STWD100NXWY3F
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STMicroelectronics STWD100NXWY3F

Manufacturer No:
STWD100NXWY3F
Manufacturer:
STMicroelectronics
Package:
Tape & Reel (TR)
Description:
IC SUPERVISOR 1 CHANNEL SOT23-5
Delivery:
Payment:
iso14001
iso45001
iso9001
iso13485

Product Introduction

Overview

The STWD100NXWY3F is a self-contained watchdog timer circuit produced by STMicroelectronics. This device is designed to prevent system failures caused by hardware errors such as non-responding peripherals and bus contention, or software errors like bad code jumps and code loops. The watchdog timer ensures that the system remains operational by periodically resetting the watchdog input within a specified timeout period. If the system fails to reset the watchdog, it generates a system alert and asserts the watchdog output.

Key Specifications

Attribute Value Unit
Package Style SOT23-5 (SOT-25)
Mounting Method Surface Mount
Current Consumption 13 µA (typical)
Watchdog Timeout Periods 3.4 ms, 6.3 ms, 102 ms, 1.6 s
Chip Enable Input Yes
Watchdog Output (WDO) Open drain or push-pull
Operating Temperature Range –40 to +125 °C
ESD Performance HBM: 2000 V, CDM: 1000 V
Supply Voltage 2.7 to 5.5 V
Output Current 20 mA
Power Dissipation 320 mW

Key Features

  • Current consumption of 13 µA (typical)
  • Available watchdog timeout periods: 3.4 ms, 6.3 ms, 102 ms, and 1.6 s
  • Chip enable input (EN) to enable or disable the watchdog functionality
  • Open drain or push-pull watchdog output (WDO)
  • Operating temperature range: –40°C to +125°C
  • ESD performance: HBM 2000 V, CDM 1000 V
  • Automotive qualified

Applications

  • Telecommunications
  • Alarm systems
  • Industrial equipment
  • Networking
  • Medical equipment
  • Uninterruptible Power Supply (UPS)
  • Automotive systems

Q & A

  1. What is the primary function of the STWD100NXWY3F?

    The primary function of the STWD100NXWY3F is to prevent system failures caused by hardware or software errors by acting as a watchdog timer.

  2. What are the available watchdog timeout periods for the STWD100NXWY3F?

    The available watchdog timeout periods are 3.4 ms, 6.3 ms, 102 ms, and 1.6 s.

  3. How does the chip enable input (EN) work on the STWD100NXWY3F?

    The chip enable input (EN) allows the watchdog functionality to be enabled or disabled. If the EN pin is left floating, the device is enabled due to the internal pull-down resistor.

  4. What is the operating temperature range of the STWD100NXWY3F?

    The operating temperature range is –40°C to +125°C.

  5. What types of outputs does the STWD100NXWY3F have?

    The STWD100NXWY3F has an open drain or push-pull watchdog output (WDO).

  6. What is the typical current consumption of the STWD100NXWY3F?

    The typical current consumption is 13 µA.

  7. What are the ESD performance ratings for the STWD100NXWY3F?

    The ESD performance ratings are HBM 2000 V and CDM 1000 V.

  8. Is the STWD100NXWY3F automotive qualified?

    Yes, the STWD100NXWY3F is automotive qualified.

  9. What are some common applications for the STWD100NXWY3F?

    Common applications include telecommunications, alarm systems, industrial equipment, networking, medical equipment, UPS, and automotive systems.

  10. What package styles are available for the STWD100NXWY3F?

    The STWD100NXWY3F is available in SOT23-5 and SC70-5 (SOT323-5) package styles.

Product Attributes

Type:Watchdog Circuit
Number of Voltages Monitored:1
Voltage - Threshold:- 
Output:Open Drain or Open Collector
Reset:Active Low
Reset Timeout:71ms Minimum
Operating Temperature:-40°C ~ 125°C (TA)
Mounting Type:Surface Mount
Package / Case:SC-74A, SOT-753
Supplier Device Package:SOT-23-5
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Similar Products

Part Number STWD100NXWY3F STWD100NYWY3F STWD100YNXWY3F STWD100NPWY3F STWD100NWWY3F
Manufacturer STMicroelectronics STMicroelectronics STMicroelectronics STMicroelectronics STMicroelectronics
Product Status Active Active Active Active Active
Type Watchdog Circuit Watchdog Circuit Watchdog Circuit Watchdog Circuit Watchdog Circuit
Number of Voltages Monitored 1 1 1 1 1
Voltage - Threshold - - - - -
Output Open Drain or Open Collector Open Drain or Open Collector Open Drain or Open Collector Open Drain or Open Collector Open Drain or Open Collector
Reset Active Low Active Low Active Low Active Low Active Low
Reset Timeout 71ms Minimum 1.12s Minimum 71ms Minimum 2.3ms Minimum 4.3ms Minimum
Operating Temperature -40°C ~ 125°C (TA) -40°C ~ 125°C (TA) -40°C ~ 125°C -40°C ~ 125°C (TA) -40°C ~ 125°C (TA)
Mounting Type Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount
Package / Case SC-74A, SOT-753 SC-74A, SOT-753 SC-74A, SOT-753 SC-74A, SOT-753 SC-74A, SOT-753
Supplier Device Package SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5

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