Document Outline
- Cover
- Cross Reference
- IMP1810
- IMP1811
- IMP1812
- IMP1815
- IMP1816
- IMP1817
- IMP1233D
- IMP1233M
- Package Information
Supervisors
POWER
MANAGEMENT
408-432-9100/www.impweb.com
IMP1
IMP1
8
8
1
1
0 -- Lo
0 -- Lo
w P
w P
o
o
w
w
er
er
, 5V
, 5V
P R
P R
eset
eset
Active LOW, Push-Pull Output
IMP1
IMP1
8
8
1
1
1 -- Lo
1 -- Lo
w P
w P
o
o
w
w
er
er
, 5V
, 5V
P R
P R
eset
eset
Active LOW, Open-Drain Output
IMP1
IMP1
8
8
1
1
2 -- Lo
2 -- Lo
w P
w P
o
o
w
w
er
er
, 5V
, 5V
P R
P R
eset
eset
Active HIGH, Push-Pull Output
IMP1
IMP1
8
8
1
1
5 -- Lo
5 -- Lo
w P
w P
o
o
w
w
er
er
, 3.3V/3.0V
, 3.3V/3.0V
P R
P R
eset
eset
Active LOW, Push-Pull Output
IMP1
IMP1
8
8
1
1
6 -- Lo
6 -- Lo
w P
w P
o
o
w
w
er
er
, 3.3V/3.0V
, 3.3V/3.0V
P R
P R
eset
eset
Active LOW, Open-Drain Output
IMP1
IMP1
8
8
1
1
7 -- Lo
7 -- Lo
w P
w P
o
o
w
w
er
er
, 3.3V/3.0V
, 3.3V/3.0V
P R
P R
eset
eset
Active HIGH, Push-Pull Output
IMP1
IMP1
233D -- Lo
233D -- Lo
w P
w P
o
o
w
w
er
er
, 5V
, 5V
P R
P R
eset
eset
Active LOW, Open-Drain Output
IMP1
IMP1
233M -- Lo
233M -- Lo
w P
w P
o
o
w
w
er
er
, 5V/3.0V
, 5V/3.0V
P R
P R
eset
eset
Active LOW, Open-Drain Output
The part numbers and descriptions are linked to the data sheet.
408-432-9100/www.impweb.com
1999 IMP, Inc.
P Supervisor Products: Low Power Alternatives to Dallas Semiconductor
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_
B
/
D
L
E
P Super
P Super
visor Cr
visor Cr
oss R
oss R
ef
ef
er
er
ence
ence
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 DS1810 replacement
-- 50% lower maximum supply current
x
Low Supply Current
-- 20A maximum (5.5V)
x
Automatically restarts a microprocessor after
power failure
x
150ms reset delay after V
CC
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
Block Diagram
+
1810_01.eps
V
CC
1
RESET
GND
3
2
Supply
Tolerance
Bias
IMP1810
Delay
150ms Typical
Reference
IMP1
IMP1
8
8
1
1
0
0
P
OWER
M
ANAGEMENT
Lo
Lo
w P
w P
o
o
w
w
er
er
, 5V
, 5V
P R
P R
eset
eset
A
A
ctiv
ctiv
e L
e L
O
O
W
W
, Push-Pull Output
, Push-Pull Output
The IMP1810 supply voltage monitor is an improved, low-power
replacement for the Dallas Semiconductor DS1810. Maximum supply
current over temperature is a low 20
A, representing 50 percent lower
power as compared to the DS1810.
The IMP1810 issues an active LOW reset signal whenever the monitored
supply is out-of-tolerance. A precision reference and comparator circuit
monitor power supply (V
CC
) 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 V
CC
returns to an in-tolerance condition, the reset signal remains
active for 150ms to allow the power supply and system microprocessor
to stabilize.
The IMP1810 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 IMP1811/12/15/16/17,
IMP1233D and IMP1233M.
Typical Application
IMP1810
Microprocessor
RESET
RESET
1810_02.eps
VCC
GND
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L
Family Selection Guide
2
408-432-9100/www.impweb.com
1999 IMP, Inc.
Pin Configuration
IMP1
IMP1
8
8
1
1
0
0
Pin Descriptions
Pin Number
Name
Function
1
RESET
Active LOW reset output
2
V
CC
Power supply input
3
GND
Ground
IMP1810-X
RESET
V
CC
GND
3
1
2
1810_03.eps
Package Marking Code
Ordering Information
1810_04.eps
1
2
3
IMP1810-X
SOT23
TO-92*
1810_05a.eps
3
1
2
A
B
C
D
3
2
-
T
O
S
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C
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P
A
B
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a
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R
B
A
0
1
8
1
P
M
I
%
5
B
B
0
1
8
1
P
M
I
%
0
1
B
C
0
1
8
1
P
M
I
%
5
1
s
p
e
.
2
0
t
_
0
1
8
1
*
Add /S to Part Number for straight (unformed) leads. (ie. IMP18xx-x/S)
XX = Date code
**
Add /T to Part Number for Tape and Reel. (ie. IMP18xx-x/T)
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5
1
-
0
1
8
1
P
M
I
2
1
.
4
5
1
0
5
1
W
O
L
5
-
R
0
1
8
1
P
M
I
2
6
.
4
5
0
5
1
W
O
L
B
A
X
X
0
1
-
R
0
1
8
1
P
M
I
7
3
.
4
0
1
0
5
1
W
O
L
B
B
X
X
5
1
-
R
0
1
8
1
P
M
I
2
1
.
4
5
1
0
5
1
W
O
L
B
C
X
X
1999 IMP, Inc.
408-432-9100/www.impweb.com
3
IMP1
IMP1
8
8
1
1
0
0
Absolute Maximum Ratings
Electrical Characteristics
Voltage on V
CC
. . . . . . . . . . . . . . . . . . . . . . . . 0.5V to 7V
Voltage on RESET . . . . . . . . . . . . . . . . . . . . . 0.5V to V
CC
+ 0.5V
Operating Temperature Range . . . . . . . . . . . 40
C to 85
C
Soldering Temperature . . . . . . . . . . . . . . . . . . 260
C for 10 seconds
Storage Temperature . . . . . . . . . . . . . . . . . . . 55
C to 125
C
Voltages measured with respect to ground.
These are stress ratings only and functional operation is not implied.
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Supply Voltage
V
CC
1.2
5.5
V
Output Voltage
V
OH
I
OUT
< 500
A
V
CC
0.5V
V
CC
0.1V
V
Output Current
I
OH
Output = 2.4V, V
CC
2.7V
350
A
Output Current
I
OL
Output = 0.4V, V
CC
2.7V
+10
mA
Operating Current
I
CC
V
CC
< 5.5V, RESET output open
8
20
A
V
CC
Trip Point (IMP1810-5)
V
CCTP
4.50
4.62
4.75
V
V
CC
Trip Point (IMP1810-10)
V
CCTP
4.25
4.37
4.49
V
V
CC
Trip Point (IMP1810-15)
V
CCTP
4.00
4.12
4.24
V
Output Capacitance
C
OUT
10
pF
V
CC
Detect to RESET Low
t
RPD
2
5
s
V
CC
Slew Rate
t
F
300
s
(V
CCTP
(MAX) to V
CCTP
(MIN))
V
CC
Slew Rate
t
R
0
ns
(V
CCTP
(MIN) to V
CCTP
(MAX))
V
CC
Detect to RESET High
t
RPU
t
r
= 5
s
100
150
300
ms
Unless otherwise noted, V
CC
= 1.2V to 5.5V and specifications are over the operating temperature range of 40
C to +85
C.
All voltages are referenced to ground.
Notes 1. The t
F
value is for reference in defining values for t
RPD
and should not be considered a requirement for proper operation or use.
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