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CAT809
Low Cost Microcontroller Power Supply Supervisors, Active Low
CAT803, CA T809, CAT810
3-Pin Microprocessor
Power Supply Supervisors
Description
The CAT803, CAT809, and CAT810 are supervisory circuits that
monitor power supplies in digital systems. The CA T803, CAT809, and
CAT810 are direct replacements for the MAX803, MAX809 and
MAX810 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
140 ms after the power supply level has risen above that level. The
underlying floating gate technology, Analog EEPROM used by 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 CAT803 has an openïdrain RESET output (active LOW). The
CAT803 requires a pullïup resistor on the reset output.
The CAT809 features a pushïpull RESET output (active LOW) and
the CAT810 features a pushïpull RESET 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 CAT803, CAT809, and CAT810 are available in both the
compact 3ïpin SOTï23 and SCï70 packages.
Features Precision Monitoring of
+5.0 V (ï5%, ï10%, ï20%),
+3.3 V (ï5%, ï10%),
+3.0 V (ï10%) and
+2.5 V (ï5%) Power Supplies Offered in Three Output Configurations:
ï CAT803: OpenïDrain Active LOW Reset
ï CAT809: PushïPull Active LOW Reset
ï CAT810: PushïPull Active HIGH Reset Direct Replacements for the MAX803, MAX809 and MAX810 in
Applications Operating over the Industrial Temperature Range Reset Valid down to VCC = 1.0 V6 A Power Supply Current Power Supply Transient Immunity Industrial Temperature Range: ï40°C to +85°C Available in SOTï23 and SCï70 Packages These Devices are PbïFree and are RoHS Compliant
Applications Computers, Servers, Laptops, Cable Modems Wireless Communications Embedded Control Systems White Goods, Power Meters Intelligent Instruments
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PIN CONFIGURATION
VCC
RESET
(RESET)
GND
See detailed ordering and shipping information in the package
dimensions section on page 8 of this data sheet.
ORDERING INFORMATION
(Top View)
SOTï23
TB SUFFIX
CASE 527AG
SCï70
SD SUFFIX
CASE 419AB
CAT803
CAT809
(CAT810)
3ïLead SOT23
3ïLead SC70
XXXM
XXX = Specific Device Code = Month Code = PbïFree Package
XXXM
MARKING DIAGRAMS
(*Note: Microdot may be in either location)
SOTï23 SCï70
