H
EE
GEN FR
ALO
CAT809, CAT810
3-Pin Microprocessor Power Supply Supervisors
LE
A D F R E ETM
FEATURES
■ Precision monitoring of
■ 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
MAX810 in applications operating over the
industrial temperature range
■ Reset valid down to VCC = 1.0 V
■ 6 µA power supply current
■ Offered in two output configurations:
■ Power supply transient immunity
- CAT809: Active LOW reset
- CAT810: Active HIGH reset
■ Compact 3-pin SOT23 and SC70 packages
■ Industrial temperature range: -40˚C to +85˚C
APPLICATIONS
■ Computers
■ Embedded control systems
■ Servers
■ White goods
■ Laptops
■ Power meters
■ Cable modems
■ Intelligent instruments
■ Wireless communications
■ 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.
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).
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, AE2(TM) used by Catalyst Semiconductor,
makes it possible to offer any custom reset threshold
value. Seven industry standard threshold levels are
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 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.
PIN CONFIGURATION
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
© 2004 by Catalyst Semiconductor, Inc., Patent Pending
Characteristics subject to change without notice
GND
1
CAT809
(CAT810)
3
VCC
RESET 2
(RESET)
3-Lead SOT23
3-Lead SC70
1
Doc. No. 3004, Rev. S
CAT809, CAT810
ORDERING INFORMATION
Ordering Part Number
RESET Polarity
Package
Parts per Reel
CAT809_EUR-T
Push-Pull RESET
3-pin, SOT23
3k
CAT809_EUR-T10
Push-Pull RESET
3-pin, SOT23
10k
CAT809_TBI-T
Push-Pull RESET
3-pin, SOT23 Green
3k
CAT809_TBI-T10
Push-Pull RESET
3-pin, SOT23 Green
10k
CAT809_EXR-T
Push-Pull RESET
3-pin, SC70
3k
CAT809_EXR-T10
Push-Pull RESET
3-pin, SC70
10k
CAT809_SDI-T
Push-Pull RESET
3-pin, SC70 Green
3k
CAT809_SDI-T10
Push-Pull RESET
3-pin, SC70 Green
10k
CAT810_EUR-T
Push-Pull RESET
3-pin, SOT23
3k
CAT810_EUR-T10
Push-Pull RESET
3-pin, SOT23
10k
CAT810_TBI-T
Push-Pull RESET
3-pin, SOT23 Green
3k
CAT810_TBI-T10
Push-Pull RESET
3-pin, SOT23 Green
10k
CAT810_EXR-T
Push-Pull RESET
3-pin, SC70
3k
CAT810_EXR-T10
Push-Pull RESET
3-pin, SC70
10k
CAT810_SDI-T
Push-Pull RESET
3-pin, SC70 Green
3k
CAT810_SDI-T10
Push-Pull RESET
3-pin, SC70 Green
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
SOT23 Green
SC70
SC70 Green
CAT809L
AAYM
DBYM
FA_
GA_
CAT809M
ABYM
DCYM
FB_
GB_
CAT809J
CWYM
DAYM
FG_
GG_
CAT809T
ACYM
DFYM
FE_
GE_
CAT809S
ADYM
DEYM
FD_
GD_
CAT809R
AFYM
DDYM
FC_
GC_
CAT809Z
CFYM
DGYM
FF_
GF_
CAT810L
AGYM
CKYM
FH_
GH_
CAT810M
AHYM
CLYM
FJ_
GJ_
CAT810J
AIYM
CJYM
FP_
GP_
CAT810T
AJYM
CPYM
FM_
GM_
CAT810S
AKYM
CNYM
FL_
GL_
CAT810R
ALYM
CMYM
FK_
GK_
CAT810Z
CGYM
CRYM
FN_
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
Name
Description
1
GND
Ground
2
—
RESET
Active LOW reset. RESET is asserted if VCC falls below the reset threshold
and remains low for at least 140ms after VCC rises above the reset threshold.
—
2
RESET
Active HIGH reset. RESET is asserted if VCC falls below the reset
threshold and remains high for at least 140ms after VCC rises above
the reset threshold.
3
3
VCC
Power supply voltage that is monitored.
CAT809
CAT810
1
Patent Pending
3
Doc. No. 3004, Rev. S
CAT809, CAT810
Operating Temperature Range ........... -40°C to +85°C
ABSOLUTE MAXIMUM RATINGS*
Storage Temperature Range ............ -65°C to +105°C
Any pin with respect to ground .......... -0.3 V to +6.0 V
Lead Soldering Temperature (10 sec) .............. 300°C
Input Current, VCC ............................................. 20 mA
Output Current, RESET, RESET ...................... 20 mA
*COMMENT
Rate of Rise, VCC ............................................................. 100 V/µs
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.
Continuous Power Dissipation
Derate 2.2mW/˚C above 70˚C (SC70) ......... 175 mW
Derate 4mW/˚C above 70˚C (SOT23) ......... 320 mW
ELECTRICAL CHARACTERISTICS
VCC = Full range, TA = -40°C to +85°C unless otherwise noted. Typical values at TA = +25˚C and VCC = 5 V for the
L/M/J versions, VCC = 3.3 V for the T/S versions, VCC = 3 V for the R version and VCC = 2.5 V for the Z version.
Parameter
Symbol
VCC Range
Supply Current
ICC
Conditions
5.5
TA = -40˚C to +85˚C
1.2
5.5
TA = -40˚C to +85˚C
J Threshold
Reset
T Threshold
VTH
S Threshold
R Threshold
Z Threshold
Doc. No. 3004, Rev. S
Max
1.0
M Threshold
Voltage
Typ
TA = 0˚C to +70˚C
L Threshold
Threshold
Min
VCC < 5.5 V, J/L/M
8
20
VCC < 3.6 V, R/S/T/Z
6
15
4.63
4.70
TA = +25˚C
4.56
TA = -40˚C to +85˚C
4.50
TA = +25˚C
4.31
TA = -40˚C to +85˚C
4.25
TA = +25˚C
3.93
TA = -40˚C to +85˚C
3.89
TA = +25˚C
3.04
TA = -40˚C to +85˚C
3.00
TA = +25˚C
2.89
TA = -40˚C to +85˚C
2.85
TA = +25˚C
2.59
TA = -40˚C to +85˚C
2.55
TA = +25˚C
2.28
TA = -40˚C to +85˚C
2.25
4
Units
V
µA
4.75
4.38
4.45
4.50
4.00
4.06
4.10
3.08
3.11
3.15
2.93
V
2.96
3.00
2.63
2.66
2.70
2.32
2.35
2.38
Patent Pending
CAT809, CAT810
ELECTRICAL CHARACTERISTICS (continued)
VCC = Full range, TA = -40˚C to +85˚C unless otherwise noted. Typical values at TA = +25˚C and VCC = 5 V for
L/M/J versions, VCC = 3.3 V for T/S versions, VCC = 3 V for R version and VCC = 2.5 V for Z version.
Parameter
Symbol
Conditions
Min
Reset Threshold Tempco
VCC to Reset Delay (Note 2)
VCC = VTH to (VTH - 100 mV)
Reset Active Timeout Period
TA = -40˚C to +85˚C
140
VCC = VTH min, ISINK = 1.2 mA
RESET Output Voltage Low
(Push-pull, active LOW,
CAT809)
VOH
20
µs
240
400
VCC = VTH max, ISOURCE = 800 µA
V
0.8 VCC
V
VCC - 1.5
VCC > VTH max, ISINK = 1.2 mA
0.3
CAT810R/S/T/Z
VOL
ms
0.3
CAT809R/S/T/Z
CAT809J/L/M
RESET Output Voltage Low
(Push-pull, active HIGH,
CAT810)
ppm/˚C
0.4
CAT809J/L/M
VCC = VTH max, ISOURCE = 500 µA
Units
30
VCC = VTH min, ISINK = 3.2 mA
VCC > 1.0 V, ISINK = 50 µA
RESET Output Voltage High
(Push-pull, active LOW,
CAT809)
Max
0.3
CAT809R/S/T/Z
VOL
Typ(1)
V
VCC > VTH max, ISINK = 3.2 mA
0.4
CAT810J/L/M
RESET Output Voltage High
(Push-pull active HIGH,
CAT810)
VOH
1.8 V < VCC ≤ VTH min, ISOURCE = 150 µA
0.8 VCC
V
Note 1: Production testing done at TA = +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. S
CAT809, CAT810
TYPICAL OPERATING CHARACTERISTICS
VCC = Full range, TA = -40˚C to +85˚C unless otherwise noted. Typical values at TA = +25˚C and VCC = 5 V for
L/M/J versions, VCC=3.3 V for T/S versions, VCC = 3 V for R version and VCC = 2.5 V for Z version.
SUPPLY CURRENT VS. TEMPERATURE
(NO LOAD, CAT8xxR/S/T/Z)
260
12
240
SUPPLY CURRENT (µA)
POWER-UP RESET TIMEOUT (mS)
POWER-UP RESET TIMEOUT
VS. TEMPERATURE
VCC=5V
220
200
VCC=2.5V
180
VCC=5.5V
10
8
VCC=3.6V
6
4
2
0
160
-50
0
50
100
-50
150
0
TEMPERATURE (˚C)
1.0002
NORMALIZED THRESHOLD
POWER-DOWN RESET DELAY (µS)
150
NORMALIZED RESET THRESHOLD
VS. TEMPERATURE
14
12
10
8
6
4
2
1
0.9998
0.9996
0.9994
0.9992
0.999
0.9988
0
50
100
150
0
TEMPERATURE (˚C)
Doc. No. 3004, Rev. S
100
TEMPERATURE (˚C)
POWER-DOWN RESET DELAY VS. TEMPERATURE
(CAT8xxR/S/T/Z)
0
-50
50
20
40
60
80
100
120
TEMPERATURE (˚C)
6
Patent Pending
CAT809, CAT810
DETAILED DESCRIPTIONS
RESET TIMING
The reset signal is asserted LOW for the CAT809 and HIGH for the CAT810 when the power supply voltage falls below
the threshold trip voltage and remains asserted for at least 140ms after the power supply voltage has risen above the
threshold.
Threshold
Voltage
Power 5V
Supply
Voltage 0V
RESET
Reset Timeout Period
140ms
minimum
5V
CAT809
0V
5V
RESET
CAT810
0V
FIGURE 1. RESET TIMING DIAGRAM
VCC TRANSIENT RESPONSE
The CAT809/810 protect µPs against brownout failure. Short duration transients of 4µsec or less and 100 mV
amplitude typically do not cause a false RESET.
Figure 2 shows the maximum pulse duration of negative-going VCC transients that do not cause a reset condition. As
the amplitude of the transient goes further below the threshold (increasing VTH - VCC), the maximum pulse duration
decreases. In this test, the VCC starts from an initial voltage of 0.5V above the threshold and drops below it by the
amplitude of the overdrive voltage (VTH - VCC).
TRANSIENT DURATION [µs)
30
TAMB = 25°C
25
20
15
CAT809Z
10
5
CAT809M
0
1
10
100
1000
RESET OVERDRIVE VTH - VCC [mV]
FIGURE 2. Maximum Transient Duration Without Causing a Reset Pulse vs. Reset Comparator Overdrive
Patent Pending
7
Doc. No. 3004, Rev. S
CAT809, CAT810
VALID RESET WITH VCC UNDER 1.0 V
To ensure that the CAT809 RESET pin is in a known state when VCC is under 1.0 V, a 100 kΩ pull-down resistor
between RESET pin and GND is recommended; the value is not critical. For the CAT810, a pull-up resistor from
RESET pin to VCC is needed.
Power
Supply
Power
Supply
VCC
VCC
CAT810
CAT809
100kΩ
RESET
RESET
100kΩ
GND
GND
FIGURE 3. RESET Valid with VCC Under 1.0 V
FIGURE 4. RESET Valid with VCC Under 1.1 V
BI-DIRECTIONAL RESET PIN INTERFACING
The CAT809/810 can interface with µP/µC bi-directional reset pins by connecting a 4.7 kΩ resistor in series with the
CAT809/810 reset output and the µP/µC bi-directional reset pin.
BUF
Power
Supply
Buffered
RESET
VCC
CAT809
µP
4.7kΩ
RESET
INPUT
RESET
(For example: 68HC11)
GND
GND
Bi-directional I/O Pin
FIGURE 5. Bi-directional Reset Pin Interfacing
Doc. No. 3004, Rev. S
8
Patent Pending
CAT809, CAT810
OTHER SUPERVISORY PRODUCTS
Function
CAT1161/3
CAT1162
CAT809
CAT810
CAT811
8-pin
DIP and SOIC
8-pin
DIP and SOIC
3-pin
SOT23 and
SC70
3-pin
SOT23 and
SC70
4-pin
SOT143
CAT812
With 16k Bit Serial EEPROM Memory
Watchdog Timer
Manual Reset Input
Active Low Reset
Active High Reset
Dual Polarity Reset Outputs
Package
Patent Pending
9
4-pin
SOT143
Doc. No. 3004, Rev. S
CAT809, CAT810
PACKAGE INFORMATION
Inches
Plastic SOT-23 (3-Pin)
Min
Millimeters
Max
Min
Max
Plastic SOT-23 (3-Pin)
B
E
H
A
0.0350
0.0441
0.89
1.12
A1
0.0005
0.0039
0.013
0.10
B
0.0146
0.0197
0.37
0.50
c
0.0033
0.0071
0.085
0.18
D
0.1102
0.1197
2.80
3.04
E
0.0472
0.0551
1.20
1.40
e
0.0350
0.0406
0.89
1.03
e1
0.0701
0.0807
1.78
2.05
H
0.0827
0.1039
2.10
2.64
∝
0°
8°
0°
8°
L
0.0083
0.0161
0.275
0.41
L1
0.0160
0.0270
0.275
0.685
NOTE:
1. THIS PART IS COMPLIANT WITH JEDEC
SPECIFICATION TO-236AB
2. DIE IS FACE UP FOR MOLD AND TRIM/FORM
3. DIMENSIONS ARE EXCLUSIVE OF MOLD
FLASH AND METAL BURR
e
e1
D
E
c
A
∝
A1
L1
Doc. No. 3004, Rev. S
10
L
Patent Pending
CAT809, CAT810
PACKAGE INFORMATION
Inches
SC-70 Package (3-Lead)
Min
Millimeters
Max
Min
Max
Plastic SC-70 (3-Pin)
e
b
A
0.0315
0.0433
0.80
1.10
A1
0.0000
0.0039
0.00
0.10
A2
0.0315
0.0394
0.80
1.00
b
0.0059
0.00118
0.15
0.30
c
0.0035
0.0071
0.09
0.18
D
0.0709
0.0866
1.80
2.20
E
0.0453
0.0531
1.15
1.35
E1
0.0709
0.0945
1.80
2.40
e
2
1
E
0.00255 BSC
0.65BSC
L
0.0102
0.0181
0.26
0.46
L1
0.0108
0.0226
0.275
0.575
NOTE:
1. THIS PART IS COMPLIANT WITH EIAJ
SPECIFICATION SC-70
E1
3
2. DIE IS FACE UP FOR MOLD. DIE IS FACING
DOWN FOR TRIM/FORM
3. DIMENSIONS ARE EXCLUSIVE OF MOLD
FLASH AND METAL BURR
D
E
A2
A
c
A1
Patent Pending
L1
11
L
Doc. No. 3004, Rev. S
CAT809, CAT810
REVISION HISTORY
Date
10/29/2003
Rev.
N
10/30/2003
3/10/2004
O
P
Updated Power Up Reset Timeout vs. Temperature curve
Corrected temperature range
Updated Description
Updated Ordering Information
Updated Absolute Maximum Ratings
Updated Electrical Characteristics
03/23/2004
Q
3/25/2004
R
5/10/2004
S
Updated Description
Updated Ordering Information
Updated Absolute Maximum Ratings
Updated Electrical Characteristics
Updated Typical Operating Characteristics
Updated Package Information
Changed Preliminary designation to Final
Updated Max Reset Active Timout Period in Electrical Characteristics
Updated package drawings
Updated top marking table
Doc. No. 3004, Rev. S
Reason
Updated VCC Transient Response text and Figure 2
12
Patent Pending
Copyrights, Trademarks and Patents
Trademarks and registered trademarks of Catalyst Semiconductor include each of the following:
DPP ™
AE2 ™
Catalyst Semiconductor has been issued U.S. and foreign patents and has patent applications pending that protect its products. For a complete list of patents
issued to Catalyst Semiconductor contact the Company’s corporate office at 408.542.1000.
CATALYST SEMICONDUCTOR MAKES NO WARRANTY, REPRESENTATION OR GUARANTEE, EXPRESS OR IMPLIED, REGARDING THE SUITABILITY OF ITS
PRODUCTS FOR ANY PARTICULAR PURPOSE, NOR THAT THE USE OF ITS PRODUCTS WILL NOT INFRINGE ITS INTELLECTUAL PROPERTY RIGHTS OR THE
RIGHTS OF THIRD PARTIES WITH RESPECT TO ANY PARTICULAR USE OR APPLICATION AND SPECIFICALLY DISCLAIMS ANY AND ALL LIABILITY ARISING
OUT OF ANY SUCH USE OR APPLICATION, INCLUDING BUT NOT LIMITED TO, CONSEQUENTIAL OR INCIDENTAL DAMAGES.
Catalyst Semiconductor products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or
other applications intended to support or sustain life, or for any other application in which the failure of the Catalyst Semiconductor product could create a
situation where personal injury or death may occur.
Catalyst Semiconductor reserves the right to make changes to or discontinue any product or service described herein without notice. Products with data sheets
labeled "Advance Information" or "Preliminary" and other products described herein may not be in production or offered for sale.
Catalyst Semiconductor advises customers to obtain the current version of the relevant product information before placing orders. Circuit diagrams illustrate
typical semiconductor applications and may not be complete.
Catalyst Semiconductor, Inc.
Corporate Headquarters
1250 Borregas Avenue
Sunnyvale, CA 94089
Phone: 408.542.1000
Fax: 408.542.1200
www.catalyst-semiconductor.com
Publication #:
Revison:
Issue date:
3004
S
5/10/04
Patent Pending
工商网监
湘ICP备2023018690号
