CAT809, CAT810
3-Pin Microprocessor Power Supply Supervisors
FEATURES
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Precision monitoring of
DESCRIPTION
The CAT809 and CAT810 are
µP
supervisory circuits
that monitor power supplies in digital systems. The
CAT809 and CAT810 are direct replacements for the
MAX809 and MAX810 in applications operating over the
industrial temperature range.
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
2(TM)
used by Catalyst 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 CAT809 features a
RESET
push-pull output (active
LOW) and the CAT810 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
cc
levels as low as 1.0 V.
The CAT809/810 are fully specified over the industrial
temperature range (-40°C to 85°C) and are available in
compact 3-pin SOT23 and SC70 packages.
+5.0 V (
±
5%,
±
10%,
±
20%),
+3.3 V (
±
5%,
±
10%),
+3.0 V (
±
10%) and
+2.5 V (
±
5%) power supplies
- CAT809: Active LOW reset
- CAT810: Active HIGH reset
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Offered in two output configurations:
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Direct replacements for the MAX809 and
MAX810 in applications operating over the
industrial temperature range
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Reset valid down to V
CC
= 1.0 V
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6
µ
A power supply current
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Power supply transient immunity
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Available in SOT-23 and SC70 packages with
Sn or NiPdAu GREEN lead finish
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Industrial temperature range: -40°C to +85°C
°
°
APPLICATIONS
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Computers
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Servers
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Laptops
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Cable modems
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Wireless communications
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Embedded control systems
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White goods
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Power meters
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Intelligent instruments
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PDAs and handheld equipment
THRESHOLD SUFFIX SELECTOR
Nominal 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
1
PIN CONFIGURATION
GND
1
CAT809
(CAT810)
RESET 2
(RESET)
3
VCC
3-Lead SOT23
3-Lead SC70
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Doc. No. 3004, Rev. Q
CAT809, CAT810
ORDERING INFORMATION
Prefix
CAT
Device #
809
Suffix
S
TBI
GT10
Company ID
Device Type
809: Push-Pull / Active Low Output
810: Push-Pull / Active High Output
Trip Level
L: 4.63V
M: 4.38V
J: 4.00V
T: 3.08V
S: 2.93V
R: 2.63V
Z: 2.32V
Package Type
EUR: SOT-23
TBI: SOT-23 Green
EXR: SC70
SDI: SC70 Green
Parts per Reel
T3: 3K units
T10: 10K units
GT3: 3K units (NiPdAu Lead Finish)*
GT10: 10K units (NiPdAu Lead Finish)*
The device shown in the examples (CAT809STBI-GT10) has an Active Low, Push-Pull output; a trip level of 2.85V to 3.00V and is provided in
the Green SOT-23 package with a NiPdAu lead finish on tape and reel with 10,000 units.
* NiPdAu is a Lead Finish Option on the Green Packages only. Unless indicated with the “G”, green packages are shipped with a Sn Matte
Lead Finish.
TOP MARKING
Parts and
Threshold
CAT809L
CAT809M
CAT809J
CAT809T
CAT809S
CAT809R
CAT809Z
CAT810L
CAT810M
CAT810J
CAT810T
CAT810S
CAT810R
CAT810Z
SOT-23 Green
Sn Matte Lead
Finish
(1)
DBYM
DCYM
CAYM
DFYM
DEYM
DDYM
DGYM
CKYM
CLYM
CJYM
CPYM
CNYM
CMYM
CRYM
NSYM
NRYM
SOT-23 Green
NiPdAu Lead
Finish
(1) (2)
SC70 Green Sn
Matte Lead
Finish
(1)
GA_
GB_
GG_
GE_
GD_
GC_
GF_
GH_
GJ_
GP_
GM_
GL_
GK_
GN_
NS_
NR_
SC70 Green
NiPdAu Lead
Finsish
(1) (2)
SOT23
(1)
SC70
(1)
FA_
FB_
FG_
FE_
FD_
FC_
FF_
FH_
FJ_
FP_
FM_
FL_
FK_
FN_
AAYM
ABYM
CWYM
ACYM
ADYM
AFYM
CFYM
AGYM
AHYM
AIYM
AJYM
AKYM
ALYM
CGYM
Notes
1) The “YM” in the SOT-23 package marking indicates the Year and Month of production and the “_” in the SC70 package marking indicates
the assembly location.
2) All NiPdAu devices will be marked to indicate product type and package. Threshold and full part numbers will be provided on box and reel
labels as well as all Shipping documents.
Doc. No. 3004, Rev. Q
2
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
CAT809, CAT810
PIN DESCRIPTIONS
Pin Number
CAT809
1
2
—
CAT810
1
—
2
GND
RESET
RESET
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.
Name
Description
3
3
V
CC
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
3
Doc No. 3004, Rev. Q
CAT809, CAT810
Operating Temperature Range ........... -40°C to +85°C
Storage Temperature Range ............ -65°C to +105°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.
ABSOLUTE MAXIMUM RATINGS*
Any pin with respect to ground .......... -0.3 V to +6.0 V
Input Current, V
CC
............................................. 20 mA
Output Current, RESET,
RESET ......................
20 mA
Rate of Rise, V
CC .............................................................
100 V/µs
Continuous Power Dissipation
Derate 2.2mW/˚C above 70˚C (SC70) ......... 175 mW
Derate 4mW/˚C above 70˚C (SOT23) ......... 320 mW
ELECTRICAL 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
VCC Range
Symbol
Conditions
T
A
= 0°C to +70°C
T
A
= -40°C to +85°C
Supply Current
I
CC
T
A
= -40˚C to +85˚C
V
CC
< 5.5 V, J/L/M
V
CC
< 3.6 V, R/S/T/Z
T
A
= +25˚C
T
A
= -40˚C to +85˚C
T
A
= +25˚C
T
A
= -40˚C to +85˚C
T
A
= +25˚C
J Threshold
T
A
= -40˚C to +85˚C
T
A
= +25˚C
T
A
= -40˚C to +85˚C
S Threshold
T
A
= +25˚C
T
A
= -40˚C to +85˚C
T
A
= +25˚C
R Threshold
T
A
= -40˚C to +85˚C
T
A
= +25˚C
T
A
= -40˚C to +85˚C
4.56
4.50
4.31
4.25
3.93
3.89
3.04
3.00
2.89
2.85
2.59
2.55
2.28
2.25
2.32
2.63
2.93
3.08
4.00
4.38
Min
1.0
1.2
8
6
4.63
Typ
Max
5.5
5.5
20
15
4.70
4.75
4.45
4.50
4.06
4.10
3.11
3.15
2.96
3.00
2.66
2.70
2.35
2.38
Units
V
µA
L Threshold
M Threshold
Reset
Threshold
Voltage
V
TH
T Threshold
V
Z Threshold
Doc. No. 3004, Rev. Q
4
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
CAT809, CAT810
ELECTRICAL CHARACTERISTICS
(continued)
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
L/M/J versions, V
CC
= 3.3 V for T/S versions, V
CC
= 3 V for R version and V
CC
= 2.5 V for Z version.
Parameter
Reset Threshold Tempco
V
CC
to Reset Delay (Note 2)
Reset Active Timeout Period
V
CC
= V
TH
to (V
TH
- 100 mV)
T
A
= -40˚C to +85˚C
V
CC
= V
TH
min, I
SINK
= 1.2 mA
RESET
Output Voltage Low
(Push-pull, active LOW,
CAT809)
CAT809R/S/T/Z
V
OL
V
CC
= V
TH
min, I
SINK
= 3.2 mA
CAT809J/L/M
V
CC
> 1.0 V, I
SINK
= 50
µA
V
CC
= V
TH
max, I
SOURCE
= 500
µA
RESET
Output Voltage High
(Push-pull, active LOW,
CAT809)
V
OH
CAT809R/S/T/Z
V
CC
= V
TH
max, I
SOURCE
= 800
µA
CAT809J/L/M
V
CC
> V
TH
max, I
SINK
= 1.2 mA
RESET Output Voltage Low
(Push-pull, active HIGH,
CAT810)
RESET Output Voltage High
(Push-pull active HIGH,
CAT810)
CAT810R/S/T/Z
V
OL
V
CC
> V
TH
max, I
SINK
= 3.2 mA
CAT810J/L/M
V
OH
1.8 V < V
CC
≤
V
TH
min, I
SOURCE
= 150
µA
0.8 V
CC
V
0.4
V
CC
- 1.5
0.3
V
0.8 V
CC
V
0.4
0.3
140
Symbol
Conditions
Min
Typ
(1)
30
20
240
Max
Units
ppm/˚C
µs
400
0.3
ms
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
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
5
Doc No. 3004, Rev. Q
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