ILC803
ILC809
ILC810
P
V
CC
V
CC
V
CC
RESET
RESET
INPUT
(RESET)
( ) = ILC810
The ILC803, ILC809 and ILC810 are low cost microproces-
sor supervisory circuits that assert a reset if the power sup-
ply drops below a designated threshold. Several different
reset thresholds are available to accommodate systems
operating at 3V, 3.3V or 5V.
The ILC803 has an open drain output stage with active
low RESET output
The ILC809 has an active low RESET output, while
the ILC810 offers an active high RESET output. The
reset output is guaranteed to remain asserted for a
minimum of 140ms after V
CC
has risen above the des-
ignated reset threshold. The ILC803, ILC809 and
ILC810 are available in either a 3-Pin SOT-23 pack-
age or a 3-Pin SC-70 packages.
ILC803/ILC809/ILC810
3-Pin P Voltage Monitor
Impala Linear Corporation
Impala Linear Corporation
1
(408) 574-3939
www.impalalinear.com
Sept 1999
ILC803/809/810 1.5
Preliminary
Temp. Range
-40C to +85C
-40C to +85C
-40C to +85C
-40C to +85C
-40C to +85C
-40C to +85C
Precision Voltage Monitor for 3V, 3.3V or 5V
Power Supplies
6
A Supply Current
140ms Minimum Reset Pulse Width
RESET Remains Valid with V
CC
as Low as 1.4V
Active Low Manual Reset Input
No External Components
3-Pin SOT-23 Package
3-Pin SC-70 package option
Critical Microprocessor Power Monitoring
Portable Equipment
Intelligent Instruments
Computers & Printers, Controllers
ILC803
ILC809
V
CC
Top View
RESET
GND
2
1
3
ILC810
V
CC
RESET
GND
2
1
3
Reset Threshold Voltage (V)
Device Suffix
4.63
L
4.38
M
4.00
J
3.08
T
2.93
S
2.63
R
Ordering Information
Part
ILC803_U
ILC809_U
ILC810_U
ILC803_W
ILC809_W
ILC810_W
Package
3-Lead SOT-23
3-Lead SOT-23
3-Lead SOT-23
3-Lead SC-70
3-Lead SC-70
3-Lead SC-70
General Description
Package Features
Applications
Typical Circuit
Pin Package Configurations
SC-70
SOT-23
Place the device suffix of the desired reset threshold voltage from the table [below]
in the blank to complete the part number.
V
CC
= 5V for ILC8__L/M/J, V
CC
= 3.3V for ILC8__S/T, V
CC
= 3V for ILC8__R, T
A
= Operating Temperature Range, unless otherwise noted.
Parameter
Conditions
Min
Typ
Max
Units
Operating Voltage Range, V
CC
T
A
= 0C to 70C
T
A
= -40C to 85C
1.4
1.6
5.5
5.5
V
Supply Current, I
CC
ILC803L/M/J, ILC809L/M/J, ILC810L/M/J
V
CC
< 3.6V, ILC803R/S/T, ILC809R/S/T, ILC810R/S/T
9
6
15
10
A
Reset Voltage Threshold, V
TH
ILC803L, ILC809L, ILC810L
ILC803M, ILC809M, ILC810M
ILC803J, ILC809J, ILC810J
ILC803T, ILC809T, ILC810T
ILC803S, ILC809S, ILC810S
ILC803R, ILC809R, ILC810R
4.50
4.25
3.89
3.00
2.85
2.55
4.63
4.38
4.00
3.08
2.93
2.63
4.75
4.50
4.10
3.15
3.00
2.70
V
Reset Timeout Period, t
R
140
240
560
ms
V
CC
= V
TH
I
SINK
= 1.2mA
0.3
V
RESET Output Voltage Low
(Active low ILC803 & 809) V
OL
V
CC
=V
TH
I
SINK
= 3.2mA
0.4
V
RESET Open Drain Output
Leakage Current
V
CC
> V
TH
RESET Deasserted
7
A
RESET Output Voltage V
OH
I
SOURCE
= 800
A, ILC809L/M/J
I
SOURCE
= 500
A, ILC809R/S/T
V
CC
1.5
0.8 x V
CC
V
RESET Output Voltage, V
OL
V
CC
= V
TH
Min., I
SINK
= 3.2 mA, ILC809L/M/J
V
CC
= V
TH
Min., I
SINK
= 1.2 mA, ILC809R/S/T
V
CC
> 1.4 V, I
SINK
= 50
A, T
A
= 0C to 70C
V
CC
> 1.6 V, I
SINK
= 50
A, T
A
= -40C to 85C
0.4
0.3
0.3
0.3
V
RESET Output Voltage, V
OH
1.8V < V
CC
< V
TH
Min., I
SOURCE
= 150
A
0.8 x V
CC
V
RESET Output Voltage, V
OL
I
SINK
= 3.2mA, ILC810L/M/J
I
SINK
= 1.2mA, ILC810R/S/T
0.4
0.3
V
3-Pin P Voltage Monitor
Impala Linear Corporation
2
(408) 574-3939
www.impalalinear.com
Sept 1999
ILC803/809/810 1.5
Preliminary
Parameter
Symbol
Ratings
Units
Terminal Voltage
V
CC
-0.3 to 6.0
V
Input Current
V
CC
20
mA
Output Current
RESET, RESET
20
mA
Rate of Rise
V
CC
100
V/
s
Operating Temperature Range
T
A
-40 to +85
C
Storage Temperature Range
-65 to +150
C
Lead Temperature (Soldering, 10 sec.)
300
C
Power Dissipation (T
A
= +70C)
320
mW
Stresses above those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent device failure. Functionality at
or above these limits is not implied. Exposure to absolute maximum ratings for extended periods may affect device reliabil-
ity. Operating ranges define those limits between which the functionality of the device is guaranteed.
Pin Number
Pin Name
ILC803
ILC809
ILC810
Description
GND
1
1
1
Ground Pin.
RESET
2
2
N/A
RESET goes low if V
CC
falls below the reset
threshold and remains asserted for one reset timeout
period (140ms min.) after V
CC
exceeds the reset
threshold.
RESET
N/A
N/A
2
RESET goes high if V
CC
falls below the reset
threshold and remains asserted for one reset timeout
period (140ms min.) after V
CC
exceeds the reset
threshold.
V
CC
4
3
3
Power supply input, 3 V, 3.3 V or 5 V.
Absolute Maximum Ratings
Electrical Characteristics
Pin Functions
3-Pin P Voltage Monitor
Impala Linear Corporation
3
(408) 574-3939
www.impalalinear.com
Sept 1999
ILC803/809/810 1.5
Preliminary
V
CC
Transients
The ILC803, ILC809 and ILC810 are relatively immune to
negative-going V
CC
glitches below the reset threshold.
Typically, a negative-going transient 125mV below the reset
threshold with a duration of 50
s (25
s for ILC8__R/S/T) or
less will not cause an unwanted reset.
Interfacing to Bi-directional Reset Pins
The ILC803/ILC809/ILC810 can interface with
Ps with bi-
directional reset pins by connecting a 4.7k
resistor in
series with the ILC803/ILC809/ILC810 output and the mP
reset pin. ILC803 connects directly with a single pull-up
resistor (figure 2).
RESET Valid to 0V
A resistor can be added from the RESET pin to ground to
ensure the RESET output remains low with V
CC
down to
0V. A 100k
resistor connected from RESET to ground is
recommended. The size of the resistor should be large
enough to not load the RESET output and small enough to
pull-down any stray leakage currents.
ILC803
ILC809
P
V
CC
V
CC
V
CC
RESET
RESET
100K
ILC803
only
100K
ILC809
only
Industry P/N
ILC Direct
Replacement
MAX803XYUR-T
ILC803YU
MAX809JEUR-T
ILC809JU
MAX809LEUR-T
ILC809LU
MAX809MEUR-T
ILC809MU
MAX809REUR-T ILC809RU
MAX809SEUR-T ILC809SU
MAX809TEUR-T ILC809TU
MAX810JEUR-T
ILC810JU
MAX810LEUR-T
ILC810LU
MAX810MEUR-T ILC810MU
MAX810REUR-T ILC810RU
MAX810SEUR-T ILC810SU
MAX810TEUR-T ILC810TU
SC-70 Case
SOT-23 Case
ILC803J
QJY
QJYY
ILC803L
QLY
QLYY
ILC803M
QMY
QMYY
ILC803R
QRY
QRYY
ILC803S
QSY
QSYY
ILC803T
QTY
QTYY
ILC809J
VJY
VJYY
ILC809L
VLY
VLYY
ILC809M
VMY
VMYY
ILC809R
VRY
VRYY
ILC809S
VSY
VSYY
ILC809T
VTY
VTYY
ILC810J
ZJY
ZJYY
ILC810L
ZCY
ZCYY
ILC810M
ZMY
ZMYY
ILC810R
ZRY
ZRYY
ILC810S
ZSY
ZSYY
ILC810T
ZTY
ZTYY
Y-LOT CODE
YY-LOT CODE
3
Reset
Generator
2
1
-
+
Reset
Threshold (V)
V
CC
RESET (ILC803, ILC809
RESET (ILC810)
GND
V
TH
V
CC
t
R
RESET
t
R
Microprocessor Reset
The RESET pin is asserted whenever V
CC
falls below the
reset threshold voltage. The reset pin remains asserted for
a period of 240ms after V
CC
has risen above the reset
threshold voltage. The reset function ensures the micro-
processor is properly reset and powers up into a known
condition after a power failure. RESET will remain valid
with V
CC
as low as 1.4V.
Figure 1: Timing Diagram
Figure 2: Reset valid to V
CC
Figure 3: Block Diagram
Circuit Description
Alternate Source Cross Reference Guide
Device Markings Information
3-Pin P Voltage Monitor
Impala Linear Corporation
4
(408) 574-3939
www.impalalinear.com
Sept 1999
ILC803/809/810 1.5
Preliminary
0.120
0.105
0.079
0.071
0.004
0.001
0.040
0.031
0.021
0.015
0.055
0.047
0.098
0.083
0.010
0.005
0.0059
0.0035
0-8
Packaging Information
.053
.045
.087
.079
.043
.032
.004
.018
.006
.010
.004
.009
.005
.026
.051
.016
.012
.087
.071
W Package, 3-Pin SC-70
Dimensions are in inches
U Package, 3-Pin SOT-23
Dimensions are in inches
3-Pin P Voltage Monitor
Impala Linear Corporation
5
(408) 574-3939
www.impalalinear.com
Sept 1999
ILC803/809/810 1.5
Preliminary
Devices sold by Impala Linear Corporation are covered by the warranty and patent indemnification provisions appearing
in its Terms of Sale only. Impala Linear Corporation makes no warranty, express, statutory, implied, or by description
regarding the information set forth herein or regarding the freedom of the described devices from patent infringement.
Impala Linear Corporation makes no warranty of merchantability or fitness for any purpose. Impala Linear Corporation
reserves the right to discontinue production and change specifications and prices at any time and without notice.
This product is intended for use in normal commercial applications. Applications requiring an extended temperature
range, unusual environmental requirements, or high reliability applications, such as military and aerospace, are specif-
ically not recommended without additional processing by Impala Linear Corporation.
Impala Linear Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in an
Impala Linear Corporation product. No other circuits, patents, licenses are implied.
Life Support Policy
Impala Linear Corporation's products are not authorized for use as critical components in life support devices or systems.
1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for
use provided in the labelling, can be reasonably expected to result in a significant injury to the user.
2. A critical component is any component of a life support device or system whose failure to perform can be reason-
ably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.
O1.5 0.1
3.5 0.05
8.0 0.3
1.75 0.1
4.0 0.1
2.0 0.05
4.0 0.1
O1.1 0.1
3.1 0.1
1.2 0.1
2.7 0.1
Dimensions are in millimeters
Tape and Reel Information
Diagram applies to SOT-23 and SC-70
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