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UCD9081RHBRTI/BBN/a30avaiPower Supply Sequencer and Monitor with Non-Volatile Error Logging 32-VQFN -40 to 85
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UCD9081RHBR-UCD9081RHBRG4-UCD9081RHBT
Power Supply Sequencer and Monitor with Non-Volatile Error Logging 32-VQFN -40 to 85
MON1
MON2
MON3
MON4
MON5
MON6
MON7
MON8
Oscillator
Power
Enables
EN1
EN2
EN3
EN4
EN5
EN6
EN7
EN8/GPO1General-
Purpose
Outputs
GPO2
GPO3
GPO4
Memory
Analog
Inputs Sequencing
Engine

UCD9081
EN[1:7]
SCL
VCC
MON[1:8]
ROSC
RST
XIN
TEST
10 kW
100 kW
10 kW
10 kW
3.3V
3.3V 3.3V
3.3V
3.3V
0.01FmFm
Slave IC
Master Device
Digital
Outputs
EN8/
ADDR1/
GPO1
Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community Features Single Supply Voltage: 3.3V Low Power Consumption: 3-mA Nominal Supply
Current Sequences and Monitors Eight Voltage Rails Rail Voltages Sampled With 3.2-mV Resolution Internalor External Voltage Reference Four Configurable Digital Outputs for Power-On-
Reset and Other Functions Configurable Digital Output Polarity Flexible Rail Sequencing Basedon 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,
Retryn 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 Loggingto Flash for System Failure AnalysisI2 C™ Interface for Configuration and Monitoring Microsoft Windows™ GUI for Configuration and
Monitoring
Functional Block Diagram Applications
Telecommunications Switches Servers Networking Equipment Test Equipment Industrial Any System Requiring Sequencingof Multiple
Voltage Rails Description
The UCD9081 power-supply sequencer controls the
enable sequenceof upto eight independent voltage
rails and provides four general-purpose digital outputs
(GPO). The device operates froma 3.3-V supply,
provides 3.2-mV resolution of voltage rails, and
requiresno external memoryor clock. The UCD9081
monitors the voltage rails independently and hasa
high degreeof rail sequence and alarm response
options. The sequencingof rails can be based on
timed eventsor on timed eventsin conjunction with
other rails achieving regulationora voltage threshold. addition, each railis monitored for undervoltage
and overvoltage glitches and thresholds. Each rail the
UCD9081 monitors can be configuredto shut down
user-defined setof other rails and GPOs, and alarm
conditions are monitored ona per-rail basis.
the endofthe data sheet.
Typical Application Diagram
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