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CAT812RTBI-T3

P1-P3P4-P6P7-P9
© Semiconductor Components Industries, LLC, 2012
October, 2012 − Rev. 2
1 Publication Order Number:
CAT811/D
CAT811, CAT812
4-Pin Microprocessor
Power Supply Supervisors
with Manual Reset
Description
The CAT811 and CAT812 are microprocessor supervisory 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
140 ms after the power supply level has risen above that level. The
underlying floating gate technology, Analog EEPROM used by
ON Semiconductor, makes it possible to offer any custom reset
threshold value. Seven industry standard threshold levels are 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 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.
Features
• 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
CC
= 1.0 V
• 6 mA Power Supply Current
• Power Supply Transient Immunity
• Available in SOT−143 Packages with Sn or NiPdAu Green Lead
Finishes
• Industrial Temperature Range: −40°C to +85°C
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
Applications
• Computers, Servers, Laptops and Cable Modems
• Wireless Communications
• Embedded Control Systems
• White Goods, Power Meters
• Intelligent Instruments
• PDAs and Handheld Equipment
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PIN CONFIGURATION
See detailed ordering and shipping information in the package
dimensions section on page 9 of this data sheet.
ORDERING INFORMATION
SOT−143
BI SUFFIX
CASE 527AF
(Top View)
RESET
GND
V
CC
MR
1
2
4
3
1
MARKING DIAGRAM
XXX = Specific Device Code
M = Month Code
G = Pb−Free Package
(*Note: Microdot may be in either location)
XXXMG
G
CAT811, CAT812
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2
Table 1. THRESHOLD SUFFIX SELECTOR DESCRIPTION
Nominal Threshold Voltage Threshold Suffix Designation
4.63 V L
4.38 V M
4.00 V J
3.08 V T
2.93 V S
2.63 V R
2.32 V Z
Table 2. PIN DESCRIPTION
Pin Number
Pin Name Description
CAT811 CAT812
1 1 GND Ground.
2 − RESET Active LOW reset. RESET is asserted if V
CC
falls below the reset threshold and re-
mains low for at least 140 ms after V
CC
rises above the reset threshold.
− 2 RESET Active HIGH reset. RESET is asserted if V
CC
falls below the reset threshold and re-
mains high for at least 140 ms after V
CC
rises above the reset threshold.
3 3 MR Manual Reset Input. A logic LOW on MR asserts RESET. RESET remains active as
long as MR is LOW and for 140 ms after MR returns HIGH. The active low input has
an internal 20 kW pull−up resistor. The input should be left open if not used.
4 4 V
CC
Power supply voltage that is monitored.
Figure 1. Block Diagrams
CAT812
RESET
+
–
RESET
&
DIGITAL
DELAY
TOLERANCE
BIAS
VOLTAGE
REFERENCE
GND
CAT811
+
–
RESET
&
DIGITAL
DELAY
TOLERANCE
BIAS
VOLTAGE
REFERENCE
GND
V
CC
V
CC
V
CC
RESET
V
CC
V
CC
V
CC
MR
MR
CAT811, CAT812
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3
Table 3. ABSOLUTE MAXIMUM RATINGS
Parameters Ratings Units
Any pin with respect to ground −0.3 to +6.0 V
Input Current, V
CC
20 mA
Output Current RESET, RESET 20 mA
Rate of Raise, V
CC
100
V/ms
Continuous Power Dissipations
Derate 4 mW/°C above +70°C (SOT−143)
320 mW
Storage Temperature Range −65 to +105 °C
Operating Ambient Temperature Range −40 to +85 °C
Lead Soldering Temperature (10 seconds) +300 °C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
Table 4. ELECTRICAL OPERATING CHARACTERISTICS
(V
CC
= Full range, T
A
= −40°C to +85°C unless otherwise noted. Typical values at T
A
= +25°C and V
CC
= 5 V for the L/M/J versions,
V
CC
= 3.3 V for the T/S versions, V
CC
= 3 V for the R version and V
CC
= 2.5 V for the Z version.)
Parameter Symbol Conditions Min Typ Max Units
V
CC
Range
T
A
= 0°C to +70°C 1.0 5.5
V
T
A
= −40°C to +85°C 1.2 5.5
Supply Current I
CC
T
A
= −40°C to +85°C
V
CC
< 5.5 V, J/L/M 8 20 mA
V
CC
< 3.6 V, R/S/T/Z 6 15
Reset Threshold
Voltage
V
TH
L Threshold
T
A
= +25°C 4.56 4.63 4.70
V
T
A
= −40°C to +85°C 4.50 4.75
M Threshold
T
A
= +25°C 4.31 4.38 4.45
T
A
= −40°C to +85°C 4.25 4.50
J Threshold
T
A
= +25°C 3.93 4.00 4.06
T
A
= −40°C to +85°C 3.89 4.10
T Threshold
T
A
= +25°C 3.04 3.08 3.11
T
A
= −40°C to +85°C 3.00 3.15
S Threshold
T
A
= +25°C 2.89 2.93 2.96
T
A
= −40°C to +85°C 2.85 3.00
R Threshold
T
A
= +25°C 2.59 2.63 2.66
T
A
= −40°C to +85°C 2.55 2.70
Z Threshold
T
A
= +25°C 2.28 2.32 2.35
T
A
= −40°C to +85°C 2.25 2.38
Reset Threshold
Tempco
30 ppm/°C
V
CC
to Reset Delay
(Note 3)
V
CC
= V
TH
to (V
TH
− 100 mV) 20
ms
Reset Active
Timeout Period
T
A
= −40°C to +85°C 140 240 400 ms
1. Production testing done at T
A
= +25°C; limits over temperature guaranteed by design only.
2. Glitches of 100 ns or less typically will not generate a reset pulse.
3. RESET output for the CAT811; RESET output for the CAT812.
P1-P3P4-P6P7-P9

CAT812RTBI-T3

Mfr. #:
Buy CAT812RTBI-T3
Manufacturer:
ON Semiconductor
Description:
Supervisory Circuits 2.63V Push-Pull High
Lifecycle:
New from this manufacturer.
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