the adm8696 and adm8697 are two microprocessor supervisory circuits, which have functions of power failure detection, low voltage detection, reset and watchdog, and features of adjustable low voltage monitoring, power normal/reset delay, low switch on resistance, low standby current, automatic battery backup switching, etc.
The ADM8696 and ADM8697 are single‑chip supervisory circuits that monitor supply voltage, generate reset signals, provide watchdog timing, and switch to a backup battery when needed. They are offered in 16‑pin DIP and TSSOP packages and operate from 3.0 V to 5.5 V (VCC) with a low‑voltage backup range of 2.0 V to 3.0 V (VBATT).
Key features include an adjustable reset threshold, selectable watchdog timeout (100 ms to 1.6 s or programmable), up to 100 mA output current on VOUT, and optional chip‑enable gating for RAM write protection. The device also offers ESD protection and a low on‑resistance internal switch for battery backup.
| VCC Operating Voltage Range | 3.0 V – 5.5 V |
|---|---|
| VBATT Operating Voltage Range | 2.0 V – 3.0 V |
| Maximum Output Current (VOUT) | 100 mA |
| Typical Supply Current (no load) | 115 µA |
| Reset Timeout Delay | 35 ms – 70 ms |
| Watchdog Timeout Period (internal oscillator) | 1.0 s – 2.25 s |
| Low Line Threshold (LLIN) | 1.25 V – 1.35 V |
| Battery Switchover Threshold | 70 mV |
The VOUT pin can source up to 100 mA.
The watchdog timeout can be set to a short 100 ms period, a long 1.6 s period, or an adjustable value using an external clock or capacitor.
VCC operates from 3.0 V to 5.5 V and VBATT from 2.0 V to 3.0 V.
The reset pulse width can be programmed between 35 ms and 70 ms.