Technical Specifications
Parameters and characteristics commom to parts in this series
| Specification | STWD100NXWY3F | STWD100 Series |
|---|---|---|
| Grade | - | Automotive |
| Mounting Type | Surface Mount | Surface Mount |
| Number of Voltages Monitored | 1 | 1 |
| Operating Temperature [Max] | 125 °C | 125 °C |
| Operating Temperature [Min] | -40 °C | -40 °C |
| Output | Open Drain or Open Collector | Open Drain or Open Collector |
| Package / Case | SC-74A, SOT-753 | SC-74A, SOT-753 |
| Qualification | - | AEC-Q100 |
| Reset | Active Low | Active Low |
| Reset Timeout | 71 ms | 2.3 - 71 ms |
| Reset Timeout | - | 1.12 s |
| Supplier Device Package | SOT-23-5 | SOT-23-5 |
| Type | Watchdog Circuit | Watchdog Circuit |
STWD100 Series
Watchdog timer circuit
| Part | Operating Temperature [Min] | Operating Temperature [Max] | Supplier Device Package | Reset Timeout | Package / Case | Number of Voltages Monitored | Mounting Type | Type | Output | Reset | Reset Timeout [Min] | Grade | Qualification |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
STMicroelectronics STWD100NXWY3F | -40 °C | 125 °C | SOT-23-5 | 71 ms | SC-74A, SOT-753 | 1 | Surface Mount | Watchdog Circuit | Open Drain or Open Collector | Active Low | |||
STMicroelectronics STWD100YNYWY3F | -40 °C | 125 °C | SOT-23-5 | SC-74A, SOT-753 | 1 | Surface Mount | Watchdog Circuit | Open Drain or Open Collector | Active Low | 1.12 s | Automotive | AEC-Q100 | |
STMicroelectronics STWD100NPWY3F | -40 °C | 125 °C | SOT-23-5 | 2.3 ms | SC-74A, SOT-753 | 1 | Surface Mount | Watchdog Circuit | Open Drain or Open Collector | Active Low | Automotive | AEC-Q100 | |
STMicroelectronics STWD100NYWY3F | -40 °C | 125 °C | SOT-23-5 | SC-74A, SOT-753 | 1 | Surface Mount | Watchdog Circuit | Open Drain or Open Collector | Active Low | 1.12 s | Automotive | AEC-Q100 |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 1.12 | |
| 10 | $ 1.00 | |||
| 25 | $ 0.95 | |||
| 100 | $ 0.78 | |||
| 250 | $ 0.73 | |||
| 500 | $ 0.64 | |||
| 1000 | $ 0.51 | |||
| Digi-Reel® | 1 | $ 1.12 | ||
| 10 | $ 1.00 | |||
| 25 | $ 0.95 | |||
| 100 | $ 0.78 | |||
| 250 | $ 0.73 | |||
| 500 | $ 0.64 | |||
| 1000 | $ 0.51 | |||
| Tape & Reel (TR) | 3000 | $ 0.47 | ||
| 6000 | $ 0.45 | |||
| 15000 | $ 0.43 | |||
| Newark | Each (Supplied on Cut Tape) | 1 | $ 1.18 | |
| 10 | $ 0.91 | |||
| 25 | $ 0.84 | |||
| 50 | $ 0.81 | |||
| 100 | $ 0.77 | |||
| 250 | $ 0.73 | |||
| 500 | $ 0.71 | |||
| 1000 | $ 0.69 | |||
Description
General part information
STWD100 Series
The STWD100 watchdog timer circuits are self-contained devices which prevent system failures that are caused by certain types of hardware errors (such as, non-responding peripherals and bus contention) or software errors (such as a bad code jump and a code stuck in loop).
The STWD100 watchdog timer has an input, WDI, and an output,WDO. The input is used to clear the internal watchdog timer periodically within the specified timeout period, twd. While the system is operating correctly, it periodically toggles the watchdog input, WDI. If the system fails, the watchdog timer is not reset, a system alert is generated and the watchdog output,WDO, is asserted.
The STWD100 circuit also has an enable pin,EN, which can enable or disable the watchdog functionality. TheENpin is connected to the internal pull-down resistor. The device is enabled if theENpin is left floating.
Documents
Technical documentation and resources