Reel

3: 3,000/Reel

Product Number

811: Push-Pull/Active Low Output

812: Push-Pull/Active High Output

10: 10,000/Reel

Temperature Range

I = Industrial (-40ºC to 85ºC)

For Product Top Mark Codes, click here:

http://www.catsemi.com/techsupport/producttopmark.asp

Notes:

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

(2) The standard lead finish is NiPdAu. Contact factory for other package availability.

(3) This device used in the above example is a CAT811STBI-GT10 (SOT-143 4-Lead, Push-Pull/Active Low Output, trip level of 2.85V to

3.00V, NiPdAu, Tape & Reel, 10,000/Reel)

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

Doc. No. MD-3005 Rev. S

Characteristics subject to change without notice

REVISION HISTORY

Date

Rev. Reason

10/22/2003

Updated Ordering Information

Updated Features Replaced power-up reset timeout vs. temperature graph with updated

one Replaced V_CCTransient Response graph with updated one

12/22/2003

03/22/2004

03/25/2004

09/28/2004

12/28/2005

General data sheet updates

Updated Electrical Characteristics (Reset Active Timeout Period Max)

Corrected Pin Configure diagram

Minor changes

Updated Features Updated Ordering Information Updated Top Marking

Add “MD-“ to document number

Add Block Diagrams

Updated Package Outline Drawing

Update Example of Ordering Information

04/18/2008

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Adaptive Analog™, Beyond Memory™, DPP™, EZDim™, LDD™, MiniPot™, Quad-Mode™ and Quantum Charge Programmable™

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

RIGHTS OF THIRD PARTIES WITH RESPECT TO ANY PARTICULAR USE OR APPLICATION AND SPECIFICALLY DISCLAIMS ANY AND ALL LIABILITY 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: MD-3005

Revision:

Issue date:

04/18/08

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