MAX817L
+5V Microprocessor Supervisory Circuits
Low-Power, Small Size Microprocessor Supervisory Circuit with Battery-Backup
Part Details
- 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)
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.
Applications
- Battery-Powered Computers/Controllers
- Critical µP Monitoring
- Embedded Controllers
- Intelligent Instruments
- Portable Equipment
Documentation
Data Sheet 1
Reliability Data 1
This is the most up-to-date revision of the Data Sheet.
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Battery Backup IC 4 | ||
| MAX6361 | PRODUCTION | SOT23, Low-Power Microprocessor Supervisory Circuits with Battery Backup |
| MAX6362 | PRODUCTION | SOT23, Low-Power Microprocessor Supervisory Circuits with Battery Backup |
| MAX6363 | PRODUCTION | SOT23, Low-Power Microprocessor Supervisory Circuits with Battery Backup |
| MAX6364 | PRODUCTION | SOT23, Low-Power Microprocessor Supervisory Circuits with Battery Backup |
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