The UCD9081 power-supply sequencer controls the enable sequence of up to eight independent voltage rails and provides four general-purpose digital outputs (GPO). The device operates from a 3.3-V supply, provides 3.2-mV resolution of voltage rails, and requires no external memory or clock. The UCD9081 monitors the voltage rails independently and has a high degree of rail sequence and alarm response options. The sequencing of rails can be based on timed events or on timed events in conjunction with other rails achieving regulation or a voltage threshold. In addition, each rail is monitored for undervoltage and overvoltage glitches and thresholds. Each rail the UCD9081 monitors can be configured to shut down a user-defined set of other rails and GPOs, and alarm conditions are monitored on a per-rail basis.

• 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
  • Any System Requiring Sequencing of Multiple Voltage Rails

All other trademarks are the property of their respective owners

• Supply voltage (Min) (V)
• 3
• Number of supplies monitored
• 8
• Supply voltage (Max) (V)
• 3.6
• Iq (Typ) (uA)
• 3000
• Time delay (ms)
• Programmable
• Number of sequenced outputs
• 8
• Rating
• Catalog

UCD9081的完整型号有：UCD9081RHBR、UCD9081RHBT，以下是这些产品的关键参数及官网采购报价：

UCD9081RHBR，工作温度：-40 to 85，封装：VQFN (RHB)-32，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网UCD9081RHBR的批量USD价格：2.596（1000+）

UCD9081RHBT，工作温度：-40 to 85，封装：VQFN (RHB)-32，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网UCD9081RHBT的批量USD价格：3.115（1000+）

UCD9081EVM — UCD9081EVM 评估模块

UCD9081EVM 简化了 UCD9081 电源序列发生器和监控器的评估过程。UCD9081EVM 允许用户通过板载接头对 8 个板载电源或外部电源的定序和监控进行配置。

USB-TO-GPIO — USB Interface Adapter EVM

该 EVM 用作主机 PC（兼容 IBM™）与一个或多个从属器件（通过标准 A 型转迷你 B 型 USB 电缆实现）之间的接口适配器或桥接器。USB 接口适配器与主机 PC 之间的通信通过 USB 实现，而 USB 接口适配器与从属器件之间的通信通过内部集成电路 (I²C)、SMBus、PMBus 和/或通用输入/输出 GPIO 实现。桥接器转换 USB 与串行协议之间的通信事务。

UCD9081 EVM GUI exe file (Rev. A)

PSpice for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence 的模拟分析引擎。PSpice for TI 可免费使用，包括业内超大的模型库之一，涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。

借助?PSpice for TI 的设计和仿真环境及其内置的模型库，您可对复杂的混合信号设计进行仿真。创建完整的终端设备设计和原型解决方案，然后再进行布局和制造，可缩短产品上市时间并降低开发成本。

在?PSpice for TI 设计和仿真工具中，您可以搜索 TI (...)