© Semiconductor Components Industries, LLC, 2012
October, 2012 − Rev. 1
1 Publication Order Number:
CAX803/D
CAX803, CAX809, CAX810
3-Pin Microprocessor
Power Supply Supervisors
Description
The CAX803, CAX809, and CAX810 are supervisory circuits that
monitor power supplies in digital systems. The CAX803, CAX809,
and CAX810 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
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 CAX803 has an open−drain RESET
output (active LOW). The
CAX803 requires a pull−up resistor on the reset output.
The CAX809 features a push−pull RESET
output (active LOW) and
the CAX810 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 CAX803, CAX809, and CAX810 are available in the compact
3−pin SOT−23 package.
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:
− CAX803: Open−Drain Active LOW Reset
− CAX809: Push−Pull Active LOW Reset
− CAX810: 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
• 10 mA Power Supply Current
• Power Supply Transient Immunity
• Industrial Temperature Range: −40°C to +85°C
• Available in SOT−23 Package
• 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 9 of this data sheet.
ORDERING INFORMATION
(Top View)
SOT−23
TB SUFFIX
CASE 527AG
2
3
CAX803
CAX809
(CAX810)
3−Lead SOT23
XXXMG
G
XXX = Specific Device Code
M = Month Code
G = Pb−Free Package
MARKING DIAGRAMS
(*Note: Microdot may be in either location)
SOT−23
