CAT812TEUS-T [CATALYST]
4-Pin Microprocessor Power Supply Supervisors; 4引脚微处理器电源监控
| 型号： | CAT812TEUS-T |
| 厂家： | 
CATALYST SEMICONDUCTOR |
| 描述： | 4-Pin Microprocessor Power Supply Supervisors |
| 文件： | 总11页 (文件大小：61K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
E
CAT811, CAT812
4-Pin Microprocessor Power Supply Supervisors
TM
FEATURES
ꢀ Precision monitoring of
+5.0 V (+/- 5%, +/- 10%, +/- 20%),
+3.3 V (+/- 5%, +/ 10%),
ꢀ Direct replacements for the MAX811 and
MAX812 in applications operating over the
industrial temperature range
+3.0 V (+/- 10%) and
+2.5 V (+/- 5%) power supplies
ꢀ Reset valid down to VCC = 1.0 V
ꢀ 6 µA power supply current
ꢀ Offered in two output configurations:
- CAT811: Active LOW reset
ꢀ Power supply transient immunity
ꢀ Compact 4-pin SOT143 package
ꢀ Industrial temperature range: -40˚C to +85˚C
- CAT812: Active HIGH reset
ꢀ Manual reset input
APPLICATIONS
ꢀ Computers
ꢀ Embedded control systems
ꢀ White goods
ꢀ Servers
ꢀ Laptops
ꢀ Power meters
ꢀ Cable modems
ꢀꢀ Wireless communications
ꢀ Intelligent instruments
ꢀ PDAs and handheld equipment
DESCRIPTION
The CAT811 and CAT812 are µP supervisory circuits
that monitor power supplies in digital systems. The
CAT811 and CAT812 are direct replacements for the
MAX811andMAX812inapplicationsoperatingoverthe
industrial temperature range; both have a manual reset
input.
offered to support +5.0 V, +3.3 V, +3.0 V and +2.5 V
systems.
The CAT811 features a RESET push-pull output (active
LOW) and the CAT812 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 Vcc
levels as low as 1.0 V.
Thesedevicesgeneratearesetsignal,whichisasserted
whilethepowersupplyvoltageisbelowapresetthreshold
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
The CAT811/812 are fully specified over the industrial
temperature range (-40˚C to 85˚C) and are available in
a compact 4-pin SOT143 package.
PIN CONFIGURATION
THRESHOLD SUFFIX SELECTOR
Nominal Threshold Threshold Suffix
Voltage
4.63V
4.38V
4.00V
3.08V
2.93V
2.63V
2.32V
Designation
GND
1
2
4
3
V
CC
L
M
J
CAT811
(CAT812)
T
S
R
Z
RESET
(RESET)
© 2004 by Catalyst Semiconductor, Inc., Patent Pending
Characteristics subject to change without notice
Doc. No. 3005, Rev. P
1
CAT811, CAT812
ORDERING INFORMATION
Ordering Part Number
RESET Polarity
Package
Parts per Reel
CAT811_EUS-T
CAT811_EUS-T10
CAT811_TBI-T
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
4-pin, SOT143
4-pin, SOT143
3k
10k
3k
4-pin, SOT143 Green
4-pin, SOT143 Green
4-pin, SOT143
CAT811_TBI-T10
CAT812_EUS-T
CAT812_EUS-T10
CAT812_TBI-T
10k
3k
4-pin, SOT143
10k
3k
4-pin, SOT143 Green
4-pin, SOT143 Green
CAT812_TBI-T10
10k
Insert threshold suffix (L, M, J, T, S, R or Z) into the blank position. Example: CAT811LTBI-T for 4.63 V, and lead-free SOT143 package.
TOP MARKING
SOT143
SOT143 Green
CAT811L
CAT811M
CAT811J
CAT811T
CAT811S
CAT811R
CAT811Z
CAT812L
CAT812M
CAT812J
CAT812T
CAT812S
CAT812R
CAT812Z
AMYM
ANYM
AZYM
APYM
AQYM
ARYM
AYYM
ASYM
ATYM
AUYM
AVYM
AWYM
AXYM
CIYM
DHYM
DJYM
CKYM
DLYM
DMYM
DNYM
CPYM
DRYM
DTYM
DUYM
DVYM
DWYM
DXYM
CYYM
Where YM stands for Year and Month.
Doc. No. 3005, Rev. P
Patent Pending
2
CAT811, CAT812
PIN DESCRIPTIONS
Pin Number
Name
Description
CAT811 CAT812
1
2
1
GND
Ground
—
RESET Active LOW reset. RESET is asserted if V
falls below the reset threshold
rises above the reset threshold.
CC
CC
and remains low for at least 140ms after V
—
2
3
RESET Active HIGH reset. RESET is asserted if V
falls below the reset
CC
threshold and remains high for at least 140ms after V
the reset threshold.
rises above
CC
3
MR
Manual Reset Input. A logic LOW on MR asserts RESET. RESET remains
active as long as MR is LOW and for 140ms after MR returns HIGH. The
active low input has an internal 20kΩ pull-up resistor. The input should be left
open if not used. It can be driven by TTL or CMOS logic or shorted to ground
by a switch.
4
4
V
CC
Power supply voltage that is monitored.
Patent Pending
Doc. No. 3005, Rev. P
3
CAT811, CAT812
Operating Temperature Range........... -40°C to +85°C
Storage Temperature Range ............ -65°C to +105°C
ABSOLUTE MAXIMUM RATINGS*
Any pin with respect to ground .......... -0.3 V to +6.0 V
Input Current, VCC ............................................. 20 mA
Output Current, RESET, RESET ...................... 20 mA
Rate of Rise, VCC ............................................................. 100 V/µs
Continuous Power Dissipation
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
outsideofthoselistedintheoperationalsectionsofthisspecificationisnot
implied. Exposure to any absolute maximum rating for extended periods
may affect device performance and reliability.
Derate 4mW/˚C above 70˚C (SOT143) ........ 320 mW
ELECTRICAL CHARACTERISTICS
V
CC
= Full range, T = -40°C to +85°C unless otherwise noted. Typical values at T = +25˚C and V = 5 V for the
A A CC
L/M/J versions, V = 3.3 V for the T/S versions, V =3 V for the R version and V = 2.5 V for the Z version.
CC
CC
CC
Parameter
Symbol
Conditions
Min
1.0
1.2
Typ
Max
5.5
Units
VCC Range
TA = 0˚C to +70˚C
V
TA = -40˚C to +85˚C
5.5
VCC < 5.5 V, J/L/M
VCC < 3.6 V, R/S/T/Z
TA = +25˚C
8
6
20
Supply Current
ICC
TA = -40˚C to +85˚C
µA
15
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
4.63
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
L Threshold
M Threshold
TA = -40˚C to +85˚C
TA = +25˚C
4.38
4.00
3.08
2.93
2.63
2.32
TA = -40˚C to +85˚C
TA = +25˚C
J Threshold
T Threshold
TA = -40˚C to +85˚C
TA = +25˚C
Reset
Threshold
Voltage
V
TA = -40˚C to +85˚C
TA = +25˚C
VTH
S Threshold
R Threshold
Z Threshold
TA = -40˚C to +85˚C
TA = +25˚C
TA = -40˚C to +85˚C
TA = +25˚C
TA = -40˚C to +85˚C
Doc. No. 3005, Rev. P
Patent Pending
4
CAT811, CAT812
(continued)
ELECTRICAL CHARACTERISTICS
= Full range, T = -40˚C to +85˚C unless otherwise noted. Typical values at T = +25˚C and V = 5 V for
CC
V
CC
A
A
L/M/J versions, V
= 3.3 V for T/S versions, V
= 3 V for R version and V
= 2.5 V for Z version.
CC
CC
CC
Parameter
Symbol
Conditions
Min
Typ(1) Max
Units
ppm/˚C
µs
Reset Threshold Tempco
VCC to Reset Delay (Note 2)
Reset Active Timeout Period
30
20
VCC = VTH to (VTH - 100 mV)
TA = -40˚C to +85˚C
140
240
400
0.3
ms
VCC = VTH min, ISINK = 1.2 mA
CAT811R/S/T/Z
RESET Output Voltage Low
(Push-pull, active LOW,
CAT811)
VOL
VCC = VTH min, ISINK = 3.2 mA
CAT811J/L/M
V
V
0.4
0.3
VCC > 1.0 V, ISINK = 50 µA
VCC = VTH max, ISOURCE = 500 µA
CAT811R/S/T/Z
0.8 VCC
RESET Output Voltage High
(Push-pull, active LOW,
CAT811)
VOH
VCC = VTH max, ISOURCE = 800 µA
CAT811J/L/M
VCC - 1.5
VCC > VTH max, ISINK = 1.2 mA
CAT812R/S/T/Z
0.3
0.4
RESET Output Voltage Low
(Push-pull, active HIGH,
CAT812)
V
V
VOL
VCC > VTH max, ISINK = 3.2 mA
CAT812J/L/M
RESET Output Voltage High
(Push-pull active HIGH,
CAT812)
VOH
1.8 V < VCC ≤ VTH min, ISOURCE = 150 µA
0.8 VCC
MR Minimum Pulse Width
tMR
10
µs
MR Glitch Immunity
Note 3
100
0.5
ns
MR to RESET Propagation
Delay
tMD
VIH
VIL
VIH
VIL
Note 2
µs
VCC > VTH (MAX), CAT811/812L/M/J
2.3 V
0.7VCC
10
0.8
MR Input Threshold
V
VCC > VIH (MAX), CAT811/812R/S/T/Z
0.25VCC
30
MR Pull-up Resistance
20
kΩ
Note 1: Production testing done at T = +25˚C; limits over temperature guaranteed by design only.
A
Note 2: RESET output for the CAT811; RESET output for the CAT812
Note 3: Glitches of 100 ns or less typically will not generate a reset pulse.
Patent Pending
Doc. No. 3005, Rev. P
5
CAT811, CAT812
TYPICAL OPERATING CHARACTERISTICS
V
= Full range, T = -40˚C to +85˚C unless otherwise noted. Typical values at T = +25˚C and V = 5 V for
CC
CC
A
A
L/M/J versions, V =3.3 V for T/S versions, V
CC
= 3 V for R version and V
= 2.5 V for Z version.
CC
CC
POWER-UP RESET TIMEOUT
VS. TEMPERATURE
SUPPLY CURRENT VS. TEMPERATURE
(NO LOAD, CAT8xxR/S/T/Z)
260
12
10
8
V =5.5V
CC
240
220
200
180
160
V
=5V
CC
V =3.6V
CC
6
4
V =2.5V
CC
2
0
-50
0
50
100
150
-50
0
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
14
12
10
8
0.9998
0.9996
0.9994
0.9992
0.999
0.9988
6
4
2
0
-50
0
50
100
150
0
20
40
60
80
100 120
TEMPERATURE (˚C)
TEMPERATURE (˚C)
Doc. No. 3005, Rev. P
Patent Pending
6
CAT811, CAT812
DETAILED DESCRIPTIONS
RESET TIMING
TheresetsignalisassertedLOWfortheCAT811andHIGHfortheCAT812whenthepowersupplyvoltage fallsbelow
the threshold trip voltage and remains asserted for at least 140ms after the power supply voltage has risen above the
threshold.
Threshold
Voltage
Power
Supply
Voltage
5V
0V
Reset Timeout Period
140ms
minimum
5V
0V
5V
0V
CAT811
CAT812
RESET
RESET
Figure 1. Reset Timing Diagram
V
CC
TRANSIENT RESPONSE
The CAT811/812 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).
30
T
= 25°C
AMB
25
20
15
10
5
CAT8xxZ
CAT8xxM
10
0
1
100
1000
RESET OVERDRIVE V - V [mV]
TH CC
Figure 2. Maximum Transient Duration Without Causing a Reset Pulse vs. Reset Comparator Overdrive
Patent Pending
Doc. No. 3005, Rev. P
7
CAT811, CAT812
VALID RESET WITH V
UNDER 1.0 V
CC
To ensure that the CAT811 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 CAT812, a pull-up resistor from
RESET pin to VCC is needed.
Power
Supply
Power
Supply
V
V
CC
CC
100kΩ
CAT812
CAT811
RESET
RESET
GND
100kΩ
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 CAT811/812 can interface with µP/µC bi-directional reset pins by connecting a 4.7 kΩ resistor in series with the
CAT811/812 reset output and the µP/µC bi-directional reset pin.
BUF
Buffered
RESET
Power
Supply
V
CC
CAT811
µP
4.7kΩ
(For example: 68HC11)
RESET
INPUT
RESET
GND
GND
Bi-directional I/O Pin
FIGURE 5. Bi-directional Reset Pin Interfacing
Doc. No. 3005, Rev. P
Patent Pending
8
CAT811, CAT812
OTHER SUPERVISORY PRODUCTS
Function
CAT1161/3
CAT1162
CAT809
CAT810
CAT811
CAT812
With 16k Bit Serial EEPROM Memory
Watchdog Timer
Manual Reset Input
Active Low Reset
Active High Reset
Dual Polarity Reset Outputs
Package
8-pin
DIP and SOIC
8-pin
DIP and SOIC
3-pin
SOT23 and
SC70
3-pin
SOT23 and
SC70
4-pin
SOT143
4-pin
SOT143
PACKAGE INFORMATION
Plastic SOT143 (4-Pin)
2.05 MAX
1.78 MIN
2.64 MAX
2.10 MIN
0.51 MAX
0.37 MIN
0.20
0.89 MAX
0.76 MIN
1.40 MAX
1.20 MIN
3.04 MAX
2.80 MIN
0.18 MAX
0.085 MIN
0.94 MAX
0.88 MIN
1.12 MAX
0.89 MIN
0.20
GAUGE PLANE
0.10 MAX
0.013 MIN
0.54 REF
0.41 MAX
0.21 MIN
Patent Pending
Doc. No. 3005, Rev. P
9
CAT811, CAT812
REVISION HISTORY
Date
Rev.
L
Reason
10/22/03
12/22/2003
Updated Ordering Information
Updated Features
M
Replaced power-up reset timeout vs. temperature graph
with updated one
Relaced VCC Transient Response graph with updated
one
3/22/04
N
Updated Features
Updated Description
Updated Ordering Information
Added Top Markings
Updated Absolute Maximum Ratings
Updated Electrical Characteristics
Updated Detailed Description
Changed Preliminary designation to Final
Updated Top Markings
3/25/2004
3/25/2004
O
P
Updated Electrical Characteristics (Reset Active
Timeout Period Max)
Corrected Pin Configure diagram
Doc. No. 3005, Rev. P
Patent Pending
10
Copyrights, Trademarks and Patents
Trademarks and registered trademarks of Catalyst Semiconductor include each of the following:
2
DPP ™
AE ™
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
Publication #: 3005
Revison:
Issue date:
Type:
P
3/25/04
Final
www.catalyst-semiconductor.com
Patent Pending
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