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© Semiconductor Components Industries, LLC, 2011
May, 2011 − Rev. 29
1 Publication Order Number:
CAT803/D
CAT803, CAT809, CAT810
3-Pin Microprocessor
Power Supply Supervisors
Description
The CAT803, CAT809, and CAT810 are supervisory circuits that
monitor power supplies in digital systems. The CAT803, 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, AE
2
t used by ON 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 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 the output is
guaranteed to be in the correct state at V
CC
levels as low as 1.0 V.
The CAT803, CAT809, and CAT810 are available in both the
compact 3−pin SOT−23 and SC−70 packages.
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
• 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
• Reset Valid down to V
CC
= 1.0 V
• 6 mA Power Supply Current
• Power Supply Transient Immunity
• Industrial Temperature Range: −40°C to +85°C
• Available in SOT−23 and SC−70 Packages
• These Devices are Pb−Free and are RoHS Compliant
Applications
• Computers, Servers, Laptops, Cable Modems
• Wireless Communications
• Embedded Control Systems
• White Goods, Power Meters
• Intelligent Instruments
• PDAs and Handheld Equipment
http://onsemi.com
PIN CONFIGURATION
V
CC
RESET
(RESET)
GND
1
See detailed ordering and shipping information in the package
dimensions section on page 11 of this data sheet.
ORDERING INFORMATION
(Top View)
SOT−23
TB SUFFIX
CASE 527AG
MARKING INFORMATION
SC−70
SD SUFFIX
CASE 419AB
2
3
CAT803
CAT809
(CAT810)
3−Lead SOT23
3−Lead SC70
1. All threshold trip level options have the same
marking.
2. The “YM” in the SOT−23 package marking indic-
ates the Year and Month of production and the “_”
in the SC70 package marking indicates the as-
sembly location.
3. 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.
4. CAT809V is available only in the SOT−23 package
and the Top Markings for this package is SKYM.
CAT803x RNYM RN_
CAT809x (Note 4) NRYM NR_
CAT810x NSYM NS_
Device (Note 1)
SOT−23 RoHS
NiPdAu
Finish
(Notes 2, 3)
SC70 RoHS
NiPdAu
Finish
(Notes 2, 3)
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