Preliminary Information
CAT809, CAT810
Low Cost Microprocessor Power Supply Supervisors
FEATURES
s
Precision monitoring of 5V, 3.3V, 3.0V and 2.5V
s
RESET
guaranteed to V
CC
= 1V
s
Low supply current
power supply voltages
s
Seven reset threshold options
— 20
µ
A maximum at 5.5V
— 15
µ
A maximum at 3.6V
s
Power supply transient immunity
s
No external components required
s
Compact 3-pin SOT-23 and SC70 package
s
Direct MAX809, MAX810 replacement
— 4.63, 4.38, 4.00, 3.08, 2.93, 2.63 and 2.32V
s
Two push-pull reset output configurations
— CAT809: Active LOW reset
— CAT810: Active HIGH reset
s
140ms minimum reset period
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 CAT809 and CAT810 are microprocessor
supervisory circuits that monitor power supplies in
microprocessor-based systems and other digital systems.
Featuring reduced power supply current, the CAT809
and CAT810 are direct replacements for the MAX809
and MAX810.
A reset signal is asserted if the power supply voltage drops
below a preset threshold level. Seven threshold levels are
available to support 5V, 3.3V, 3.0V and 2.5V systems. The
CAT809 has an active LOW reset output that is guranteed
to be asserted for at least 140ms after the supply voltage
has risen above the threshold voltage. The CAT810 has
an active HIGH reset. The CAT809/810 have push-pull
outputs that do not require pull-up resistors. Fast transients
on the power supply are ignored and the outputs are
guaranteed to be in the correct state with the power supply
voltage as low as 1V.
The CAT809/810 are fully specified over the operating
temperature range and are available in compact 3-pin
SOT-23 and SC70 packages.
Seven threshold voltage options are available:
Normal Threshold
Voltage
4.63V
4.38V
4.00V
3.08V
2.93V
2.63V
2.32V
Threshold Suffix
Designation
L
M
J
T
S
R
Z
PIN CONFIGURATION
GND
1
CAT809
(CAT810)
3
VCC
RESET 2
(RESET)
3-Lead SOT23
3-Lead SC70
© 2003 by Catalyst Semiconductor, Inc., Patent Pending
Characteristics subject to change without notice
1
Doc. No. 3004, Rev. K
CAT809, CAT810
ORDERING INFORMATION
Ordering
Part Number
CAT809JEUR-T
CAT809JEUR-T10
CAT809JEXR-T
CAT809JEXR-T10
CAT809LEUR-T
CAT809LEUR-T10
CAT809LEXR-T
CAT809LEXR-T10
CAT809MEUR-T
CAT809MEUR-T10
CAT809MEXR-T
CAT809MEXR-T10
CAT809REUR-T
CAT809REUR-T10
CAT809REXR-T
CAT809REXR-T10
CAT809SEUR-T
CAT809SEUR-T10
CAT809SEXR-T
CAT809SEXR-T10
CAT809TEUR-T
CAT809TEUR-T10
CAT809TEXR-T
CAT809TEXR-T10
CAT809ZEUR-T
CAT809ZEUR-T10
CAT809ZEXR-T
CAT809ZEXR-T10
CAT810JEUR-T
CAT810JEUR-T10
CAT810LEUR-T
CAT810LEUR-T10
CAT810LEXR-T
CAT810LEXR-T10
CAT810MEUR-T
CAT810MEUR-T10
CAT810MEXR-T
CAT810MEXR-T10
CAT810REUR-T
CAT810REUR-T10
CAT810REXR-T
CAT810REXR-T10
CAT810SEUR-T
Nominal Threshold Temperature
Voltage (V)
4.00
4.00
4.00
4.00
4.63
4.63
4.63
4.63
4.38
4.38
4.38
4.38
2.63
2.63
2.63
2.63
2.93
2.93
2.93
2.93
3.08
3.08
3.08
3.08
2.32
2.32
2.32
2.32
4.00
4.00
4.63
4.63
4.63
4.63
4.38
4.38
4.38
4.38
2.63
2.63
2.63
2.63
2.93
Range
-40˚C to 105˚C
-40˚C to 105˚C
-40˚C to 125˚C
-40˚C to 125˚C
-40˚C to 105˚C
-40˚C to 105˚C
-40˚C to 125˚C
-40˚C to 125˚C
-40˚C to 105˚C
-40˚C to 105˚C
-40˚C to 125˚C
-40˚C to 125˚C
-40˚C to 105˚C
-40˚C to 105˚C
-40˚C to 125˚C
-40˚C to 125˚C
-40˚C to 105˚C
-40˚C to 105˚C
-40˚C to 125˚C
-40˚C to 125˚C
-40˚C to 105˚C
-40˚C to 105˚C
-40˚C to 125˚C
-40˚C to 125˚C
-40˚C to 105˚C
-40˚C to 105˚C
-40˚C to 125˚C
-40˚C to 125˚C
-40˚C to 105˚C
-40˚C to 105˚C
-40˚C to 105˚C
-40˚C to 105˚C
-40˚C to 125˚C
-40˚C to 125˚C
-40˚C to 105˚C
-40˚C to 105˚C
-40˚C to 125˚C
-40˚C to 125˚C
-40˚C to 105˚C
-40˚C to 105˚C
-40˚C to 125˚C
-40˚C to 125˚C
-40˚C to 105˚C
Manual
Reset
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
RESET
Polarity
Push-Pull, Active LOW
Push-Pull, Active LOW
Push-Pull, Active LOW
Push-Pull, Active LOW
Push-Pull, Active LOW
Push-Pull, Active LOW
Push-Pull, Active LOW
Push-Pull, Active LOW
Push-Pull, Active LOW
Push-Pull, Active LOW
Push-Pull, Active LOW
Push-Pull, Active LOW
Push-Pull, Active LOW
Push-Pull, Active LOW
Push-Pull, Active LOW
Push-Pull, Active LOW
Push-Pull, Active LOW
Push-Pull, Active LOW
Push-Pull, Active LOW
Push-Pull, Active LOW
Push-Pull, Active LOW
Push-Pull, Active LOW
Push-Pull, Active LOW
Push-Pull, Active LOW
Push-Pull, Active LOW
Push-Pull, Active LOW
Push-Pull, Active LOW
Push-Pull, Active LOW
Push-Pull, Active HIGH
Push-Pull, Active HIGH
Push-Pull, Active HIGH
Push-Pull, Active HIGH
Push-Pull, Active HIGH
Push-Pull, Active HIGH
Push-Pull, Active HIGH
Push-Pull, Active HIGH
Push-Pull, Active HIGH
Push-Pull, Active HIGH
Push-Pull, Active HIGH
Push-Pull, Active HIGH
Push-Pull, Active HIGH
Push-Pull, Active HIGH
Push-Pull, Active HIGH
Preliminary Information
Package
Parts
per Reel
TOP Marking
3-pin, SOT23
3-pin, SOT23
3-pin, SC70
3-pin, SC70
3-pin, SOT23
3-pin, SOT23
3-pin, SC70
3-pin, SC70
3-pin, SOT23
3-pin, SOT23
3-pin, SC70
3-pin, SC70
3-pin, SOT23
3-pin, SOT23
3-pin, SC70
3-pin, SC70
3-pin, SOT23
3-pin, SOT23
3-pin, SC70
3-pin, SC70
3-pin, SOT23
3-pin, SOT23
3-pin, SC70
3-pin, SC70
3-pin, SOT23
3-pin, SOT23
3-pin, SC70
3-pin, SC70
3-pin, SOT23
3-pin, SOT23
3-pin, SOT23
3-pin, SOT23
3-pin, SC70
3-pin, SC70
3-pin, SOT23
3-pin, SOT23
3-pin, SC70
3-pin, SC70
3-pin, SOT23
3-pin, SOT23
3-pin, SC70
3-pin, SC70
3-pin, SOT23
3K
10K
3K
10K
3K
10K
3K
10K
3K
10K
3K
10K
3K
10K
3K
10K
3K
10K
3K
10K
3K
10K
3K
10K
3K
10K
3K
10K
10K
3K
3K
10K
3K
10K
3K
10K
3K
10K
3K
10K
3K
10K
3K
CWxx
CWxx
FGxx
FGxx
AAxx
AAxx
FAxx
FAxx
ABxx
ABxx
FBxx
FBxx
AFxx
AFxx
FCxx
FCxx
ADxx
ADxx
FDxx
FDxx
ACxx
ACxx
FExx
FExx
CFxx
CFxx
FFxx
FFxx
AIxx
AIxx
AGxx
AGxx
FHxx
FHxx
AHxx
AHxx
FJxx
FJxx
ALxx
ALxx
FKxx
FKxx
AKxx
Doc. No. 3004, Rev. K
2
Patent Pending
Preliminary Information
ORDERING INFORMATION(CON’T)
Ordering Nominal Threshold Temperature
Part Number
Voltage (V)
Range
CAT810SEUR-T10
CAT810SEXR-T
CAT810SEXR-T10
CAT810TEUR-T
CAT810TEUR-T10
CAT810TEXR-T
CAT810TEXR-T10
CAT810ZEUR-T
CAT810ZEUR-T10
CAT810ZEXR-T
CAT810ZEXR-T10
2.93
2.93
2.93
3.08
3.08
3.08
3.08
2.32
2.32
2.32
2.32
-40˚C to 105˚C
-40˚C to 125˚C
-40˚C to 125˚C
-40˚C to 105˚C
-40˚C to 105˚C
-40˚C to 125˚C
-40˚C to 125˚C
-40˚C to 105˚C
-40˚C to 105˚C
-40˚C to 125˚C
-40˚C to 125˚C
Manual
Reset
No
No
No
No
No
No
No
No
No
No
No
RESET
Polarity
Push-Pull, Active HIGH
Push-Pull, Active HIGH
Push-Pull, Active HIGH
Push-Pull, Active HIGH
Push-Pull, Active HIGH
Push-Pull, Active HIGH
Push-Pull, Active HIGH
Push-Pull, Active HIGH
Push-Pull, Active HIGH
Push-Pull, Active HIGH
Push-Pull, Active HIGH
Package
3-pin, SOT23
3-pin, SC70
3-pin, SC70
3-pin, SOT23
3-pin, SOT23
3-pin, SC70
3-pin, SC70
3-pin, SOT23
3-pin, SOT23
3-pin, SC70
3-pin, SC70
CAT809, CAT810
Parts TOP Marking
per Reel
10K
3K
10K
3K
10K
3K
10K
3K
10K
3K
10K
AKxx
FLxx
FLxx
AJxx
AJxx
FMxx
FMxx
CGxx
CGxx
FNxx
FNxx
PIN DESCRIPTIONS
Pin Number
CAT809
1
2
—
CAT810
1
—
2
Name
GND
RESET
RESET
Description
Ground
Active LOW reset.
RESET
is asserted if V
CC
falls below the reset threshold
and remains low for at least 140ms after V
CC
rises above the reset threshold.
Active HIGH reset. RESET is asserted if V
CC
falls below the reset
threshold and remains high for at least 140ms after V
CC
rises above
the reset threshold.
Power supply voltage that is monitored.
3
3
V
CC
Patent Pending
3
Doc. No. 3004, Rev. K
CAT809, CAT810
ABSOLUTE MAXIMUM RATINGS*
Terminal Voltage (with respect to ground)
V
CC ...............................................................................
-0.3V to +6.0V
RESET,
RESET
(push-pull) .............. -65°C to +150°C
Input Current, V
CC
.............................................. 20mA
Output Current, RESET,
RESET .......................
20mA
Rate of Rise, V
CC ..............................................................
100V/µs
Continuous Power Dissipation
Derate 2.2mW/˚C above 70˚C (SC70) .......... 175mW
Derate 4mW/˚C above 70˚C (SOT23) .......... 320mW
ELECTRICAL CHARACTERISTICS
Preliminary Information
Operating Temperature
Range (SOT23) .............................. -40°C to +105°C
Operating Temperature
Range (SC70) ................................... -40°C to 125°C
Storage Temperature Range ............ -65°C to +150°C
Lead Soldering Temperature (10 sec) .............. 300°C
*COMMENT
Stresses above those listed under “Absolute Maximum Ratings” may
cause permanent damage to the device. These are stress ratings only,
and functional operation of the device at these or any other conditions
outside of those listed in the operational sections of this specification is not
implied. Exposure to any absolute maximum rating for extended periods
may affect device performance and reliability.
V
CC
= Full range, T
A
= -40°C to +105°C (SOT23) or T
A
=-40°C to +125°C (SC70) unless otherwise noted.
Typical values at T
A
= +25˚C are V
CC
=5V for the L/M/J versions, V
CC
=3.3V for the T/S versions, V
CC
=3V for the
R version and V
CC
=2.5V for the Z version.
Parameter
VCC Range
Symbol
Conditions
T
A
= 0˚C to +70˚C
T
A
= -40˚C to +105˚C (125˚C for SC70)
T
A
= -40˚C to +85˚C
Supply Current
I
CC
(+125˚C for SC70)
L Threshold
V
CC
< 5.5V, J/L/M
V
CC
< 3.6V, R/S/T/Z
Min
1.0
1.2
8
6
Typ
Max
5.5
5.5
20
15
35
30
4.56
4.50
4.40
4.31
4.25
4.16
3.93
3.89
3.80
3.04
3.00
2.92
2.89
2.85
2.78
2.59
2.55
2.50
2.28
2.25
2.21
2.32
2.63
2.93
3.08
4.00
4.38
4.63
4.70
4.75
4.86
4.45
4.50
4.56
4.06
4.10
4.20
3.11
3.15
3.23
2.96
3.00
3.08
2.66
2.70
2.76
2.35
2.38
2.45
Units
V
T
A
= +85˚C to +105˚C V
CC
< 5.5V, L/M
V
CC
< 3.6V, R/S/T/Z
T
A
= +25˚C
T
A
= -40˚C to +85˚C
T
A
= -40˚C to +125˚C
T
A
= +25˚C
M Threshold
T
A
= -40˚C to +85˚C
T
A
= -40˚C to +125˚C
T
A
= +25˚C
J Threshold
T
A
= -40˚C to +85˚C
T
A
= -40˚C to +125˚C
µA
Reset
Threshold
Voltage
S Threshold
T
A
= +25˚C
V
TH
T Threshold
V
T
A
= -40˚C to +85˚C
T
A
= -40˚C to +125˚C
T
A
= +25˚C
T
A
= -40˚C to +85˚C
T
A
= -40˚C to +125˚C
T
A
= +25˚C
R Threshold
T
A
= -40˚C to +85˚C
T
A
= -40˚C to +125˚C
T
A
= +25˚C
Z Threshold
T
A
= -40˚C to +85˚C
T
A
= -40˚C to +125˚C
Doc. No. 3004, Rev. K
4
Patent Pending
Preliminary Information
ELECTRICAL CHARACTERISTICS
(continued)
CAT809, CAT810
V
CC
= Full range, T
A
= -40˚C to +105˚C (SOT23) or T
A
=-40˚C to +125˚C (SC70) unless otherwise noted. Typical
values at T
A
= +25˚C are V
CC
=5V for L/M/J versions, V
CC
=3.3V for T/S versions, V
CC
=3V for R version and
V
CC
=2.5V for Z version.
Parameter
Reset Threshold Tempco
V
CC
to Reset Delay (Note 2)
Reset Active Timeout Period
Reset Active Timeout Period
V
CC
= V
TH
to (V
TH
- 100mV)
T
A
= -40˚C to +85˚C
T
A
= +85˚C to +105˚C
V
CC
= V
TH
min, I
SINK
= 1.2mA
RESET
Output Voltage Low
(Push-pull, active LOW,
CAT809)
CAT809R/S/T/Z
V
OL
V
CC
= V
TH
min, I
SINK
= 3.2mA
CAT809J/L/M
V
CC
> 1.0V, I
SINK
= 50µA
V
CC
= V
TH
max, I
SOURCE
= 500µA
RESET
Output Voltage High
(Push-pull, active LOW,
CAT809)
CAT809R/S/T/Z
V
OH
V
CC
= V
TH
max, I
SOURCE
= 800µA
CAT809J/L/M
V
CC
> V
TH
max, I
SINK
= 1.2mA
RESET Output Voltage Low
(Push-pull, active HIGH,
CAT810)
RESET Output Voltage High
(Push-pull active HIGH,
CAT810)
V
OL
CAT810R/S/T/Z
V
CC
> V
TH
max, I
SINK
= 3.2mA
CAT810L/M
1.8V < V
CC
≤
V
TH
min, I
SOURCE
= 150µA
0.8V
CC
0.3
V
0.4
0.8V
CC
V
V
CC
- 1.5
0.3
V
0.4
140
100
Symbol
Conditions
Min
Typ
30
20
240
Max
Units
ppm/˚C
µs
560
840
0.3
ms
V
OH
V
Note 1: Production testing done at T
A
= +25˚C; limits over temperature guaranteed by design only.
Note 2:
RESET
output for the CAT809; RESET output for the CAT810
Patent Pending
5
Doc. No. 3004, Rev. K
stm32/stm8
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