CAT811JEUS-T Catalyst / ON Semiconductor, CAT811JEUS-T Datasheet

CAT811JEUS-T

Manufacturer Part Number

CAT811JEUS-T

Description

Supervisory Circuits 4V Push-Pull Low

Manufacturer

Catalyst / ON Semiconductor

Datasheet

1.CAT811STBI-GT3.pdf (11 pages)

Specifications of CAT811JEUS-T

Number Of Voltages Monitored

Monitored Voltage

2.5 V, 3 V, 3.3 V, 5 V

Output Type

Active Low, Push-Pull

Manual Reset

Resettable

Watchdog

No Watchdog

Battery Backup Switching

No Backup

Power-up Reset Delay (typ)

240 ms

Supply Voltage (max)

5.5 V

Supply Voltage (min)

1.2 V

Supply Current (typ)

8 uA

Maximum Power Dissipation

320 mW

Maximum Operating Temperature

+ 85 C

Mounting Style

SMD/SMT

Package / Case

SOT-143-4

Minimum Operating Temperature

- 40 C

Power Fail Detection

Undervoltage Threshold

3.93 V

Overvoltage Threshold

4.06 V

Lead Free Status / Rohs Status

Lead free / RoHS Compliant

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4-Pin Microprocessor Power Supply Supervisors

with Manual Reset

FEATURES

 Precision monitoring of

 Manual reset input

 Offered in two output configurations:

 CAT811: Active LOW reset

 CAT812: Active HIGH reset

 Direct replacements for the MAX811 and

 Reset valid down to V

 6µA power supply current

 Power supply transient immunity

 Available in SOT-143 packages with Sn or

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

APPLICATION

 Computers, Servers, Laptops

 Cable modems

 Wireless communications

 Embedded control systems

 White goods

 Power meters

 Intelligent instruments

 PDAs and handheld equipment

THRESHOLD SUFFIX SELECTOR

DESCRIPTION

Characteristics subject to change without notice

Nominal Threshold

+5.0 V (± 5%, ± 10%, ± 20%),

+3.3 V (± 5%, ± 10%),

+3.0 V (± 10%) and

+2.5 V (± 5%) power supplies

MAX812 in applications operating over the

industrial temperature range

NiPdAu Green Lead finishes.

Voltage

4.63V

4.38V

4.00V

3.08V

2.93V

2.63V

2.32V

Threshold Suffix

Designation

= 1.0V

DESCRIPTION

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.

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

Catalyst Semiconductor, makes it possible to offer any

custom

standard threshold levels are offered to support

+5.0V, +3.3V, +3.0V and +2.5V 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 SOT-143 package.

PIN CONFIGURATION

For Ordering Information details, see page 10.

reset

¯¯¯¯¯¯

RESET

GND

threshold

CAT811, CAT812

CAT811

CAT812

value.

4 V

¯¯¯

Seven

Doc. No. MD-3005 Rev. V

2(TM)

used by

industry

Related parts for CAT811JEUS-T

CAT811JEUS-T Summary of contents

Page 1

Microprocessor Power Supply Supervisors with Manual Reset 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 ...

Page 2

CAT811, CAT812 PIN DESCRIPTION Pin Number Name CAT811 CAT812 1 1 GND ¯¯¯¯¯¯ 2 — RESET — 2 RESET ¯¯¯ BLOCK DIAGRAM MR V TOLERANCE TOLERANCE CC Doc. No. MD-3005 ...

Page 3

ABSOLUTE MAXIMUM RATINGS Parameters Any pin with respect to ground Input Current ¯¯¯¯¯¯ Output Current RESET, RESET Rate of Raise Continuous Power Dissipations Derate 4mW/ºC above +70ºC (SOT-143) Storage Temperature Operating Ambient Temperature Lead Soldering (10 ...

Page 4

CAT811, CAT812 ELECTRICAL OPERATING CHARACTERISTICS (continued Full range -40°C to +85°C unless otherwise noted. Typical values L/M/J versions 3.3V for the T/S versions Parameter Symbol Reset Threshold Tempco ...

Page 5

TYPICAL OPERATING CHARACTERISTICS V = Full range -40°C to +85°C unless otherwise noted. Typical values L/M/J versions 3.3V for the T/S versions POWER-UP RESET TIMEOUT VS. TEMPERATURE 260 240 V ...

Page 6

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 ...

Page 7

VALID RESET WITH V UNDER 1.0V CC ¯¯¯¯¯¯ pin known To ensure that the CAT811 RESET state when V is under 1.0V, a 100kΩ pull-down CC ¯¯¯¯¯¯ resistor between RESET pin recommended; the value is not critical. ...

Page 8

CAT811, CAT812 OTHER SUPERVISORY PRODUCTS Function CAT1161/3 With 16k Bit Serial EEPROM Memory Watchdog Timer Manual Reset Input Active Low Reset Active High Reset Dual Polarity Reset Outputs 8-pin DIP Package and SOIC Doc. No. MD-3005 Rev. V CAT1162 CAT809 ...

Page 9

PACKAGE OUTLINE DRAWING (1) SOT-143 4-Lead (TB TOP VIEW b1 SIDE VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC satndard TO-253. © 2010 SCILLC. All rights reserved. Characteristics subject to ...

Page 10

CAT811, CAT812 EXAMPLE OF ORDERING INFORMATION Prefix Device # CAT 811 Company ID Product Number 811: Push-Pull/Active Low Output 812: Push-Pull/Active High Output Notes: (1) All packages are RoHS-compliant (Lead-free, Halogen-free). (2) The standard lead finish is NiPdAu. Contact factory ...

Page 11

REVISION HISTORY Date Rev. Description 22-Oct-03 L Updated Ordering Information Updated Features Replaced power-up reset timeout vs. temperature graph with updated 22-Dec-03 M one Replaced V 22-Mar-04 N General data sheet updates 25-Mar-04 O Updated Electrical Characteristics (Reset Active Timeout ...

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