CAT811 CATALYST [Catalyst Semiconductor], CAT811 Datasheet

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CAT811

Manufacturer Part Number
CAT811
Description
4-Pin Microprocessor Power Supply Supervisors
Manufacturer
CATALYST [Catalyst Semiconductor]
Datasheet

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The CAT811 and CAT812 are P 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, AE
makes it possible to offer any custom reset threshold
value. Seven industry standard threshold levels are
© 2004 by Catalyst Semiconductor, Inc., Patent Pending
Characteristics subject to change without notice
Nominal Threshold
Voltage
4.63V
4.38V
4.00V
3.08V
2.93V
2.63V
2.32V
2(TM)
used by Catalyst Semiconductor,
Threshold Suffix
Designation
M
T
S
R
Z
L
J
1
offered to support +5.0 V, +3.3 V, +3.0 V and +2.5 V
systems.
The CAT811 features a RESET push-pull output (active
LOW) and the CAT812 features a RESET push-pull
output (active HIGH).
Fast transients on the power supply are ignored and the
output is guaranteed to be in the correct state at V
levels as low as 1.0 V.
The CAT811/812 are fully specified over the industrial
temperature range (-40˚C to 85˚C) and are available in
a compact 4-pin SOT143 package.
(RESET)
RESET
GND
1
2
4
3
V CC
Doc. No. 3005, Rev. P
cc
TM

Related parts for CAT811

CAT811 Summary of contents

Page 1

... Fast transients on the power supply are ignored and the output is guaranteed the correct state at V levels as low as 1.0 V. The CAT811/812 are fully specified over the industrial temperature range (-40˚C to 85˚C) and are available in a compact 4-pin SOT143 package. GND ...

Page 2

... Insert threshold suffix ( into the blank position. Example: CAT811LTBI-T for 4.63 V, and lead-free SOT143 package ...

Page 3

GND RESET 2 — — 2 RESET Patent Pending Ground Active LOW reset. RESET is asserted if V and remains low for at least 140ms after V Active HIGH reset. RESET ...

Page 4

Any pin with respect to ground .......... -0 +6.0 V Input Current, V ............................................. Output Current, RESET, RESET ...................... 20 mA Rate of Rise ............................................................. Continuous Power Dissipation Derate 4mW/˚C above 70˚C (SOT143) ...

Page 5

... MR Pull-up Resistance Note 1: Production testing done +25˚C; limits over temperature guaranteed by design only. A Note 2: RESET output for the CAT811; RESET output for the CAT812 Note 3: Glitches of 100 ns or less typically will not generate a reset pulse. Patent Pending (continued for R version and V ...

Page 6

V = Full range -40˚C to +85˚C unless otherwise noted. Typical values L/M/J versions, V =3.3 V for T/S versions POWER-UP RESET TIMEOUT VS. TEMPERATURE 260 240 V CC =5V 220 200 ...

Page 7

... The reset signal is asserted LOW for the CAT811 and HIGH for the CAT812 when the power supply voltage falls below the threshold trip voltage and remains asserted for at least 140ms after the power supply voltage has risen above the threshold. Power ...

Page 8

... V CC RESET GND RESET RESET RESET RESET RESET The CAT811/812 can interface with P/ C bi-directional reset pins by connecting a 4.7 k resistor in series with the CAT811/812 reset output and the P/ C bi-directional reset pin. Power Supply V CC CAT811 GND Doc. No. 3005, Rev ...

Page 9

With 16k Bit Serial EEPROM Memory Watchdog Timer Manual Reset Input Active Low Reset Active High Reset Dual Polarity Reset Outputs Package DIP and SOIC 2.05 MAX 1.78 MIN 0.20 0.89 MAX 0.76 MIN 3.04 MAX 2.80 MIN 1.12 MAX ...

Page 10

L Updated Ordering Information 12/22/2003 M Updated Features Replaced power-up reset timeout vs. temperature graph with updated one Relaced VCC Transient Response graph with updated one 3/22/04 N Updated Features Updated Description Updated Ordering Information Added Top Markings Updated ...

Page 11

Copyrights, Trademarks and Patents Trademarks and registered trademarks of Catalyst Semiconductor include each of the following: DPP ™ ™ Catalyst Semiconductor has been issued U.S. and foreign patents and has patent applications pending that protect its products. For ...

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