ILC811 Datasheet, PDF (1/5 Pages) Impala Linear Corporation – MICROPROCESSOR RESET CIRCUITS

Impala Linear Corporation
ILC811/812 ^Preliminary
Microprocessor Reset Circuits
General Description
The ILC811/ILC812 is a low cost microprocessor superviso-
ry circuit that asserts a reset if the power supply drops below
a designated threshold or the manual reset pin is forced low.
Several different reset thresholds are available to accom-
modate systems operating at 3V, 3.3V or 5V.
The ILC811 has an active low RESET output, while the
ILC812 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 designated reset threshold.
The ILC811/ILC812 is available in a 4-pin SOT-143
Typical Circuit
VCC
VCC
VCC
Features
! Precision Voltage Monitor for 3V, 3.3V or 5V Power Supplies
! 6mA 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
! 4-Pin SOT-143 Package
Applications
! Critical Microprocessor Power Monitoring
! Portable Equipment
! Intelligent Instruments
! Computers & Printers
! Controllers
ILC811
ILC812
RESET
MR
(RESET)
µP
RESET
INPUT
( ) = ILC812
Ordering Information
Part
ILC811_U
ILC812_U
Package
4-Lead SOT-143
4-Lead SOT-143
Temp. Range
-40°C to +85°C
-40°C to +85°C
Place the device suffix of desired reset threshold voltage from the
table [below] in the blank to complete the part number.
Pin Package Configuration
Top View
GND 1
4 VCC
ILC811
RESET ²
3 _MR
Reset Threshold Voltage (V)
4.63
4.38
4.00
3.08
2.93
2.63
Device Suffix
L
M
J
T
S
R
GND 1
RESET 2
ILC812
4 VCC
3 MR
Impala Linear Corporation
ILC811/812 1.3
[phone] www.impalalinear.com
Sept 1999 1