PMIC - Supervisors SC-74A, SOT-753 5V -40°C~125°C TA STWD100 Automotive, AEC-Q100 IC WATCHDOG TIME CIRCUIT SOT23-5
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Nov 20, 2021
Afra Addison
The Watchdog Timer on Arduino
PMIC - Supervisors SC-74A, SOT-753 5V -40°C~125°C TA STWD100 Automotive, AEC-Q100 IC WATCHDOG TIME CIRCUIT SOT23-5
The STWD100NYWY3F watchdog timer circuits are self-contained devices. This post will unlock more details about STWD100NYWY3F, including its pinout, datasheet, features and more about STWD100NYWY3F. Welcome your RFQ!
STWD100NYWY3F
| Quantity | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.85035 | $0.85 |
| 10+ | $0.80222 | $8.02 |
| 100+ | $0.75681 | $75.68 |
| 500+ | $0.71397 | $356.99 |
| 1000+ | $0.67356 | $673.56 |
|
Name |
pin |
Description |
|
WDO |
1 |
Watchdog output |
|
GND |
2 |
Ground |
|
EN |
3 |
Enable pin |
|
WDI |
4 |
Watchdog input |
|
Vcc |
5 |
Supply voltage |
STWD100NYWY3F Symbol
STWD100NYWY3F Footprint
STWD100NYWY3F 3D Model
The STWD100NYWY3F watchdog timer circuit is a self-contained device that prevents 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 a loop). The STWD100NYWY3F 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, two. 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 STWD100NYWY3F circuit also has an enable pin, EN, which can enable or disable the watchdog functionality. The EN pin is connected to the internal pull-down resistor. The device is enabled if the EN pin is left floating.
Current consumption 13 µA typ.
Available watchdog timeout periods are 3.4 ms, 6.3 ms, 102 ms, and 1.6 s
Chip enable input
Open drain or push-pull WDO output
Operating temperature range: –40 to 125 °C
Packages: SOT23-5 and SC70-5 (SOT323-5)
ESD performance
-HBM: 2000 V
-CDM: 1000 V
Automotive qualified
Telecommunications
Alarm systems
Industrial equipment
Networking
Medical equipment
UPS (uninterruptible power supply)
Automotive
The STWD100NYWY3F block diagram is given below:
STWD100NYWY3F Block Diagram
Microprocessors with bidirectional reset pins can contend with the STWD100NYWY3F watchdog output, WDO. For example, if the WDO output is driven high and the micro wants to pull it low, signal contention is the result. To prevent this from occurring, connect a 4.7 kΩ resistor between the WDO output and the microprocessors reset I/O as in the figure below.
STWD100NYWY3F Application Circuit
The STWD100NYWY3F device is used to detect an out-of-control MCU. The user has to ensure watchdog reset within the watchdog timeout period, otherwise, the watchdog output is asserted and the MCU is restarted. The STWD100NYWY3F can also be enabled or disabled by the chip enable pin. The following figure is the operation circuit of STWD100NYWY3F.
STWD100NYWY3F Operation Circuit
STMicroelectronics STWD100NYWY3F technical specifications, attributes, parameters and parts with similar specifications to STMicroelectronics STWD100NYWY3F.
STMicroelectronics STWD100NYWY3F technical specifications, attributes, parameters and parts with similar specifications to STMicroelectronics STWD100NYWY3F.
| Product Attribute | Attribute Value | |
|---|---|---|
| Lifecycle Status | ACTIVE (Last Updated: 7 months ago) | |
| Factory Lead Time | 14 Weeks | |
| Contact Plating | Gold | |
| Mount | Surface Mount | |
| Mounting Type | Surface Mount | |
| Package / Case | SC-74A, SOT-753 | |
| Number of Pins | 5Pins | |
| Weight | 29.993795mg | |
| Number of Elements | 1 Element | |
| Watchdog Timers | Yes | |
| Operating Temperature | -40°C~125°C TA | |
| Packaging | Cut Tape (CT) | |
| Series | Automotive, AEC-Q100 | |
| JESD-609 Code | e3 | |
| Part Status | Active |
| Product Attribute | Attribute Value | |
|---|---|---|
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | |
| Number of Terminations | 5Terminations | |
| ECCN Code | EAR99 | |
| Type | Watchdog Circuit | |
| Terminal Finish | Tin (Sn) | |
| Power Rating | 320mW | |
| Max Power Dissipation | 320mW | |
| Terminal Position | DUAL | |
| Terminal Form | GULL WING | |
| Supply Voltage | 5V | |
| Base Part Number | STWD100 | |
| Output | Open Drain or Open Collector | |
| Pin Count | 5 | |
| Operating Supply Voltage | 5V | |
| Max Supply Voltage | 7V |
| Product Attribute | Attribute Value | |
|---|---|---|
| Min Supply Voltage | -300mV | |
| Nominal Supply Current | 13μA | |
| Power Dissipation | 320mW | |
| Output Current | 20μA | |
| Reset | Active Low | |
| Reset Timeout | 1.12s Minimum | |
| Ambient Temperature Range High | 125°C | |
| Height | 1.45mm | |
| Length | 2.9mm | |
| Width | 1.6mm | |
| Radiation Hardening | No | |
| RoHS Status | ROHS3 Compliant | |
| Lead Free | Lead Free |
STWD100NYWY3F Package
STMicroelectronics is a global independent semiconductor company and is a leader in developing and delivering semiconductor solutions across the spectrum of microelectronics applications. An unrivalled combination of silicon and system expertise, manufacturing strength, Intellectual Property (IP) portfolio and strategic partners positions the Company at the forefront of System-on-Chip (SoC) technology and its products play a key role in enabling today's convergence trends.
Download datasheets and manufacturer documentation for STMicroelectronics STWD100NYWY3F.
Download datasheets and manufacturer documentation for STWD100NYWY3F
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