Impala Linear Corporation
ILC809/ILC810
3-Pin µP Voltage Monitor
October 1999
General Description
The ILC809/ILC810 is a low cost microprocessor supervisory
circuit that asserts a reset if the power supply drops below a
designated threshold. Several different reset thresholds are
available to accommodate systems operating at 3 V, 3.3 V or
5 V.
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 140 ms
after V
CC
has risen above the designated reset threshold. The
ILC809/ILC810 is available in a 3-pin SOT-23 package.
Features
Precision Voltage Monitor for 3 V, 3.3 V or 5 V Power
Supplies
6 µA Supply Current
140 ms 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
Applications
Critical Microprocessor Power Monitoring
Portable Equipment
Intelligent Instruments
Computers & Printers
Controllers
Typical Circuit
V
CC
Ordering Information
Part
ILC809_U
V
CC
V
CC
Package
3-Lead SOT-23
3-Lead SOT-23
Temp. Range
-40°C to +85°C
-40°C to +85°C
ILC810_U
ILC809
ILC810
RESET
(RESET)
RESET
INPUT
Place the device suffix of desired reset threshold voltage from
the table below in the blank to complete the part number.
µP
Reset Threshold Voltage (V)
4.63
4.38
4.00
Device Suffix
L
M
J
T
S
R
( ) = ILC810
3.08
2.93
2.63
Pin - Package Configurations
Top View
GND
1
ILC809
RESET
2
3
GND
1
V
CC
RESET
2
ILC810
3
V
CC
Impala Linear Corporation
(408) 730-3778
www.impalalinear.com
1
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