CAT853, CAT859, CAT863,
CAT869
3-Pin Microprocessor
Power Supply Supervisors
Description
The CAT853, CAT863, CAT859, and CAT869 are supervisory
circuits that monitor power supplies in digital systems.
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.
Industry standard threshold levels are offered to support +3.3 V or
5.0 V systems.
The CAT859 and CAT869 feature a RESET push−pull output
(active low) for the two pinout options.
The CAT853 and CAT863 feature an open drain RESET output
(active low). Both require a pull−up resistor on the RESET output.
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.
Features
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SOT−23
TB SUFFIX
CASE 527AG
PIN CONFIGURATION
CAT853, CAT859
1
RESET
3
• Precision Monitoring of +3.3 V (−5%, −10%),
•
•
•
•
•
•
•
VCC
5 V (−10% Power Supplies)
Active Low Reset Output
Reset Valid down to VCC = 1.0 V
6 mA Power Supply Current
Power Supply Transient Immunity
Industrial Temperature Range: −40°C to +85°C
SOT−23 Package
These Devices are Pb−Free and are RoHS Compliant
2
GND
CAT863, CAT869
1
RESET
3
GND
2
VCC
Applications
Computers, Servers, Laptops and Cable Modems
Wireless Communications
Embedded Control Systems
White Goods
Power Meters
Intelligent Instruments
PDAs and Handheld Equipment
(Top Views)
MARKING DIAGRAM
1
•
•
•
•
•
•
•
Table 1. THRESHOLD SUFFIX SELECTOR
Nominal Threshold Voltage
Threshold Suffix Designation
XXX
M
G
XXXMG
G
= Specific Device Code
= Date Code
= Pb−Free Package
4.63 V
L
4.38 V
M
4.20 V
F
4.00 V
J
ORDERING INFORMATION
3.08 V
T
2.93 V
S
See detailed ordering and shipping information in the package
dimensions section on page 8 of this data sheet.
2.63 V
R
2.40 V
C
2.32 V
Z
© Semiconductor Components Industries, LLC, 2012
May, 2012 − Rev. 10
(*Note: Microdot may be in either location)
1
Publication Order Number:
CAT853/D
CAT853, CAT859, CAT863, CAT869
Table 2. PIN DESCRIPTION
Pin Name
RESET
Function
Active low reset. RESET is asserted if VCC falls below the reset threshold and remains low for at least 140 ms after
VCC rises above the reset threshold
GND
Ground
VCC
Power supply voltage that is monitored
VCC
VCC
VCC
TOLERANCE
BIAS
+
RESET
DIGITAL
DELAY
–
VOLTAGE
REFERENCE
CAT853
CAT863
GND
VCC
VCC
VCC
TOLERANCE
BIAS
+
DIGITAL
DELAY
–
VOLTAGE
REFERENCE
RESET
CAT859
CAT869
GND
Figure 1. Block Diagrams
Table 3. ABSOLUTE MAXIMUM RATINGS
Parameters
Ratings
Units
−0.3 to +6.0
V
Input Current, VCC
20
mA
Output Current, RESET
20
mA
Rate of Rise, VCC
100
V/ms
Continuous Power Dissipation
Derate 4 mW/°C above 70°C (SOT23)
320
mW
Operating Temperature Range
−40 to +85
°C
Storage Temperature Range
−65 to +105
°C
300
°C
Any pin with respect to ground
Lead Soldering Temperature (10 sec)
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.
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2
CAT853, CAT859, CAT863, CAT869
Table 4. ELECTRICAL CHARACTERISTICS (VCC = Full range, TA = −40°C to +85°C unless otherwise noted.
Typical values at TA = +25°C and VCC = 3.3 V for the C, S, T versions, VCC = 5 V for the M version.)
Symbol
Parameter
VCC Range
Conditions
Min
Units
V
1.0
5.5
TA = −40°C to +85°C
1.2
5.5
Supply Current
TA = −40°C to +85°C
VTH
Reset Threshold
Voltage
L Threshold
VCC < 3.6 V, C, S, T
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
4.14
TA = −40°C to +85°C
4.08
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
2.35
TA = −40°C to +85°C
2.30
TA = +25°C
2.28
TA = −40°C to +85°C
2.25
M Threshold
F Threshold
J Threshold
T Threshold
S Threshold
R Threshold
C Threshold
Z Threshold
Reset Threshold
Tempco
VOH
Max
TA = 0°C to +70°C
ICC
VOL
Typ
(Note 1)
VCC to Reset Delay
VCC = VTH to (VTH − 100 mV)
Reset Active
Timeout Period
TA = −40°C to +85°C
RESET Output
Voltage Low
RESET Output
Voltage High
VCC = VTH max, ISOURCE = −500 mA
(for CAT859/869 only)
140
6
15
mA
4.63
4.70
V
4.75
4.38
4.45
4.50
4.20
4.26
4.31
4.00
4.06
4.10
3.08
3.11
3.15
2.93
2.96
3.00
2.63
2.66
2.70
2.40
2.45
2.50
2.32
2.35
2.38
30
ppm/°C
20
ms
460
ms
VCC = VTH min, ISINK = 1.2 mA
0.4
V
VCC > 1.0 V, ISINK = 50 mA
0.3
0.8 VCC
1. Production testing done at TA = +25°C; limits over temperature guaranteed by design only.
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3
240
V
CAT853, CAT859, CAT863, CAT869
TYPICAL ELECTRICAL OPERATING CHARACTERISTICS
(VCC = Full range, TA = −40°C to +85°C unless otherwise noted. Typical values at TA = +25°C and VCC = 3.3 V
for the C, S, T versions, VCC = 5 V for the M version.)
12
SUPPLY CURRENT (mA)
240
VCC = 5 V
220
VCC = 2.5 V
200
180
160
−50
0
50
100
10
VCC = 5.5 V
8
4
2
0
50
100
150
TEMPERATURE (°C)
TEMPERATURE (°C)
Figure 2. Power−Up Reset Timeout vs.
Temperature
Figure 3. Supply Current vs. Temperature
(No Load)
14
1.0002
12
1.0000
10
8
6
4
2
0
−50
VCC = 3.6 V
6
0
−50
150
NORMALIZED THRESHOLD
POWER−DOWN RESET DELAY (ms)
POWER−UP RESET TIMEOUT (ms)
260
0
50
100
0.9998
0.9996
0.9994
0.9992
0.9990
0.9988
150
0
20
40
60
80
100
TEMPERATURE (°C)
TEMPERATURE (°C)
Figure 4. Power−Down Reset Delay vs.
Temperature
Figure 5. Normalized Reset Threshold vs.
Temperature
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4
120
CAT853, CAT859, CAT863, CAT869
DETAILED DESCRIPTION
Reset Timing
The reset signal is asserted low for the CAT853, CAT863, CAT859, and CAT869 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.
Power
Supply
Voltage
RESET
Threshold
Voltage
5V
0V
Reset Timeout Period
140 ms
minimum
5V
0V
Figure 6. Reset Timing Diagram
VCC Transient Response
Valid Reset with VCC under 1.0 V
The CAT853, CAT863, CAT859, and CAT869 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
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 0.5 V above the threshold and drops below
it by the amplitude of the overdrive voltage (VTH − VCC).
To ensure that the CAT859 and CAT869 RESET pin is in
a known state when VCC is under 1.0 V, a > 10 kW
pull−down resistor between RESET pin and GND is
recommended.
Power
Supply
VCC
CAT8x9
30
TRANSIENT DURATION (s)
TAMB = 25°C
RESET
25
20
GND
“C” THRESHOLD
15
Figure 8. RESET Valid with VCC Under 1.0 V
10
“M” THRESHOLD
5
0
10 kW
1
10
100
1000
RESET OVERDRIVE VTH − VCC (mV)
Figure 7. Maximum Transient Duration Without
Causing a Reset Pulse vs. Reset Comparator
Overdrive
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5
CAT853, CAT859, CAT863, CAT869
Bi−directional Reset Pin Interfacing
The CAT859 and CAT869 can interface with mP/mC bi−directional reset pins by connecting a 4.7 kW resistor in series with
the CAT859 and CAT869 reset output and the mP/mC bi−directional reset pin.
BUF
Buffered
RESET
Power
Supply
VCC
VCC
CAT8x9
mP
4.7 kW
(For example:
68HC11)
RESET
INPUT
RESET
GND
GND
Bi−directional
I/O Pin
Figure 9. Bi−directional Reset Pin Interfacing
CAT853 and CAT863 Open−Drain RESET Application
several outputs together to form an inexpensive logic circuit.
It is also possible to have the pull−up resistor connected to
a different supply which can be higher than the CAT8x3 VCC
pin. The value of the pull−up resistor is not critical in most
applications, typical values being between 5 kW and 10 kW.
The CAT853 and CAT863 features an open−drain RESET
output and therefore need a pull−up resistor on the output for
proper operation, as shown on Figure 10. An advantage of
the open−drain output includes the ability to “wire AND”
Power
Supply
VCC
5 kW
VCC
CAT8x3
mP
RESET
INPUT
RESET
GND
GND
Figure 10. Typical CAT8x3 Open−Drain Circuit Configuration
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6
CAT853, CAT859, CAT863, CAT869
PACKAGE DIMENSIONS
SOT−23, 3 Lead
CASE 527AG−01
ISSUE O
MIN
SYMBOL
D
3
E1
1
E
2
e
e1
A
0.89
1.12
0.013
0.10
b
0.37
0.50
c
0.085
0.18
D
2.80
3.04
E
2.10
2.64
E1
1.20
1.40
e
0.95 BSC
e1
1.90 BSC
L
0.40 REF
0.54 REF
0º
θ
A
MAX
A1
L1
TOP VIEW
NOM
8º
q
b
L1
A1
SIDE VIEW
L
END VIEW
Notes:
(1) All dimensions are in millimeters. Angles in degrees.
(2) Complies with JEDEC TO-236.
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7
c
CAT853, CAT859, CAT863, CAT869
ORDERING INFORMATION
Reset
Package
Quantity
per Reel
(Note 3)
LOW
SOT−23−3
3,000
LOW
SOT−23−3
3,000
LOW
SOT−23−3
3,000
LOW
SOT−23−3
3,000
Top Mark (Note 2)
Order Number
NiPdAu
Matte−Tin
Voltage
NiPdAu
Matte−Tin
CAT853LTBI−GT3
CAT853LTBI−T3
4.63 V
VPA
VPR
CAT853MTBI−GT3
CAT853MTBI−T3
4.38 V
VPA
VPR
CAT853FTBI−GT3
CAT853FTBI−T3
4.20 V
VPA
VPR
CAT853JTBI−GT3
CAT853JTBI−T3
4.00 V
VPA
VPR
CAT853TTBI−GT3
CAT853TTBI−T3
3.08 V
VPA
VPR
CAT853STBI−GT3
CAT853STBI−T3
2.93 V
VPA
VPR
CAT853RTBI−GT3
CAT853RTBI−T3
2.63 V
VPA
VPR
CAT853CTBI−GT3
CAT853CTBI−T3
2.40 V
VPA
VPR
CAT853ZTBI−GT3
CAT853ZTBI−T3
2.32 V
VPA
VPR
CAT859LTBI−GT3
CAT859LTBI−T3
4.63 V
VNA
VNR
CAT859MTBI−GT3
CAT859MTBI−T3
4.38 V
VNA
VNR
CAT859FTBI−GT3
CAT859FTBI−T3
4.20 V
VNA
VNR
CAT859JTBI−GT3
CAT859JTBI−T3
4.00 V
VNA
VNR
CAT859TTBI−GT3
CAT859TTBI−T3
3.08 V
VNA
VNR
CAT859STBI−GT3
CAT859STBI−T3
2.93 V
VNA
VNR
CAT859RTBI−GT3
CAT859RTBI−T3
2.63 V
VNA
VNR
CAT859CTBI−GT3
CAT859CTBI−T3
2.40 V
VNA
VNR
CAT859ZTBI−GT3
CAT859ZTBI−T3
2.32 V
VNA
VNR
CAT863LTBI−GT3
CAT863LTBI−T3
4.63 V
VNB
VNK
CAT863MTBI−GT3
CAT863MTBI−T3
4.38 V
VNB
VNK
CAT863FTBI−GT3
CAT863FTBI−T3
4.20 V
VNB
VNK
CAT863JTBI−GT3
CAT863JTBI−T3
4.00 V
VNB
VNK
CAT863TTBI−GT3
CAT863TTBI−T3
3.08 V
VNB
VNK
CAT863STBI−GT3
CAT863STBI−T3
2.93 V
VNB
VNK
CAT863RTBI−GT3
CAT863RTBI−T3
2.63 V
VNB
VNK
CAT863CTBI−GT3
CAT863CTBI−T3
2.40 V
VNB
VNK
CAT863ZTBI−GT3
CAT863ZTBI−T3
2.32 V
VNB
VNK
CAT869LTBI−GT3
CAT869LTBI−T3
4.63 V
VNC
VNJ
CAT869MTBI−GT3
CAT869MTBI−T3
4.38 V
VNC
VNJ
CAT869FTBI−GT3
CAT869FTBI−T3
4.20 V
VNC
VNJ
CAT869JTBI−GT3
CAT869JTBI−T3
4.00 V
VNC
VNJ
CAT869TTBI−GT3
CAT869TTBI−T3
3.08 V
VNC
VNJ
CAT869STBI−GT3
CAT869STBI−T3
2.93 V
VNC
VNJ
CAT869RTBI−GT3
CAT869RTBI−T3
2.63 V
VNC
VNJ
CAT869CTBI−GT3
CAT869CTBI−T3
2.40 V
VNC
VNJ
CAT869ZTBI−GT3
CAT869ZTBI−T3
2.32 V
VNC
VNJ
2. Threshold and full part numbers will be provided on box and reel labels as well as all Shipping documents.
3. 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.
4. 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
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8
MECHANICAL CASE OUTLINE
PACKAGE DIMENSIONS
SOT−23/SUPERSOTt−23, 3 LEAD, 1.4x2.9
CASE 527AG
ISSUE A
GENERIC
MARKING DIAGRAM*
XXXMG
G
DOCUMENT NUMBER:
DESCRIPTION:
XXX = Specific Device Code
M
= Month Code
G
= Pb−Free Package
(Note: Microdot may be in either location)
98AON34319E
DATE 09 DEC 2019
*This information is generic. Please refer to
device data sheet for actual part marking.
Pb−Free indicator, “G” or microdot “G”, may
or may not be present. Some products may
not follow the Generic Marking.
Electronic versions are uncontrolled except when accessed directly from the Document Repository.
Printed versions are uncontrolled except when stamped “CONTROLLED COPY” in red.
SOT−23/SUPERSOT−23, 3 LEAD, 1.4X2.9
PAGE 1 OF 1
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