CAT803, CAT809, CAT810
3-Pin Microprocessor Power Supply
Supervisors
FeATureS
■
DESCRIPTIOn
The CAT803, CAT809, and CAT80 are supervisory
circuits that monitor power supplies in digital systems. The
CAT803, CAT809, and CAT80 are direct replacements
for the MAX803, MAX809 and MAX80 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 40 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 +5.0V, +3.3V, +3.0V and +2.5V
systems.
The CAT803 has an open-drain RESET output (active
LOW). The CAT803 requires a pull-up resistor on the
reset output.
The CAT809 features a push-pull RESET output (active
LOW) and the CAT80 features a push-pull RESET
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 .0V.
The CAT803, CAT809, and CAT80 are available in both
the compact 3-pin SOT-23 and SC70 packages.
Precision monitoring of
+5.0V (-5%, -10%, -20%),
+3.3V (-5%, -10%),
+3.0V (-10%) and
+2.5V (-5%) power supplies
Offered in three output configurations:
- CAT803: Open-Drain Active LOW reset
- CAT809: Push-Pull Active LOW reset
- CAT810: Push-Pull Active HIGH reset
Direct replacements for the MAX803, MAX809
and MAX810 in applications operating over the
industrial temperature range
reset valid down to V
CC
= 1.0V
6µA power supply current
Power supply transient immunity
Industrial temperature range: -40ºC to +85ºC
Available in RoHS-compliant SOT-23 and SC70
packages
■
■
■
■
■
■
■
APPLICATIOnS
■
■
■
■
■
■
■
■
■
■
Computers
Servers
Laptops
Cable modems
Wireless communications
embedded control systems
White goods
Power meters
Intelligent instruments
PDAs and handheld
equipment
for Ordering Information details, see page 11.
THRESHOLD SuffIX SELECTOR
nominal Threshold
Voltage
4.63V
4.38V
4.00V
3.08V
VCC
PIn COnfIGuRATIOn
3-Lead SOT23
3-Lead SC70
GND
1
Threshold Suffix
Designation
L
M
J
T
S
R
Z
RESET 2
(RESET)
(CAT803)
CAT809
(CAT810)
3
2.93V
2.63V
2.32V
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Doc. No. MD-3004, Rev. Y
CAT803, CAT809, CAT810
PIn DESCRIPTIOnS
Pin number
CAT803
2
CAT809 CAT810
2
—
GND
Ground
RESET Active LOW reset. RESET is asserted if V
CC
falls below the reset thresh-
old and remains low for at least 40ms after V
CC
rises above the reset
threshold.
RESET Active HIGH reset. RESET is asserted if V
CC
falls below the reset thresh-
old and remains high for at least 40ms after V
CC
rises above the reset
threshold.
V
CC
Power supply voltage that is monitored.
name
Description
—
—
2
3
3
3
BLOCK DIAGRAMS
V
CC
V
CC
V
CC
TOLERANCE
BIAS
+
–
DIGITAL
DELAY
RESET
VOLTAGE
REFERENCE
GND
CAT803
V
CC
V
CC
V
CC
TOLERANCE
BIAS
+
–
DIGITAL
DELAY
RESET
VOLTAGE
REFERENCE
GND
CAT809
V
CC
V
CC
V
CC
TOLERANCE
BIAS
+
–
DIGITAL
DELAY
RESET
VOLTAGE
REFERENCE
GND
CAT810
Doc. No. MD-3004, Rev. Y
2
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
CAT803, CAT809, CAT810
ABSOLuTE MAXIMuM RATInGS
(1)
Any pin with respect to ground
Input Current, V
CC
Output Current, RESET, RESET
Rate of Rise, V
CC
Continuous Power Dissipation
Derate 2.2mW/ºC above 70ºC (SC70)
Derate 4mW/ºC above 70ºC (SOT23)
Operating Temperature Range
Storage Temperature Range
Lead Soldering Temperature (0 sec)
note:
() 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.
-0.3V to +6.0V
20mA
20mA
00V/µs
75 mW
320 mW
-40ºC to +85ºC
-65ºC to +05ºC
300ºC
ELECTRICAL CHARACTERISTICS
V
CC
= Full range, T
A
= -40ºC to +85ºC unless otherwise noted. Typical values at T
A
= +25ºC and 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
V
CC
Range
Supply Current
Reset
Threshold
Voltage
I
CC
V
TH
Symbol
Conditions
T
A
= 0ºC to +70ºC
T
A
= -40ºC to +85ºC
T
A
= -40ºC to +85ºC
L Threshold
M Threshold
J Threshold
T Threshold
S Threshold
R Threshold
Z Threshold
V
CC
< 5.5V, J/L/M
V
CC
< 3.6V, R/S/T/Z
T
A
= +25ºC
T
A
= -40ºC to +85ºC
T
A
= +25ºC
T
A
= -40ºC to +85ºC
T
A
= +25ºC
T
A
= -40ºC to +85ºC
T
A
= +25ºC
T
A
= -40ºC to +85ºC
T
A
= +25ºC
T
A
= -40ºC to +85ºC
T
A
= +25ºC
T
A
= -40ºC to +85ºC
T
A
= +25ºC
T
A
= -40ºC to +85ºC
4.56
4.50
4.3
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
.0
.2
8
6
4.63
Typ
Max
5.5
5.5
20
5
4.70
4.75
4.45
4.50
4.06
4.0
3.
3.5
2.96
3.00
2.66
2.70
2.35
2.38
V
µA
units
V
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
3
Doc. No. MD-3004, Rev. Y
CAT803, CAT809, CAT810
ELECTRICAL CHARACTERISTICS
(continued)
V
CC
= Full range, T
A
= -40ºC to +85ºC unless otherwise noted. Typical values at T
A
= +25ºC and 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 Output Voltage Low
(Open-drain active LOW,
CAT803 and push-pull, ac-
tive LOW, CAT809)
RESET Output Voltage High
(Push-pull, active LOW,
CAT809)
RESET Output Voltage Low
(Push-pull, active HIGH,
CAT80)
RESET Output Voltage High
(Push-pull active HIGH,
CAT80)
V
OH
V
OL
V
OH
V
OL
T
D
T
R
V
CC
= V
TH
to (V
TH
- 00 mV)
T
A
= -40ºC to +85ºC
V
CC
= V
TH
min, I
SINK
= .2mA
CAT803R/S/T/Z, CAT809R/S/T/Z
V
CC
= V
TH
min, I
SINK
= 3.2mA
CAT803J/L/M, CAT809J/L/M
V
CC
> .0V, I
SINK
= 50µA
V
CC
= V
TH
max, I
SOURCE
= 500µA
CAT809R/S/T/Z
V
CC
= V
TH
max, I
SOURCE
= 800µA
CAT809J/L/M
V
CC
> V
TH
max, I
SINK
= .2mA
CAT80R/S/T/Z
V
CC
> V
TH
max, I
SINK
= 3.2mA
CAT80J/L/M
.8V < V
CC
V
TH
min,
I
SOURCE
= 50µA
0.8 V
CC
0.8 V
CC
V
CC
- .5
0.3
0.4
V
V
0.4
0.3
V
40
Symbol Conditions
Min
Typ
(1)
30
20
240
460
Max
units
ppm/ºC
µs
ms
V
notes:
() Production testing done at T
A
= +25ºC; limits over temperature guaranteed by design only.
(2) RESET output for the CAT809; RESET output for the CAT80.
Doc. No. MD-3004, Rev. Y
4
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
CAT803, CAT809, CAT810
TyPICAL OPERATInG CHARACTERISTICS
V
CC
= Full range, T
A
= -40ºC to +85ºC unless otherwise noted. Typical values at T
A
= +25ºC and 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.
POWER-UP RESET TIMEOUT
VS. TEMPERATURE
SUPPLY CURRENT VS. TEMPERATURE
(NO LOAD, CAT8xxR/S/T/Z)
12
POWER-UP RESET TIMEOUT (mS)
260
SUPPLY CURRENT (µA)
240
220
200
180
160
VCC=5V
10
8
6
4
2
0
-50
0
VCC=5.5V
VCC=3.6V
VCC=2.5V
-50
0
50
100
150
50
100
150
TEMPERATURE (˚C)
TEMPERATURE (˚C)
POWER-DOWN RESET DELAY VS. TEMPERATURE
(CAT8xxR/S/T/Z)
NORMALIZED RESET THRESHOLD
VS. TEMPERATURE
1.0002
1
0.9998
0.9996
0.9994
0.9992
0.999
0.9988
0
20
40
60
80
100
120
POWER-DOWN RESET DELAY (µS)
14
12
10
8
6
4
2
0
-50
0
50
100
150
TEMPERATURE (˚C)
NORMALIZED THRESHOLD
TEMPERATURE (˚C)
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
5
Doc. No. MD-3004, Rev. Y
Embedded System
京公网安备 11010802033920号
EEWORLD
