AME8570M Datasheet, PDF (1/25 Pages) Analog Microelectronics – Manual Reset Input Option

AME
AME8570M
n General Description
The AME8570M family allows the user to customize
the CPU reset function without any external components.
The user has serveral choice of reset voltage thresholds,
reset time intervals, and output driver configurations, all
of which are preset at the factory.
These circuits monitor the power supply voltage of µP
based systems. When the power supply voltage drops
below the voltage threshold a reset is asserted immedi-
ately
after
( within an
the supply
interval
voltage
Tris_D1e)s.
The reset
above the
remains asserted
voltage threshold
faocrtiavetimhieghin(teRrvEaSl,ETT_D2).
The reset output may be either
or active low ( RESETB ). The
reset output may be configured as either push/pull or
open drain. The state of the reset output is guaranteed
to be correct only when supply voltage is greater than
1V.
The AME8570M also provide a reset manually by pull-
ing the MRB input to ground.
Space saving SC-70 package and micropower quies-
cent current (<3.0µA ) make this family a natural for por-
table battery powered equipment.
n Features
l Small Packages : SC-70-4, SOT-23,
TSOT-23A, SOT-25, TSOT-25A, SOT-143
l Tight Voltage Threshold Tolerance:¡Ó1.50%
l Wide Temperature Range : -40^OC to +85^OC
l Low Quiescent Current <3.0µA
l Manual Reset Input Option
l Green Products Meet RoHS Standards
n Applications
l Portable Electronics
l Power Supplies
l Computer Peripherals
l Data Acquisition Systems
l Applications using CPUs
l Consumer Electronics
Rev. A.14
µProcessor Supervisory
n Functional Block Diagram
AME8570M Push-Pull RESET/ RESETB
IN
R1 _I1
GND
R2
V REF
Delay
P1
RESET/
RESETB
N1
AME8570M Open-Drain RESET/RESETB
IN
R1 ^I1
R2
VREF
Delay
RESET/
RESETB
N1
AME8570M Push-Pull RESET/ RESETB with MRB
MRB
IN
R1 I1
P1
GND
R2
VREF
Delay
N1
RESET/
RESETB
AME8570M Open-Drain RESET/RESETB with MRB
MRB
IN
R1 I1
GND
R2
VREF
Delay
RESET/
RESETB
N1
1