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Critical Microprocessor Power Monitoring
Portable Equipment
Intelligent Instruments
Computers & Printers, Controllers
Preliminary
General Description
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.
Typical Circuit
V
CC
Ordering Information
V
CC
V
CC
ILC803
ILC809
ILC810
RESET
(RESET)
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
Temp. Range
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
碌
P
RESET
INPUT
( ) = ILC810
Place the device suffix of the desired reset threshold voltage from the table [below]
in the blank to complete the part number.
Pin Package Configurations
Top View
GND
1
ILC803
ILC809
RESET
2
3
GND
1
V
CC
RESET
2
ILC810
3
V
CC
Reset Threshold Voltage (V)
4.63
4.38
4.00
3.08
2.93
2.63
Device Suffix
L
M
J
T
S
R
SC-70
SOT-23
Impala Linear Corporation
ILC803/809/810 1.5
(408) 574-3939
www.impalalinear.com
Sept 1999
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