Overview
The STWD100YNXWY3F 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 code loops. The watchdog timer ensures system reliability by periodically monitoring the system's operation and generating a system alert if the system fails to reset the watchdog within the specified timeout period.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Current Consumption | 13 µA | |
| Watchdog Timeout Periods | 3.4 ms, 6.3 ms, 102 ms, 1.6 s | |
| Chip Enable Input | Yes | |
| Watchdog Output Configuration | Open Drain or Push-Pull | |
| Operating Temperature Range | -40 to 125 °C | |
| Package Type | SOT23-5 and SC70-5 (SOT323-5) | |
| ESD Performance | HBM: 2000 V, CDM: 1000 V | |
| Supply Voltage Range | 2.7 to 5.5 V |
Key Features
- Low current consumption of 13 µA typical, making it energy-efficient.
- Multiple watchdog timeout periods available: 3.4 ms, 6.3 ms, 102 ms, and 1.6 s.
- Chip enable input allows for enabling or disabling the watchdog functionality.
- Watchdog output available in open drain or push-pull configuration.
- Wide operating temperature range from -40 to 125 °C.
- Available in SOT23-5 and SC70-5 (SOT323-5) packages.
- High ESD performance with HBM: 2000 V and CDM: 1000 V.
- Automotive qualified, ensuring reliability in demanding environments.
Applications
- Telecommunications equipment
- Alarm systems
- Industrial equipment
- Networking devices
- Medical equipment
- Uninterruptible Power Supplies (UPS)
- Automotive systems
Q & A
- What is the primary function of the STWD100YNXWY3F?
The primary function of the STWD100YNXWY3F is to prevent system failures caused by hardware or software errors by monitoring the system and generating an alert if the system fails to reset the watchdog within the specified timeout period.
- What are the available watchdog timeout periods for the STWD100YNXWY3F?
The available watchdog timeout periods are 3.4 ms, 6.3 ms, 102 ms, and 1.6 s.
- How does the chip enable input work on the STWD100YNXWY3F?
The chip enable input allows for enabling or disabling the watchdog functionality. The device is enabled if the EN pin is left floating or if a positive pulse on the enable pin is longer than 1 µs.
- What are the operating temperature ranges for the STWD100YNXWY3F?
The operating temperature range is from -40 to 125 °C.
- What types of packages are available for the STWD100YNXWY3F?
The device is available in SOT23-5 and SC70-5 (SOT323-5) packages.
- What is the ESD performance of the STWD100YNXWY3F?
The ESD performance is HBM: 2000 V and CDM: 1000 V.
- Is the STWD100YNXWY3F automotive qualified?
Yes, the STWD100YNXWY3F is automotive qualified.
- What is the typical current consumption of the STWD100YNXWY3F?
The typical current consumption is 13 µA.
- How does the watchdog output work on the STWD100YNXWY3F?
The watchdog output is available in open drain or push-pull configuration and is asserted if the system fails to reset the watchdog within the specified timeout period.
- What are some common applications for the STWD100YNXWY3F?
Common applications include telecommunications equipment, alarm systems, industrial equipment, networking devices, medical equipment, UPS, and automotive systems.
