IMP809 Datasheet, PDF (1/7 Pages) IMP, Inc – 3-Pin Microcontroller Power Supply Supervisor

IMP809, IMP810
POWER MANAGEMENT
3-Pin Microcontroller
Power Supply Supervisor
The IMP809/IMP810 are 3.0V, 3.3V and 5.0V power supply supervisor cir-
cuits optimized for low-power microprocessor (µP), microcontroller (µC)
and digital systems. The IMP809/810 are improved drop-in replacements
for the Maxim MAX809/810 and feature 60% lower supply current.
A reset signal is issued if the power supply voltage drops below a preset
reset threshold and is asserted for at least 140ms after the supply has
risen above the reset threshold. The IMP809 has an active-low RESET
output that is guaranteed to be in the correct state for V_CC down to 1.1V.
The IMP810 has an active-high RESET output. The reset comparator is
designed to ignore fast transients on V_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 to support 3V to 5V systems:
Reset Threshold
Suffix
Voltage (V)
L
4.63
M
4.38
J
4.00
T
3.08
S
2.93
R
2.63
Key Features
x Improved Maxim MAX809/MAX810 replacement
— Lower supply current…6µA
— 80% lower maximum supply current
x Monitor 5V, 3.3V and 3V supplies
x 140ms min. reset pulse width
x Active-low reset valid with 1.1V supply
(IMP809)
x Small 3-pin SOT-23 package
x No external components
x Specified over full temperature range
— – 40°C to 105°C
Applications
x Embedded controllers
x Battery operated systems
x Intelligent instruments
x Wireless communication systems
x PDAs and handheld equipment
Block Diagrams
VCC
VCC
IMP809
(IMP810)
RESET
(RESET)
GND
IMP, Inc.
VCC
µP
RESET
Input
GND
809/10_01.eps
San Jose, CA
408-432-9100/www.impweb.com