Overview
The UCD9081RHBT, produced by Texas Instruments, is a power-supply sequencer and monitor designed to control the enable sequence of up to eight independent voltage rails. It also provides four general-purpose digital outputs (GPO). This device operates from a single 3.3-V supply and does not require external memory or a clock. It is highly versatile, offering flexible rail sequencing options based on timed events, parent rail regulation, or specific voltage thresholds. The UCD9081RHBT is ideal for systems that require precise and reliable voltage rail sequencing and monitoring.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | 32-VQFN (RHB) |
| Operating Temperature Range | -40°C to 85°C |
| Supply Voltage | 3.3 V |
| Nominal Supply Current | 3 mA |
| Voltage Rail Resolution | 3.2 mV |
| Number of Voltage Rails | Up to 8 |
| General-Purpose Digital Outputs (GPO) | 4 |
Key Features
- Single Supply Voltage: 3.3 V
- Low Power Consumption: 3-mA Nominal Supply Current
- Sequences and Monitors Eight Voltage Rails
- Rail Voltages Sampled With 3.2-mV Resolution
- Internal or External Voltage Reference
- Four Configurable Digital Outputs for Power-On-Reset and Other Functions
- Configurable Digital Output Polarity
- Flexible Rail Sequencing Based on Timeline (ms), Parent Rail Regulation Window, or Parent Rail Achieving Defined Threshold
- Independent Under- and Overvoltage Thresholds Per Rail
- Configurable Regulation Expiration Times Per Rail
- Flexible Alarm Processing: Ignore, Log Only, Retry n Times, Retry Continuously, Sequence, Parent Rail Can Shutdown Child Rails
- Alarm Conditions Logged With Timestamp: Under- and Overvoltage Glitch, Sustained Under- and Overvoltage, Rail Did Not Start
- On-Chip Flash for Storing User Data
- Error Logging to Flash for System Failure Analysis
- I2C Interface for Configuration and Monitoring
- Microsoft Windows GUI for Configuration and Monitoring
Applications
- Telecommunications Switches
- Servers
- Networking Equipment
- Test Equipment
- Industrial Systems
- Any System Requiring Sequencing of Multiple Voltage Rails
Q & A
- What is the primary function of the UCD9081RHBT?
The UCD9081RHBT is a power-supply sequencer and monitor that controls the enable sequence of up to eight independent voltage rails and provides four general-purpose digital outputs (GPO).
- What is the operating supply voltage of the UCD9081RHBT?
The device operates from a single 3.3-V supply.
- What is the resolution of voltage rail sampling for the UCD9081RHBT?
The voltage rails are sampled with a 3.2-mV resolution.
- How many general-purpose digital outputs (GPO) does the UCD9081RHBT provide?
The device provides four configurable GPOs.
- What are the flexible rail sequencing options available for the UCD9081RHBT?
The sequencing can be based on timed events, parent rail regulation window, or parent rail achieving a defined threshold.
- How does the UCD9081RHBT handle alarm conditions?
Alarm conditions can be configured to ignore, log only, retry n times, retry continuously, sequence, or shut down child rails. Alarm conditions are logged with timestamps.
- Does the UCD9081RHBT require external memory or a clock?
No, the device does not require external memory or a clock.
- What interface does the UCD9081RHBT use for configuration and monitoring?
The device uses an I2C interface for configuration and monitoring.
- Is there a GUI available for configuring and monitoring the UCD9081RHBT?
- What are some common applications for the UCD9081RHBT?
