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Maxim > 方案 > 自动取款机(ATM)系统

看门狗定时器

数据资料
显示 标题/型号 关键优势
QV    带有RTC的8k x 8安全存储器,可设置防篡改检测等级
DS3665

业内首款8kB安全存储器,具有防篡改响应层
QV    带有RTC的1k x 8安全存储器,可设置防篡改检测等级
DS3644

业内首款安全存储器,具有防篡改响应层
QV  PDF 微处理器复位电路,提供电容可调的复位/看门狗延迟时间
MAX6746, MAX6747, MAX6748, MAX6749, MAX6750, MAX6751, MAX6752, MAX6753

QV  PDF 微处理器监控电路,窗式(最小/最大)看门狗定时及手动复位
MAX6323, MAX6324

业内首款µP监控电路,具有窗式看门狗定时器和手动复位
QV  PDF 引脚可设置的看门狗定时器
MAX6369, MAX6370, MAX6371, MAX6372, MAX6373, MAX6374




Key Specifications:   Supervisors (1 Monitored Voltage)
Part Number 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)
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
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
See All Supervisors (1 Monitored Voltage) (270)

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)
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:   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/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/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/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/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/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/8 9 -40 to +85
0 to +70
See All Watchdog Timers (7)



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