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MAX6746, MAX6747, MAX6748, MAX6749, MAX6750, MAX6751, MAX6752, MAX6753
微处理器复位电路，提供电容可调的复位/看门狗延迟时间
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概述
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完整的数据资料
(PDF, 612kB)
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英文  下载
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MAX6746–MAX6753是低功耗、微处理器(µP)监控电路，用于监视1.575V至5V单/双路系统电源电压，并提供稳定的复位输出和看门狗功能。当VCC电源电压或RESET IN跌至复位门限以下或手动复位被拉至低电平时，这些器件会触发复位。在VCC和RESET IN上升至复位门限以上后，复位信号在一个复位超时周期内仍保持复位有效。复位功能不受电源瞬变影响。
MAX6746–MAX6753具有精度为±2%的工厂预置复位门限，范围1.575V至5.0V，级差100mV。
复位和看门狗延时可通过外部电容调节。MAX6746–MAX6751带有一个看门狗选择输入引脚，能够使看门狗超时周期扩展128倍。MAX6752/MAX6753带有窗式看门狗定时器，用于检测是否超出预期的工作窗口。
MAX6746–MAX6753具有推挽式或漏极开路/RESET输出。MAX6746–MAX6753采用8引脚SOT23封装，工作于汽车级温度范围(-40°C至+125°C)。
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| 关键特性 |
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应用/使用 |
| 工厂预置复位门限，范围1.575V至5V，级差100mV
| | 可调复位门限选项
| | 单/双路电压监视
| | 电容可调复位超时周期
| | 电容可调看门狗超时周期
| | 最小/最大(加窗)看门狗选项
| | 手动复位输入选项
| | VCC ≥ 1V时保证/RESET正常输出
| | 3.7µA电源电流
| | 推挽式或漏极开路/RESET输出选项
| | 不受电源瞬变影响
| | 小尺寸、8引脚SOT23封装 |
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| 汽车
| | 电池供电计算机/控制器
| | 计算机
| | 精确的µP监控
| | 嵌入式控制器
| | 智能仪表
| | 医疗装置
| | 便携式设备
| | 机顶盒
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| 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) |
Price |
| Active Low |
min |
@ +25°C |
max |
See Notes |
| MAX6746 |
| 1.2 to 1.8 | | 1.8 to 2.5 | | 2.5 to 3.3 | | 3.3 to 5.5 |
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Push-Pull |
| 1ms to 15ms | | 15ms to 85ms | | 85ms to 300ms | | 300ms to 1s | | <1ms | | >1s | | Adjustable |
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| Cap Adjustable | | Input (WDI) |
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Manual Reset |
2 |
10 |
$1.20 @1k |
| MAX6747 |
Open Drain |
| Cap Adjustable | | Input (WDI) |
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Manual Reset |
$1.20 @1k |
| MAX6748 |
Push-Pull |
| Cap Adjustable | | Input (WDI) |
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Adjustable Reset Input |
$1.20 @1k |
| MAX6749 |
Open Drain |
| Cap Adjustable | | Input (WDI) |
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Adjustable Reset Input |
$1.20 @1k |
| MAX6752 |
Push-Pull |
| Cap Adjustable | | Input (WDI) | | Windowed |
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- |
$1.50 @1k |
| MAX6753 |
Open Drain |
| Cap Adjustable | | Input (WDI) | | Windowed |
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- |
$1.50 @1k |
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查看所有Supervisors (1 Monitored Voltage) (274)
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| 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) |
Price |
| Active Low |
min |
@ +25°C |
max |
See Notes |
| MAX6750 |
| Factory Fixed | | R/C Adjustable |
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| 1.2 to 1.8 | | 1.8 to 2.5 | | 2.5 to 3.3 | | 3.3 to 5.5 |
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Push-Pull |
| 1ms to 15ms | | 15ms to 85ms | | 85ms to 300ms | | 300ms to 1s | | <1ms | | >1s | | Adjustable |
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| Cap Adjustable | | Input (WDI) |
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Adjustable Reset Input |
2 |
10 |
$1.50 @1k |
| MAX6751 |
Open Drain |
$1.50 @1k |
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查看所有Supervisors (2 Monitored Voltages) (84)
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图表
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引脚配置
引脚配置
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参考文献： 19-2530;
Rev. 3;
2006-06-02
本页最后一次更新: 2009-10-14
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