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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    1k x 8安全存储器,提供可编程篡改检测分级和RTC
MAX36025B, MAX36025B+TRL

Industry's First Security Manager with Dual Encryption Engines, Authentication, and Tamper-Detection Hierarchy
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 引脚可设置看门狗定时器
MAX6369, MAX6370, MAX6371, MAX6372, MAX6373, MAX6374




Key Specifications:  Supervisors (1 Monitored Voltage)
Part Number Reset Thresh.
(V)
Reset Out tRESET Watchdog Feature Watchdog Timeout Supervisor Features Reset Thresh. Accur.
(%)
ICC
(µA)
Active Low min @ +25°C max
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)
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)
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)
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
- 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
- 2 10
MAX6323 
2.5 to 3.3
3.3 to 5.5
Push-Pull 85ms to 300ms
Input/Output (WDI/WDO)
Windowed
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
Manual Reset 1.5 45
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
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  Open Drain
See All Supervisors (2 Monitored Voltages) (84)

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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