|
|
PDF ASM1232LP Data sheet ( Hoja de datos )
| Número de pieza | ASM1232LP | |
| Descripción | 5V uP Power Supply Monitor and Reset Circuit | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de ASM1232LP (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
|
No Preview Available !
ASM1232LP, ASM1232LPS
5 V mP Power Supply
Monitor and Reset Circuit
Description
The ASM1232LP/LPS is a fully integrated microprocessor
Supervisor. It can halt and restart a “hung−up” microprocessor, restart
a microprocessor after a power failure. It has a watchdog timer and
external reset override.
A precision temperature−compensated reference and comparator
circuits monitor the 5 V, VCC input voltage status. During power−up or
when the VCC power supply falls outside selectable tolerance limits,
both RESET and RESET become active. When VCC rises above the
threshold voltage, the reset signals remain active for an additional
250 ms minimum, allowing the power supply and system
microprocessor to stabilize. The trip point tolerance signal, TOL,
selects the trip level tolerance to be either 5% or 10%.
Each device has both a push−pull, active HIGH reset output and an
open drain active LOW reset output. A debounced manual reset input,
PBRST, activates the reset outputs for a minimum period of 250 ms.
There is a watchdog timer to stop and restart a microprocessor that is
“hung−up”. The watchdog timeouts periods are selectable: 150 ms,
610 ms and 1200 ms. If the ST input is not strobed LOW before the
time−out period expires, a reset is generated.
Devices are available in 8−pin DIP, 16−pin SO and compact 8−pin
MicroSO packages.
Features
• 5 V Supply Monitor
• Selectable Watchdog Period
• Debounce Manual Push−button Reset Input
• Precision Temperature−compensated Voltage Reference and
Comparator
• Power−up, Power−down and Brown Out Detection
• 250 ms Minimum Reset Time
• Active LOW Open Drain Reset Output and Active HIGH Push−pull
Output
• Selectable Trip Point Tolerance: 5% or 10%
• Low−cost Surface Mount Packages: 8−pin/16−pin SO, 8−pin DIP and
8−pin Micro SO Packages
• Wide Operating Temperature −40°C to +85°C (N Suffixed Devices)
Applications
• Microprocessor Systems
• Computers
• Controllers
• Portable Equipment
• Intelligent Instruments
• Automotive Systems
http://onsemi.com
PDIP−8
P SUFFIX
CASE 646AA
MICRO−8
U SUFFIX
CASE 846AA
SOIC−8
S SUFFIX
CASE 751BD
SOIC−16
S SUFFIX
CASE 751BG
PIN CONFIGURATIONS
PBRST
1
VCC
TD ST
TOL RESET
GND
DIP/SO/MicroSO
(Top View)
1
NC
PBRST
NC
TD
NC
TOL
NC
GND
SO
(Top View)
RESET
NC
VCC
NC
ST
NC
RESET
NC
RESET
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 12 of this data sheet.
© Semiconductor Components Industries, LLC, 2011
August, 2011 − Rev. 3
1
Publication Order Number:
ASM1232LP/D
1 page  
ASM1232LP, ASM1232LPS
Detailed Description
The ASM1232LP/LPS monitors the microprocessor or
micro controller power supply and generates reset signal,
both active HIGH and Active LOW, that halt processor
operation whenever the power supply voltage levels are
outside a predetermined tolerance.
RESET and RESET outputs
RESET is an active HIGH signal developed by a CMOS
push−pull output stage and is the logical opposite to RESET.
RESET is an active LOW signal. It is developed with an
open drain driver. A pull up resistor of typical value 10 kW
to 50 kW is required to connect with the output.
Trip Point Tolerance Selection
The TOL input is used to determine the level VCC can vary
below 5 V without asserting a reset. With TOL connected to
VCC, RESET and RESET become active whenever VCC
falls below 4.5 V. RESET and RESET become active when
the VCC falls below 4.75 V if TOL is connected to ground.
After VCC has risen above the trip point set by TOL,
RESET and RESET remain active for a minimum time
period of 250 ms. On power−down, once VCC falls below the
reset threshold RESET stays LOW and is guaranteed to be
0.4 V or less until VCC drops below 1.2 V. The active HIGH
reset signal is valid down to a VCC level of 1.2 V also.
Tolerance Select
TOL = VCC
TOL = GND
Tolerance
10%
5%
TRIP Point Voltage (V)
Min Nom Max
4.25 4.37 4.49
4.5 4.62 4.74
Figure 3. Timing Diagram: Power Up
Figure 4. Timing Diagram: Power Down
http://onsemi.com
5
5 Page 
ASM1232LP, ASM1232LPS
PACKAGE DIMENSIONS
SOIC−16, 150 mils
CASE 751BG−01
ISSUE O
PIN#1 IDENTIFICATION
TOP VIEW
E1 E
SYMBOL
A
A1
b
c
D
E
E1
e
h
L
θ
MIN
1.35
0.10
0.33
0.19
9.80
5.80
3.80
0.25
0.40
0º
NOM
9.90
6.00
3.90
1.27 BSC
MAX
1.75
0.25
0.51
0.25
10.00
6.20
4.00
0.50
1.27
8º
Dh
A
eb
SIDE VIEW
Notes:
(1) All dimensions are in millimeters. Angles in degrees.
(2) Complies with JEDEC MS-012.
q
L
A1
END VIEW
c
http://onsemi.com
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet ASM1232LP.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| ASM1232LP | 5V uP Power Supply Monitor and Reset Circuit |  Alliance Semiconductor |
| ASM1232LP | 5V uP Power Supply Monitor and Reset Circuit | ON Semiconductor |
| ASM1232LPS | 5V uP Power Supply Monitor and Reset Circuit | Alliance Semiconductor |
| ASM1232LPS | 5V uP Power Supply Monitor and Reset Circuit | ON Semiconductor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |