IMP1233M View Datasheet(PDF) - A1 PROs co., Ltd.
Part Name
Description
MFG CO.
IMP1233M
A1 PROs co., Ltd.
'IMP1233M' PDF : 36 Pages View PDF
IMP1815
POWER MANAGEMENT
Low Power, 3.3V/3.0V µP Reset
– Active LOW, Push-Pull Output
The IMP1815 supply voltage monitor is an improved, low-power
replacement for the Dallas Semiconductor DS1815. Maximum supply
current over temperature is a low 15µA, representing over 50 percent
lower power as compared to the DS1815.
The IMP1815 issues an active LOW reset signal whenever the monitored
supply is out-of-tolerance. A precision reference and comparator circuit
monitor power supply (VCC) level. Tolerance level options are 5-, 10- and
20-percent. When an out-of-tolerance condition is detected, an internal
power-fail signal is generated which forces an active LOW reset signal.
After VCC returns to an in-tolerance condition, the reset signal remains
active for 150ms to allow the power supply and system microprocessor
to stabilize.
The IMP1815 is designed with a push-pull output stage and operates
over the extended industrial temperature range. Devices are available in
compact surface mount SOT-23 packages and 3-lead TO-92 packages.
Other low power products in this family include the IMP1810/11/12/16/17,
IMP1233D and IMP1233M.
Family Selection Guide
Part
IMP1810
IMP1811
IMP1812
IMP1815
IMP1816
IMP1817
IMP1233D
IMP1233M
RESET Voltage
(V)
4.620, 4.370, 4.120
4.620, 4.350, 4.130
4.620, 4.350, 4.130
3.060, 2.880, 2.550
3.060, 2.880, 2.550
3.060, 2.880, 2.550
4.625, 4.375, 4.125
4.625, 4.375, 2.720
RESET Time
(ms)
150
150
150
150
150
150
350
350
Output
Stage
Push-Pull
Open-Drain
Push-Pull
Push-Pull
Open-Drain
Push-Pull
Open-Drain
Open-Drain
RESET
Polarity
LOW
LOW
HIGH
LOW
LOW
HIGH
LOW
LOW
Key Features
x Improved Dallas DS1815 replacement
— Over 50% lower maximum supply current
x Low Supply Current
— 20µA maximum (5.5V)
— 15µA maximum (3.6V)
x Automatically restarts a microprocessor after
power failure
x 150ms reset delay after VCC returns to an
in-tolerance condition
x Active LOW power-up reset
x Precision temperature-compensated voltage
reference and comparator
x Eliminates external components
x Low-cost TO-92 package
x Compact surface mount SOT-23 package
x Push-Pull output for minimum current drain
x Operating temperature – 40°C to +85°C
Applications
x Set-top boxes
x Cellular phones
x PDAs
x Energy management systems
x Embedded control systems
x Printers
x Single board computers
Block Diagram
VCC
1
Supply
Tolerance
Bias
+
–
Reference
© 1999 IMP, Inc.
IMP1815
VCC
IMP1815
Delay
150ms Typical
3
GND
2 RESET
RESET
GND
1815_01.eps
408-432-9100/www.impweb.com
Typical Application
Microprocessor
RESET
1815_02.eps
1
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