© 2007 by Catalyst Semiconductor, Inc.

Characteristics subject to change without notice

Doc. No. 3004, Rev. X

CAT803, CAT809, CAT810

3-Pin Microprocessor Power Supply

Supervisors

FeATureS

Precision monitoring of

+5.0V (-5%, -10%, -20%),

+3.3V (-5%, -10%),

+3.0V (-10%) and

+2.5V (-5%) power supplies

Offered in three output configurations:

- CAT803: Open-Drain Active LOW reset

- CAT809: Push-Pull Active LOW reset

- CAT810: Push-Pull Active HIGH reset

Direct replacements for the MAX803, MAX809

and MAX810 in applications operating over the

industrial temperature range

6µA power supply current

Power supply transient immunity

Industrial temperature range: -40ºC to +85ºC

Available in RoHS-compliant SOT-23 and SC70

packages

APPLICATIOnS

Computers

Servers

Laptops

Cable modems

Wireless communications

embedded control systems

White goods

Power meters

Intelligent instruments

PDAs and handheld equipment

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DESCRIPTIOn

The CAT803, CAT809, and CAT80 are supervisory

circuitsthatmonitorpowersuppliesindigitalsystems.The

CAT803, CAT809, and CAT80 are direct replacements

for the MAX803, MAX809 and MAX80 in applications

operating over the industrial temperature range.

These devices generate a reset signal, which is asserted

while the power supply voltage is below a preset

threshold level and for at least 40 ms after the power

supply level has risen above that level. The underlying

Semiconductor, makes it possible to offer any custom

resetthresholdvalue.Sevenindustrystandardthreshold

levels are offered to support +5.0V, +3.3V, +3.0V and

+2.5V systems.

The CAT803 has an open-drain RESET output (active

LOW). The CAT803 requires a pull-up resistor on the

reset output.

The CAT809 features a push-pull RESET output (active

LOW) and the CAT810 features a push-pull RESET

output (active HIGH).

Fast transients on the power supply are ignored and

levels as low as .0V.

The CAT803, CAT809, and CAT80 are available in both

the compact 3-pin SOT-23 and SC70 packages.

PIn COnfIGuRATIOn

(CAT803)

CAT809

(CAT810)

GND

RESET

(RESET)

VCC

3-Lead SOT23

3-Lead SC70

1

2

3

THRESHOLD SuffIX SELECTOR

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

for Ordering Information details, see page 11.