IN1705D
P
OWER SUPPLY CHECK MICROCIRCUIT WITH HOST PRIMARY SUPPLY
MONITORING CIRCUIT
IN1705D microcircuit is purposed to check power supply and to start up microcontroller
and microprocessor systems. It is applied to ensure regular standard operation of the circuit
when the device is switched on\off and also when there is alarm emergency dropping of
supply voltage.
Physically the microcircuit is made in 8-pin SO-package MS012AA.
LSIIC Characteritics:
•
Standard supply voltage
5,0
В
•
Operation temperature range
Т
A
= from -40°to +85°С
•
RESET signal generation when power supply is provided for regular start-up of
microprocessor
RESET signal generation when power supply is dropped below operation one to exclude
incorrect operation of microprocessor.
•
RESET signal generation when reset key is pressed
•
Option of threshold voltage programming when RESET signal is generated
Microcircuit includes:
•
reference voltage source
•
two analog comparators
•
guard timer
•
digitizer, (digital sampler)
•
digital delay
Functions performed
•
RESET signal generation by fixed supply voltage level
•
RESET signal generation from external RESET key
•
Generation of guard timer state signal
Alarm interrupt of host power supply
Pins’ designation in package
Architecture diagramme
IN
Reference
voltage
source
Ucc
______
PBRST
__
ST
+
-
Digitizer
____
NMI
-
+
Digitizer
Digital
delay
____
RST
Schmitt trigger
Guard timer
____
WDS
Microcircuit pins’ purpose
1
INTEGRAL [ INTEGRAL CORP. ]
