CAT803 Datasheet, PDF (1/14 Pages) Catalyst Semiconductor – 3-Pin Microprocessor Power Supply Supervisors

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
■ Reset valid down to V_CC = 1.0V
■ 6µA power supply current
■ Power supply transient immunity
■ Industrial temperature range: -40ºC to +85ºC
■ Available in RoHS-compliant SOT-23 and SC-70
packages
Applications
■ Computers
■ Servers
■ Laptops
■ Cable modems
■ Wireless communications
■ Embedded control systems
■ White goods
■ Power meters
■ Intelligent instruments
■ PDAs and handheld equipment
Pin Configuration
3-Lead SOT23
3-Lead SC70
GND 1
RESET 2
(RESET)
(CAT803)
CAT809 3 VCC
(CAT810)
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(TM) used by Catalyst Semiconductor,
makes it possible to offer any custom reset threshold
value. Seven industry standard threshold 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
the output is guaranteed to be in the correct state at V_cc
levels as low as 1.0V.
The CAT803, CAT809, and CAT810 are available in both
the compact 3-pin SOT-23 and SC-70 packages.
For Ordering Information details, see page 11 & 12.
Threshold suffix selector
Nominal Threshold Threshold Suffix
Voltage
Designation
4.63V
L
4.38V
M
4.00V
J
3.08V
T
2.93V
S
2.63V
R
2.32V
Z
© 2010 SCILLC. All rights reserved.

Characteristics subject to change without notice
Doc. No. MD-3004, Rev. AA