TPS3421 Description
The TPS3420, TPS3421, and TPS3422 (TPS342x) are low-current, ultrasmall, push-button reset timers. These devices use a long timing setup delay to provide the intended system reset, and avoid resets from short push-button closures or key presses. This reset configuration also allows for differentiation between software interrupts and hard system resets.
TPS3421 Key Features
- 1 Very Small Package: 1.45-mm × 1.00-mm SON
- Operating Range: 1.6 V to 6.5 V
- Single (TPS3422) or Dual (TPS3420 and
- Low Supply Current: 250 nA (Typical)
- Two-State Logic, User-Selectable Input Delay
- For Example: 7.5 s and 0 s
- Multiple Timing Options Available
- Fixed Time-out Pulse at RST (TPS3421 and TPS3422): 400 ms (Typical)
- Other Timing Options Available on Request
- Active Low, Open-Drain Output