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IMP1817 Datasheet(PDF) 23 Page - A1 PROs co., Ltd.

Part # IMP1817
Description  Low Power,, 5V - Ressett- Acttiive LOW,, Open--Draiin Outtputt
PDF  36 Pages
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Manufacturer  A1PROS [A1 PROs co., Ltd.]
Direct Link  http://www.a1pros.co.kr
Logo A1PROS - A1 PROs co., Ltd.

IMP1817 Datasheet(HTML) 23 Page - A1 PROs co., Ltd.

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©
1999 IMP, Inc.
408-432-9100/www.impweb.com
1
Key Features
Applications
x
Set-top boxes
x
Cellular phones
x
PDAs
x
Energy management systems
x
Embedded control systems
x
Printers
x
Single board computers
x
Improved Dallas DS1817 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 HIGH 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
Block Diagram
–
+
1817_01.eps
VCC
1
RESET
GND
3
2
Supply
Tolerance
Bias
IMP1817
Reference
Delay
150ms
Typical
IMP1
IMP1881177
POWER MANAGEMENT
Lo
Low P
w Po
ow
wer
er, 3.3V/3.0V
, 3.3V/3.0V µ
µP R
P Reset
eset
– A
– Activ
ctive HIGH, Push-Pull Output
e HIGH, Push-Pull Output
The IMP1817 supply voltage monitor is an improved, low-power
replacement for the Dallas Semiconductor DS1817. Maximum supply
current over temperature is a low 15
µA, representing over 50 percent
lower power as compared to the DS1817.
The IMP1817 issues an active HIGH reset signal whenever the moni-
tored 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 HIGH reset
signal. After VCC returns to an in-tolerance condition, the reset signal
remains active for 150ms to allow the power supply and system micro-
processor to stabilize.
The IMP1817 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 IMP1810/11/12/15/16,
IMP1233D and IMP1233M.
Typical Application
IMP1817
Microprocessor
RESET
RESET
1817_02.eps
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Family Selection Guide



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