Overview
The STWD100NPWY3F is a watchdog timer circuit produced by STMicroelectronics. This self-contained device is designed to prevent system failures caused by hardware errors, such as non-responding peripherals and bus contention, or software errors, such as bad code jumps and loops. The STWD100NPWY3F ensures system reliability by periodically monitoring the system's operation and generating a system alert if the system fails to reset the watchdog timer within the specified timeout period.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Temperature Min (°C) | -40.0 |
| Operating Temperature Max (°C) | 125.0 |
| ECCN US | EAR99 |
| ECCN EU | NEC |
| Packing Type | Tape And Reel |
| RoHS Compliance | Ecopack3 |
| Grade | Industrial |
| Package Name | SOT23-5L |
| Current Consumption | 13 µA (typ.) |
| Watchdog Timeout Periods | 3.4 ms, 6.3 ms, 102 ms, 1.6 s |
| ESD Performance | HBM: 2000 V, CDM: 1000 V |
Key Features
- Input, WDI, and output, WDO, for watchdog timer functionality
- Chip enable input, EN, to enable or disable the watchdog
- Available watchdog timeout periods: 3.4 ms, 6.3 ms, 102 ms, and 1.6 s
- Open drain or push-pull WDO output configuration
- Operating temperature range: –40 to 125 °C
- Packages: SOT23-5 and SC70-5 (SOT323-5)
- Automotive qualified and ESD performance: HBM 2000 V, CDM 1000 V
Applications
- Communications equipment
- Computers and peripherals
- Industrial equipment
- Personal electronics
- Telecommunications
- Alarm systems
- Networking
- Medical equipment
- UPS (Uninterruptible Power Supply)
- Automotive systems
Q & A
- What is the primary function of the STWD100NPWY3F?
The primary function of the STWD100NPWY3F is to prevent system failures caused by hardware or software errors by monitoring the system and generating an alert if the watchdog timer is not reset within the specified timeout period.
- What are the available watchdog timeout periods for the STWD100NPWY3F?
The available watchdog timeout periods are 3.4 ms, 6.3 ms, 102 ms, and 1.6 s.
- What is the operating temperature range of the STWD100NPWY3F?
The operating temperature range is –40 to 125 °C.
- What types of packages are available for the STWD100NPWY3F?
The device is available in SOT23-5 and SC70-5 (SOT323-5) packages.
- How does the chip enable input (EN) function?
The chip enable input (EN) can enable or disable the watchdog functionality. The device is enabled if the EN pin is left floating.
- What is the typical current consumption of the STWD100NPWY3F?
The typical current consumption is 13 µA.
- Is the STWD100NPWY3F RoHS compliant?
- What are some common applications of the STWD100NPWY3F?
- How does the watchdog output (WDO) function?
The watchdog output (WDO) is asserted if the system fails to reset the watchdog timer within the specified timeout period. It is available in open drain or push-pull configuration.
- What is the ESD performance of the STWD100NPWY3F?
The ESD performance is HBM 2000 V and CDM 1000 V.
