Processor Supervisor Adj 3V/3.3V 16-Pin SOIC N T/R

The MAX793 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 . 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 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 MAX793’s reset threshold is set externally with a resistor divider. The MAX793 is a available in 16-pin DIP and narrow SO packages, and the MAX795 comes in 8-pin DIP and SO packages.

• Precision Supply-Voltage Monitor: Fixed Reset Trip Voltage (MAX793) Adjustable Reset Trip Voltage (MAX793)
• 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 MAX793 Only
• 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