UCD9081RHBT

The UCD9081RHBT from Texas Instruments is an 8-channel power supply sequencer and monitor designed for systems requiring precise control over multiple voltage rails. This IC features a nominal supply current of 3 mA and operates within a temperature range of -40°C to 85°C.

Key electrical specifications include the ability to monitor eight voltage rails with a resolution of 3.2 mV and sequence eight outputs. The device supports adjustable or selectable voltage configurations and has a reset timeout of 2µs minimum with an active-low reset signal. Its flexible sequencing capabilities can be based on timelines, parent rail regulation, or defined thresholds.

Packaged in a 32-VQFN (5x5 mm) with an exposed pad, the UCD9081RHBT is designed for surface mount applications. It offers configurable digital outputs for power-on-reset and other functions, with configurable output polarity. The device also includes independent under- and overvoltage thresholds per rail and configurable regulation expiration times.

Applications for the UCD9081RHBT include telecommunications, servers, networking equipment, test equipment, and industrial systems that require the sequencing of multiple voltage rails. It provides flexible alarm processing, logging alarm conditions with timestamps, and on-chip flash for storing user data and error logging for system failure analysis.