ILC705 Datasheet, PDF (1/5 Pages) Impala Linear Corporation – MP SUPERVISORY CIRCUIT

Impala Linear Corporation
ILC705/706/707/708
mP Supervisory Circuit
General Description
The ILC705/ILC706/ILC707/ILC708 are low cost micro-
processor supervisory circuits that monitor power sup-
plies in microprocessor based systems. Circuit functions
include a watchdog timer, microprocessor reset, power
failure warning and a debounced manual reset input.
The ILC705 and ILC706 offer a watchdog timer function
while the ILC707 and ILC708 have an active high reset
output in addition to the active low reset output.
Features
! 4.4V or 4.65V Precision Voltage Monitor
! 200ms Reset Pulse Width
! Debounced TTL/CMOS Compatible Manual Reset Input
! Watchdog Timer with 1.6 sec Timeout (ILC705/ILC706)
! Voltage Monitor for Early Power Fail Warning or Low
Battery Detect
! 8-Pin SOIC or DIP Package
Supply voltage monitor levels of 4.65V and 4.4V are
available. The ILC705/ILC707 have a nominal reset
threshold level of 4.65V while the ILC706 and ILC708
have a 4.4V nominal reset threshold level. When the sup-
ply voltage drops below the respective reset threshold
level, RESET is asserted.
Applications
! Computers
! Controllers
! Critical Microprocessor Power Monitoring
! Intelligent Instruments
! Portable Equipment
! Controllers
Pin Package Configuration
Typical Circuit
Top View
MR 1
VCC 2
GND 3
PFI ⁴
ILC705
ILC706
8 WDO
7 RESET
6 WDI
5 PFO
MR 1
VCC 2
GND 3
PFI ⁴
ILC707
ILC708
8 _RESET
7 _RESET
6 NC
5 PFO
N Package - 8 Lead Plastic DIP Package
M Package - 8 Lead Plastic SOIC Package
Manual
Reset
DC Voltage
(Unregulated)
+5 V (Regulated)
VCC
MR
RESET
ILC705
ILC706
WDI
WDO
PFI GND PFO
VCC
RESET
µP
I/O Line
NMI
Interrupt
Ordering Information
Part
ILC70_N
ILC70_M
Package
8-Lead PDIP
8-Lead SOIC
Temp. Range
-40°C to +85°C
-40°C to +85°C
Impala Linear Corporation
ILC705-708 1.0
[phone] www.impalalinear.com
Sept 1999 1