CAT811REUS-T10 [ONSEMI]
1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO4, PLASTIC, SOT-143, 4 PIN;
| 型号： | CAT811REUS-T10 |
| 厂家： | 
ONSEMI |
| 描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO4, PLASTIC, SOT-143, 4 PIN 输入元件 光电二极管 |
| 文件： | 总9页 (文件大小：110K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
CAT811, CAT812
4-Pin Microprocessor
Power Supply Supervisors
with Manual Reset
Description
The CAT811 and CAT812 are microprocessor supervisory circuits
that monitor power supplies. The CAT811 and CAT812 are direct
replacements for the MAX811 and MAX812 in applications operating
over the industrial temperature range; both have a manual reset input.
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, Analog EEPROM used by
ON 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.
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SOT−143
BI SUFFIX
CASE 527AF
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.
The CAT811/812 are fully specified over the industrial temperature
range (−40°C to 85°C) and are available in a compact 4−pin SOT−143
package.
PIN CONFIGURATION
1
4
V
CC
GND
2
3
MR
RESET
Features
• Precision Monitoring of
+5.0 V ( 5%, 10%, 20%),
+3.3 V ( 5%, 10%),
+3.0 V ( 10%) and
(Top View)
MARKING DIAGRAM
+2.5 V ( 5%) Power Supplies
• Manual Reset Input
• Offered in Two Output Configurations: CAT811: Active LOW Reset
CAT812: Active HIGH Reset
XXXMG
G
• Direct Replacements for the MAX811 and MAX812 in Applications
Operating over the Industrial Temperature Range
1
XXX
M
G
= Specific Device Code
= Month Code
= Pb−Free Package
• Reset Valid down to V = 1.0 V
CC
• 6 mA Power Supply Current
(*Note: Microdot may be in either location)
• Power Supply Transient Immunity
• Available in SOT−143 Packages with Sn or NiPdAu Green Lead
Finishes
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 9 of this data sheet.
• Industrial Temperature Range: −40°C to +85°C
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
Applications
• Computers, Servers, Laptops and Cable Modems
• Wireless Communications
• Embedded Control Systems
• White Goods, Power Meters
• Intelligent Instruments
• PDAs and Handheld Equipment
©
Semiconductor Components Industries, LLC, 2012
1
Publication Order Number:
October, 2012 − Rev. 2
CAT811/D
CAT811, CAT812
Table 1. THRESHOLD SUFFIX SELECTOR DESCRIPTION
Nominal Threshold Voltage
Threshold Suffix Designation
4.63 V
4.38 V
4.00 V
3.08 V
2.93 V
2.63 V
2.32 V
L
M
J
T
S
R
Z
Table 2. PIN DESCRIPTION
Pin Number
CAT811
CAT812
Pin Name
GND
Description
1
2
1
Ground.
−
RESET
Active LOW reset. RESET is asserted if V falls below the reset threshold and re-
CC
mains low for at least 140 ms after V rises above the reset threshold.
CC
−
2
3
RESET
MR
Active HIGH reset. RESET is asserted if V falls below the reset threshold and re-
CC
mains high for at least 140 ms after V rises above the reset threshold.
CC
3
Manual Reset Input. A logic LOW on MR asserts RESET. RESET remains active as
long as MR is LOW and for 140 ms after MR returns HIGH. The active low input has
an internal 20 kW pull−up resistor. The input should be left open if not used.
4
4
V
CC
Power supply voltage that is monitored.
V
CC
MR
RESET
&
DIGITAL
DELAY
V
CC
+
–
TOLERANCE
BIAS
V
CC
RESET
VOLTAGE
REFERENCE
CAT811
GND
V
CC
MR
RESET
&
DIGITAL
DELAY
V
CC
+
–
TOLERANCE
BIAS
V
CC
RESET
VOLTAGE
REFERENCE
CAT812
GND
Figure 1. Block Diagrams
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2
CAT811, CAT812
Table 3. ABSOLUTE MAXIMUM RATINGS
Parameters
Ratings
Units
V
Any pin with respect to ground
Input Current, V
−0.3 to +6.0
20
20
mA
CC
Output Current RESET, RESET
Rate of Raise, V
mA
100
320
V/ms
mW
CC
Continuous Power Dissipations
Derate 4 mW/°C above +70°C (SOT−143)
Storage Temperature Range
−65 to +105
−40 to +85
+300
°C
°C
°C
Operating Ambient Temperature Range
Lead Soldering Temperature (10 seconds)
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
Table 4. ELECTRICAL 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 the L/M/J versions,
CC
A
A
CC
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
Range
Symbol
Conditions
T = 0°C to +70°C
Min
1.0
1.2
Typ
Max
5.5
Units
V
V
CC
A
T = −40°C to +85°C
A
5.5
Supply Current
I
T = −40°C to +85°C
A
V < 5.5 V, J/L/M
CC
8
6
20
mA
CC
V
CC
< 3.6 V, R/S/T/Z
15
Reset Threshold
Voltage
V
TH
L Threshold
M Threshold
J Threshold
T Threshold
S Threshold
R Threshold
Z Threshold
T = +25°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
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
V
A
T = −40°C to +85°C
A
T = +25°C
A
4.38
4.00
3.08
2.93
2.63
2.32
T = −40°C to +85°C
A
T = +25°C
A
T = −40°C to +85°C
A
T = +25°C
A
T = −40°C to +85°C
A
T = +25°C
A
T = −40°C to +85°C
A
T = +25°C
A
T = −40°C to +85°C
A
T = +25°C
A
T = −40°C to +85°C
A
Reset Threshold
Tempco
30
20
ppm/°C
ms
V
to Reset Delay
(Note 3)
V = V to (V − 100 mV)
CC TH TH
CC
Reset Active
Timeout Period
T = −40°C to +85°C
A
140
240
400
ms
1. Production testing done at T = +25°C; limits over temperature guaranteed by design only.
A
2. Glitches of 100 ns or less typically will not generate a reset pulse.
3. RESET output for the CAT811; RESET output for the CAT812.
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3
CAT811, CAT812
Table 4. ELECTRICAL 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 the L/M/J versions,
CC
A
A
CC
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
Typ
Max
0.3
0.4
0.3
Units
RESET Output
Voltage Low
(Push−pull, active
LOW, CAT811)
V
OL
V
= V , I
= 1.2 mA CAT811R/S/T/Z
, I = 3.2 mA CAT811J/L/M
TH min SINK
V
CC
TH min SINK
V
= V
CC
V
CC
> 1.0 V, I
= 50 mA
SINK
RESET Output
Voltage High
(Push−pull, active
LOW, CAT811)
V
0.8V
V
V
V
V
= V
, I
= 500 mA CAT811R/S/T/Z
OH
CC
CC
TH max SOURCE
V
= V
, I
= 800 mA CAT811J/L/M
V
CC
− 1.5
CC
TH max SOURCE
RESET Output
Voltage Low
(Push−pull, active
HIGH, CAT812)
V
V
> V , I
= 1.2 mA CAT812R/S/T/Z
, I = 3.2 mA CAT812J/L/M
TH max SINK
0.3
0.4
OL
CC
TH max SINK
V
> V
CC
RESET Output
Voltage High
V
OH
1.8 V < V ≤ V
, I
= 150 mA
0.8V
CC
V
CC
TH min SOURCE
(Push−pull active
HIGH, CAT812)
MR Minimum Pulse
Width
t
t
10
ms
MR
MR Glitch Immunity
(Note 2)
(Note 3)
100
0.5
ns
MR to RESET
Propagation Delay
ms
MD
MR Input Threshold
V
IH
V
CC
> V , CAT811/812L/M/J
TH (MAX)
2.3V
V
V
IL
0.8
V
IH
V
CC
> V , CAT811/812R/S/T/Z
IH (MAX)
0.7V
CC
V
IL
0.25V
75
CC
MR Pull−up
Resistance
10
20
kW
1. Production testing done at T = +25°C; limits over temperature guaranteed by design only.
A
2. Glitches of 100 ns or less typically will not generate a reset pulse.
3. RESET output for the CAT811; RESET output for the CAT812.
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4
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 the L/M/J versions,
CC
A
A
CC
V
CC
= 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
260
12
10
8
240
220
200
V
CC
= 5.5 V
V
CC
= 5 V
V
CC
= 3.6 V
V
= 2.5 V
6
CC
4
180
160
2
0
−50
0
50
100
150
−50
0
50
TEMPERATURE (°C)
100
150
TEMPERATURE (°C)
Figure 2. Power−Up Reset Timeout vs.
Figure 3. Supply Current vs. Temperature
(No Load, CAT8xxR/S/T/Z)
Temperature
14
12
10
8
1.0002
1.0000
0.9998
0.9996
0.9994
0.9992
6
4
0.9990
0.9988
2
0
−50
0
50
100
150
0
20
40
60
80
100
120
TEMPERATURE (°C)
TEMPERATURE (°C)
Figure 4. Power−Down Reset Delay vs.
Figure 5. Normalized Reset Threshold vs.
Temperature
Temperature (CAT8xxR/S/T/Z)
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5
CAT811, CAT812
DETAILED DESCRIPTION
Reset Timing
The reset signal is asserted LOW for the CAT811 and HIGH for the CAT812 when the power supply voltage falls below the
threshold trip voltage and remains asserted for at least 140 ms after the power supply voltage has risen above the threshold.
Threshold
Voltage
5 V
V
CC
0 V
Reset
Timeout Period
140 ms
minimum
5 V
0 V
CAT811 RESET
V
CC
RESET
CAT812
0 V
Figure 6. Reset Timing Diagram
Valid Reset with VCC under 1.0 V
VCC Transient Response
The CAT811/812 protect mPs against brownout failure.
Short duration transients of 4 ms or less and 100 mV
amplitude typically do not cause a false RESET.
Figure 7 shows the maximum pulse duration of
To ensure that the CAT811 RESET pin is in a known state
when V is under 1.0 V, a 100 kW pull−down resistor
CC
between RESET pin and GND is recommended; the value
is not critical. For the CAT812, a pull−up resistor from
negative−going V transients that do not cause a reset
RESET pin to V is needed.
CC
CC
condition. As the amplitude of the transient goes further
Power
Supply
below the threshold (increasing V − V ), the maximum
TH
CC
pulse duration decreases. In this test, the V starts from an
CC
V
CC
initial voltage of 0.5 V above the threshold and drops below
it by the amplitude of the overdrive voltage (V − V ).
TH
CC
CAT811
30
25
20
15
10
T
AMB
= 25°C
MR RESET
GND
100 kW
CAT8xxZ
Figure 8. RESET Valid with VCC Under 1.0 V
CAT8xxM
Power
Supply
5
0
V
CC
1
10
100
1000
100 kW
CAT812
RESET OVERDRIVE V − V (mV)
TH
CC
Figure 7. Maximum Transient Duration without
Causing a Reset Pulse vs. Reset Comparator
Overdrive
MR RESET
GND
Figure 9. RESET Valid with VCC Under 1.1 V
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6
CAT811, CAT812
Bi−directional Reset Pin Interfacing
The CAT811/812 can interface with mP/mC bi−directional reset pins by connecting a 4.7 kW resistor in series with the
CAT811/812 reset output and the mP/mC bi−directional reset pin.
BUF
Buffered
RESET
Power
Supply
CAT811
V
CC
(for example: 68HC11)
mP
4.7 kW
MR RESET
GND
RESET
INPUT
GND
Bi−directional I/O Pin
Figure 10. Bi−directional Reset Pin Interfacing
Table 5. OTHER SUPERVISORY PRODUCTS
Function
CAT1161/3
CAT1162
CAT809
CAT810
CAT811
CAT812
With 16k Bit Serial EEPROM Memory
a
a
Watchdog Timer
Manual Reset Input
Active Low Reset
Active High Reset
Dual Polarity Reset Outputs
Package
a
a
a
a
a
a
a
a
a
a
a
8−pin DIP
and SOIC
8−pin DIP
and SOIC
3−pin SOT−23 3−pin SOT−23
and SC70 and SC70
4−pin
SOT−143
4−pin
SOT−143
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7
CAT811, CAT812
PACKAGE DIMENSIONS
SOT−143, 4 Lead
CASE 527AF−01
ISSUE A
SYMBOL
MIN
NOM
MAX
A
A1
A2
b
0.80
0.05
0.75
0.30
0.76
0.08
2.80
2.10
1.22
0.15
1.07
0.50
0.89
0.20
3.04
2.64
D
e
0.90
4
1
3
2
b2
c
D
2.90
E1
E
E
E1
e
1.20
0.40
0°
1.30
1.92 BSC
0.20 BSC
0.50
1.40
0.60
8°
e1
L
e1
b
L1
L2
θ
0.54 REF
0.25
TOP VIEW
L2
q
c
A2
A1
A
L
b2
L1
SIDE VIEW
END VIEW
Notes:
(1) All dimensions are in millimeters. Angles in degrees.
(2) Complies with JEDEC TO-253.
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8
CAT811, CAT812
ORDERING INFORMATION
Order Number
Quantity
per Reel
(Note 5)
Top Mark (Note 4)
NiPdAu
Matte−Tin
NiPdAu
VEA
Matte−Tin
VES
Voltage
4.63 V
4.38 V
4.00 V
3.08 V
2.93 V
2.63 V
2.32 V
Output
Reset
Package
CAT811LTBI−GT3
CAT811MTBI−GT3
CAT811JTBI−GT3
CAT811TTBI−GT3
CAT811STBI−GT3
CAT811RTBI−GT3
CAT811ZTBI−GT3
CAT811LTBI−T3
CAT811MTBI−T3
CAT811JTBI−T3
CAT811TTBI−T3
CAT811STBI−T3
CAT811RTBI−T3
CAT811ZTBI−T3
VEA
VES
VEA
VES
Manual
Reset
VEA
VES
LOW
SOT−143−4
3,000
VEA
VES
VEA
VES
VEA
VES
CAT812LTBI−GT3
CAT812MTBI−GT3
CAT812JTBI−GT3
CAT812TTBI−GT3
CAT812STBI−GT3
CAT812RTBI−GT3
CAT812ZTBI−GT3
CAT812LTBI−T3
CAT812MTBI−T3
CAT812JTBI−T3
CAT812TTBI−T3
CAT812STBI−T3
CAT812RTBI−T3
CAT812ZTBI−T3
4.63 V
4.38 V
4.00 V
3.08 V
2.93 V
2.63 V
2.32 V
VTA
VTA
VTA
VTA
VTA
VTA
VTA
VTS
VTS
VTS
VTS
VTS
VTS
VTS
Manual
Reset
HIGH
SOT−143−4
3,000
4. Threshold and full part numbers will be provided on box and reel labels as well as all Shipping documents.
5. For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
6. For detailed information and a breakdown of device nomenclature and numbering systems, please see the ON Semiconductor Device
Nomenclature document, TND310/D, available at www.onsemi.com
ON Semiconductor and
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice
to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All
operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights
nor the rights of others. SCILLC 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 SCILLC product could create a situation where personal injury or death may occur. Should
Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates,
and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal
Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
LITERATURE FULFILLMENT:
N. American Technical Support: 800−282−9855 Toll Free
USA/Canada
Europe, Middle East and Africa Technical Support:
Phone: 421 33 790 2910
Japan Customer Focus Center
Phone: 81−3−5817−1050
ON Semiconductor Website: www.onsemi.com
Order Literature: http://www.onsemi.com/orderlit
Literature Distribution Center for ON Semiconductor
P.O. Box 5163, Denver, Colorado 80217 USA
Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada
Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada
Email: orderlit@onsemi.com
For additional information, please contact your local
Sales Representative
CAT811/D
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