Overview
The UCD9081RHBR is a power-supply sequencer and monitor integrated circuit (IC) manufactured by Texas Instruments. This device is designed to control the enable sequence of up to eight independent voltage rails, making it an essential component in systems that require precise power management. The UCD9081RHBR operates from a single 3.3-V supply and features low power consumption, with a nominal supply current of 3 mA. It is packaged in a 32-VQFN (5x5) exposed pad, suitable for surface mount applications, and operates over a temperature range of -40°C to 85°C.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | UCD9081RHBR |
| Category | Integrated Circuits (ICs) - PMIC - Supervisors |
| Package | 32-VFQFN Exposed Pad |
| Number of Voltages Monitored | 8 |
| Reset | Active Low |
| Reset Timeout | 2 µs Minimum |
| Voltage - Threshold | Adjustable/Selectable |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
| Supply Voltage | 3.3 V |
| Supply Current | 3 mA Nominal |
Key Features
- Sequences and monitors up to eight independent voltage rails with 3.2-mV resolution.
- Internal or external voltage reference.
- Four configurable digital outputs (GPOs) for power-on-reset and other functions.
- Configurable digital output polarity.
- Flexible rail sequencing based on timeline, 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 and error logging 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 UCD9081RHBR?
The UCD9081RHBR 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 (GPOs)).
- What is the operating supply voltage of the UCD9081RHBR?
The UCD9081RHBR operates from a single 3.3-V supply).
- What is the resolution of voltage rail monitoring?
The device monitors voltage rails with a resolution of 3.2 mV).
- Can the UCD9081RHBR log error conditions?
- What communication interface does the UCD9081RHBR use?
The UCD9081RHBR uses an I2C interface for configuration and monitoring).
- What is the operating temperature range of the UCD9081RHBR?
The device operates over a temperature range of -40°C to 85°C).
- What types of systems typically use the UCD9081RHBR?
The UCD9081RHBR is used in telecommunications switches, servers, networking equipment, test equipment, and industrial systems, among others).
- How many digital outputs does the UCD9081RHBR provide?
The UCD9081RHBR provides four general-purpose digital outputs (GPOs)).
- Can the sequencing of voltage rails be customized?
- Does the UCD9081RHBR have on-chip flash memory?
