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Maxim > Solutions > Automotive

Watchdog Timers

DATA SHEETS
Display Title/Parts Key Advantages
QV  PDF 125nA Supervisory Circuits with Capacitor-Adjustable Reset and Watchdog Timeouts
MAX16056, MAX16057, MAX16058, MAX16059

Capacitor-Adjustable Nanopower Supervisory Circuits
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 Thresh.
(V)
Reset Out Reset Out tRESET Watchdog Feature Watchdog Timeout Supervisor Features Reset Thresh. Accur.
(%)
ICC
(µA)
Active Low Active High min @ +25°C max
MAX16056 NEW!
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Push-Pull - Adjustable
Cap Adjustable
Input (WDI)
Adjustable Manual Reset - 0.125
MAX16057 NEW!
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Push-Pull - Adjustable No Watchdog - Manual Reset - 0.125
MAX16058 NEW!
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Open Drain - Adjustable
Cap Adjustable
Input (WDI)
Adjustable Manual Reset - 0.125
MAX16059 NEW!
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Open Drain - Adjustable No Watchdog - Manual Reset - 0.125
MAX6730A 
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Open Drain -
1ms to 15ms
15ms to 85ms
85ms to 300ms
>1s
Extended Setup Period
Input (WDI)
Input/Output (WDI/WDO)
1s to 2s
>2s
Manual Reset 2.5 39
MAX6731A 
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Push-Pull -
1ms to 15ms
15ms to 85ms
85ms to 300ms
>1s
Extended Setup Period
Input (WDI)
Input/Output (WDI/WDO)
1s to 2s
>2s
Manual Reset 2.5 39
MAX6730 
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Open Drain -
1ms to 15ms
15ms to 85ms
85ms to 300ms
>1s
Extended Setup Period
Input (WDI)
Input/Output (WDI/WDO)
1s to 2s
>2s
Manual Reset 2.5 37
MAX6731 
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Push-Pull -
1ms to 15ms
15ms to 85ms
85ms to 300ms
>1s
Extended Setup Period
Input (WDI)
Input/Output (WDI/WDO)
1s to 2s
>2s
Manual Reset 2.5 37
MAX6746 
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Push-Pull -
1ms to 15ms
15ms to 85ms
85ms to 300ms
300ms to 1s
<1ms
>1s
Adjustable
Cap Adjustable
Input (WDI)
1s to 2s
<1s
>2s
Adjustable
Manual Reset 2 10
MAX6747 
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Open Drain -
1ms to 15ms
15ms to 85ms
85ms to 300ms
300ms to 1s
<1ms
>1s
Adjustable
Cap Adjustable
Input (WDI)
1s to 2s
<1s
>2s
Adjustable
Manual Reset 2 10
MAX6748 
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Push-Pull -
1ms to 15ms
15ms to 85ms
85ms to 300ms
300ms to 1s
<1ms
>1s
Adjustable
Cap Adjustable
Input (WDI)
1s to 2s
<1s
>2s
Adjustable
Adjustable Reset Input 2 10
MAX6749 
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Open Drain -
1ms to 15ms
15ms to 85ms
85ms to 300ms
300ms to 1s
<1ms
>1s
Adjustable
Cap Adjustable
Input (WDI)
1s to 2s
<1s
>2s
Adjustable
Adjustable Reset Input 2 10
MAX6752 
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Push-Pull -
1ms to 15ms
15ms to 85ms
85ms to 300ms
300ms to 1s
<1ms
>1s
Adjustable
Cap Adjustable
Input (WDI)
Windowed
1s to 2s
<1s
>2s
Adjustable
- 2 10
MAX6753 
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Open Drain -
1ms to 15ms
15ms to 85ms
85ms to 300ms
300ms to 1s
<1ms
>1s
Adjustable
Cap Adjustable
Input (WDI)
Windowed
1s to 2s
<1s
>2s
Adjustable
- 2 10
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
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
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
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
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
MAX6316M 
2.5 to 3.3
3.3 to 5.5
Bidirectional -
1ms to 15ms
15ms to 85ms
85ms to 300ms
>1s
Input (WDI)
1s to 2s
<1s
>2s
Manual Reset 1.5 12
See All Supervisors (1 Monitored Voltage) (274)

Key Specifications:  Supervisors (2 Monitored Voltages)
Part Number Interface Reset Thresh.
(V)
Reset Out tRESET Watchdog Feature Watchdog Timeout Supervisor Features Reset Thresh. Accur.
(%)
ICC
(µA)
Active Low min @ +25°C max
MAX6732A  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
1ms to 15ms
15ms to 85ms
85ms to 300ms
>1s
Extended Setup Period
Input (WDI)
Input/Output (WDI/WDO)
1s to 2s
>2s
- 2.5 39
MAX6733A  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
1ms to 15ms
15ms to 85ms
85ms to 300ms
>1s
Extended Setup Period
Input (WDI)
Input/Output (WDI/WDO)
1s to 2s
>2s
- 2.5 39
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
1ms to 15ms
15ms to 85ms
85ms to 300ms
>1s
Extended Setup Period
Input (WDI)
Input/Output (WDI/WDO)
1s to 2s
>2s
- 2.5 37
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
1ms to 15ms
15ms to 85ms
85ms to 300ms
>1s
Extended Setup Period
Input (WDI)
Input/Output (WDI/WDO)
1s to 2s
>2s
- 2.5 37
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
1ms to 15ms
15ms to 85ms
85ms to 300ms
300ms to 1s
<1ms
>1s
Adjustable
Cap Adjustable
Input (WDI)
1s to 2s
<1s
>2s
Adjustable
Adjustable Reset Input 2 10
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
1ms to 15ms
15ms to 85ms
85ms to 300ms
300ms to 1s
<1ms
>1s
Adjustable
Cap Adjustable
Input (WDI)
1s to 2s
<1s
>2s
Adjustable
Adjustable Reset Input 2 10
See All Supervisors (2 Monitored Voltages) (84)

Key Specifications:  Supervisors (3 Monitored Voltages)
Part Number Interface Reset Thresh.
(V)
Reset Out tRESET Watchdog Feature Watchdog Timeout Supervisor Features Reset Thresh. Accur.
(%)
ICC
(µA)
Active Low min @ +25°C max
MAX6734A 
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
1ms to 15ms
15ms to 85ms
85ms to 300ms
>1s
Extended Setup Period
Input (WDI)
Input/Output (WDI/WDO)
1s to 2s
>2s
Adjustable Reset Input
Manual Reset
2.5 39
MAX6735A  Push-Pull 39
MAX6734  Open Drain 37
MAX6735  Push-Pull 37
See All Supervisors (3 Monitored Voltages) (32)

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



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