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电路监控、电压监测器及排序器 
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The MAX817/MAX818/MAX819 microprocessor (µP) supervisory circuits simplify power-supply monitoring, battery control, and chip-enable gating in µP systems by reducing the number of components required. These devices are designed for use in +5V-powered systems. Low supply current (11µA typical) and small package size make these devices ideal for portable applications. The MAX817/MAX818/MAX819 are specifically designed to ignore fast transients on VCC. Other supervisory functions include active-low reset, backup-battery switchover, watchdog input, battery freshness seal, and chip-enable gating. The Selector Guide in the full data sheet lists the specific functions available from each device.
These devices offer two pretrimmed reset threshold voltages for ±5% or ±10% power supplies: 4.65V for the L versions and 4.40V for the M versions. The MAX817/ MAX818/MAX819 are available in space-saving µMAX® packages, as well as 8-pin DIP/SO.
These devices offer two pretrimmed reset threshold voltages for ±5% or ±10% power supplies: 4.65V for the L versions and 4.40V for the M versions. The MAX817/ MAX818/MAX819 are available in space-saving µMAX® packages, as well as 8-pin DIP/SO.
主要特征
- Precision Supply-Voltage Monitor:
- 4.65V (MAX81_L)
- 4.40V (MAX81_M)
- 11µA Quiescent Supply Current
- 200ms Reset Time Delay
- Watchdog Timer with 1.6sec Timeout (MAX817/MAX818)
- Battery-Backup Power Switching; Battery Voltage Can Exceed VCC
- Battery Freshness Seal
- On-Board, 3ns Gating of Chip-Enable Signals (MAX818)
- Uncommitted Voltage Monitor for Power-Fail or Low-Battery Warning (MAX817/MAX819)
- Manual Reset Input (MAX819)
应用/用途
- 电池供电计算机/控制器
- 精确的µP监控
- 嵌入式控制器
- 智能仪表
- 便携式设备
Parametric specs for Battery Backup Circuits
| Reset Thresh. (V) | 3.3 to 5.5 |
| Reset Out | Active Low Push-Pull |
| ICC (µA) (max) | 60 |
| Oper. Temp. (°C) | -40 to +85 0 to +70 |
| Package/Pins | PDIP/8 SOIC (N)/8 UMAX/8 |
| Budgetary Price (See Notes) | $2.90 @1k |
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技术文档
| 数据资料 | +5V微处理器监控电路 | Mar 14, 2006 |
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参量
Parametric specs for Battery Backup Circuits
| Reset Thresh. (V) | 3.3 to 5.5 |
| Reset Out | Active Low Push-Pull |
| ICC (µA) (max) | 60 |
| Oper. Temp. (°C) | -40 to +85 0 to +70 |
| Package/Pins | PDIP/8 SOIC (N)/8 UMAX/8 |
| Budgetary Price (See Notes) | $2.90 @1k |
主要特征
- Precision Supply-Voltage Monitor:
- 4.65V (MAX81_L)
- 4.40V (MAX81_M)
- 11µA Quiescent Supply Current
- 200ms Reset Time Delay
- Watchdog Timer with 1.6sec Timeout (MAX817/MAX818)
- Battery-Backup Power Switching; Battery Voltage Can Exceed VCC
- Battery Freshness Seal
- On-Board, 3ns Gating of Chip-Enable Signals (MAX818)
- Uncommitted Voltage Monitor for Power-Fail or Low-Battery Warning (MAX817/MAX819)
- Manual Reset Input (MAX819)
应用/用途
- 电池供电计算机/控制器
- 精确的µP监控
- 嵌入式控制器
- 智能仪表
- 便携式设备
描述
The MAX817/MAX818/MAX819 microprocessor (µP) supervisory circuits simplify power-supply monitoring, battery control, and chip-enable gating in µP systems by reducing the number of components required. These devices are designed for use in +5V-powered systems. Low supply current (11µA typical) and small package size make these devices ideal for portable applications. The MAX817/MAX818/MAX819 are specifically designed to ignore fast transients on VCC. Other supervisory functions include active-low reset, backup-battery switchover, watchdog input, battery freshness seal, and chip-enable gating. The Selector Guide in the full data sheet lists the specific functions available from each device.
These devices offer two pretrimmed reset threshold voltages for ±5% or ±10% power supplies: 4.65V for the L versions and 4.40V for the M versions. The MAX817/ MAX818/MAX819 are available in space-saving µMAX® packages, as well as 8-pin DIP/SO.
These devices offer two pretrimmed reset threshold voltages for ±5% or ±10% power supplies: 4.65V for the L versions and 4.40V for the M versions. The MAX817/ MAX818/MAX819 are available in space-saving µMAX® packages, as well as 8-pin DIP/SO.
技术文档
| 数据资料 | +5V微处理器监控电路 | Mar 14, 2006 |
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