Philips Semiconductors
Product data
3-pin microprocessor resets
MAX809/MAX810
DESCRIPTION
The MAX809/MAX810 are single function microprocessor resets
used to monitor supply voltages in microprocessor and other logic
systems. They provide a reset signal to the microprocessor during
power-up, power-down, and brownout conditions. The reset signal is
asserted when the supply voltage drops below the preset threshold,
and the signal is released a set time after the supply voltage has
risen above the preset threshold.
The MAX809 has an active-LOW reset output while the MAX810
has an active-HIGH reset output.
The low supply current of typically 17
µA
makes the
MAX809/MAX810 ideal for use in portable, battery operated
equipment. They are available in the 3-pin SOT23 and SC70
packages.
FEATURES
•
Monitors 5.0 V, 3.3 V and 3 V supplies
•
140 ms min. reset delay time:
–
Active-LOW RESET output (MAX809)
–
Active-HIGH RESET output (MAX810)
•
Power supply transient immunity
•
Guaranteed reset valid for 1.1 V
•
Available in small SOT23 and SC70 3-pin packages
•
No external components needed
•
Specified over full temperature range –40
°C
to +105
°C
APPLICATIONS
•
Embedded controllers
•
Battery operated systems
•
Wireless communication systems
•
PDAs and handheld equipment
SIMPLIFIED SYSTEM DIAGRAMS
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
MAX809
RESET
GND
MICROPROCESSOR
MAX810
RESET
GND
MICROPROCESSOR
RESET INPUT
GND
RESET INPUT
GND
SL01642
SL01643
Figure 1. MAX809 simplified system diagram.
Figure 2. MAX810 simplified system diagram.
2002 Oct 21
2
Philips Semiconductors
Product data
3-pin microprocessor resets
MAX809/MAX810
ORDERING INFORMATION
TYPE NUMBER
MAX809xD
MAX810xD
MAX809xW
MAX810xW
PACKAGE
NAME
SOT23-3
SOT23-3
SC70-3
SC70-3
DESCRIPTION
plastic small outline package; 3 leads (see dimensional drawing)
plastic small outline package; 3 leads (see dimensional drawing)
plastic small outline package; 3 leads; body width 1.15 mm
plastic small outline package; 3 leads; body width 1.15 mm
TEMPERATURE
RANGE
–40 to +105
°C
–40 to +105
°C
–40 to +105
°C
–40 to +105
°C
NOTE:
Each device has 7 voltage options, indicated by the
‘x’
on the ‘Type number’.
Part number
MAX809
MAX809ZD,
MAX809ZW
MAX809RD,
MAX809RW
MAX809SD,
MAX809SW
MAX809TD,
MAX809TW
MAX809JD,
MAX809JW
MAX809MD,
MAX809MW
MAX809LD,
MAX809LW
2.32 V
2.63 V
2.93 V
3.08 V
4.00 V
4.38 V
4.63 V
Reset Threshold Voltage (Typical)
Part number
MAX810
MAX810ZD,
MAX810ZW
MAX810RD,
MAX810RW
MAX810SD,
MAX810SW
MAX810TD,
MAX810TW
MAX810JD,
MAX810JW
MAX810MD,
MAX810MW
MAX810LD,
MAX810LW
2.32 V
2.63 V
2.93 V
3.08 V
4.00 V
4.38 V
4.63 V
Reset Threshold Voltage (Typical)
PINNING
GND
1
GND
1
MAX809
RESET
2
3
V
CC
MAX810
RESET
2
3
V
CC
SL01641
SL01644
Figure 3. MAX809 pin configuration.
Figure 4. MAX810 pin configuration.
MAX809 pin description
PIN
1
2
3
SYMBOL
GND
RESET
V
CC
DESCRIPTION
Device ground.
Active-LOW reset signal.
Supply voltage input.
MAX810 pin description
PIN
1
2
3
SYMBOL
GND
RESET
V
CC
DESCRIPTION
Device ground.
Active-HIGH reset signal.
Supply voltage input.
2002 Oct 21
3
Philips Semiconductors
Product data
3-pin microprocessor resets
MAX809/MAX810
ELECTRICAL CHARACTERISTICS
V
CC
= full range (T
amb
= –40
°C
to +105
°C)
unless otherwise noted; typical values are at T
amb
= +25
°C,
and V
CC
= 5 V (J/L/M versions),
V
CC
= 3.3 V (T/S versions), V
CC
= 3 V (R version), and V
CC
= 2.5 V (Z version) (Note 1).
SYMBOL
PARAMETER
V
CC
range
I
CC
Supply current (SOT23-3)
CONDITIONS
T
amb
= 0
°C
to +70
°C
T
amb
= –40
°C
to +105
°C
MAX809J/L/M
MAX810J/L/M
MAX809R/S/T/Z
MAX810R/S/T/Z
MAX809J/L/M
MAX810J/L/M
MAX809R/S/T/Z
MAX810R/S/T/Z
I
CC
Supply current (SC70-3)
MAX809J/L/M
MAX810J/L/M
MAX809R/S/T/Z
MAX810R/S/T/Z
MAX809J/L/M
MAX810J/L/M
MAX809R/S/T/Z
MAX810R/S/T/Z
V
th
RESET threshold voltage
(SOT23-3 d SC70-3)
(SOT23 3 and SC70 3)
MAX809Z
MAX810Z
V
CC
< 5.5 V;
T
amb
= –40
°C
to +85
°C
V
CC
< 3.6 V;
T
amb
= –40
°C
to +85
°C
V
CC
< 5.5 V;
T
amb
= +85
°C
to +105
°C
V
CC
< 3.6 V;
T
amb
= +85
°C
to +105
°C
V
CC
< 5.5 V;
T
amb
= –40
°C
to +85
°C
V
CC
< 3.6 V;
T
amb
= –40
°C
to +85
°C
V
CC
< 5.5 V;
T
amb
= +85
°C
to +105
°C
V
CC
< 3.6 V;
T
amb
= +85
°C
to +105
°C
T
amb
= +25
°C
T
amb
= –40
°C
to +85
°C
T
amb
= +85
°C
to +105
°C
MAX809R
MAX810R
T
amb
= +25
°C
T
amb
= –40
°C
to +85
°C
T
amb
= +85
°C
to +105
°C
MAX809S
MAX810S
T
amb
= +25
°C
T
amb
= –40
°C
to +85
°C
T
amb
= +85
°C
to +105
°C
MAX809T
MAX810T
T
amb
= +25
°C
T
amb
= –40
°C
to +85
°C
T
amb
= +85
°C
to +105
°C
MAX809J
MAX810J
T
amb
= +25
°C
T
amb
= –40
°C
to +85
°C
T
amb
= +85
°C
to +105
°C
MAX809M
MAX810M
T
amb
= +25
°C
T
amb
= –40
°C
to +85
°C
T
amb
= +85
°C
to +105
°C
MAX809L
MAX810L
T
amb
= +25
°C
T
amb
= –40
°C
to +85
°C
T
amb
= +85
°C
to +105
°C
Reset threshold temperature
coefficient
V
CC
to RESET delay
RESET active time-out period
(SOT23-3)
(SOT23 3)
RESET active time-out period
(SC70-3)
(SC70 3)
V
CC
= V
th
to (V
th
– 100 mV)
T
amb
= –40
°C
to +85
°C
T
amb
= +85
°C
to +105
°C
T
amb
= –40
°C
to +85
°C
T
amb
= +85
°C
to +105
°C
MIN.
1.0
1.2
–
–
–
–
–
–
–
–
2.28
2.25
2.22
2.59
2.55
2.50
2.89
2.85
2.78
3.04
3.00
2.92
3.93
3.89
3.80
4.31
4.25
4.16
4.56
4.50
4.40
–
–
140
100
140
100
TYP.
–
–
24
17
–
–
24
17
–
–
2.32
–
–
2.63
–
–
2.93
–
–
3.08
–
–
4.00
–
–
4.38
–
–
4.63
–
–
30
20
240
–
240
–
MAX.
5.5
5.5
60
50
100
100
35
30
60
60
2.35
2.38
2.42
2.66
2.70
2.76
2.96
3.00
3.08
3.11
3.15
3.23
4.06
4.10
4.20
4.45
4.50
4.56
4.70
4.75
4.86
–
–
560
840
460
840
UNIT
V
V
µA
µA
µA
µA
µA
µA
µA
µA
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
ppm/°C
µs
ms
ms
ms
ms
2002 Oct 21
5
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