CAT803, CAT809, CAT810
3-Pin Microprocessor Power Supply
Supervisors
FꢀATꢁꢂꢀS
DESCRIPTIOꢀ
■ Precision monitoring of
+5.0V (-5%, -10%, -20%),
+3.3V (-5%, -10%),
The CAT803, CAT809, and CAT8ꢀ0 are supervisory
circuitsthatmonitorpowersuppliesindigitalsystems.The
CAT803, CAT809, and CAT8ꢀ0 are direct replacements
for the MAX803, MAX809 and MAX8ꢀ0 in applications
operating over the industrial temperature range.
+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
Thesedevicesgeneratearesetsignal,whichisasserted
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
floating gate technology, AE2(TM) used by Catalyst
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.
■ Direct replacements for the MAX803, MAX809
and MAX810 in applications operating over the
industrial temperature range
■ ꢂeset valid down to VCC = 1.0V
■ 6µA power supply current
The CAT803 has an open-drain RESET output (active
LOW). The CAT803 requires a pull-up resistor on the
reset output.
■ Power supply transient immunity
■ Industrial temperature range: -40ºC to +85ºC
■ Available in RoHS-compliant SOT-23 and SC70
The CAT809 features a push-pull RESET output (active
LOW) and the CAT810 features a push-pull RESET
output (active HIGH).
packages
APPLICATIOꢀS
■ Computers
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 ꢀ.0V.
■ Servers
■ Laptops
TheCAT803,CAT809,andCAT8ꢀ0areavailableinboth
the compact 3-pin SOT-23 and SC70 packages.
■ Cable modems
■ Wireless communications
■ ꢀmbedded control systems
■ White goods
ꢁor Ordering Information details, see page 11.
■ Power meters
■ Intelligent instruments
■ PDAs and handheld equipment
THRESHOLD SꢂꢁꢁIX SELECTOR
ꢀominal Threshold Threshold Suffix
Voltage
4.63V
4.38V
4.00V
3.08V
2.93V
2.63V
2.32V
Designation
PIꢀ COꢀꢁIGꢂRATIOꢀ
L
M
J
3-Lead SOT23
3-Lead SC70
T
S
R
Z
GND
1
2
(CAT803)
CAT809
(CAT810)
3
V
CC
RESET
(RESET)
© 2007 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Doc. No. 3004, Rev. X
ꢀ