Features and Benefits
- Precision Supply-Voltage Monitor:
- Fixed Reset Trip Voltage (MAX793/MAX795)
- Adjustable Reset Trip Voltage (MAX794)
- Guaranteed Reset Assertion to VCC = 1V
- Backup-Battery Power Switching—Battery Voltage Can Exceed VCC
- On-Board Gating of Chip-Enable Signals—7ns Max Propagation Delay
- Battery Freshness Seal
- Battery OK Output (MAX793)
- Uncommitted Voltage Monitor for Power-Fail or Low-Battery Warning
- Independent Watchdog Timer (1.6s timeout)
- Manual Reset Input
The MAX793/MAX794/MAX795 microprocessor (µP) supervisory circuits monitor and control the activities of +3.0V/+3.3V µPs by providing backup-battery switchover, among other features such as low-line indication, µP reset, write protection for CMOS RAM, and a watchdog (see the Selector Guide in the full data sheet). The backup-battery voltage can exceed VCC, permitting the use of 3.6V lithium batteries in systems using 3.0V to 3.3V for VCC.
The MAX793/MAX795 offer a choice of reset threshold voltage range (denoted by suffix letter): 3.00V to 3.15V (T), 2.85V to 3.00V (S), and 2.55V to 2.70V (R). The MAX794's reset threshold is set externally with a resistor divider. The MAX793/MAX794 are available in 16-pin DIP and narrow SO packages, and the MAX795 comes in 8-pin DIP and SO packages.
- Battery-Powered Computers/Controllers
- Critical µP Power Monitoring
- Embedded Controllers
- Intelligent Controllers
- Portable Equipment
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
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