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PDF IMP1812 Data sheet ( Hoja de datos )

Número de pieza IMP1812
Descripción Low Power 5V/3.0V P Reset
Fabricantes IMP Inc 
Logotipo IMP  Inc Logotipo



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IMP1233D
POWER MANAGEMENT
Low Power, 5V µP Reset
– Active LOW, Open-Drain Output
– 350ms Reset Period
The IMP1233D supply voltage monitor is an improved, low-power
replacement for the Dallas Semiconductor DS1233D. Maximum supply
current over temperature is a low 20µA, representing over 60 percent
lower power as compared to the DS1233D.
The IMP1233D issues an active LOW 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 15-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 350ms to allow the power supply and system micro-
processor to stabilize.
The IMP1233D is designed with a open-drain output stage and operates
over the extended industrial temperature range. Devices are available in
compact surface mount SOT-223 packages.
Other low power products in this family include the IMP1810/11/12/15/
16/17 and IMP1233M.
Key Features
N Improved Dallas DS1233D replacement
— Over 60% lower maximum supply current
N Low Supply Current
— 20µA maximum (5.5V)
— 15µA maximum (3.6V)
N Automatically restarts a microprocessor after
power failure
N 350ms reset delay after VCC returns to an
in-tolerance condition
N Active LOW power-up reset, 5kinternal pull-up
N Precision temperature-compensated voltage
reference and comparator
N Eliminates external components
N Motorola 68xxx and HC16 compatible
N Compact surface mount SOT-223 package
N Operating temperature – 40°C to +85°C
Family Selection Guide
Applications
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
N Set-top boxes
N Cellular phones
N PDAs
N Energy management systems
N Embedded control systems
N Printers
N Single board computers
Block Diagram
Typical Application
VCC
Supply
Tolerance
Bias
+
Reference
IMP1233D
Delay
350ms Typical
5.0k9
RESET
VCC
IMP1233D
RESET
GND
Microprocessor
RESET
2000 © IMP, Inc.
GND
1233D_01.eps
408-432-9100/www.impweb.com
1233D_02.eps
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IMP1812 pdf
IMP1233D
Plastic SOT-223 (4-Pin)
B
EH
Se
A
A1
D
B1
e1
Q1
Q
Q2 C
SOT-223 (4-Pin).eps
Package Dimensions
Inches
Millimeters
Min Max Min Max
Plastic SOT-223* (4-Pin)
A 0.067
0.060
1.70
1.50
A1 0.004
0.0008
0.10
0.02
B 0.124
0.116
3.15
2.95
B1 0.033
0.026
0.85
0.65
C 0.014
0.010
0.35
0.25
D 0.264
0.248
6.70
6.30
e 0.0905 NOM
2.30 NOM
e1 0.181 NOM
4.50 NOM
E 0.146
0.130
3.70
3.30
h 0.287
0.264
7.30
6.70
S 0.041
0.033
1.05
0.85
t 0.051
0.043
1.30
1.10
Q 10° MAX
10° MAX
Q1 16° 10° 16° 10°
Q2 16° 10° 16° 10°
* Formed leads are standard.
1233D_t05.eps
2000 © IMP, Inc.
Microprocessor Supervisor
5

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