|
|
PDF MAX6372 Data sheet ( Hoja de datos )
| Número de pieza | MAX6372 | |
| Descripción | Pin-Selectable Watchdog Timers | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de MAX6372 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
|
No Preview Available !
MAX6369–MAX6374
Pin-Selectable Watchdog Timers
General Description
The MAX6369–MAX6374 are pin-selectable watchdog
timers that supervise microprocessor (μP) activity and
signal when a system is operating improperly. During
normal operation, the microprocessor should repeatedly
toggle the watchdog input (WDI) before the selected
watchdog timeout period elapses to demonstrate that
the system is processing code properly. If the μP does
not provide a valid watchdog input transition before the
timeout period expires, the supervisor asserts a watchdog
(WDO) output to signal that the system is not executing
the desired instructions within the expected time frame.
The watchdog output pulse can be used to reset the μP or
interrupt the system to warn of processing errors.
The MAX6369–MAX6374 are flexible watchdog timer
supervisors that can increase system reliability through
notification of code execution errors. The family offers
several pin-selectable watchdog timing options to match
a wide range of system timing applications:
●● Watchdog startup delay: provides an initial delay
before the watchdog timer is started.
●● Watchdog timeout period: normal operating watchdog
timeout period after the initial startup delay.
●● Watchdog output/timing options: open drain (100ms)
or push-pull (1ms).
The MAX6369–MAX6374 operate over a +2.5V to +5.5V
supply range and are available in miniature 8-pin SOT23
packages.
Benefits and Features
●● Precision Watchdog Timer for Critical μP Applications
●● Pin-Selectable Watchdog Timeout Periods
●● Pin-Selectable Watchdog Startup Delay Periods
●● Ability to Change Watchdog Timing Characteristics
Without Power Cycling
●● Open-Drain or Push-Pull Pulsed Active-Low
Watchdog Output
●● Watchdog Timer Disable Feature
●● +2.5V to +5.5V Operating Voltage
●● 8μA Low Supply Current
●● No External Components Required
●● Miniature 8-Pin SOT23 Package
Applications
●● Embedded Control Systems
●● Industrial Controllers
●● Critical μP and Microcontroller (μC) Monitoring
●● Automotive
●● Telecommunications
●● Networking
Functional Diagram
VCC WDI
MAX6369–MAX6374
TRANSITION
DETECTOR
EN
SET 2
SET 1
SET 0
CONTROL
LOGIC
ENABLE
CLEAR
SET WATCHDOG TIMEOUT
SET STARTUP DELAY
WATCHDOG
TIMER CIRCUITRY
GND
OUT
OUTPUT
WDO
19-1676; Rev 7; 1/16
1 page  
MAX6369–MAX6374
Pin-Selectable Watchdog Timers
Pin Configuration
TOP VIEW
WDI 1
GND 2
N.C. 3
SET0 4
MAX6369
MAX6370
MAX6371
MAX6372
MAX6373
MAX6374
8 VCC
7 WDO
6 SET2
5 SET1
SOT23
Pin Description
PIN NAME
FUNCTION
Watchdog Input. If WDI remains either high or low for the duration of the watchdog timeout period (tWD),
1
WDI
WDO triggers a pulse. The internal watchdog timer clears whenever a WDO is asserted or whenever
WDI sees a rising or falling edge.
2
GND
Ground
3
N.C.
Not Connected. Do not make any connection to this pin.
4
SET0
Set Zero. Logic input for selecting startup delay and watchdog timeout periods. See Table 1 for timing details.
5
SET1
Set One. Logic input for selecting startup delay and watchdog timeout periods. See Table 1 for timing details.
6
SET2
Set Two. Logic input for selecting startup delay and watchdog timeout periods. See Table 1 for timing details.
Watchdog Output. Pulses low for the watchdog output pulse width, tWDO, when the internal watchdog
7
WDO
times out. The MAX6369/MAX6371/MAX6373 have open-drain outputs and require a pull-up resistor.
The MAX6370/MAX6372/MAX6374 outputs are push-pull.
8
VCC
Supply Voltage (+2.5V to +5.5V)
www.maximintegrated.com
Maxim Integrated │ 5
5 Page 
MAX6369–MAX6374
Pin-Selectable Watchdog Timers
Revision History
REVISION
NUMBER
0
1
2
3
REVISION
DATE
4/00
7/00
2/03
12/05
4 6/10
5 1/11
6 3/15
7 1/16
DESCRIPTION
Initial release
Removed future product asterisk for MAX6370.
Corrected limits in Electrical Characteristics.
Added lead-free information to Ordering Information.
Revised the Ordering Information, Absolute Maximum Ratings, Electrical
Characteristics, and the Selecting Device Timing section.
Updated the top mark information in the Ordering Information section.
Deleted minimum value for Internal Setup Time in Electrical Characteristics and
changed units from ms to µs
Added lead-free part numbers and package codes
PAGES
CHANGED
—
1
4
1
1, 2, 8
1
4
9, 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. © 2016 Maxim Integrated Products, Inc. │ 11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet MAX6372.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MAX637 | Preset/Adjustable Output CMOS Inverting Switching Regulators | Maxim Integrated |
| MAX6370 | Pin-Selectable Watchdog Timers | Maxim Integrated |
| MAX6371 | Pin-Selectable Watchdog Timers | Maxim Integrated |
| MAX6372 | Pin-Selectable Watchdog Timers | Maxim Integrated |
| 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 |