The TPS380x family of supervisory circuits monitor supply voltages to provide circuit initialization and timing supervision, primarily for DSPs and other processor-based systems.
These devices assert a push-pull RESET signal when the SENSE (adjustable version) or VDD (fixed version) drops below a preset threshold. The RESET output remains asserted for the factory programmed delay time after the SENSE or VDD return above its threshold.
The TPS380x devices, except the TPS3801-01, incorporate a manual reset input (MR). A low level at MR causes RESET to become active.
The TPS380x uses a precision reference to achieve an overall threshold accuracy of 2%—2.5%. These devices are available in a 5-pin SC-70 package, which is only about half the size of a 5-pin SOT-23 package.
The TPS380x devices are fully specified over a temperature range of –40°C to +85°C.
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| Threshold Voltage 1 (Typ) (V) |
| Number of supplies monitored |
| VCC (Max) (V) |
| VCC (Min) (V) |
| Output driver type/reset output |
| Time Delay (ms) |
| Features |
| Rating |
| Operating temperature range (C) |
| Watchdog timer WDI (sec) |
| TPS3801 | TPS3800G27 | TPS3802 |
|---|---|---|
|
Adjustable 1.71 2.25 2.64 2.93 4 4.55 |
2.5 |
2.64 2.93 |
| 1 | 1 | 1 |
| 6 | 6 | 6 |
| 2 | 2 | 2 |
|
Active-low Push-pull |
Active-low Push-pull |
Active-low Push-pull |
| 200 | 100 | 400 |
|
Active-low enable Manual reset |
Active-low enable Manual reset |
Active-low enable Manual reset |
| Catalog | Catalog | Catalog |
| -40 to 85 | -40 to 85 | -40 to 85 |
| None | None | None |
| Order now | Order now | Order now |
