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AS1910_1

Description
Dual-Voltage Microprocessor Supervisory Circuits with Manual Reset and Watchdog
File Size339KB,16 Pages
ManufacturerAMS
Websitehttps://ams.com/zh
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AS1910_1 Overview

Dual-Voltage Microprocessor Supervisory Circuits with Manual Reset and Watchdog

Datasheet
AS1910 - AS1915
D u a l - Vo l t a g e M i c r o p r o c e s s o r S u p e r v i so r y C i r c u i t s w i t h M a n u a l R e s e t
a n d Wat c h d o g
1 General Description
The AS1910 - AS1915 microprocessor supervisory circuits were
designed to generate a reset when one of the two monitored supply
voltages falls below a factory-trimmed threshold, and to maintain the
reset for a minimum timeout period when both supplies are above
their reset thresholds. Guaranteed to be in the correct state for V
CC
higher than +1.0V, these devices are ideal for multiple-voltage
systems with strict monitoring requirements.
The AS1913/AS1914/AS1915 feature factory-trimmed thresholds to
monitor a primary voltage between 1.8 and 3.6V, and a secondary
voltage between 0.9 and 2.5V.
For the AS1910/AS1911/AS1912, a secondary monitoring voltage
can be user-adjusted via an external resistor divider down to 0.6V.
The devices are available with the reset output types listed in
Table
1.
Table 1. Standard Products
Model
AS1910/AS1913
AS1911/AS1914
AS1912/AS1915
Reset Output Type
Active-Low Push/Pull
Active-High Push/Pull
Active-Low Open-Drain
2 Key Features
Primary V
CC
Supervisory Range: +1.8 to +3.6V
Secondary V
CC
Supervisory Range: +0.9 to +2.5V (AS1913/
AS1914/AS1915)
User-Adjustable Threshold Down to +0.63V (AS1910/AS1911/
AS1912)
Guaranteed Reset Valid Down to V
CC
= +1.0V
Reset Timeout Delay: 215ms
Manual Reset Input
Three Reset Output Types:
- Active-High Push/Pull
- Active-Low Push/Pull
- Active-Low Open-Drain
Watchdog Timeout Period: 1.5s
Immune to Fast Negative V
CC
Transients
External Components Not Required
Operating Temperature Range: -40 to +125ºC
6-pin SOT23 Package
The AS1910 - AS1915 include a manual-reset input for systems that
never fully power down the microprocessor. Additionally, these
devices feature a watchdog timer to help ensure that the processor is
operating within proper code boundaries.
The AS1910 - AS1915 are available in a 6-pin SOT23 package.
Figure 1. Typical Application Diagram
3 Applications
The devices are ideal for portable and battery-powered systems,
embedded controllers, intelligent instruments, automotive systems,
critical CPU monitoring, and any multi-supply application.
V
CC
6
VCC
Core
Supply
I/O Supply
V
CC2
5
VCC2
3
AS1913/
AS1915
1
RESETN
4
WDI
I/O
RESETN
CPU
External
Reset
MRN
GND 2
GND
www.austriamicrosystems.com/Supervisors/AS1910
Revision 1.03
1 - 16

AS1910_1 Related Products

AS1910_1 AS1910 AS1911 AS1913 AS1914 AS1912 AS1915 AS1913TZ-T
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