The ADM709 is a power supply monitor with reset function, which generates a system reset signal during power-up, power-down, and brownout conditions. It has various threshold range options and can operate at different temperatures.
The ADM709 is a precision power‑supply monitor that generates a system reset during power‑up, power‑down and brown‑out conditions. It holds the RESET line low when VCC falls below a selectable threshold and maintains a low output for at least 140 ms after VCC rises above the threshold. The device operates with supply voltages as low as 1 V and is available in 8‑pin DIP and SOIC packages.
Key features include three selectable voltage thresholds (+5 V, +3.3 V, +3 V), low quiescent current (35 µA typical), and optional external components for glitch immunity and bidirectional reset lines. Absolute‑maximum ratings, pin functions, and mechanical dimensions are detailed for design integration.
| VCC Operating Voltage Range | 1.0 V – 5.5 V |
|---|---|
| Supply Current (typical) | 35 µA |
| Reset Threshold (ADM709L) | 4.65 V |
| VCC to RESET Delay | 20 µs |
| RESET Active Time‑Out Period (typical) | 280 ms |
| Power Dissipation (N‑8 DIP) | 727 mW |
The ADM709 can operate with VCC as low as 1 V.
The RESET output is held low for at least 140 ms after VCC rises above the reset threshold.
The typical supply current is 35 µA.