| Number of supplies monitored | 1 |
| Threshold voltage 1 (Typ) (V) | Adjustable |
| Features | Manual reset capable |
| Reset threshold accuracy (%) | 2 |
| Output driver type/reset output | Active-low, Open-drain |
| Time delay (ms) | Programmable |
| Rating | HiRel Enhanced Product |
| Watchdog timer WDI (sec) | None |
| Operating temperature range (C) | -55 to 125 |
- Controlled Baseline
- One Assembly Site
- One Test Site
- One Fabrication Site
- Extended Temperature Performance of
–55°Cto125°C - Enhanced Diminishing Manufacturing Sources
(DMS) Support - Enhanced Product-Change Notification
- Qualification Pedigree1
- Power-On Reset Generator With Adjustable
Delay Time: 1.25 ms to 10 s - Very Low Quiescent Current: 2.4μA Typical
- High Threshold Accuracy: 0.5% Typical
- Fixed Threshold Voltages for Standard Voltage
Rails From 0.9V to 5V and Adjustable Voltage
Down to 0.4V Are Available - Manual Reset (MR) Input
- Open-Drain RESET Output
- Temperature Range: –55°C to 125°C
- Small SOT-23 Package
The TPS3808xxx family of microprocessor supervisory circuits monitors system voltages from 0.4V to 5.0V, asserting an open-drain RESET signal when the SENSE voltage drops below a preset threshold or when the manual reset (MR) pin drops to a logic low. The RESET output remains low for the user-adjustable delay time after the SENSE voltage and manual reset (MR) return above the respective thresholds.
The TPS3808 uses a precision reference to achieve 0.5% threshold accuracy for VIT≤ 3.3 V. The reset delay time can be set to 20ms by disconnecting the CT pin, 300ms by connecting the CT pin to VDD using a resistor, or can be user-adjusted between 1.25ms and 10s by connecting the CT pin to an external capacitor. The TPS3808 has a very low typical quiescent current of 2.4μA, so it is well-suited to battery-powered applications. It is available in a small SOT-23 package, and is fully specified over a temperature range of ?55°C to +125°C (TJ).
