ADM8691ARNZ

The ADM8690/ADM8691/ADM8695 supervisory circuits offer complete single-chip solutions for power supply monitoring and battery control functions in microprocessor systems. These functions include microprocessor 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. The ADM8690/ADM8691/ADM8695 are fabricated using an advanced epitaxial CMOS process that combines low power consumption (0.7 mW), extremely fast chip enable gating (3 ns), and high reliability. RESET assertion is guaranteed with VCC as low as 1 V. In addition, the power switching circuitry is designed for minimal voltage drop, thereby permitting increased output current drive of up to 100 mA without the need for an external pass transistor.

Applications

• Microprocessor systems
• Computers
• Controllers
• Intelligent instruments
• Automotive systems

Key features

• Upgrade for the ADM690, ADM691, ADM695 and for the MAX690, MAX691, MAX695
• Specified over temperature
• Low power consumption: 0.7 mW
• Precision voltage monitor
• Reset assertion down to 1 Vc
• Low switch on resistance: 0.7 Ω normal, 7 Ω in backup
• High current drive: 100 mA
• Watchdog timer: 100 ms, 1.6 sec, or adjustable
• Standby current: 400 nA
• Automatic battery backup power switching
• Extremely fast gating of chip enable signals (3 ns)
• Voltage monitor for power fail
• Available in TSSOP package