X40021 Overview
The X40020 bines power-on reset control, watchdog timer, supply voltage supervision, and secondary supervision, and manual reset, in one package. This bination lowers system cost, reduces board space requirements, and increases reliability. Applying voltage to VCC activates the power-on reset circuit which holds RESET/RESET active for a period of time.
X40021 Key Features
- Battery switch backup
- VOUT: 5mA to 50mA from VCC; 250µA from VBATT
- Fault detection register
- Selectable power-on reset timeout (0.05s, 0.2s, 0.4s, 0.8s)
- Selectable watchdog timer interval (25ms, 200ms, 1.4s, off)
- Debounced manual reset input
- Low power CMOS -25µA typical standby current, watchdog on -6µA typical standby current, watchdog off -1µA battery curren
- 400kHz 2-wire interface
- 2.7V to 5.5V power supply operation
- Available packages -14-lead SOIC, TSSOP