IMP811JEUS-T IMP [IMP, Inc], IMP811JEUS-T Datasheet

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IMP811JEUS-T

Manufacturer Part Number
IMP811JEUS-T
Description
4-pin ?P Voltage Supervisor with Manual Reset
Manufacturer
IMP [IMP, Inc]
Datasheet

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The IMP811/IMP812 are low-power supervisors designed to monitor
voltage levels of 3.0V, 3.3V and 5.0V power supplies in low-power
microprocessor (µP), microcontroller (µC) and digital systems. Each fea-
tures a debounced manual reset input. The IMP811/812 are improved
drop-in replacements for the Maxim MAX811/812 with extended
temperature specifications to 105°C.
A reset signal is issued if the power supply voltage drops below a preset
threshold and is asserted for at least 140ms after the supply has risen
above the reset threshold. The IMP811 has an active-low output RESET
that is guaranteed to be in the correct state for V
IMP812 has an active-high output RESET. The reset comparator is
designed to ignore fast transients on V
Low power consumption makes the IMP811/IMP812 ideal for use in
portable and battery-operated equipment. Available in a compact 4-pin
SOT143 package, the devices use minimal board space.
Six voltage thresholds are available to support 3V to 5V systems:
©
1999 IMP, Inc.
Block Diagrams
Manual
Reset
V CC
MR
(IMP812)
IMP811
GND
V CC
(RESET)
M
T
S
R
RESET
L
J
CC
.
4.63
4.38
4.00
3.08
2.93
2.63
CC
RESET
Input
408-432-9100/www.impweb.com
down to 1.1V. The
µC or µP
GND
V CC
811/12_01.eps
IMP8
IMP8
N Improved Maxim MAX811/MAX812 replacement
N 6µA supply current
N Monitor 5V, 3.3V and 3V supplies
N Manual reset input
N 140ms min. reset pulse width
N Guaranteed over temperature
N Active-LOW reset valid with 1.1V supply
N Small 4-pin SOT-143 package
N No external components
N Power-supply transient-immune design
N Computers and controllers
N Embedded controllers
N Battery operated systems
N Intelligent instruments
N Wireless communication systems
N PDAs and handheld equipment
— Specified to 105°C
— New 4.0V threshold option
(IMP811)
1
1
1
1
, IMP8
, IMP8
Key Features
Applications
1
1
2
2
1

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IMP811JEUS-T Summary of contents

Page 1

The IMP811/IMP812 are low-power supervisors designed to monitor voltage levels of 3.0V, 3.3V and 5.0V power supplies in low-power microprocessor (µP), microcontroller (µC) and digital systems. Each fea- tures a debounced manual reset input. The IMP811/812 are improved drop-in replacements ...

Page 2

... Pin Configuration GND 1 IMP811 (IMP812) 2 (RESET) RESET Ordering Information IMP811LEUS-T IMP811MEUS-T IMP811JEUS-T IMP811TEUS-T IMP811SEUS-T IMP811REUS-T IMP812LEUS-T IMP812MEUS-T IMP812JEUS-T IMP812TEUS-T IMP812SEUS-T IMP812REUS-T Notes: 1. Tape and Reel packaging is indicated by the -T designation. 2. Devices may also be marked with full part number: 811L, 812M etc. XX refers to lot. ...

Page 3

Unless otherwise noted V is over the full voltage range Typical values 25° for L/M/J devices Input Voltage (V ) Range V CC Supply Current (Unloaded) Reset Threshold V ...

Page 4

Pin Descriptions 1 GND 2 RESET (IMP811) 2 RESET (IMP812 Related Products Max. Supply Current Package Pins Manual RESET input Package Type Active-HIGH RESET output Active-LOW RESET output 4 Ground RESET is asserted LOW if ...

Page 5

Reset Timing and Manual Reset (MR) The reset signal is asserted–LOW for the IMP811 and HIGH for the IMP812 – when the V signal falls below the threshold trip CC voltage and remains asserted for 140ms minimum after the V ...

Page 6

Application Information RESET Output Operation In µP/µC systems it is important to have the processor begin operation from a known state or be able to return the system to a known state. A RESET output to a processor is provided ...

Page 7

Bi-directional Reset Pin Interfacing The IMP811/812 can interface with µP/µC bi-directional reset pins by connecting a 4.7kΩ resistor in series with the IMP809/810 reset output and the µP/µC bi-directional reset pin. Power Supply ...

Page 8

IMP, Inc. Corporate Headquarters 2830 N. First Street San Jose, CA 95134-2071 Tel: 408-432-9100 Tel: 800-438-3722 Fax: 408-434-0335 e-mail: info@impinc.com http://www.impweb.com The IMP logo is a registered trademark of IMP, Inc. All other company and product names are trademarks of ...

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