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Maxim > Solutions > Automotive

Watchdog Timers

DATA SHEETS
Display Title / Parts Key Advantages
QV  PDF Single-/Dual-/Triple-Voltage µP Supervisory Circuits with Independent Watchdog Output
MAX6730A, MAX6731A, MAX6732A, MAX6733A, MAX6734A, MAX6735A

Single-/Dual-/Triple-Voltage µP Supervisory Circuits with Independent Watchdog Output Monitor Down to 0.63V
QV  PDF Single-/Dual-/Triple-Voltage µP Supervisory Circuits with Independent Watchdog Output
MAX6730, MAX6731, MAX6732, MAX6733, MAX6734, MAX6735

Single-/Dual-/Triple-Voltage µP Supervisory Circuits with Independent Watchdog Output Monitor Down to 0.63V
QV  PDF µP Reset Circuits with Capacitor-Adjustable Reset/Watchdog Timeout Delay
MAX6746, MAX6747, MAX6748, MAX6749, MAX6750, MAX6751, MAX6752, MAX6753
QV  PDF µP Supervisory Circuits with Windowed (Min/Max) Watchdog and Manual Reset
MAX6323, MAX6324

Industry's-First µP Supervisory with Windowed Watchdog and Manual Reset
QV  PDF Pin-Selectable Watchdog Timers
MAX6369, MAX6370, MAX6371, MAX6372, MAX6373, MAX6374
QV  PDF 5-Pin µP Supervisory Circuits with Watchdog and Manual Reset
MAX6316, MAX6316M, MAX6317, MAX6318, MAX6319, MAX6320, MAX6321, MAX6322

Versatile, Customizable SOT Reset + Watchdog ICs Offer 3,224 Unique Options
QV  PDF 5-Pin Microprocessor Supervisory Circuits with Watchdog Timer and Manual Reset
MAX823, MAX823L, MAX823M, MAX823R, MAX823S, MAX823T, MAX823Y, MAX823Z, MAX824, MAX824L, MAX824M, MAX824R, MAX824S, MAX824T, MAX824Y, MAX824Z, MAX825, MAX825L, MAX825M, MAX825R, MAX825S, MAX825T, MAX825Y, MAX825Z

Industry's-First SOT Reset ICs with Watchdog and Manual Reset



Key Specifications:   Supervisors (1 Monitored Voltage)
Part Number Reset Threshold Range (V) Active-Low Reset Output Active-High Reset Output Min. Reset Timeout Range Watchdog Feature Nom. Watchdog Timeout Range Supervisor Features Reset Thresh. Acc. (% @+25°C) Max. ICC (µA) Industry Qualified Package Smallest Available Package (max w/pins) (mm2) Operating Temp. Range (°C)
MAX6730  1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5 		Open Drain  -  15ms to 85ms
1ms to 15ms
85ms to 300ms
>1s 		Input (WDI)
Input/Output (WDI/WDO)
Extended Setup Period 		1s to 2s
>2s 		Manual Reset 2.5 37  -  SOT-23/6 9 -40 to +85
0 to +70
MAX6731  1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5 		Push-Pull  -  15ms to 85ms
1ms to 15ms
85ms to 300ms
>1s 		Input (WDI)
Input/Output (WDI/WDO)
Extended Setup Period 		1s to 2s
>2s 		Manual Reset 2.5 37  -  SOT-23/6 9 -40 to +85
0 to +70
MAX6746  1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5 		Push-Pull  -  15ms to 85ms
1ms to 15ms
300ms to 1s
85ms to 300ms
<1ms
>1s
Adjustable 		Input (WDI)
Cap Adjustable 		1s to 2s
<1s
>2s
Adjustable 		Manual Reset 2 10 Automotive - General SOT-23/8 9 -40 to +125
-40 to +85
0 to +70
MAX6747  1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5 		Open Drain  -  15ms to 85ms
1ms to 15ms
300ms to 1s
85ms to 300ms
<1ms
>1s
Adjustable 		Input (WDI)
Cap Adjustable 		1s to 2s
<1s
>2s
Adjustable 		Manual Reset 2 10 Automotive - General SOT-23/8 9 -40 to +125
-40 to +85
0 to +70
MAX6748  1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5 		Push-Pull  -  15ms to 85ms
1ms to 15ms
300ms to 1s
85ms to 300ms
<1ms
>1s
Adjustable 		Input (WDI)
Cap Adjustable 		1s to 2s
<1s
>2s
Adjustable 		Adjustable Reset Input 2 10 Automotive - General SOT-23/8 9 -40 to +125
-40 to +85
0 to +70
MAX6749  1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5 		Open Drain  -  15ms to 85ms
1ms to 15ms
300ms to 1s
85ms to 300ms
<1ms
>1s
Adjustable 		Input (WDI)
Cap Adjustable 		1s to 2s
<1s
>2s
Adjustable 		Adjustable Reset Input 2 10 Automotive - General SOT-23/8 9 -40 to +125
-40 to +85
0 to +70
MAX6752  1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5 		Push-Pull  -  15ms to 85ms
1ms to 15ms
300ms to 1s
85ms to 300ms
<1ms
>1s
Adjustable 		Input (WDI)
Cap Adjustable
Windowed 		1s to 2s
<1s
>2s
Adjustable 		 -  2 10 Automotive - General SOT-23/8 9 -40 to +125
-40 to +85
0 to +70
MAX6753  1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5 		Open Drain  -  15ms to 85ms
1ms to 15ms
300ms to 1s
85ms to 300ms
<1ms
>1s
Adjustable 		Input (WDI)
Cap Adjustable
Windowed 		1s to 2s
<1s
>2s
Adjustable 		 -  2 10 Automotive - General SOT-23/8 9 -40 to +125
-40 to +85
0 to +70
MAX823  1.8 to 2.5
2.5 to 3.3
3.3 to 5.5 		Push-Pull  -  85ms to 300ms Input (WDI) 1s to 2s Manual Reset  -  24 Automotive - General SC-70/5
SOT-23/5 		5 -40 to +125
-40 to +85
0 to +70
MAX824  1.8 to 2.5
2.5 to 3.3
3.3 to 5.5 		Push-Pull Push-Pull 85ms to 300ms Input (WDI) 1s to 2s  -   -  24 Automotive - General SC-70/5
SOT-23/5 		5 -40 to +125
-40 to +85
0 to +70
MAX825  1.8 to 2.5
2.5 to 3.3
3.3 to 5.5 		Push-Pull Push-Pull 85ms to 300ms No Watchdog  -  Manual Reset  -  12 Automotive - General SC-70/5
SOT-23/5 		5 -40 to +125
-40 to +85
0 to +70
MAX6323  2.5 to 3.3
3.3 to 5.5 		Push-Pull  -  85ms to 300ms Input/Output (WDI/WDO)
Windowed 		1s to 2s
<1s
>2s
Adjustable 		Manual Reset 1.5 45 Automotive - General SOT-23/6 9 -40 to +125
-40 to +85
0 to +70
MAX6324  2.5 to 3.3
3.3 to 5.5 		Open Drain  -  85ms to 300ms Input/Output (WDI/WDO)
Windowed 		1s to 2s
<1s
>2s
Adjustable 		Manual Reset 1.5 45 Automotive - General SOT-23/6 9 -40 to +125
-40 to +85
0 to +70
MAX6316M  2.5 to 3.3
3.3 to 5.5 		Bidirectional  -  15ms to 85ms
1ms to 15ms
85ms to 300ms
>1s 		Input (WDI) 1s to 2s
<1s
>2s 		Manual Reset 1.5 12 Automotive - AECQ100
Automotive - General 		SOT-23/5 9 -40 to +85
0 to +70
See All Supervisors (1 Monitored Voltage) (268)

Key Specifications:   Supervisors (2 Monitored Voltages)
Part Number Interface Reset Threshold Range (V) Active-Low Reset Output Min. Reset Timeout Range Watchdog Feature Nom. Watchdog Timeout Range Supervisor Features Reset Thresh. Acc. (% @+25°C) Max. ICC (µA) Industry Qualified Package Smallest Available Package (max w/pins) (mm2) Operating Temp. Range (°C)
MAX6732  Factory Fixed 0 to 1.2
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5 		Open Drain 15ms to 85ms
1ms to 15ms
85ms to 300ms
>1s 		Input (WDI)
Input/Output (WDI/WDO)
Extended Setup Period 		1s to 2s
>2s 		 -  2.5 37  -  SOT-23/6 9 -40 to +85
0 to +70
MAX6733  Factory Fixed 0 to 1.2
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5 		Push-Pull 15ms to 85ms
1ms to 15ms
85ms to 300ms
>1s 		Input (WDI)
Input/Output (WDI/WDO)
Extended Setup Period 		1s to 2s
>2s 		 -  2.5 37  -  SOT-23/6 9 -40 to +85
0 to +70
MAX6750  Factory Fixed
R/C Adjustable 		1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5 		Push-Pull 15ms to 85ms
1ms to 15ms
300ms to 1s
85ms to 300ms
<1ms
>1s
Adjustable 		Input (WDI)
Cap Adjustable 		1s to 2s
<1s
>2s
Adjustable 		Adjustable Reset Input 2 10 Automotive - General SOT-23/8 9 -40 to +125
-40 to +85
0 to +70
MAX6751  Factory Fixed
R/C Adjustable 		1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5 		Open Drain 15ms to 85ms
1ms to 15ms
300ms to 1s
85ms to 300ms
<1ms
>1s
Adjustable 		Input (WDI)
Cap Adjustable 		1s to 2s
<1s
>2s
Adjustable 		Adjustable Reset Input 2 10 Automotive - General SOT-23/8 9 -40 to +125
-40 to +85
0 to +70
See All Supervisors (2 Monitored Voltages) (70)

Key Specifications:   Supervisors (3 Monitored Voltages)
Part Number Interface Reset Threshold Range (V) Active-Low Reset Output Min. Reset Timeout Range Watchdog Feature Nom. Watchdog Timeout Range Supervisor Features Reset Thresh. Acc. (% @+25°C) Max. ICC (µA) Package Smallest Available Package (max w/pins) (mm2) Operating Temp. Range (°C)
MAX6734  Factory Fixed
R/C Adjustable 		0 to 1.2
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5 		Open Drain 15ms to 85ms
1ms to 15ms
85ms to 300ms
>1s 		Input (WDI)
Input/Output (WDI/WDO)
Extended Setup Period 		1s to 2s
>2s 		Adjustable Reset Input
Manual Reset 		2.5 37 SOT-23/8 9 -40 to +85
0 to +70
MAX6735  Factory Fixed
R/C Adjustable 		0 to 1.2
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5 		Push-Pull 15ms to 85ms
1ms to 15ms
85ms to 300ms
>1s 		Input (WDI)
Input/Output (WDI/WDO)
Extended Setup Period 		1s to 2s
>2s 		Adjustable Reset Input
Manual Reset 		2.5 37 SOT-23/8 9 -40 to +85
0 to +70
See All Supervisors (3 Monitored Voltages) (21)

Key Specifications:   Watchdog Timers
Part Number Watchdog Feature Nom. Watchdog Timeout Range Min. Watchdog Startup Delay Watchdog Output Max. ICC (µA) Industry Qualified Package Smallest Available Package (max w/pins) (mm2) Operating Temp. Range (°C)
MAX6369  Input (WDI)
Input/Output (WDI/WDO)
Pin Selectable
Watchdog Only 		1s to 2s
<1s
>2s
Adjustable 		<60s Open-Drain 20 Automotive - General SOT-23/8 9 -40 to +85
0 to +70
MAX6370  Input (WDI)
Input/Output (WDI/WDO)
Pin Selectable
Watchdog Only 		1s to 2s
<1s
>2s
Adjustable 		<60s Push-Pull 20 Automotive - General SOT-23/8 9 -40 to +85
0 to +70
MAX6371  Input (WDI)
Input/Output (WDI/WDO)
Pin Selectable
Watchdog Only 		1s to 2s
<1s
>2s
Adjustable 		60s Open-Drain 20 Automotive - General SOT-23/8 9 -40 to +85
0 to +70
MAX6372  Input (WDI)
Input/Output (WDI/WDO)
Pin Selectable
Watchdog Only 		1s to 2s
<1s
>2s
Adjustable 		60s Push-Pull 20 Automotive - General SOT-23/8 9 -40 to +85
0 to +70
MAX6373  Input (WDI)
Input/Output (WDI/WDO)
Pin Selectable
Watchdog Only 		1s to 2s
<1s
>2s
Adjustable 		>60s Open-Drain 20 Automotive - General SOT-23/8 9 -40 to +85
0 to +70
MAX6374  Input (WDI)
Input/Output (WDI/WDO)
Pin Selectable
Watchdog Only 		1s to 2s
<1s
>2s
Adjustable 		>60s Push-Pull 20 Automotive - General SOT-23/8 9 -40 to +85
0 to +70
See All Watchdog Timers (7)


         


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