4-Pin Microprocessor Power Supply Supervisors
CAT811, CAT812
4-Pin Microprocessor Power Supply Supervisors FEATURES
s Precision monitoring of
H
GEN FR ALO
EE
LE
...
Description
CAT811, CAT812
4-Pin Microprocessor Power Supply Supervisors FEATURES
s Precision monitoring of
H
GEN FR ALO
EE
LE
A D F R E ETM
s Direct replacements for the MAX811 and
+5.0 V (+/- 5%, +/- 10%, +/- 20%), +3.3 V (+/- 5%, +/ 10%), +3.0 V (+/- 10%) and +2.5 V (+/- 5%) power supplies
s Offered in two output configurations:
MAX812 in applications operating over the industrial temperature range
s Reset valid down to VCC = 1.0 V s 6 µA power supply current s Power supply transient immunity s Compact 4-pin SOT143 package s Industrial temperature range: -40˚C to +85˚C
- CAT811: Active LOW reset - CAT812: Active HIGH reset
s Manual reset input
APPLICATIONS
s Computers s Servers s Laptops s Cable modems s Wireless communications s Embedded control systems s White goods s Power meters s Intelligent instruments s PDAs and handheld equipment
DESCRIPTION
The CAT811 and CAT812 are µP supervisory circuits that monitor power supplies in digital systems. The CAT811 and CAT812 are direct replacements for the MAX811 and MAX812 in applications operating over the industrial temperature range; both have a manual reset input. 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, AE2(TM) used by Catalyst Semiconductor, makes it possible to offer any custom reset threshold value. Seven industry standard ...
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