| Number of supplies monitored | 1 |
| Threshold voltage 1 (Typ) (V) | 2.93, 4.55 |
| Features | Manual reset capable, Watchdog timer |
| Reset threshold accuracy (%) | 2.4 |
| Output driver type/reset output | Active-low, Push-pull |
| Time delay (ms) | 25 |
| TI functional safety category | Functional Safety-Capable |
| Rating | Automotive |
| Watchdog timer WDI (sec) | 0.2 |
| Operating temperature range (C) | -40 to 125 |
- Qualified for automotive applications
- AEC-Q100 Qualified With the Following Results:
- Device temperature grade 1: –40°C to 125°C
- Device HBM ESD classification level 2
- Device CDM ESD classification level C4B
- ESD protection exceeds 2000 V Per MIL-STD-883, Method 3015; using human body model (C= 100 pF, R = 1500 Ω)
- Power-on reset generator with fixed delay time of 200 ms (TPS3823/4/5/8-xx-Q1) or 25 ms (TPS3820-xx-Q1)
- Manual reset input (TPS3820/3/5/8-xx-Q1)
- Reset output available in active-low (TPS3820/3/4/5-xx-Q1), Active-High (TPS3824/5-xx-Q1), and open drain (TPS3828-xx-Q1)
- Supply voltage supervision range:
2.5 V, 3 V, 3.3 V, 5 V - Watchdog timer (TPS3820/3/4/8-xx-Q1)
- Supply current of 15 μA (Typical)
- 5-Pin SOT-23 package
- Temperature range: ?40°C to 125°C
For all new designs with TPS3820-xx-Q1, use the TPS3820-xxQPDBVRQ1 part number. The TPS3820-xxQP is functionally equivalent and a replacement to the TPS3820xxQ. The TPS3820-xxQDBVRQ1 is not recommended for new designs (NRND).
The TPS382x-xx-Q1 family of supervisors provide circuit initialization and timing supervision, primarily for DSP and processor-based systems. During power on, RESET asserts when the supply voltage VDD becomes greater than 1.1 V. Thereafter, the supply voltage supervisor monitors VDD and keeps RESET active low as long as VDD remains below the threshold voltage, VIT?. An internal timer delays the return of the output to the inactive state (high) to ensure proper system reset. The delay time, td, starts after VDD has risen above the threshold voltage VIT?. When the supply voltage drops below the threshold voltage VIT?, the output becomes active (low) again. No external components are required. All the devices of this family have a fixed-sense threshold voltage, VIT–, set by an internal voltage divider. The TPS382x-xx-Q1 family also offers watchdog time out options of 200 ms (TPS3820-xx-Q1) and 1.6 s (TPS3823/4/8-xx-Q1).
