CAT812 Catalyst Semiconductor, CAT812 Datasheet

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CAT812

Manufacturer Part Number
CAT812
Description
4-pin Microprocessor Voltage Supervisor
Manufacturer
Catalyst Semiconductor
Datasheet

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4-Pin Microprocessor Power Supply Supervisors
with Manual Reset
FEATURES
APPLICATION
THRESHOLD SUFFIX SELECTOR
DESCRIPTION
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Nominal Threshold
Precision monitoring of
+5.0 V (± 5%, ± 10%, ± 20%),
+3.3 V (± 5%, ± 10%),
+3.0 V (± 10%) and
+2.5 V (± 5%) power supplies
Manual reset input
Offered in two output configurations:
CAT811: Active LOW reset
CAT812: Active HIGH reset
Direct replacements for the MAX811 and
MAX812 in applications operating over the
industrial temperature range
Reset valid down to V
6µA power supply current
Power supply transient immunity
Available in SOT-143 packages with Sn or
NiPdAu Green Lead finishes.
Industrial temperature range: -40ºC to +85ºC
Computers, Servers, Laptops
Cable modems
Wireless communications
Embedded control systems
White goods
Power meters
Intelligent instruments
PDAs and handheld equipment
Voltage
4.63V
4.38V
4.00V
3.08V
2.93V
2.63V
2.32V
Threshold Suffix
CC
Designation
= 1.0V
M
S
R
L
T
Z
J
1
DESCRIPTION
The CAT811 and CAT812 are microprocessor supervi-
sory circuits that monitor power supplies. 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 140ms after the
power supply level has risen above that level. The
underlying floating gate technology, AE
Catalyst Semiconductor, makes it possible to offer any
custom
standard threshold levels are offered to support
+5.0V, +3.3V, +3.0V and +2.5V 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
Vcc 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 SOT-143 package.
PIN CONFIGURATION
For Ordering Information details, see page 10.
reset
¯¯¯¯¯¯
RESET
GND 1
threshold
2
CAT811, CAT812
CAT811
CAT812
value.
4 V
3
¯¯¯
Seven
MR
CC
Doc. No. MD-3005 Rev. S
2(TM)
used by
industry

Related parts for CAT812

CAT812 Summary of contents

Page 1

... 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 the correct state at Vcc levels as low as 1 ...

Page 2

... CAT811, CAT812 PIN DESCRIPTION Pin Number Name CAT811 CAT812 1 1 GND ¯¯¯¯¯¯ 2 — RESET — 2 RESET 3 3 ¯¯¯ BLOCK DIAGRAM MR V TOLERANCE TOLERANCE CC Doc. No. MD-3005 Rev. S Description Ground ¯¯¯¯¯¯ is asserted if V Active LOW reset ...

Page 3

... +25° -40°C to +85° +25° -40°C to +85° +25° -40°C to +85° CAT811, CAT812 Ratings Units -0 6 100 V/µs 320 mW -65 to +105 ºC -40 to +85 ºC +300 ºC = +25°C and for the ...

Page 4

... Notes: (1) Production testing done +25˚C; limits over temperature guaranteed by design only. A ¯¯¯¯¯¯ output for the CAT811; RESET output for the CAT812 (2) RESET (3) Glitches of 100ns or less typically will not generate a reset pulse Doc. No. MD-3005 Rev for the R version and V ...

Page 5

... V =2. 100 150 -50 1.0002 1 0.9998  0.9996  0.9994  0.9992 0.999  0.9988 100 150 0 5 CAT811, CAT812 = +25°C and for the 2.5V for the Z version. CC (NO LOAD, CAT8xxR/S/T/Z) V =5. =3. 100 150 TEMPERATURE (°C) NORMALIZED RESET THRESHOLD VS. TEMPERATURE ...

Page 6

... DETAILED DESCRIPTION RESET TIMING 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. ...

Page 7

... To ensure that the CAT811 RESET state when V is under 1.0V, a 100kΩ pull-down CC ¯¯¯¯¯¯ resistor between RESET pin recommended; the value is not critical. For the CAT812, a pull-up resistor from RESET pin to V needed. Power Supply V CC CAT811 MR RESET GND ¯ ...

Page 8

... CAT811, CAT812 OTHER SUPERVISORY PRODUCTS Function CAT1161/3 With 16k Bit Serial EEPROM Memory Watchdog Timer Manual Reset Input Active Low Reset Active High Reset Dual Polarity Reset Outputs 8-pin DIP Package and SOIC Doc. No. MD-3005 Rev. S CAT1162 CAT809 CAT810 8-pin DIP ...

Page 9

... All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC satndard TO-253. © Catalyst Semiconductor, Inc. Characteristics subject to change without notice SYMBOL θ θ CAT811, CAT812 MIN NOM MAX 0.80 1.22 0.05 0.15 0.75 0.90 1.07 0.30 0.50 0.76 0.89 0.08 0.20 2.80 2.90 3.04 2.10 2.64 1.20 1.30 1.40 1.92 BSC 0.20 BSC 0.40 0.50 0.60 ...

Page 10

... CAT811, CAT812 EXAMPLE OF ORDERING INFORMATION Prefix Device # CAT 811 Company ID Product Number 811: Push-Pull/Active Low Output 812: Push-Pull/Active High Output For Product Top Mark Codes, click here: http://www.catsemi.com/techsupport/producttopmark.asp Notes: (1) All packages are RoHS-compliant (Lead-free, Halogen-free). (2) The standard lead finish is NiPdAu. Contact factory for other package availability. ...

Page 11

... 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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