AS1916_1 AMSCO [austriamicrosystems AG], AS1916_1 Datasheet

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AS1916_1

Manufacturer Part Number
AS1916_1
Description
AS1916 - AS1918
Manufacturer
AMSCO [austriamicrosystems AG]
Datasheet
1.AS1916_1.pdf (13 pages)
A S 1 9 1 6 - A S 1 9 1 8
M i c r o p r o c e s s o r S u p e r v i s o r y C i r c u i ts w i t h M a n u a l
R e s e t a n d Wa t c h d o g
1 General Description
The AS1916 - AS1918 microprocessor supervisory cir-
cuits were designed to generate a reset when the moni-
tored supply voltage falls below a factory-trimmed
threshold. The reset remains asserted for a minimum
timeout period after the supply voltage stabilizes.
Guaranteed to be in the correct state for V
+1.0V, these devices are ideal for portable and battery-
powered systems with strict monitoring requirements.
The devices feature factory-trimmed thresholds to moni-
tor a supply voltage between 1.8 and 3.6V.
The devices are available with the reset output types
listed in
Table 1. Standard Products
The AS1916 - AS1918 include a manual-reset input for
systems that never fully power down the microproces-
sor.
Additionally, these devices feature a watchdog timer to
help ensure that the processor is operating within proper
code boundaries.
The AS1916 - AS1918 are available in a 5-pin SOT23
package.
Figure 1. Typical Application Diagram
www.austriamicrosystems.com
AS1916
AS1917
AS1918
Table
Model
1.
External
Reset
V
CC
Active-Low Open-Drain
Active-High Push/Pull
Active-Low Push/Pull
Reset Output Type
MRN
V
CC
5
3
CC
higher than
AS1916/
AS1918
GND
2
Revision 1.00
1
RESETN
4
WDI
2 Key Features
3 Applications
The devices are ideal for portable and battery-powered
systems, embedded controllers, intelligent instruments,
automotive systems, and critical CPU monitoring appli-
cations.
!
!
!
!
!
!
!
!
!
!
- Active-Low Push/Pull (AS1916)
- Active-High Push/Pull (AS1917)
- Active-Low Open-Drain (AS1918)
V
Guaranteed Reset Valid Down to V
Reset Timeout Delay: 215ms
Manual Reset Input
Three Reset Output Types
Watchdog Timeout Period: 1.5s
Immune to Fast Negative V
External Components Not Required
Operating Temperature Range: -40 to +125°C
5-pin SOT23 Package
CC
Supervisory Range: +1.8 to +3.6V
RESETN
I/O
I/O Supply
CPU
GND
CC
Transients
CC
= +1.0V
D a t a S h e e t
1 - 13

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AS1916_1 Summary of contents

Page 1

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Page 2

AS1916 - AS1918 Data Sheet - Pinout Pin Assignments Figure 2. Pin Assignments (Top View) RESETN/RESET Pin Descriptions Table 2. Pin Descriptions Pin Pin Number Name Active-Low Reset Output (AS1916, AS1918). The RESETN ...

Page 3

AS1916 - AS1918 Data Sheet - Absolute Maximum Ratings Stresses beyond those listed in Table 3 and ...

Page 4

AS1916 - AS1918 Data Sheet - Electrical Characteristics V = +2.7 to +3.6V for ...

Page 5

AS1916 - AS1918 Data Sheet - Table 4. Electrical Characteristics (Continued) 1 Symbol Parameter RESET ...

Page 6

AS1916 - AS1918 Data Sheet - Typical Operating Characteristics ...

Page 7

AS1916 - AS1918 Data Sheet - Detailed Description The AS1916 - AS1918 supervisory circuits were designed to generate a reset ...

Page 8

AS1916 - AS1918 Data Sheet - Watchdog Input The integrated watchdog feature can be used to monitor processor activity via pin ...

Page 9

AS1916 - AS1918 Data Sheet - Application Information Watchdog Input Current The watchdog input is driven through ...

Page 10

AS1916 - AS1918 Data Sheet - Figure 13 shows a flowchart where the input/output driving the watchdog is ...

Page 11

AS1916 - AS1918 Data Sheet - Package Drawings and Markings The devices are ...

Page 12

AS1916 - AS1918 Data Sheet - Ordering Information The devices are available as the standard products shown in Table 5. ...

Page 13

AS1916 - AS1918 Data Sheet Copyrights Copyright © 1997-2007, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered ®. All rights reserved. The material herein may not be reproduced, adapted, merged, trans- lated, stored, or used without the prior written ...

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