2024年3月19日发(作者：戴学智)
ISO 9001 Registered
IMP809, IMP810
POWER MANAGEMENT
General Description
Key Features
The IMP809/IMP810 are 3.0V, 3.3V and 5.0V power
- Improved Maxim MAX809/MAX810 replacement
supply supervisor circuits optimized for low-power
microprocessor (µP), microcontroller (µC) and digital
—Lower supply current…6µA
systems. The IMP809/810 are improved drop-in re-
—80% lower maximum supply current
placements for the Maxim MAX809/810 and feature
- Monitor 5V, 3.3V and 3V supplies
60% lower supply current.
- 140ms min. reset pulse width
A reset signal is issued if the power supply voltage
drops below a preset reset threshold and is asserted for
- Active-low reset valid with 1.1V supply
at least 140ms after the supply has risen above the
(IMP809)
reset threshold. The IMP809 has an active-low RE-
- Small 3-pin SOT-23 package
SET output that is guaranteed to be in the correct state - No external components
for V
CC
down to 1.1V. The IMP810 has an active-high
RESET output. The reset comparator is designed to
- Specified over full temperature range
ignore fast transients on V
— -40°C to 105°C
CC
.
Low supply current makes the IMP809/IMP810 ideal
for use in portable and battery operated equipment.
The IMP809/IMP810 are available in a compact 3-pin
SOT23 package. Six voltage thresholds are available
Applications
to support 3V to 5V systems:
- Embedded controllers
Reset Threshold
Suffix Voltage (V)
- Battery operated systems
L 4.63
- Intelligent instruments
M 4.38
J 4.00
- Wireless communication systems
T 3.08
- PDAs and handheld equipment
S 2.93
R 2.63
Z 2.32
Pin Assignments
SOT23
GND
IMP809
(IMP810)
V
CC
(RESET)
¯¯¯¯¯¯
RESET
Daily Silver IMP 1
ISO 9001 Registered
IMP809, IMP810
POWER MANAGEMENT
Pin Descriptions
Pin Number
1
2
(IMP809)
2
(IMP810)
3
Function
Ground
RESET is
¯¯¯¯¯¯
asserted LOW if V
CC
falls below the reset threshold and remains LOW for the
RESET
¯¯¯¯¯¯
240ms typical reset timeout period (140ms minimum) after V
CC
exceeds the threshold.
RESET is asserted HIGH if V
CC
falls below the reset threshold and remains HIGH for the
RESET
240ms typical reset timeout period (140ms minimum) after V
CC
exceeds the threshold.
V
CC
Power supply input voltage (3.0V, 3.3V, 5.0V)
Name
GND
Absolute Maximum Ratings
Pin Terminal Voltage with Respect to Ground
V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to 6.0V
RESET, RESET . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to (V
CC
+ 0.3V)
Input Current at V
CC
. . . . . . . . . . . . . . . . . . . 20mA
Output Current: RESET, RESET . . . . . . . . . 20mA
Rate of Rise at V
CC
. . . . . . . . . . . . . . . . . . . . 100V/µs
Power Dissipation (T
A
= 70°C) . . . . . . . . . . 320mW
(Derate 4mW/°C above 70°C)
Operating Temperature Range . . . . . . . . . . –40°C to 105°C
Storage Temperature Range . . . . . . . . . . . . . –65°C to 160°C
Lead Temperature (soldering, 10 sec) . . . . . 300°C
These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for
prolonged time periods may affect device reliability.
Block Diagram
V
CC
V
CC
IMP809
(IMP810)
¯¯¯¯¯¯
RESET
RESET
GND
V
CC
¯¯¯¯¯¯
RESET
Input
GND
Daily Silver IMP 2
2024年3月19日发(作者：戴学智)
ISO 9001 Registered
IMP809, IMP810
POWER MANAGEMENT
General Description
Key Features
The IMP809/IMP810 are 3.0V, 3.3V and 5.0V power
- Improved Maxim MAX809/MAX810 replacement
supply supervisor circuits optimized for low-power
microprocessor (µP), microcontroller (µC) and digital
—Lower supply current…6µA
systems. The IMP809/810 are improved drop-in re-
—80% lower maximum supply current
placements for the Maxim MAX809/810 and feature
- Monitor 5V, 3.3V and 3V supplies
60% lower supply current.
- 140ms min. reset pulse width
A reset signal is issued if the power supply voltage
drops below a preset reset threshold and is asserted for
- Active-low reset valid with 1.1V supply
at least 140ms after the supply has risen above the
(IMP809)
reset threshold. The IMP809 has an active-low RE-
- Small 3-pin SOT-23 package
SET output that is guaranteed to be in the correct state - No external components
for V
CC
down to 1.1V. The IMP810 has an active-high
RESET output. The reset comparator is designed to
- Specified over full temperature range
ignore fast transients on V
— -40°C to 105°C
CC
.
Low supply current makes the IMP809/IMP810 ideal
for use in portable and battery operated equipment.
The IMP809/IMP810 are available in a compact 3-pin
SOT23 package. Six voltage thresholds are available
Applications
to support 3V to 5V systems:
- Embedded controllers
Reset Threshold
Suffix Voltage (V)
- Battery operated systems
L 4.63
- Intelligent instruments
M 4.38
J 4.00
- Wireless communication systems
T 3.08
- PDAs and handheld equipment
S 2.93
R 2.63
Z 2.32
Pin Assignments
SOT23
GND
IMP809
(IMP810)
V
CC
(RESET)
¯¯¯¯¯¯
RESET
Daily Silver IMP 1
ISO 9001 Registered
IMP809, IMP810
POWER MANAGEMENT
Pin Descriptions
Pin Number
1
2
(IMP809)
2
(IMP810)
3
Function
Ground
RESET is
¯¯¯¯¯¯
asserted LOW if V
CC
falls below the reset threshold and remains LOW for the
RESET
¯¯¯¯¯¯
240ms typical reset timeout period (140ms minimum) after V
CC
exceeds the threshold.
RESET is asserted HIGH if V
CC
falls below the reset threshold and remains HIGH for the
RESET
240ms typical reset timeout period (140ms minimum) after V
CC
exceeds the threshold.
V
CC
Power supply input voltage (3.0V, 3.3V, 5.0V)
Name
GND
Absolute Maximum Ratings
Pin Terminal Voltage with Respect to Ground
V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to 6.0V
RESET, RESET . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to (V
CC
+ 0.3V)
Input Current at V
CC
. . . . . . . . . . . . . . . . . . . 20mA
Output Current: RESET, RESET . . . . . . . . . 20mA
Rate of Rise at V
CC
. . . . . . . . . . . . . . . . . . . . 100V/µs
Power Dissipation (T
A
= 70°C) . . . . . . . . . . 320mW
(Derate 4mW/°C above 70°C)
Operating Temperature Range . . . . . . . . . . –40°C to 105°C
Storage Temperature Range . . . . . . . . . . . . . –65°C to 160°C
Lead Temperature (soldering, 10 sec) . . . . . 300°C
These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for
prolonged time periods may affect device reliability.
Block Diagram
V
CC
V
CC
IMP809
(IMP810)
¯¯¯¯¯¯
RESET
RESET
GND
V
CC
¯¯¯¯¯¯
RESET
Input
GND
Daily Silver IMP 2