ADM691ARZ-REEL

ADM691 is a microprocessor supervisory circuit. It offers complete single chip solutions for power supply monitoring and battery control functions in microprocessor systems. These functions include µP reset, backup battery switchover, watchdog timer, CMOS RAM write protection, and power failure warning. The complete family provides a variety of configurations to satisfy most microprocessor system requirements. It is fabricated using an advanced epitaxial CMOS process combining low power consumption (5mW), extremely fast chip enables gating (5ns) and high reliability. RESET assertion is guaranteed with VCC as low as 1V. In addition, the power switching circuitry is designed for minimal voltage drop there by permitting increased output current drive of upto 100mA without the need for an external pass transistor. It is mainly used in application such as microprocessor systems, computers, controllers, intelligent instruments, automotive systems etc.

• Specified over temperature, nominal reset time is 50ms or ADJ
• Precision voltage monitor, nominal VCC reset threshold is 4.65V
• Reset assertion down to 1V VCC, nominal watchdog timeout period is 100ms, 1.6s, ADJ
• Low switch on-resistance 1.5V normal, 20 ohm in backup
• High current drive is 100mA
• 600nA standby current, operating temperature range from -40°C to +85°C
• Automatic battery backup power switching, base drive ext PNP
• Extremely fast gating of chip enable signals is 5ns, chip enable signals
• Voltage monitor for power fail, operating voltage range from 4.75V to 5.5V
• Package style is 16-lead SOIC, superior upgrade for MAX690–MAX695

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