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CAT809, CAT810
3-Pin Microprocessor Power Supply Supervisors
FEATURES
s
Precision monitoring of
H
GEN
FR
ALO
EE
LE
A
D
F
R
E
E
TM
s
Direct replacements for the MAX809 and
+5.0 V (+/- 5%, +/- 10%, +/- 20%),
+3.3 V (+/- 5%, +/ 10%),
+3.0 V (+/- 10%) and
+2.5 V (+/- 5%) power supplies
s
Offered in two output configurations:
MAX810 in applications operating over the
industrial temperature range
s
Reset valid down to V
CC
= 1.0 V
s
6
µ
A power supply current
s
Power supply transient immunity
s
Compact 3-pin SOT23 and SC70 packages
s
Industrial temperature range: -40˚C to +85˚C
- CAT809: Active LOW reset
- CAT810: Active HIGH reset
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
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.
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
© 2004 by Catalyst Semiconductor, Inc., Patent Pending
Characteristics subject to change without notice
Doc. No. 3004, Rev. S
CAT809, CAT810
ORDERING INFORMATION
Ordering Part Number
CAT809_EUR-T
CAT809_EUR-T10
CAT809_TBI-T
CAT809_TBI-T10
CAT809_EXR-T
CAT809_EXR-T10
CAT809_SDI-T
CAT809_SDI-T10
CAT810_EUR-T
CAT810_EUR-T10
CAT810_TBI-T
CAT810_TBI-T10
CAT810_EXR-T
CAT810_EXR-T10
CAT810_SDI-T
CAT810_SDI-T10
RESET Polarity
Push-Pull
RESET
Push-Pull
RESET
Push-Pull
RESET
Push-Pull
RESET
Push-Pull
RESET
Push-Pull
RESET
Push-Pull
RESET
Push-Pull
RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Package
3-pin, SOT23
3-pin, SOT23
3-pin, SOT23 Green
3-pin, SOT23 Green
3-pin, SC70
3-pin, SC70
3-pin, SC70 Green
3-pin, SC70 Green
3-pin, SOT23
3-pin, SOT23
3-pin, SOT23 Green
3-pin, SOT23 Green
3-pin, SC70
3-pin, SC70
3-pin, SC70 Green
3-pin, SC70 Green
Parts per Reel
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
Insert threshold suffix (L, M, J, T, S, R or Z) into the blank position. Example: CAT809LTBI-T for 4.63 V.
TOP MARKING
SOT23
CAT809L
CAT809M
CAT809J
CAT809T
CAT809S
CAT809R
CAT809Z
CAT810L
CAT810M
CAT810J
CAT810T
CAT810S
CAT810R
CAT810Z
AAYM
ABYM
CWYM
ACYM
ADYM
AFYM
CFYM
AGYM
AHYM
AIYM
AJYM
AKYM
ALYM
CGYM
SOT23 Green
DBYM
DCYM
DAYM
DFYM
DEYM
DDYM
DGYM
CKYM
CLYM
CJYM
CPYM
CNYM
CMYM
CRYM
SC70
FA_
FB_
FG_
FE_
FD_
FC_
FF_
FH_
FJ_
FP_
FM_
FL_
FK_
FN_
SC70 Green
GA_
GB_
GG_
GE_
GD_
GC_
GF_
GH_
GJ_
GP_
GM_
GL_
GK_
GN_
Where YM stands for Year and Month for the SOT23 package and the blank is replaced by the assembly location for the SC70 package.
Doc. No. 3004, Rev. S
2
Patent Pending
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
Patent Pending
3
Doc. No. 3004, Rev. S
CAT809, CAT810
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
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.
V
µA
L Threshold
M Threshold
Reset
Threshold
Voltage
V
TH
T Threshold
V
Z Threshold
Doc. No. 3004, Rev. S
4
Patent Pending
微控制器 MCU
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