AVAILABLE
Functional Diagrams
Pin Configurations appear at end of data sheet.
Functional Diagrams continued at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
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 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
before the watchdog timer is started.
• Watchdog timeout period: normal operating watch-
dog 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.
________________________Applications
Embedded Control Systems
Industrial Controllers
Critical µP and Microcontroller (µC) Monitoring
Automotive
Telecommunications
Networking
Features
oPrecision Watchdog Timer for Critical
µP Applications
oPin-Selectable Watchdog Timeout Periods
oPin-Selectable Watchdog Startup Delay Periods
oAbility to Change Watchdog Timing Characteristics
Without Power Cycling
oOpen-Drain or Push-Pull Pulsed Active-Low
Watchdog Output
oWatchdog Timer Disable Feature
o+2.5V to +5.5V Operating Voltage
o8µA Low Supply Current
oNo External Components Required
oMiniature 8-Pin SOT23 Package
Pin-Selectable Watchdog Timers
19-1676; Rev 5; 1/11
PART OUTPUT WDO PULSE
WIDTH (ms) MINIMUM STARTUP DELAY MINIMUM WATCHDOG TIMEOUT
MAX6369 Open Drain 100 Selectable: 1ms to 60s S el ectab l e: 1ms to 60s
MAX6370 Push-Pull 1 Selectable: 1ms to 60s S el ectab l e: 1ms to 60s
MAX6371 Open Drain 100 60s S el ectab l e: 1ms to 60s
MAX6372 Push-Pull 1 60s S el ectab l e: 1ms to 60s
MAX6373 Open Drain 100 S el ectab l e: 200µs to 60s or fi r st ed g eS el ectab l e: 30µs to 10s
MAX6374 Push-Pull 1 S el ectab l e: 200µs to 60s or fi r st ed g eS el ectab l e: 30µs to 10s
Selector Guide
PART TEMP
RANGE
PIN-
PACKAGE
TOP
MARK
MAX6369KA-T
-40°C to +125°C
8 SOT23
AADC
MAX6369KA/V-T
-40°C to +125°C
8 SOT23
AEQV
MAX6369KA/V+T
-40°C to +125°C
8 SOT23
AEQV
MAX6370KA-T
-40°C to +125°C
8 SOT23
AADD
MAX6371KA-T
-40°C to +125°C
8 SOT23
AADE
MAX6372KA-T
-40°C to +125°C
8 SOT23
AADF
MAX6373KA-T
-40°C to +125°C
8 SOT23
AADG
MAX6374KA-T
-40°C to +125°C
8 SOT23
AADH
Ordering Information
Pin Configuration appears at end of data sheet.
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.
MAX6369–MAX6374
Pin-Selectable Watchdog Timers
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VCC = +2.5V to +5.5V, SET_ = VCC or GND, TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA= +25°C and
VCC = +3V.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Terminal Voltage (with respect to GND)
VCC .....................................................................-0.3V to +6V
WDI.....................................................................-0.3V to +6V
WDO (Open Drain: MAX6369/71/73) .................-0.3V to +6V
WDO (Push-Pull: MAX6370/72/74 .......-0.3V to (VCC + 0.3V)
SET0, SET1, SET2 ................................-0.3V to (VCC + 0.3V)
Maximum Current, Any Pin (input/output)...........................20mA
Continuous Power Dissipation (TA= +70°C)
8-Pin SOT23 (derate 8.75mW/°C above +70°C).........700mW
Operating Temperature Range .........................-40°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature......................................................+150°C
VCC Rise or Fall Rate......................................................0.05V/µs
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow)
Lead(Pb)-free...................................................................+260°C
Containing Lead (Pb).......................................................+240°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Operating Voltage Range VCC 2.5 5.5 V
TA = -40°C to +85°C820
Supply Current ICC No load TA = -40°C to +125°C1022
µA
Input High Voltage VIH WDI, SET0, SET1, SET2 0.8 × VCC V
VCC ≥ 3.3V,
TA = -40°C to +85°C0.8
VCC ≥ 3.3V,
TA = -40°C to +125°C0.6
VCC ≥ 2.5V,
TA = -40°C to +85°C0.6
Input Low Voltage VIL WDI, SET0,
SET1, SET2
VCC ≥ 2.5V,
TA = -40°C to +125°C0.4
V
Logic Input Current (Note 2) VWDI or VSET_ = 0V or VCC 0 ±10 nA
ISINK = 1.2mA, VCC > 2.7V, watchdog
output asserted 0.3 V
WDO Output Low
Voltage VOL ISINK = 6mA, VCC > 4.5V, watchdog
output asserted 0.4 V
WDO Leakage Current ILKG VWDO = 0 to +5.5V, output deasserted,
MAX6369/MAX6371/MAX6373 1µA
ISOURCE = 500µA, VCC > 2.7V, watchdog
output deasserted 0.8 × VCC
WDO Output High
Voltage VOH ISOURCE = 800µA, VCC > 4.5V, watchdog
output deasserted VCC - 1.5
V
2
Maxim Integrated
MAX6369–MAX6374
Pin-Selectable Watchdog Timers
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +2.5V to +5.5V, SET_ = VCC or GND, TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA= +25°C and
VCC = +3V.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX6369/MAX6370
VSET2 = 0V, VSET1 = 0V, VSET0 = 0V 1 3
VSET2 = 0V, VSET1 = 0,V SET0 = VCC 10 30
VSET2 = 0V, SET1 = VCC, VSET0 = 0V 30 90
ms
VSET2 = 0V, SET1 = VCC, SET0 = VCC Watchdog Disabled
SET2 = VCC, VSET1 = 0V, VSET0 = 0V 100 300 ms
SET2 = VCC, VSET1 = 0V, SET0 = VCC 13
SET2 = VCC, SET1 = VCC, VSET0 = 0V 10 30
Startup Delay Period tDELAY
SET2 = VCC, SET1 = VCC, SET0 = VCC 60 180
s
VSET2 = 0V, VSET1 = 0V, VSET0 = 0V 1 3
VSET2 = 0V, VSET1 = 0V, SET0 = VCC 10 30
VSET2 = 0V, SET1 = VCC, VSET0 = 0V 30 90
ms
VSET2 = 0V, SET1 = VCC, SET0 = VCC Watchdog Disabled
SET2 = VCC, VSET1 = 0V, VSET0 = 0V 100 300 ms
SET2 = VCC, VSET1 = 0V, SET0 = VCC 13
SET2 = VCC, SET1 = VCC, VSET0 = 0V 10 30
Watchdog Timeout
Period tWD
SET2 = VCC, SET1 = VCC, SET0 = VCC 60 180
s
MAX6371/MAX6372
VSET2 = 0V, SET1 = VCC, SET0 = VCC Watchdog Disabled
Startup Delay Period tDELAY All other SET_ conditions 60 180 s
VSET2 = 0V, VSET1 = 0V, VSET0 = 0V 1 3
VSET2 = 0V, VSET1 = 0V, SET0 = VCC 39
VSET2 = 0V, SET1 = VCC, VSET0 = 0V 10 30
ms
VSET2 = 0V, SET1 = VCC, SET0 = VCC Watchdog Disabled
SET2 = VCC, VSET1 = 0V, VSET0 = 0V 100 300
SET2 = VCC, VSET1 = 0V, SET0 = VCC 300 900 ms
SET2 = VCC, SET1 = VCC, VSET0 = 0V 3 9
Watchdog Time-Out
Period tWD
SET2 = VCC, SET1 = VCC, SET0 = VCC 60 180 s
MAX6373/MAX6374
VSET2 = 0V, VSET1 = 0V, VSET0 = 0V 3 9 ms
VSET2 = 0V, VSET1 = 0V, SET0 = VCC 39
VSET2 = 0V, SET1 = VCC, VSET0 = 0V 60 180 s
SET2 = 0V, SET1 = VCC, SET0 = VCC Watchdog Disabled
SET2 = VCC, VSET1 = 0V, VSET0 = 0V 200 600 µs
SET2 = VCC, VSET1 = 0V, SET0 = VCC First Edge (Note 3)
SET2 = VCC, SET1 = VCC, VSET0 = 0V First Edge (Note 3)
Startup Delay Period tDELAY
SET2 = VCC, SET1 = VCC, SET0 = VCC 60 180 s
Maxim Integrated
3
MAX6369–MAX6374
Pin-Selectable Watchdog Timers
4
6
10
8
12
14
-40 10-15 35 60 85
SUPPLY CURRENT
vs. TEMPERATURE
MAX6369/74-01
TEMPERATURE (°C)
SUPPLY CURRENT (μA)
VCC = +5.5V
VCC = +2.5V
Typical Operating Characteristics
(Circuit of Figure 1, TA= +25°C, unless otherwise noted.)
0.997
0.999
0.998
1.001
1.000
1.002
1.003
-40 10-15 35 60 85
WATCHDOG TIMEOUT PERIOD
vs. TEMPERATURE
MAX6369/74-02
TEMPERATURE (°C)
NORMALIZED WATCHDOG TIMEOUT PERIOD
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +2.5V to +5.5V, SET_ = VCC or GND, TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA= +25°C and
VCC = +3V.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
VSET2 = 0V, VSET1 = 0V, VSET0 = 0V 3 9 ms
VSET2 = 0V, VSET1 = 0V, SET0 = VCC 39
VSET2 = 0V, SET1 = VCC, VSET0 = 0V 1 3 s
VSET2 = 0V, SET1 = VCC, SET0 = VCC Watchdog Disabled
SET2 = VCC, VSET1 = 0V, VSET0 = 0V 30 90 µs
SET2 = VCC, VSET1 = 0V, SET0 = VCC 13
SET2 = VCC, SET1 = VCC, VSET0 = 0V 10 30
Watchdog Timeout
Period tWD
SET2 = VCC, SET1 = VCC, SET0 = VCC 10 30
s
Watchd og Inp ut P ul se Wi d th
( N ote 2) tWDI After WDO deasserted 100 ns
MAX6369/MAX6371/MAX6373 100 300 ms
Watchdog Output Pulse Width tWDO MAX6370/MAX6372/MAX6374 1 3 ms
Internal Setup Time
(Note 4) tSETUP After WDO deasserted 100 300 ms
Note 1: Production tested at TA= +25°C. Guaranteed by design over temperature limits.
Note 2: Guaranteed by design.
Note 3: In this setting the watchdog timer is inactive and startup delay ends when WDI sees its first level transition. See the
Selecting
Device Timing
section for more information.
Note 4: After power-up, or a setting change, there is an internal setup time during which WDI is ignored.
4
Maxim Integrated
MAX6369–MAX6374
Pin-Selectable Watchdog Timers
PIN NAME FUNCTION
1 WDI
Watchdog Input. If WDI remains either high or low for the duration of the watchdog timeout period (tWD), 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 S et Z er o. Log i c i np ut for sel ecti ng star tup d el ay and w atchd og ti m eout p er i od s. S ee Tab l e 1 for ti m i ng d etai l s.
5 SET1 S et One. Log i c i np ut for sel ecti ng star tup d el ay and w atchd og ti m eout p er i od s. S ee Tab l e 1 for ti m i ng d etai l s.
6 SET2 S et Tw o. Log i c i np ut for sel ecti ng star tup d el ay and w atchd og ti m eout p er i od s. S ee Tab l e 1 for ti m i ng d etai l s.
7WDO
Watchdog Output. Pulses low for the watchdog output pulse width, tWDO, when the internal watchdog times
out. The MAX6369/MAX6371/MAX6373 have open-drain outputs and require a pull-up resistor. The
MAX6370/MAX6372/MAX6374 outputs are push-pull.
8V
CC Supply Voltage (+2.5V to +5.5V)
Table 1. Minimum Timeout Settings
Pin Description
Detailed Description
The MAX6369–MAX6374 are flexible watchdog circuits
for monitoring µP activity. During normal operation, the
internal timer is cleared each time the µP toggles the
WDI with a valid logic transition (low to high or high to
low) within the selected timeout period (tWD). The WDO
remains high as long as the input is strobed within the
selected timeout period. If the input is not strobed
before the timeout period expires, the watchdog output
is asserted low for the watchdog output pulse width
(tWDO). The device type and the state of the three logic
control pins (SET0, SET1, and SET2) determine watch-
dog timing characteristics. The three basic timing varia-
tions for the watchdog startup delay and the normal
watchdog timeout period are summarized below (see
Table 1 for the timeout characteristics for all devices in
the family):
• Watchdog Startup Delay:
Provides an initial delay before the watchdog timer is
started.
Allows time for the µP system to power up and initial-
ize before assuming responsibility for normal watch-
dog timer updates.
Includes several fixed or pin-selectable startup delay
options from 200µs to 60s, and an option to wait for
the first watchdog input transition before starting the
watchdog timer.
LOGIC INPUTS MAX6369/MAX6370 MAX6371/MAX6372 MAX6373/MAX6374
SET2 SET1 SET0 tDELAY, tWD tDELAY = 60s, tWD tDELAY tWD
0 0 0 1ms 1ms 3ms 3ms
0 0 1 10ms 3ms 3s 3s
0 1 0 30ms 10ms 60s 1s
0 1 1 Disabled Disabled Disabled Disabled
1 0 0 100ms 100ms 200μs30μs
1 0 1 1s 300ms First Edge 1s
1 1 0 10s 3s First Edge 10s
1 1 1 60s 60s 60s 10s
Maxim Integrated
5
MAX6369–MAX6374
Pin-Selectable Watchdog Timers
• Watchdog Timeout Period:
Normal operating watchdog timeout period after the
initial startup delay.
A watchdog output pulse is asserted if a valid watch-
dog input transition is not received before the timeout
period elapses.
Eight pin-selectable timeout period options for each
device, from 30µs to 60s.
Pin-selectable watchdog timer disable feature.
• Watchdog Output/Timing Options:
Open drain, active low with 100ms minimum watch-
dog output pulse (MAX6369/MAX6371/MAX6373).
Push-pull, active low with 1ms minimum watchdog
output pulse (MAX6370/MAX6372/MAX6374).
Each device has a watchdog startup delay that is initi-
ated when the supervisor is first powered or after the
user modifies any of the logic control set inputs. The
watchdog timer does not begin to count down until the
VCC
WDI
WDO
tSETUP tDELAY tWD
tWD
tWD
tWDO
A
B
C
D
E
F
G
TRANSITIONS ON WDI IGNORED DURING SETUP DELAY.
TRANSITION(S) ON WDI IGNORED DURING STARTUP DELAY PERIOD.
WATCHDOG TIMER STARTS AFTER STARTUP DELAY AND WDO IS DEASSERTED.
TRANSITION OCCURS BEFORE WATCHDOG TIMEOUT PERIOD. WATCHDOG
TIMER CLEARS AND STARTS TIMER AGAIN.
WATCHDOG TIMES OUT, WDO ASSERTS.
TRANSITIONS ON WDI IGNORED WHEN WDO ASSERTED.
WATCHDOG TIMER STARTS AFTER WDO DEASSERTS.
AABCD EF G E
Figure 2. Watchdog Timing
WATCHDOG
TIMER CIRCUITRY
TRANSITION
DETECTOR
ENABLE
SET WATCHDOG TIMEOUT
SET STARTUP DELAY
MAX6369–MAX6374
EN
CONTROL
LOGIC
SET 2
SET 1
SET 0
VCC
GND
CLEAR
WDO
OUT
WDI
OUTPUT
Figure 1. Functional Diagram
6
Maxim Integrated
MAX6369–MAX6374
completion of the startup delay period, and no watch-
dog output pulses are asserted during the startup
delay. When the startup delay expires, the watchdog
begins counting its normal watchdog timeout period
and waiting for WDI transitions. The startup delay
allows time for the µP system to power up and fully ini-
tialize before assuming responsibility for the normal
watchdog timer updates. Startup delay periods vary
between the different devices and may be altered by
the logic control set pins. To ensure that the system
generates no undesired watchdog outputs, the routine
watchdog input transitions should begin before the
selected minimum startup delay period has expired.
The normal watchdog timeout period countdown is initi-
ated when the startup delay is complete. If a valid logic
transition is not recognized at WDI before the watchdog
timeout period has expired, the supervisor asserts a
watchdog output. Watchdog timeout periods vary
between the different devices and may be altered by
the logic control set pins. To ensure that the system
generates no undesired watchdog outputs, the watch-
dog input transitions should occur before the selected
minimum watchdog timeout period has expired.
The startup delay and the watchdog timeout period are
determined by the states of the SET0, SET1, and SET2
pins, and by the particular device within the family. For
the MAX6369 and MAX6370, the startup delay is equal
to the watchdog timeout period. The startup and
watchdog timeout periods are pin selectable from 1ms
to 60s (minimum).
For the MAX6371 and MAX6372, the startup delay is
fixed at 60s and the watchdog timeout period is pin
selectable from 1ms to 60s (minimum).
The MAX6373/MAX6374 provide two timing variations
for the startup delay and normal watchdog timeout.
Five of the pin-selectable modes provide startup delays
from 200µs to 60s minimum, and watchdog timeout
delays from 3ms to 10s minimum. Two of the selectable
modes do not initiate the watchdog timer until the
device receives its first valid watchdog input transition
(there is no fixed period by which the first input must be
received). These two extended startup delay modes
are useful for applications requiring more than 60s for
system initialization.
All the MAX6369–MAX6374 devices may be disabled
with the proper logic control pin setting (Table 1).
Applications Information
Input Signal Considerations
Watchdog timing is measured from the last WDI rising
or falling edge associated with a pulse of at least 100ns
in width. WDI transitions are ignored when WDO is
asserted, and during the startup delay period (Figure
2). Watchdog input transitions are also ignored for a
setup period, tSETUP, of up to 300µs after power-up or
a setting change (Figure 3).
Selecting Device Timing
SET2, SET1, and SET0 program the startup delay and
watchdog timeout periods (Table 1). Timeout settings
can be hard wired, or they can be controlled with logic
gates and modified during operation. To ensure smooth
transitions, the system should strobe WDI immediately
before the timing settings are changed. This minimizes
the risk of initializing a setting change too late in the
timer countdown period and generating undesired
watchdog outputs. After changing the timing settings,
two outcomes are possible based on WDO. If the
change is made while WDO is asserted, the previous
setting is allowed to finish, the characteristics of the
new setting are assumed, and the new startup phase is
entered after a 300µs setup time (tSETUP) elapses. If
the change is made while WDO is not asserted, the
new setting is initiated immediately, and the new start-
up phase is entered after the 300µs setup time elapses.
Pin-Selectable Watchdog Timers
tWD
tWD
tWD
tSETUP tDELAY tWD tSETUP tDELAY tWD
** * * *
*IGNORED EDGE
WDI
WDO
SET_
Figure 3. Setting Change Timing
Maxim Integrated
7
MAX6369–MAX6374
Pin-Selectable Watchdog Timers
Selecting 011 (SET2 = 0, SET1 = 1, SET0 = 1) disables
the watchdog timer function on all devices in the family.
Operation can be reenabled without powering down by
changing the set inputs to the new desired setting. The
device assumes the new selected timing characteris-
tics and enter the startup phase after the 300µs setup
time elapses (Figure 3). WDO is high when the watch-
dog timer is disabled.
The MAX6373/MAX6374 offer a first-edge feature. In
first-edge mode (settings 101 or 110, Table 1), the
internal timer does not control the startup delay period.
Instead, startup terminates when WDI sees a transition.
If changing to first-edge mode while the device is oper-
ating, disable mode must be entered first. It is then safe
to select first-edge mode. Entering disable mode first
ensures the output is unasserted when selecting first-
edge mode and removes the danger of WDI being
masked out.
Output
The MAX6369/MAX6371/MAX6373 have an active-low,
open-drain output that provides a watchdog output
pulse of 100ms. This output structure sinks current
when WDO is asserted. Connect a pullup resistor from
WDO to any supply voltage up to +5.5V.
Select a resistor value large enough to register a logic
low (see
Electrical Characteristics
), and small enough
to register a logic high while supplying all input current
and leakage paths connected to the WDO line. A 10kΩ
pullup is sufficient in most applications. The MAX6370/
MAX6372/MAX6374 have push-pull outputs that pro-
vide an active-low watchdog output pulse of 1ms.
When WDO deasserts, timing begins again at the
beginning of the watchdog timeout period (Figure 2).
Usage in Noisy Environments
If using the watchdog timer in an electrically noisy envi-
ronment, a bypass capacitor of 0.1µF should be con-
nected between VCC and GND as close to the device
as possible, and no further away than 0.2 inches.
________________Watchdog Software
Considerations
To help the watchdog timer monitor software execution
more closely, set and reset the watchdog input at differ-
ent points in the program, rather than pulsing the watch-
dog input high-low-high or low-high-low. This technique
avoids a stuck loop, in which the watchdog timer would
continue to be reset inside the loop, keeping the watch-
dog from timing out. Figure 4 shows an example of a
flow diagram where the I/O driving the watchdog input is
set high at the beginning of the program, set low at the
end of every subroutine or loop, then set high again
when the program returns to the beginning. If the pro-
gram should hang in any subroutine, the problem would
be quickly corrected, since the I/O is continually set low
and the watchdog timer is allowed to time out, causing
WDO to pulse.
START
SET WDI
HIGH
PROGRAM
CODE
SUBROUTINE OR
PROGRAM LOOP
SET WDI LOW
RETURN
POSSIBLE
INFINITE LOOP PATH
Figure 4. Watchdog Flow Diagram
8
Maxim Integrated
MAX6369–MAX6374
Pin-Selectable Watchdog Timers
Chip Information
TRANSISTOR COUNT: 1500
PROCESS: BiCMOS
SET2
SET1SET0
1
2
8
7
VCC
WDOGND
N.C.
WDI
SOT23
TOP VIEW
3
4
6
5
MAX6369
MAX6370
MAX6371
MAX6372
MAX6373
MAX6374
Pin Configuration
Package Information
For the latest package outline information and land patterns, go
to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in
the package code indicates RoHS status only. Package draw-
ings may show a different suffix character, but the drawing per-
tains to the package regardless of RoHS status.
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
8 SOT23 K8SN-1 21-0078 90-0176
Maxim Integrated
9
MAX6369–MAX6374
Revision History
REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
0 4/00 Initial release —
1 7/00 Removed future product asterisk for MAX6370. 1
2 2/03 Corrected limits in Electrical Characteristics.4
3 12/05 Added lead-free information to Ordering Information.1
4 6/10 Revised the Ordering Information, Absolute Maximum Ratings, Electrical
Characteristics, and the Selecting Device Timing section. 1, 2, 8
5 1/11 Updated the top mark information in the Ordering Information section. 1
MAX6369–MAX6374
Pin-Selectable Watchdog Timers
10 Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000
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. 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.
© 2011 Maxim Integrated The Maxim logo and Maxim Integrated are trademarks of Maxim Integrated Products, Inc.
