ams OSRAM

AS1904A22

AS1904A22 Description

The AS1904A22 is a single-channel voltage supervisor IC designed for power management applications. Manufactured by ams OSRAM, this device is part of the Power Management (PMIC) category and is housed in a compact SOT23-3 package, making it suitable for space-constrained designs. The AS1904A22 features a voltage threshold of 2.2V, ensuring reliable monitoring of a single voltage rail. It is designed with a reset timeout of at least 60ms, providing sufficient time for system stabilization after a power event. The reset output is active low, which is a common requirement for many microcontroller and microprocessor reset circuits.

AS1904A22 Features

• Voltage Monitoring: The AS1904A22 is designed to monitor a single voltage rail with a threshold of 2.2V. This precise threshold ensures accurate detection of power supply anomalies.
• Reset Functionality: The device offers an active-low reset output, which is ideal for applications requiring a low signal to initiate a system reset. The reset timeout is a minimum of 60ms, providing ample time for the system to stabilize before the reset is released.
• Surface Mount Packaging: The AS1904A22 is available in a surface mount SOT23-3 package, which is suitable for automated assembly processes and helps in reducing the overall footprint of the design.
• Moisture Sensitivity Level: With an MSL rating of 1 (unlimited), the AS1904A22 is highly resistant to moisture, making it suitable for a wide range of environmental conditions.
• Tape & Reel Packaging: The device is packaged in tape & reel (TR), facilitating efficient handling and placement during the manufacturing process.

AS1904A22 Applications

The AS1904A22 is ideal for a variety of applications where reliable voltage monitoring and system reset functionality are required. Some specific use cases include:

• Embedded Systems: In microcontroller-based systems, the AS1904A22 can ensure proper power-up and power-down sequences, preventing system crashes and data corruption.
• Consumer Electronics: Devices such as smartphones, tablets, and IoT devices can benefit from the compact size and reliable performance of the AS1904A22.
• Industrial Control: In industrial applications, the AS1904A22 can monitor critical power supplies, ensuring system reliability and preventing downtime.
• Automotive Electronics: The AS1904A22's robustness and moisture resistance make it suitable for automotive applications where environmental conditions can be harsh.

Conclusion of AS1904A22

The AS1904A22 is a versatile and reliable voltage supervisor IC that offers precise voltage monitoring and reset functionality in a compact package. Its active-low reset output and 60ms minimum reset timeout make it suitable for a wide range of applications, from embedded systems to industrial control. The surface mount SOT23-3 package and moisture resistance further enhance its appeal for modern electronics designs. Despite being marked as obsolete, the AS1904A22 remains a valuable component for applications requiring a single-channel voltage supervisor with a 2.2V threshold.