MAX6371KA+T Maxim Integrated Products, MAX6371KA+T Datasheet

IC TIMER WATCHDOG SOT23-8

MAX6371KA+T

Manufacturer Part Number
MAX6371KA+T
Description
IC TIMER WATCHDOG SOT23-8
Manufacturer
Maxim Integrated Products
Type
Watchdog Circuitr
Datasheet

Specifications of MAX6371KA+T

Number Of Voltages Monitored
1
Output
Push-Pull, Totem Pole
Reset
Active Low
Reset Timeout
Adjustable/Selectable
Voltage - Threshold
Adjustable/Selectable
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
SOT-23-8
Output Type
Active Low, Open Drain
Manual Reset
Not Resettable
Watchdog
Watchdog
Battery Backup Switching
No Backup
Supply Voltage (max)
5.5 V
Supply Voltage (min)
2.5 V
Supply Current (typ)
8 uA
Maximum Power Dissipation
700 mW
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Power Fail Detection
No
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
MAX6371KA+T
MAX6371KA+TTR
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 repeated-
ly 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 watch-
dog (WDO) output to signal that the system is not exe-
cuting 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
• Watchdog timeout period: normal operating watch-
• Watchdog output/timing options: open drain (100ms)
The MAX6369–MAX6374 operate over a +2.5V to +5.5V
supply range and are available in miniature 8-pin
SOT23 packages.
19-1676; Rev 5; 1/11
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
________________________Applications
MAX6369
MAX6370
MAX6371
MAX6372
MAX6373
MAX6374
before the watchdog timer is started.
dog timeout period after the initial startup delay.
or push-pull (1ms).
PART
Embedded Control Systems
Industrial Controllers
Critical µP and Microcontroller (µC) Monitoring
Automotive
Telecommunications
Networking
Open Drain
Push-Pull
Open Drain
Push-Pull
Open Drain
Push-Pull
OUTPUT
________________________________________________________________ Maxim Integrated Products
General Description
WDO PULSE
WIDTH (ms)
100
100
100
Pin-Selectable Watchdog Timers
1
1
1
Selectable: 1ms to 60s
Selectable: 1ms to 60s
60s
60s
S el ectab l e: 200µs to 60s or fi r st ed g e
S el ectab l e: 200µs to 60s or fi r st ed g e
MINIMUM STARTUP DELAY
o Precision Watchdog Timer for Critical
o Pin-Selectable Watchdog Timeout Periods
o Pin-Selectable Watchdog Startup Delay Periods
o Ability to Change Watchdog Timing Characteristics
o Open-Drain or Push-Pull Pulsed Active-Low
o Watchdog Timer Disable Feature
o +2.5V to +5.5V Operating Voltage
o 8µA Low Supply Current
o No External Components Required
o Miniature 8-Pin SOT23 Package
Note: All devices are available in tape-and-reel only. Required
order increment is 2,500 pieces.
/V denotes an automotive qualified part.
Devices are available in both leaded and lead-free packaging.
Specify lead-free by replacing “-T” with “+T” when ordering.
Pin Configuration appears at end of data sheet.
MAX6369KA-T
MAX6369KA/V-T
MAX6369KA/V+T
MAX6370KA-T
MAX6371KA-T
MAX6372KA-T
MAX6373KA-T
MAX6374KA-T
µP Applications
Without Power Cycling
Watchdog Output
PART
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
Ordering Information
RANGE
S el ectab l e: 1ms to 60s
S el ectab l e: 1ms to 60s
S el ectab l e: 1ms to 60s
S el ectab l e: 1ms to 60s
S el ectab l e: 30µs to 10s
S el ectab l e: 30µs to 10s
TEMP
MINIMUM WATCHDOG TIMEOUT
Selector Guide
PIN-
PACKAGE
8 SOT23
8 SOT23
8 SOT23
8 SOT23
8 SOT23
8 SOT23
8 SOT23
8 SOT23
Features
MARK
AADC
AADD
AADG
AADH
AEQV
AEQV
AADE
AADF
TOP
1

Related parts for MAX6371KA+T

MAX6371KA+T Summary of contents

Page 1

... MAX6372 Push-Pull MAX6373 Open Drain MAX6374 Push-Pull ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Pin-Selectable Watchdog Timers o Precision Watchdog Timer for Critical µP Applications o Pin-Selectable Watchdog Timeout Periods ...

Page 2

Pin-Selectable Watchdog Timers ABSOLUTE MAXIMUM RATINGS Terminal Voltage (with respect to GND) V .....................................................................-0.3V to +6V CC WDI.....................................................................-0.3V to +6V WDO (Open Drain: MAX6369/71/73) .................-0.3V to +6V WDO (Push-Pull: MAX6370/72/74 .......-0. SET0, SET1, SET2 ................................-0. Maximum ...

Page 3

ELECTRICAL CHARACTERISTICS (continued +2.5V to +5.5V, SET_ = V or GND +3V.) (Note 1) CC PARAMETER SYMBOL MAX6369/MAX6370 Startup Delay Period t DELAY Watchdog Timeout Period MAX6371/MAX6372 Startup Delay Period t DELAY Watchdog ...

Page 4

Pin-Selectable Watchdog Timers ELECTRICAL CHARACTERISTICS (continued +2.5V to +5.5V, SET_ = V or GND +3V.) (Note 1) CC PARAMETER SYMBOL Watchdog Timeout Period Watchd og Inp ...

Page 5

PIN NAME Watchdog Input. If WDI remains either high or low for the duration of the watchdog timeout period (t triggers a pulse. The internal watchdog timer clears whenever a WDO is asserted or whenever WDI sees a 1 WDI ...

Page 6

Pin-Selectable Watchdog Timers MAX6369–MAX6374 SET 2 CONTROL SET 1 LOGIC SET 0 Figure 1. Functional Diagram t V SETUP CC WDI A A WDO A TRANSITIONS ON WDI IGNORED DURING SETUP DELAY. B TRANSITION(S) ON WDI IGNORED DURING STARTUP DELAY ...

Page 7

When the startup delay expires, the watchdog begins counting its normal watchdog timeout period and waiting for WDI transitions. The startup delay ...

Page 8

Pin-Selectable Watchdog Timers START SET WDI HIGH PROGRAM CODE SUBROUTINE OR PROGRAM LOOP SET WDI LOW RETURN Figure 4. Watchdog Flow Diagram Selecting 011 (SET2 = 0, SET1 = 1, SET0 = 1) disables the watchdog timer function on all ...

Page 9

Pin-Selectable Watchdog Timers Pin Configuration TOP VIEW WDI MAX6369 GND 2 7 WDO MAX6370 MAX6371 N. SET2 MAX6372 MAX6373 SET0 4 5 SET1 MAX6374 SOT23 _______________________________________________________________________________________ TRANSISTOR COUNT: 1500 PROCESS: BiCMOS CC For the latest ...

Page 10

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2011 Maxim Integrated Products ...

Related keywords