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Texas Instruments UCD90124RGCT
- Part No.:
- UCD90124RGCT
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 64-VFQFN Exposed Pad
- Datasheet:
-
UCD90124RGCT.pdf
- Description:
- IC SUPERVISOR 12 CHANNEL 64VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:645
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Product details
Overview
UCD90124RGCT from Texas Instruments is a 12-rail PMBus/I²C-addressable power-supply sequencer and system health monitor with closed-loop margining, fan control, and nonvolatile fault logging. It integrates a 12-bit ADC (0.5% internal VREF), monitors up to 13 analog inputs (voltage/current/temperature), supports 26 GPIOs (12 with PWM), and operates across –40°C to +110°C for server and telecom power management.
For engineers reviewing the UCD90124RGCT datasheet, UCD90124RGCT pinout, UCD90124RGCT application, or UCD90124RGCT equivalent, this device delivers deterministic rail sequencing (time-, rail-, and pin-based), real-time closed-loop margining for 10 rails, four-fan PWM control with tach monitoring, and PMBus 1.1-compliant configuration via TI Fusion GUI - all in a 64-pin QFN package.
Technical Context
The UCD90124RGCT implements a programmable sequencing engine with Boolean logic builder for dependency-driven turn-on/off timing, supporting up to 12 voltage rails with configurable POWER_GOOD_ON/OFF thresholds, TON_DELAY/TOFF_DELAY (up to 3276 ms), and fault-shutdown slave relationships. Its 12-bit ADC samples all 13 monitor inputs every 400 ms with ±0.5% reference accuracy over temperature.
It embeds two fan-control algorithms (speed-vs-temperature setpoints) driving four independent PWM outputs (FPWM1–FPWM4), each supporting 2-/3-/4-wire fans at 25 kHz base frequency and 30–300k RPM tach range. Margining uses dedicated FPWM outputs (FPWM1–FPWM8) operating from 15.259 kHz to 125 MHz to adjust rail voltages dynamically against user-defined thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Rails monitored | 12 voltage rails + 13 analog inputs (MON1–MON13), enabling comprehensive multi-rail health monitoring |
| ADC resolution & accuracy | 12-bit with ±0.5% internal 2.5-V reference, ensuring precise voltage/current/temperature measurement |
| Sequencing flexibility | Time-, rail-, and pin-based dependencies with 3276 ms max delay per rail, supporting complex power-up/down orderings |
| Closed-loop margining | 10 rails supported using dedicated PWM outputs; adjusts output voltage to match user-defined high/low margin thresholds |
| Fan control capability | Four independent fans supported with speed-vs-temperature setpoints, tach monitoring (30–300k RPM), and 25 kHz PWM base |
| Communication interface | PMBus 1.1 / I²C / SMBus compliant (10–400 kHz), with alert, control, and address pins for multi-device bus operation |
| GPIO/PWM resources | 26 GPIOs total; 12 support PWM (FPWM1–FPWM8, PWM1–PWM4), enabling fan control, enable signaling, and general-purpose functions |
| Operating temperature | –40°C to +110°C ambient, validated for industrial and telecom infrastructure environments |
Pinout & Package
UCD90124RGCT is housed in a 64-pin QFN package (RGC) with exposed thermal pad. Pin functions include 13 analog monitor inputs (MON1–MON13), 26 GPIOs (12 PWM-capable), 4 dedicated fan PWM outputs (FPWM1–FPWM4), 4 tach inputs, PMBus interface (CLK/DATA/ALERT/CNTRL), JTAG debug, reset, and segregated analog/digital power/ground domains.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MON1–MON9 | Analog monitor input | 0–2.5 V range; used for rail voltage sensing (e.g., 12V_OUT, 3.3V_UCD, 1.8V_OUT) |
| MON10–MON13 | Analog monitor input | 0.2–2.5 V range; optimized for current-sense amplifier outputs (e.g., INA196 signals) |
| FPWM1–FPWM4 | Fan PWM output | Configurable 25 kHz base frequency; drives external fan MOSFETs or fan controllers |
| PMBUS_CLK / PMBUS_DATA | PMBus interface | Open-drain, 3.3-V tolerant; enables configuration, monitoring, and fault logging via TI Fusion GUI |
| RESET | Active-low reset input | Hold low ≥2 ms to initiate hardware reset; ensures deterministic state recovery after fault or power cycle |
| V33A / V33D / V33DIO1/2 | Power supply inputs | Separate analog (3.3 V ±10%), digital core (3.3 V ±10%), and I/O (3.3 V ±10%) rails for noise isolation |
Key Features
| Feature | Design Value |
|---|---|
| 12-rail sequencing engine | Supports time-, rail-, and pin-triggered dependencies with up to 3276 ms delays per rail for robust multi-supply coordination |
| Closed-loop margining (10 rails) | Uses dedicated FPWM outputs to dynamically adjust rail voltages to match user-defined high/low thresholds for production test coverage |
| Nonvolatile fault logging | Stores up to 10 fault detail entries (timestamp, rail, fault type, voltage/temp values) in on-chip flash for post-failure root-cause analysis |
| Integrated fan control | Two built-in algorithms drive four independent fans with temperature-based speed profiles and tach feedback for thermal management |
| Flexible GPIO configuration | 26 GPIOs assignable as digital I/O, PWM outputs, rail enables, power-on reset signals, or cascading inputs for system-level coordination |
| PMBus 1.1 compliance | Full command set support including MFR_SPECIFIC extensions for sequencer configuration, margining, and health monitoring |
Applications
| Server Power Management | Telecom Line Card Sequencing |
|---|---|
|
Use Scenario: Sequencing and monitoring 12+ voltage rails (e.g., 12 V, 3.3 V, 1.8 V, 0.8 V) powering CPUs, FPGAs, and transceivers in dual-socket servers. IC Role / Device Role / Timing Role: Centralized sequencer enforcing strict power-up order, detecting UV/OV faults, and triggering graceful shutdown on thermal or overcurrent events. Use Value: Prevents latch-up and data corruption by ensuring core voltages stabilize before I/O rails, while logging faults to accelerate field failure analysis. |
Use Scenario: Managing power sequencing and health monitoring for multi-rail line cards in carrier-grade routers with hot-swap capability. IC Role / Device Role / Timing Role: System health monitor coordinating rail enable/disable via PMBUS_CNTRL pin and GPI inputs during insertion/removal sequences. Use Value: Enables safe hot-swap through synchronized sequencing, real-time current monitoring (via INA196), and automatic fault isolation without host CPU intervention. |
| Industrial ATE Power Control | Embedded Computing Platform Monitoring |
|
Use Scenario: Four-corner testing of DUT power supplies under min/max voltage and temperature extremes in automated test equipment. IC Role / Device Role / Timing Role: Closed-loop margining controller adjusting rail outputs to ±3% tolerance using FPWM outputs and feedback from MON pins. Use Value: Achieves accurate, repeatable margining across 10 rails without external DACs or calibration, reducing test setup complexity and cost. |
Use Scenario: Monitoring and sequencing power for heterogeneous SoCs (e.g., ARM + FPGA + DDR) in ruggedized edge computing systems. IC Role / Device Role / Timing Role: Health monitor aggregating voltage, temperature (TEMP0.8V/TEMP12V), and fan tach data to maintain thermal envelope and prevent throttling. Use Value: Extends system lifetime by proactively managing thermal stress via PWM-controlled fans and early overtemperature warning shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-supply sequencing and monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCD90120ARGCT | 12-rail sequencer with identical pinout and PMBus interface but lacks closed-loop margining and fan PWM outputs | Suitable for basic sequencing-only applications without margining or active thermal control requirements | Select UCD90120ARGCT only if fan control and closed-loop margining are unnecessary; UCD90124RGCT provides full feature set in same footprint |
| UCD9090ARGCT | 10-rail sequencer with integrated 10-bit ADC, no fan control, and reduced GPIO count (16 total); supports only 8 margining rails | Targeted at cost-sensitive, lower-complexity systems with ≤10 rails and no tach monitoring needs | Choose UCD9090ARGCT for simpler designs where 12-rail capacity, 12-bit ADC accuracy, and 4-fan support are not required |
Compared with UCD90120ARGCT and UCD9090ARGCT, the UCD90124RGCT uniquely combines 12-rail sequencing, 12-bit precision monitoring, closed-loop margining for 10 rails, and integrated 4-fan PWM control - making it the only option for high-reliability telecom and server platforms requiring full health supervision and production test coverage.
Availability
UCD90124RGCT is available at Aetrix Electronics and suitable for server power management, telecom line card sequencing, industrial ATE, embedded computing platforms, and high-availability infrastructure requiring stable component supply and long-term lifecycle support.
Supply support for UCD90124RGCT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and power management technologies, with leadership in high-reliability industrial and communications ICs.
The UCD90124RGCT belongs to TI's Fusion Digital Power™ sequencer family, designed specifically for intelligent, PMBus-configurable power-supply sequencing, health monitoring, and margining in multi-rail server, telecom, and test equipment systems.
FAQ
What is the primary function of the UCD90124RGCT in a power system?
The UCD90124RGCT serves as a centralized 12-rail power-supply sequencer and system health monitor. It enforces precise turn-on/turn-off timing across multiple voltage rails, monitors voltage, current, and temperature via its 12-bit ADC, performs closed-loop margining on up to 10 rails, controls four fans, and logs faults to nonvolatile memory - all coordinated via PMBus or GPIO signals. The UCD90124RGCT replaces discrete timing circuits and discrete monitoring components with a single configurable IC.
Does the UCD90124RGCT support closed-loop margining, and how many rails can it control?
Yes, the UCD90124RGCT supports closed-loop margining on up to 10 voltage rails using dedicated FPWM outputs (FPWM1–FPWM8). It dynamically adjusts rail output voltages by modulating PWM duty cycle to match user-defined high and low margin thresholds, enabling accurate production-level four-corner testing. This functionality is confirmed in the datasheet's FEATURES section and functional block diagram, and is distinct from open-loop margining found in lower-tier sequencers like the UCD9090ARGCT.
How many analog monitor inputs does the UCD90124RGCT have, and what are their voltage ranges?
The UCD90124RGCT has 13 analog monitor inputs: MON1 through MON9 accept 0–2.5 V, while MON10 through MON13 accept 0.2–2.5 V. These inputs connect to external resistive dividers or current-sense amplifiers (e.g., INA196) to measure rail voltages, currents, or temperatures. The 12-bit ADC samples all 13 inputs every 400 ms with ±0.5% internal reference accuracy, as specified in the Electrical Characteristics table of the SLVSA29B datasheet.
What fan control capabilities does the UCD90124RGCT provide?
The UCD90124RGCT supports four independent fans using FPWM1–FPWM4 outputs, each configurable with five user-defined speed-vs-temperature setpoints. It monitors tachometer signals (TACH) from 2-, 3-, or 4-wire fans, supports 30–300k RPM range, and provides 25 kHz base PWM frequency. Fan behavior is managed by two built-in algorithms accessible via PMBus commands or TI Fusion GUI - eliminating need for external fan controllers. This capability is explicitly documented in the FEATURES and FUNCTIONAL DESCRIPTION sections.
Is the UCD90124RGCT compatible with TI's Fusion Digital Power Designer software?
Yes, the UCD90124RGCT is fully supported by TI's Fusion Digital Power Designer GUI. This PC-based tool provides intuitive configuration of sequencing parameters (delays, dependencies), margining thresholds, fan profiles, fault responses, and monitoring limits - then stores the configuration to the device's on-chip flash memory. The software communicates via I²C/PMBus and is referenced throughout the UCD90124RGCT datasheet as the standard configuration method. No additional firmware or drivers are required beyond the official TI Fusion installer.
UCD90124RGCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 64-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Sequencer
- Number of Voltages Monitored:
- 12
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- -
- Reset:
- Active Low
- Reset Timeout:
- 2µs Minimum
- Operating Temperature:
- -40°C ~ 110°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-VQFN (9x9)
UCD90124RGCT FAQ
1.How can I place an order for UCD90124RGCT through Aetrix?
Please submit a Request for Quotation (RFQ) for UCD90124RGCT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for UCD90124RGCT reliable?
The price and inventory of UCD90124RGCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCD90124RGCT is usually 5 days.
3.What payment methods are accepted for UCD90124RGCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCD90124RGCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCD90124RGCT?
UCD90124RGCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCD90124RGCT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for UCD90124RGCT?
For technical support, including UCD90124RGCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCD90124RGCT requirements.
6.How does Aetrix verify that UCD90124RGCT is sourced from the original manufacturer or authorized distributors?
All UCD90124RGCT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that UCD90124RGCT meets industry standards.
7.What is the process for return or replacement of UCD90124RGCT?
All UCD90124RGCT units undergo pre-shipment inspection (PSI). If there is an issue with UCD90124RGCT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The UCD90124RGCT part is unused and in its original packaging.
Return procedure for UCD90124RGCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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