cat885 Catalyst Semiconductor, cat885 Datasheet

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cat885

Manufacturer Part Number
cat885
Description
Five-channel Power Supply Supervisors
Manufacturer
Catalyst Semiconductor
Datasheet
Five-Channel Power Supply Supervisors
FEATURES
APPLICATIONS
PIN CONFIGURATION
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Five-channel supply voltage detection
2 V
+5.0V, +3.3V, +3.0V, +2.5V or +1.8V supplies
3 adjustable voltage inputs allow monitoring
supplies > 0.6V
70ms minimum reset delay
Manual reset capability
Reset signals valid down to V
Accurate ± < 2% voltage threshold
Power-supply transients suppressed
Low 2µA maximum supply current at 5V
RoHS-compliant MSOP package
Telecom & datacom systems
Routers & servers
Data storage equipment
Set-top boxes
Multi-voltage systems
DD
inputs allow monitoring of
V
¯¯¯ 1
MR
V
V
See page 2 for pin functions
DD2
DD
SS
MSOP 8-Lead (Z)
2
3
4
(top view)
CAT885
8 RST
7 V5MON
6 V4MON
5 V3MON
DD
¯¯¯¯
= 1V
1
DESCRIPTION
The
supervisory circuit with high reset thereshold accuracy
and very low power consumption. The device features
an open-drain output, active-low function with manual
reset to perform basic system reset and monitoring
functions for a wide range of electronic products. The
CAT885 monitors five system voltages by maintaining a
reset output active until all the power supply voltages
exceed the specified trip values.
maintains the reset output in an active condition until
the internal timer times out, which allows the system
power supplies to stabilize.
Two of the five voltage detectors are factory set for
standard supplies, while the threshold voltages of the
third, fourth, and fifth voltage monitors can be adjusted
for specific system design requirements using external
resistors.
The CAT885 lowers system costs and saves board
space by integrating five channels into a single, small
MSOP 8-lead package.
TYPICAL APPLICATION
For Ordering Information details see page 7.
CAT885
V
V
V3MON
V4MON
V5MON
DD
DD2
is
a
CAT885
five-channel
V
SS
RST
MR
The device then
Doc. No. MD-3028 Rev. A
power
CAT885
Reset
Signal
PB
supply

Related parts for cat885

cat885 Summary of contents

Page 1

... The CAT885 lowers system costs and saves board space by integrating five channels into a single, small MSOP 8-lead package. For Ordering Information details see page 7. ...

Page 2

... CAT885 FUNCTIONAL BLOCK DIAGRAM DD2 V3MON V SS PIN FUNCTIONS Pin # Pin Function 1 ¯¯¯ Active-low manual reset Input with internal pull-up resistor Chip supply, first preset under-voltage detector input Second preset under-voltage detector input DD2 4 V Ground ...

Page 3

... Characteristics subject to change without notice (1) SS (2) Conditions 3.3V DD2 V3, V4, V5MON = 1.0V CAT885Lx DD CAT885Sx V = 4.63V TH1 V = 2.87V TH1 CAT885xT CAT885xS DD2 CAT885xZ CAT885xA V = 3.08V TH2 V = 2.95V TH2 V = 2.33V TH2 V = 1.68V TH2 V for V3, V4, V5MON TH 3 CAT885 Ratings Units -40 to +125 ºC -1 ...

Page 4

... Supervision, Power On Reset control and Manual Reset Assertion. These features along with excellent threshold accuracy and low power consumption make the CAT885 device suitable for a wide variety of applications needing multi-voltage monitoring. During normal operation, the CAT885 monitors the , V2MON, V3MON, V4MON, and ...

Page 5

... POWER ON RESET (POR) Applying power to the CAT885 activates a POR circuit which activates the reset output (active LOW). At power-up POR prevents the system microprocessor from starting to operate with insufficient voltage and prior to stabilization of the clock oscillator. It ensures that operation is precluded until internal registers are properly loaded, FPGA’ ...

Page 6

... CAT885 PACKAGE OUTLINE DRAWING (1)(2) MSOP 8-Lead 3 x 3mm ( TOP VIEW SIDE VIEW For current Tape and Reel information, download the PDF file from: http://www.catsemi.com/documents/tapeandreel.pdf. Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC standard MO-187. Doc. No. MD-3028 Rev. A ...

Page 7

... All packages are RoHS-compliant (Lead-free, Halogen-free). (2) The standard finish is NiPdAu. (3) The device used in the above example is a CAT885ZI-LS-GT3 (MSOP, Industrial Temperature, 4.63V (V Levels, NiPdAu, Tape & Reel, 3,000/Reel). (4) For additional detection voltage, package and temperature options, please contact your nearest Catalyst Semiconductor Sales office. ...

Page 8

... Catalyst Semiconductor products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Catalyst Semiconductor product could create a situation where personal injury or death may occur. ...

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