CAT811JEUS-T10 - ON Semiconductor L.L.C.

Characteristics subject to change without notice 1Doc. No. 3005, Rev. R

FEATURES

■Precision monitoring of

+5.0 V (± 5%, ± 10%, ± 20%),

+3.3 V (± 5%, ± 10%),

+3.0 V (± 10%) and

+2.5 V (± 5%) power supplies

■Manual reset input

■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 VCC = 1.0 V

■ 6 µµ

µµ

µA power supply current

■ Power supply transient immunity

■ Available in SOT-143 packages with Sn or

NiPdAu Green Lead finishes.

■ Industrial temperature range: -40°°

°°

°C to +85°°

°°

°C

APPLICATIONS

■Computers

■Servers

■Laptops

■Cable modems

■ Wireless communications

■Embedded control systems

■White goods

■Power meters

■Intelligent instruments

■PDAs and handheld equipment

PIN CONFIGURATION

THRESHOLD SUFFIX SELECTOR

Nominal Threshold Threshold Suffix

Voltage Designation

4.63V L

4.38V M

4.00V J

3.08V T

2.93V S

2.63V R

2.32V Z

GND

RESET

VCC

CAT811

CAT812

CAT811, CAT812

4-Pin Microprocessor Power Supply Supervisors with Manual Reset

DESCRIPTION

The CAT811 and CAT812 are microprocessor

supervisory 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.

These devices generate a reset signal, which is asserted

while the power supply voltage is below a preset threshold

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

has risen above that level. The underlying floating gate

technology, AE2(TM) used by Catalyst Semiconductor,

makes it possible to offer any custom reset threshold

value. Seven industry standard threshold levels are

offered to support +5.0 V, +3.3 V, +3.0 V and +2.5 V

systems.

The CAT811 features a RESET push-pull output (active

LOW) and the CAT812 features a RESET push-pull

output (active HIGH).

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.

The CAT811/812 are fully specified over the industrial

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

a compact 4-pin SOT143 package.

CAT811, CAT812

Characteristics subject to change without notice

ORDERING INFORMATION

PIN DESCRIPTIONS

Pin Number

CAT811 CAT812

1 1 GND Ground

2—RESET Active LOW reset. RESET is asserted if VCC falls below the reset threshold

and remains low for at least 140ms after VCC rises above the reset threshold.

— 2 RESET Active HIGH reset. RESET is asserted if VCC falls below the reset

threshold and remains high for at least 140ms after VCC rises above

the reset threshold.

33MR 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.

44V

CC Power supply voltage that is monitored.

Name Description

TOP MARKING

Notes

1) The “YM” in the SOT-143 package marking indicates the Year

and Month of production.

2) All NiPdAu devices will be marked to indicate product type and

package. Threshold and full part numbers will be provided on box

and reel labels as well as all Shipping documents.

Prefix Device # Suffix

811 STBI GT10

Device Type

811: Push-Pull / Active Low Output

812: Push-Pull / Active High Output

CAT

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 Type

EUS: 4 pin SOT-143

TBI: 4 pin SOT-143 Green

Parts per Reel

T3: 3K units

T10: 10K units

GT3: 3K units (NiPdAu Lead Finish)*

GT10: 10K units (NiPdAu Lead Finish)*

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)2()1(

8TAC11L MYMAMYHD

EMYR

8TAC11M MYNAMYJD

J118TACAMYZMYKC

T118TACMYPAMYLD

S118TACMYQAMYMD

R118TACMYRAMYND

Z118TACAMYYMYPC

L218TACMYSADMYR

EMYS

M218TACMYTADMYT

J218TACMYUADMYU

T218TACMYVADMYV

S218TACMYWADMYW

R218TACMYXADMYX

Z218TACMYICMYYC

The device shown in the examples (CAT811STBI-

GT10) has an Active Low, Push-Pull output; a trip level

of 2.85V to 3.00V and is provided in the Green SOT-23

package with a NiPdAu lead finish on tape and reel

with 10,000 units.

* NiPdAu is a Lead Finish Option on the Green

Packages only. Unless indicated with the “G” green

packages are shipped with a Sn Matte Lead Finish.

CAT811, CAT812

3Doc No. 3005, Rev. R

Characteristics subject to change without notice

ELECTRICAL CHARACTERISTICS

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

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

Parameter Symbol Conditions Min Typ Max Units

VCC Range TA = 0°C to +70°C 1.0 5.5

TA = -40°C to +85°C 1.2 5.5

VCC < 5.5 V, J/L/M 8 20

VCC < 3.6 V, R/S/T/Z 6 15

TA = +25°C 4.56 4.63 4.70

TA = -40°C to +85°C 4.50 4.75

TA = +25°C 4.31 4.38 4.45

TA = -40°C to +85°C 4.25 4.50

TA = +25°C 3.93 4.00 4.06

TA = -40°C to +85°C 3.89 4.10

TA = +25°C 3.04 3.08 3.11

TA = -40°C to +85°C 3.00 3.15

TA = +25°C 2.89 2.93 2.96

TA = -40°C to +85°C 2.85 3.00

TA = +25°C 2.59 2.63 2.66

TA = -40°C to +85°C 2.55 2.70

TA = +25°C 2.28 2.32 2.35

TA = -40°C to +85°C 2.25 2.38

TA = -40˚C to +85˚C

Supply Current ICC

µA

L Threshold

M Threshold

J Threshold

T Threshold

S Threshold

R Threshold

Z Threshold

Reset

Threshold

Voltage VTH

ABSOLUTE MAXIMUM RATINGS*

Any pin with respect to ground .......... -0.3 V to +6.0 V

Input Current, VCC ............................................. 20 mA

Output Current, RESET, RESET ...................... 20 mA

Rate of Rise, VCC ............................................................. 100 V/µs

Continuous Power Dissipation

Derate 4mW/°C above 70°C (SOT143)........ 320 mW

Operating Temperature Range........... -40°C to +85°C

Storage Temperature Range............ -65°C to +105°C

Lead Soldering Temperature (10 sec).............. 300°C

*COMMENT

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.

CAT811, CAT812

Characteristics subject to change without notice

ELECTRICAL CHARACTERISTICS

VCC = Full range, TA = -40˚C to +85˚C unless otherwise noted. Typical values at TA = +25˚C and VCC = 5 V for

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

Parameter Symbol Conditions Min Typ(1) Max Units

Reset Threshold Tempco 30 ppm/˚C

VCC to Reset Delay (Note 2) VCC = VTH to (VTH - 100 mV) 20 µs

Reset Active Timeout Period TA = -40˚C to +85˚C 140 240 400 ms

VCC = VTH min, ISINK = 1.2 mA

CAT811R/S/T/Z

VCC = VTH min, ISINK = 3.2 mA

CAT811J/L/M

VCC > 1.0 V, ISINK = 50 µA 0.3

VCC = VTH max, ISOURCE = 500 µA

CAT811R/S/T/Z

VCC = VTH max, ISOURCE = 800 µA

CAT811J/L/M

VCC > VTH max, ISINK = 1.2 mA

CAT812R/S/T/Z

VCC > VTH max, ISINK = 3.2 mA

CAT812J/L/M

MR Minimum Pulse Width tMR 10 µs

MR Glitch Immunity Note 3 100 ns

MR to RESET Propagation

Delay tMD Note 2 0.5 µs

VIH VCC > VTH (MAX), CAT811/812L/M/J 2.3 V

VIL 0.8

VIH VCC > VIH (MAX), CAT811/812R/S/T/Z 0.7VCC

VIL 0.25VCC

MR Pull-up Resistance 10 20 30 kΩ

(continued)

Note 1: Production testing done at TA = +25˚C; limits over temperature guaranteed by design only.

Note 2: RESET output for the CAT811; RESET output for the CAT812

Note 3: Glitches of 100 ns or less typically will not generate a reset pulse.

VOL 0.4 V

VOH

RESET Output Voltage High

(Push-pull, active LOW,

CAT811)

VOL

RESET Output Voltage Low

(Push-pull, active HIGH,

CAT812) V

VOH 1.8 V < VCC ≤ VTH min, ISOURCE = 150 µA 0.8 VCC

0.8 VCC

VCC - 1.5

RESET Output Voltage Low

(Push-pull, active LOW,

CAT811)

0.4

RESET Output Voltage High

(Push-pull active HIGH,

CAT812)

0.3

MR Input Threshold

CAT811, CAT812

5Doc No. 3005, Rev. R

Characteristics subject to change without notice

TYPICAL OPERATING CHARACTERISTICS

VCC = Full range, TA = -40˚C to +85˚C unless otherwise noted. Typical values at TA = +25˚C and VCC = 5 V for

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

SUPPLY CURRENT VS. TEMPERATURE

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

0-50 0 50 100 150

SUPPLY CURRENT (µA)

TEMPERATURE (˚C)

POWER-DOWN RESET DELAY VS. TEMPERATURE

(CAT8xxR/S/T/Z)

POWER-DOWN RESET DELAY (µS)

TEMPERATURE (˚C)

POWER-UP RESET TIMEOUT

VS. TEMPERATURE

260

240

220

200

180

160

POWER-UP RESET TIMEOUT (mS)

TEMPERATURE (˚C)

NORMALIZED RESET THRESHOLD

VS. TEMPERATURE

1.0002

0.9998

0.9996

0.9994

0.9992

0.999

0.9988 0 20 40 60 80 100 120

NORMALIZED THRESHOLD

TEMPERATURE (˚C)

VCC=3.6V

VCC=5.5V

-50 0 50 100 150

VCC=5V

VCC=2.5V

-50 0 50 100 150

CAT811, CAT812

Characteristics subject to change without notice

DETAILED DESCRIPTIONS

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.

Figure 1. Reset Timing Diagram

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

TRANSIENT DURATION [µs)

RESET OVERDRIVE VTH - VCC [mV]

1 10 100 1000

TAMB = 25°C

CAT8xxM

CAT8xxZ

CAT811

CAT812

Threshold

Voltage

140ms

minimum

Reset T imeout Period

Power

Supply

Voltage

RESET

VCC TRANSIENT RESPONSE

The CAT811/812 protect µPs against brownout failure.

Short duration transients of 4µsec or less and 100 mV

amplitude typically do not cause a false RESET.

Figure 2 shows the maximum pulse duration of negative-

going VCC transients that do not cause a reset condition.

As the amplitude of the transient goes further below the

threshold (increasing VTH - VCC), the maximum pulse

duration decreases. In this test, the VCC starts from an

initial voltage of 0.5V above the threshold and drops

below it by the amplitude of the overdrive voltage (VTH

- VCC).

CAT811, CAT812

7Doc No. 3005, Rev. R

Characteristics subject to change without notice

VALID RESET WITH VCC UNDER 1.0 V

To ensure that the CAT811 RESET pin is in a known

state when VCC is under 1.0 V, a 100 kΩ 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 VCC is needed.

Figure 3. RESETRESET

RESETRESET

RESET Valid with VCC Under 1.0 V Figure 4. RESET Valid with VCC Under 1.1 V

Figure 5. Bi-directional Reset Pin Interfacing

CAT811

GND

VCC

100kΩ

Power

Supply

RESET

CAT812

GND

VCC

100kΩ

Power

Supply

RESET

CAT811

GND

VCC

4.7kΩ

Power

Supply

RESET

Buffered

RESET

BUF

Bi-directional

I/O Pin

RESET

INPUT

GND

µP

(For example: 68HC11)

BI-DIRECTIONAL RESET PIN INTERFACING

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

reset pins by connecting a 4.7 kΩ resistor in series with

the CAT811/812 reset output and the µP/µC bi-directional

reset pin.

CAT811, CAT812

Characteristics subject to change without notice

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

Dual Polarity Reset Outputs

Package 8-pin 8-pin 3-pin 3-pin 4-pin 4-pin

DIP and SOIC DIP and SOIC SOT23 and SOT23 and SOT143 SOT143

SC70 SC70

0.10 MAX

0.013 MIN

1.12 MAX

0.89 MIN

3.04 MAX

2.80 MIN

0.94 MAX

0.88 MIN

2.64 MAX

2.10 MIN

2.05 MAX

1.78 MIN

0.89 MAX

0.76 MIN

0.20 0.51 MAX

0.37 MIN

1.40 MAX

1.20 MIN

0.18 MAX

0.085 MIN

0.54 REF 0.41 MAX

0.21 MIN

0.20

GAUGE PLANE

PACKAGE INFORMATION

Plastic SOT143 (4-Pin)

Catalyst Semiconductor, Inc.

Corporate Headquarters

1250 Borregas Avenue

Sunnyvale, CA 94089

Phone: 408.542.1000

Fax: 408.542.1200

www.catalyst-semiconductor.com

Copyrights, Trademarks and Patents

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

DPP ™AE2 ™MiniPot™

Catalyst Semiconductor has been issued U.S. and foreign patents and has patent applications pending that protect its products. For a complete list of patents

issued to Catalyst Semiconductor contact the Company’s corporate office at 408.542.1000.

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.

REVISION HISTORY

Date Rev. Reason

10/22/03 L Updated Ordering Information

12/22/2003 M Updated Features

Replaced power-up reset timeout vs. temperature graph

with updated one

Replaced VCC Transient Response graph with updated

one

3/22/04 N General data sheet updates

3/25/2004 O Updated Electrical Characteristics (Reset Active

Timeout Period Max)

3/25/2004 P Corrected Pin Configure diagram

9/28/2004 Q Minor changes

12/28/2005 R Updated Features

Updated Ordering Information

Updated Yop Marking

Publication #: 3005

Revison: R

Issue date: 12/28/05