CAT812TTBI-GT10 datasheet(1/11 Pages) CATALYST

No. de pieza	CAT812TTBI-GT10

Descripción Electrónicos	4-Pin Microprocessor Power Supply Supervisors with Manual Reset

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CAT811, CAT812

1

Doc. No. MD-3005 Rev. S

Characteristics subject to change without notice

4-Pin 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 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 = 1.0V

6µA power supply current

Power supply transient immunity

Available in SOT-143 packages with Sn or

NiPdAu Green Lead finishes.

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

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

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.

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.

For Ordering Information details, see page 10.

THRESHOLD SUFFIX SELECTOR

DESCRIPTION

Nominal Threshold

Voltage

Threshold Suffix

Designation

4.63V

L

4.38V

M

4.00V

J

3.08V

T

2.93V

S

2.63V

R

2.32V

Z

PIN CONFIGURATION

4 VCC

GND 1

RESET

¯¯¯¯¯¯ 2

3 MR

¯¯¯

CAT811

CAT812

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