ONSEMI MAX810

MAX809 Series,
MAX810 Series
Very Low Supply Current
3-Pin Microprocessor
Reset Monitors
The MAX809 and MAX810 are cost–effective system supervisor
circuits designed to monitor VCC in digital systems and provide a reset
signal to the host processor when necessary. No external components
are required.
The reset output is driven active within 10 µsec of VCC falling
through the reset voltage threshold. Reset is maintained active for a
minimum of 140 msec after VCC rises above the reset threshold. The
MAX810 has an active–high RESET output while the MAX809 has
an active–low RESET output. The output of the MAX809 is
guaranteed valid down to VCC = 1.0 V. Both devices are available in a
SOT–23 package.
The MAX809/810 are optimized to reject fast transient glitches on
the VCC line. Low supply current of 1.0 µA (VCC = 3.2 V) makes these
devices suitable for battery powered applications.
Features
• Precision VCC Monitor for 2.5 V, 3.0 V, 3.3 V, and 5.0 V Supplies
• Precision Monitoring Voltages from 1.6 V to 4.9 V Available
•
•
•
•
•
•
•
in 100 mV Steps
140 msec Guaranteed Minimum RESET Output Duration
RESET Output Guaranteed to VCC = 1.0 V
Low Supply Current
VCC Transient Immunity
Small SOT–23 Package
No External Components
Wide Operating Temperature: –40°C to 105°C
MARKING
DIAGRAMS
3
3
SOT–23
(TO–236)
CASE 318
1
xxxm
1
2
2
3
See specific device marking
information on page 8.
xxyw
1
xx, xxx
m
y
w
2
= Specific Device Code
= Date Code
= Year
= Work Week
PIN CONFIGURATION
GND
1
3
RESET**
(RESET)***
Typical Applications
•
•
•
•
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Computers
Embedded Systems
Battery Powered Equipment
Critical µP Power Supply Monitoring
VCC
2
SOT–23*
(Top View)
NOTE: * SOT–23 is equivalent to JEDEC (TO–236)
** RESET is for MAX809
*** RESET is for MAX810
VCC
ORDERING INFORMATION
VCC
MAX809/810
RESET
RESET
GND
Device
VCC
PROCESSOR
RESET
INPUT
Package
Shipping
MAX809xTR
SOT–23
3000 Tape/Reel
MAX809SNxxxT1
SOT–23
3000 Tape/Reel
MAX810xTR
SOT–23
3000 Tape/Reel
GND
NOTE: The “x” and “xxx” denotes a suffix for Vcc voltage
threshold options – see page 8 for more details.
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 8 of this data sheet.
Figure 1. Typical Application Diagram
 Semiconductor Components Industries, LLC, 2002
January, 2002 – Rev. 4
1
Publication Order Number:
MAX809S/D
MAX809 Series, MAX810 Series
PIN DESCRIPTION
ÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Pin No.
Symbol
Description
1
GND
2
RESET (MAX809)
RESET output remains low while VCC is below the reset voltage threshold, and for 240 msec (typ.)
after VCC rises above reset threshold
2
RESET (MAX810)
RESET output remains high while VCC is below the reset voltage threshold, and for 240 msec
(typ.) after VCC rises above reset threshold
3
VCC
Ground
Supply Voltage (typ.)
ABSOLUTE MAXIMUM RATINGS* (Note 1)
Rating
Symbol
Value
Unit
VCC
6.0
V
–0.3 to (VCC + 0.3)
V
Input Current, VCC
20
mA
Output Current, RESET
20
mA
dV/dt (VCC)
100
V/µsec
RJA
491
°C/W
Operating Temperature Range
(Data given for MAX809 threshold levels: 1.60 V, 2.32 V, 2.93 V,
4.63 V and 4.90 V)
TA
–40 to +105
°C
Operating Temperature Range
(Data given for MAX809 threshold levels: 2.63 V, 3.08 V, 4.00 V
and 4.38 V; MAX810 threshold levels: 2.63 V, 2.93 V, 3.08 V,
4.38 V and 4.63 V)
TA
–40 to +85
°C
Storage Temperature Range
Tstg
–65 to +150
°C
Tsol
+260
Supply Voltage (VCC to GND)
RESET
Thermal Resistance, Junction to Air
Lead Temperature (Soldering, 10 Seconds)
Latch–up performance:
°C
ILatch–up
mA
200
200
Positive
Negative
*Maximum Ratings are those values beyond which damage to the device may occur.
1. This device series contains ESD protection and exceeds the following tests:
Human Body Model 2000 V per MIL–STD–883, Method 3015.
Machine Model Method 350 V.
2. The maximum package power dissipation limit must not be exceeded.
TJ(max) TA
with TJ(max) = 150°C
PD RJA
ELECTRICAL CHARACTERISTICS TA = –40°C to +105°C unless otherwise noted. Typical values are at TA = +25°C. (Note 3)
The following data is given for MAX809 threshold levels: 1.60 V, 2.32 V, 2.93 V, 4.63 V and 4.90 V.
Characteristic
Symbol
VCC Range
TA = 0°C to +70°C
TA = –40°C to +105°C
Min
Typ
Max
1.0
1.2
–
–
5.5
5.5
Unit
V
Supply Current
VCC = 3.3 V
TA = –40°C to +85°C
TA = 85°C to +105°C
VCC = 5.5 V
TA = –40°C to +85°C
TA = 85°C to +105°C
µA
ICC
3. Production testing done at TA = 25°C, over temperature limits guaranteed by design.
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2
–
–
0.5
–
1.2
2.0
–
–
0.8
–
1.8
2.5
MAX809 Series, MAX810 Series
ELECTRICAL CHARACTERISTICS (continued) TA = –40°C to +105°C unless otherwise noted. Typical values are at TA = +25°C.
(Note 4) The following data is given for MAX809 threshold levels: 1.60 V, 2.32 V, 2.93 V, 4.63 V and 4.90 V.
Characteristic
Symbol
Reset Threshold (Note 5)
Min
Typ
Max
VTH
Unit
V
MAX809SN490
TA = +25°C
TA = –40°C to +85°C
TA = +85°C to +105°C
4.83
4.78
4.66
4.9
–
–
4.97
5.02
5.14
MAX809LTR
TA = +25°C
TA = –40°C to +85°C
TA = +85°C to +105°C
4.56
4.50
4.40
4.63
–
–
4.70
4.75
4.86
MAX809STR
TA = +25°C
TA = –40°C to +85°C
TA = +85°C to +105°C
2.89
2.85
2.78
2.93
–
–
2.96
3.00
3.08
MAX809SN232
TA = +25°C
TA = –40°C to +85°C
TA = +85°C to +105°C
2.28
2.25
2.21
2.32
–
–
2.35
2.38
2.45
MAX809SN160
TA = +25°C
TA = –40°C to +85°C
TA = +85°C to +105°C
1.58
1.56
1.52
1.6
–
–
1.62
1.64
1.68
Reset Temperature Coefficient
–
30
–
ppm/°C
VCC to Reset Delay VCC = VTH to (VTH – 100 mV)
–
10
–
µsec
140
240
460
msec
Reset Active Timeout Period
RESET Output Voltage Low
VCC = VTH – 0.2 V
1.6 V VTH 2.0 V, ISINK = 0.5 mA
2.1 V VTH 4.0 V, ISINK = 1.2 mA
4.1 V VTH 4.9 V, ISINK = 3.2 mA
VOL
–
–
0.3
V
RESET Output Voltage High
VCC = VTH + 0.2 V
1.6 V VTH 2.4 V, ISOURCE = 200 µA
2.5 V VTH 4.9 V, ISOURCE = 500 µA
VOH
0.8 VCC
–
–
V
4. Production testing done at TA = 25°C, over temperature limits guaranteed by design.
5. Contact your ON Semiconductor sales representative for other threshold voltage options.
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MAX809 Series, MAX810 Series
ELECTRICAL CHARACTERISTICS (VCC = Full Range, TA = –40°C to +85°C unless otherwise noted. Typical values are at
TA = +25°C, VCC = 5.0 V for L/M/J, 3.3 V for T/S, 3.0 V for R) (Note 6) The following data is given for MAX809 threshold levels:
2.63 V, 3.08 V, 4.00 V and 4.38 V; MAX810 threshold levels: 2.63 V, 2.93 V, 3.08 V, 4.38 V and 4.63 V.
Characteristic
Symbol
Min
Typ
Max
1.0
1.2
–
–
5.5
5.5
–
–
24
17
60
50
4.56
4.50
4.31
4.25
3.93
3.89
3.04
3.00
2.89
2.85
2.59
2.55
4.63
–
4.38
–
4.00
–
3.08
–
2.93
–
2.63
–
4.70
4.75
4.45
4.50
4.06
4.10
3.11
3.15
2.96
3.00
2.66
2.70
Reset Threshold Temperature Coefficient
–
30
–
ppm/°C
VCC to Reset Delay VCC = VTH to (VTH – 100 mV)
–
20
–
µsec
140
240
560
msec
–
–
–
–
–
–
0.3
0.4
0.3
0.8 VCC
VCC – 1.5
–
–
–
–
–
–
–
–
0.3
0.4
0.8 VCC
–
–
VCC Range
TA = 0°C to +70°C
TA = –40°C to +85°C
Unit
V
Supply Current
MAX8xxM/MAX809J/MAX810L: VCC < 5.5 V
MAX8xxR/T/MAX810S: VCC < 3.6 V
ICC
Reset Threshold (Note 6)
MAX810L: TA = 25°C
TA = –40°C to +85°C
MAX8xxM: TA = 25°C
TA = –40°C to +85°C
MAX809J: TA = 25°C
TA = –40°C to +85°C
MAX8xxT: TA = 25°C
TA = –40°C to +85°C
MAX810S: TA = 25°C
TA = –40°C to +85°C
MAX8xxR: TA = 25°C
TA = –40°C to +85°C
VTH
Reset Active Timeout Period
RESET Output Voltage Low (MAX809)
MAX809R/T: VCC = VTH min, ISINK = 1.2 mA
MAX809M/J: VCC = VTH min, ISINK = 3.2 mA
VCC > 1.0 V, ISINK = 50 µA
VOL
RESET Output Voltage High (MAX809)
MAX809R/T: VCC > VTH max, ISOURCE = 500 µA
MAX809M/J: VCC > VTH max, ISOURCE = 800 µA
VOH
RESET Output Voltage Low (MAX810)
MAX810R/S/T: VCC = VTH max, ISINK = 1.2 mA
MAX810L/M: VCC = VTH max, ISINK = 3.2 mA
VOL
RESET Output Voltage High (MAX810)
1.8 < VCC < VTH min, ISOURCE = 150 µA
VOH
6. Production testing done at TA = 25°C, over temperature limits guaranteed by design.
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4
µA
V
V
V
V
V
MAX809 Series, MAX810 Series
APPLICATIONS INFORMATION
VCC Transient Rejection
valid to VCC = 0 V, a pull–down resistor must be connected
from RESET to ground to discharge stray capacitances and
hold the output low (Figure 3). This resistor value, though
not critical, should be chosen such that it does not
appreciably load RESET under normal operation (100 k
will be suitable for most applications).
The MAX809 provides accurate VCC monitoring and reset
timing during power–up, power–down, and brownout/sag
conditions, and rejects negative–going transients (glitches)
on the power supply line. Figure 2 shows the maximum
transient duration vs. maximum negative excursion
(overdrive) for glitch rejection. Any combination of
duration and overdrive which lies under the curve will not
generate a reset signal. Combinations above the curve are
detected as a brownout or power–down. Typically, transient
that goes 100 mV below the reset threshold and lasts 5 µs or
less will not cause a reset pulse. Transient immunity can be
improved by adding a capacitor in close proximity to the VCC
pin of the MAX809.
VCC
VCC
MAX809/810
RESET
RESET
VCC
R1
100 k
GND
VTH
Overdrive
Figure 3. Ensuring RESET Valid to VCC = 0 V
Processors With Bidirectional I/O Pins
MAXIMUM TRANSIENT DURATION (µsec)
Duration
Some µP’s (such as Motorola 68HC11) have
bi–directional reset pins. Depending on the current drive
capability of the processor pin, an indeterminate logic level
may result if there is a logic conflict. This can be avoided by
adding a 4.7 k resistor in series with the output of the
MAX809 (Figure 4). If there are other components in the
system which require a reset signal, they should be buffered
so as not to load the reset line. If the other components are
required to follow the reset I/O of the µP, the buffer should
be connected as shown with the solid line.
120
100
80
60
VTH = 4.9 V
40
VTH = 1.6 V
20
BUFFER
0
10.0
BUFFERED RESET
TO OTHER SYSTEM
COMPONENTS
VCC
60.0
110.0
160.0
RESET COMPARATOR OVERDRIVE (mV)
VCC
VCC
P
MAX809/810
Figure 2. Maximum Transient Duration vs. Overdrive
for Glitch Rejection at 25°C
4.7 k
RESET
RESET
RESET Signal Integrity During Power–Down
GND
The MAX809 RESET output is valid to VCC = 1.0 V.
Below this voltage the output becomes an “open circuit” and
does not sink current. This means CMOS logic inputs to the
µP will be floating at an undetermined voltage. Most digital
systems are completely shutdown well above this voltage.
However, in situations where RESET must be maintained
RESET
GND
Figure 4. Interfacing to Bidirectional Reset I/O
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5
MAX809 Series, MAX810 Series
TYPICAL CHARACTERISTICS
The following data is given for MAX809 threshold levels: 1.60 V, 2.32 V, 2.93 V, 4.63 V and 4.90 V.
1.20
85°C
VTH = 4.9 V
VTH = 1.6 V
0.80
SUPPLY CURRENT (µA)
SUPPLY CURRENT IN MICROAMP
1.00
0.90
25°C
0.70
0.60
–40°C
0.50
0.40
0.30
0.20
25°C
0.80
–40°C
0.60
0.40
0.20
0.10
0.00
0.5
2.5
1.5
4.5
3.5
0.00
0.5
5.5
1
1.5
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD VOLTAGE
VTH = 1.6 V
1.08
1.06
1.04
1.02
VTH = 4.9 V
1.00
0.98
–40
–20
0
20
40
60
2.5
3
3.5
4
4.5
5
5.5
Figure 6. Supply Current vs. Supply Voltage
1.12
1.10
2
SUPPLY VOLTAGE (V)
Figure 5. Supply Current vs. Supply Voltage
NORMALIZED POWER–UP RESET TIMEOUT
85°C
1.00
80
1.002
VTH = 4.9 V
1.001
1.000
0.999
0.998
0.997
0.996
0.995
VTH = 1.6 V
0.994
0.993
0.992
–40
–20
0
20
40
60
80
TEMPERATURE (°C)
TEMPERATURE (°C)
Figure 7. Normalized Power–Up Reset vs.
Temperature
Figure 8. Normalized Reset Threshold Voltage
vs. Temperature
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6
MAX809 Series, MAX810 Series
TYPICAL CHARACTERISTICS
The following data is given for MAX809 threshold levels: 2.63 V, 3.08 V, 4.00 V and 4.38 V;
MAX810 threshold levels: 2.63 V, 2.93 V, 3.08 V, 4.38 V and 4.63 V.
35
30
VCC = 5 V
25
VCC = 5 V
SUPPLY CURRENT ( A)
SUPPLY CURRENT ( A)
30
25
20
VCC = 3 V
15
10
5
0
-40
20
10
5
VCC = 1 V
-20
0
20
40
TEMPERATURE (C°)
60
0
-40
85
Figure 9. Supply Current vs. Temperature
(No Load, MAX8xxR/T, MAX810S)
60
VOD = 20 mV
40
20
0
-40
VOD = 100 mV
VOD = 200 mV
-20
0
20
40
TEMPERATURE (C°)
60
0
20
40
TEMPERATURE (C°)
60
85
85
VOD = VTH – VCC
120
VOD = 10 mV
100
80
VOD = 20 mV
60
40
VOD = 100 mV
20
0
-40
VOD = 200 mV
-20
0
20
40
TEMPERATURE (C°)
60
85
Figure 12. Power–Down Reset Delay vs.
Temperature and Overdrive
(MAX8xxM/MAX809J, MAX810L)
Figure 11. Power–Down Reset Delay vs.
Temperature and Overdrive (MAX8xxR/T, MAX810S)
250
1.003
245
NORMALIZED THRESHOLD
POWER-UP RESET TIMEOUT (msec)
-20
140
VOD = VTH – VCC
VOD = 10 mV
80
VCC = 1 V
Figure 10. Supply Current vs. Temperature
(No Load, MAX8xxM/MAX809J, MAX810L)
POWER-DOWN RESET DELAY ( sec)
POWER-DOWN RESET DELAY ( sec)
100
VCC = 3 V
15
1.002
MAX810L
MAX8xxM/MAX809J
1.001
240
1.000
235
MAX8xxR/T
MAX810S
0.999
230
225
-40
0.998
-20
0
20
40
TEMPERATURE (C°)
60
0.997
85
-40
Figure 13. Power–Up Reset Timeout vs.
Temperature
-20
0
20
40
TEMPERATURE (C°)
60
85
Figure 14. Normalized Reset Threshold vs.
Temperature
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MAX809 Series, MAX810 Series
TAPING FORM
Component Taping Orientation for 3L SOT–23 (JEDEC–236) Devices
USER DIRECTION OF FEED
DEVICE
MARKING
PIN 1
Standard Reel Component Orientation
(Mark Right Side Up)
Tape & Reel Specifications Table
Package
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
SOT–23
8 mm
4 mm
3000
7 inches
MARKING AND THRESHOLD INFORMATION
Semicond ctor Part #
ON Semiconductor
VTH*
Description
Marking
MAX809SN160T1
1.60
SAAm
MAX809SN232T1
2.32
SQPm
MAX809STR
2.93
SPTm
MAX809LTR
4.63
SPWm
MAX809SN490T1
4.90
MAX809MTR
4.38
J2yw
MAX809TTR
3.08
J3yw
MAX809RTR
2.63
J5yw
MAX809JTR
4.00
J6yw
MAX810MTR
4.38
K2yw
MAX810TTR
3.08
K3yw
MAX810RTR
2.63
MAX810LTR
4.63
K1yw
MAX810STR
2.93
K4yw
Push–Pull RESET
Push–Pull RESET
*Contact your ON Semiconductor sales representative for other threshold voltage options.
m = Date Code
y = Year
w = Work Week
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8
SBHm
K5yw
MAX809 Series, MAX810 Series
PACKAGE DIMENSIONS
SOT–23
PLASTIC PACKAGE (TO–236)
CASE 318–08
ISSUE AH
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. MAXIMUM LEAD THICKNESS INCLUDES LEAD
FINISH THICKNESS. MINIMUM LEAD THICKNESS
IS THE MINIMUM THICKNESS OF BASE
MATERIAL.
4. 318-03 AND -07 OBSOLETE, NEW STANDARD
318-08.
A
L
3
1
V
B S
2
G
C
D
H
J
K
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9
DIM
A
B
C
D
G
H
J
K
L
S
V
INCHES
MIN
MAX
0.1102 0.1197
0.0472 0.0551
0.0350 0.0440
0.0150 0.0200
0.0701 0.0807
0.0005 0.0040
0.0034 0.0070
0.0140 0.0285
0.0350 0.0401
0.0830 0.1039
0.0177 0.0236
MILLIMETERS
MIN
MAX
2.80
3.04
1.20
1.40
0.89
1.11
0.37
0.50
1.78
2.04
0.013
0.100
0.085
0.177
0.35
0.69
0.89
1.02
2.10
2.64
0.45
0.60
MAX809 Series, MAX810 Series
Notes
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MAX809 Series, MAX810 Series
Notes
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MAX809 Series, MAX810 Series
ON Semiconductor and
are 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
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alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer.
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For additional information, please contact your local
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MAX809S/D