This document is about the STM690A/692A/703/704/802/805/817/818/819 5V Supervisor with Battery Switchover product manual.
The STM690A, STM692A, STM703, STM704, STM802, STM805, STM817, STM818 and STM819 supervisors are 5 V supervisory devices that provide reset, watchdog, battery‑switchover and power‑fail monitoring for microprocessor systems. They are offered in 8‑pin SOIC and TSSOP packages and support external LPSRAM non‑volatile storage.
The manual includes functional block diagrams, pin descriptions, timing waveforms, electrical characteristics, package mechanical data, ordering information and a revision history. It serves designers and system integrators who need to implement reliable power‑management and reset control in their designs.
| Operating Voltage | 5 V |
|---|---|
| Low Battery Supply Current | 0.4 µA (typical) |
| Power‑fail Comparator Supply Current | 40 µA (typical) |
| Watchdog Timer Period | 1.6 s (typical) |
| Reset Assertion Voltage | Down to V_oc = 1.0 V |
| Operating Temperature Range | -40 °C to 85 °C (Industrial Grade) |
The watchdog timer timeout is typically 1.6 seconds.
The low‑battery supply current is typically 0.4 µA.
The devices operate from –40 °C to 85 °C (industrial grade).