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Analog Devices Inc. LTC2964HUDC#TRPBF
- Part No.:
- LTC2964HUDC#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
LTC2964HUDC#TRPBF.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,027
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Product details
Overview
LTC2964HUDC#TRPBF from Analog Devices is a quad configurable voltage supervisor IC with individual open-drain comparator outputs (OUT1–OUT4), ±0.5% threshold accuracy over –40°C to 125°C, 20-lead 3mm × 4mm QFN package, and support for +ADJ/–ADJ modes enabling undervoltage, overvoltage, and negative voltage monitoring in high-reliability power systems.
For engineers reviewing the LTC2964HUDC#TRPBF datasheet, LTC2964HUDC#TRPBF pinout, LTC2964HUDC#TRPBF application, or LTC2964HUDC#TRPBF equivalent, this page delivers verified specifications, H-grade thermal performance, real-time per-channel status signaling, and design-critical timing behavior for automotive control, telecom, and industrial embedded systems.
Technical Context
The LTC2964HUDC#TRPBF implements four independent rail monitors using a buffered 1.195V reference and 4-bit ADC-based threshold selection via PG1–PG4 inputs. Each channel supports 16 programmable thresholds-including preset –4% and –6% offsets for 5V/3.3V/2.5V/1.8V/1.5V/1.2V/1.0V rails-and ±ADJ mode with 497.5mV to 502.5mV threshold for custom positive/negative supply monitoring.
Unlike LTC2962/LTC2963, the LTC2964HUDC#TRPBF omits watchdog functionality and instead provides immediate, unfiltered comparator outputs (OUT1–OUT4) with 6µA internal pull-up to VCC and <300mV VOL at 5mA sink current-enabling direct integration into power-good sequencing, fault isolation, and margining circuits without reset timeout delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.25V to 5.5V - powers all circuitry including comparators, reference, and outputs; guarantees RST/OUTn operation down to 1V during brownout. |
| Threshold Accuracy | ±0.5% over –40°C to 125°C - enables tight system voltage margining; e.g., 1.0V rail monitored at 0.96V nominal with guaranteed 0.955V–0.965V trip window. |
| OUTn Output Type | Open-drain with 6µA internal pull-up to VCC - allows level-shifting to external logic supplies; VOL ≤300mV at 5mA sink ensures reliable low-level detection. |
| Input Bias Current | ±15nA in ±ADJ mode; 0.8–1.6MΩ input resistance otherwise - minimizes divider error and enables high-impedance sensing without loading sensitive rails. |
| Propagation Delay | 20–40µs (tUV) - fast response to supply faults; critical for protecting processors and FPGAs during transient droop events. |
| Reset Timeout | Configurable 12ms/nF via CRT capacitor or fixed 200ms internal timer - decouples fault detection from reset assertion timing for flexible system recovery. |
| Operating Temp | –40°C to 125°C (H-grade) - qualified for under-hood automotive, base station power management, and industrial control environments. |
Pinout & Package
20-lead 3mm × 4mm plastic QFN (UDC package) with exposed pad (Pin 21, optional GND connection). Pin count, layout, and thermal metrics (θJA = 52°C/W, θJC = 6.8°C/W) are identical across LTC2963/LTC2964 UDC variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RDIS | Reset Disable Input | Logic-low disables RST assertion during voltage margining; internal 10µA pull-up enables open-circuit default operation. |
| MR | Manual Reset Input | Active-low pushbutton or logic interface; internal pull-up and debounce allow direct mechanical switch connection. |
| DVCC | Digital Logic Supply | Grounded → RST/OUTn open-drain; >1.6V → push-pull output swing to DVCC; bypass with ≥0.1µF capacitor required. |
| VCC | Main Power Supply | Powers core circuitry; RST/OUTn weakly pulled up to VCC; bypass with ≥0.1µF capacitor mandatory. |
| RST | Reset Output | Open-drain output asserted low when any Vn falls below threshold; held low for tRST after all rails recover. |
| GND | Device Ground | Reference for all analog and digital signals; exposed pad (Pin 21) may be connected to PCB ground for improved thermal performance. |
| REF | Buffered Reference | 1.195V ±12mV output; drives PG resistor dividers; supports ±1mA load and ≤1000pF capacitive load without oscillation. |
| PG1–PG4 | Threshold Select Inputs | Accept ratiometric voltage from REF–GND divider; 4-bit ADC selects one of 16 thresholds per channel. |
| V1–V4 | Monitor Inputs | High-impedance inputs accepting 0V to 6V; support +ADJ (0.5V reference) and –ADJ (overvoltage/negative rail) modes. |
| RT | Reset Timeout Capacitor | Connect CRT to GND for 12ms/nF adjustable timeout; tie to VCC for fixed 200ms internal timer. |
| OUT1–OUT4 | Individual Comparator Outputs | Real-time open-drain status per channel; released when Vn > VRTX, pulled low when Vn < VRTX (except –ADJ mode). |
Key Features
| Feature | Design Value |
|---|---|
| Per-channel real-time status | OUT1–OUT4 provide immediate, unfiltered comparator outputs-no reset timeout delay-enabling precise power sequencing and fault localization. |
| ±0.5% threshold accuracy | Guaranteed over full –40°C to 125°C range reduces system voltage margin requirements, allowing smaller bulk capacitors and relaxed PSU tolerances. |
| Flexible threshold programming | 16 selectable thresholds per channel via 1% resistors on PG1–PG4; includes –4%/–6% presets for standard rails and ±ADJ for custom monitoring. |
| H-grade temperature range | Rated for –40°C to 125°C operation with validated θJA/θJC thermal metrics-suitable for automotive engine control units and telecom base stations. |
| Low quiescent current | 80–210µA VCC supply current across temperature-minimizes standby power impact in always-on monitoring applications. |
Applications
| Power Sequencing in Multi-Rail FPGA Systems | Automotive ADAS Domain Controller Monitoring |
|---|---|
Use Scenario: Coordinating startup/shutdown order of 1.0V core, 1.8V I/O, 3.3V peripheral, and 5V analog rails in Xilinx Kintex Ultrascale+ FPGA platforms. IC Role / Device Role / Timing Role: LTC2964HUDC#TRPBF provides independent OUT1–OUT4 signals indicating rail readiness; RST asserts only after all rails stabilize per configured tRST. Use Value: Eliminates need for discrete power-good OR-ing; enables deterministic sequencing without microcontroller intervention or external logic. |
Use Scenario: Continuous monitoring of 12V battery backup, 5V MCU supply, 3.3V sensor interface, and –5V camera bias rail in Level 3 autonomous driving ECUs. IC Role / Device Role / Timing Role: LTC2964HUDC#TRPBF uses –ADJ mode on V4 to supervise negative rail; OUTn outputs feed fault interrupt lines to safety MCU for ASIL-B compliance. Use Value: ±0.5% accuracy ensures early detection of marginal 12V battery sag before functional failure; H-grade rating sustains operation at 125°C ambient. |
| Industrial PLC Power Good Signaling | 5G Radio Unit DC/DC Converter Health Check |
Use Scenario: Verifying stable operation of isolated 24V, 12V, 5V, and 3.3V DC/DC converters powering CPU, I/O, communication, and analog modules in modular PLC backplanes. IC Role / Device Role / Timing Role: LTC2964HUDC#TRPBF's OUT1–OUT4 drive optocouplers feeding PLC controller; RST triggers hard reset if any converter fails. Use Value: Individual outputs enable granular diagnostics-e.g., isolate faulty 5V converter without disabling entire system-reducing MTTR. |
Use Scenario: Monitoring output rails of GaN-based 48V-to-12V, 12V-to-5V, 5V-to-3.3V, and 5V-to-1.8V converters in massive MIMO active antenna units. IC Role / Device Role / Timing Role: LTC2964HUDC#TRPBF supervises each converter output with –4% thresholds; OUTn signals feed FPGA health monitor for predictive maintenance. Use Value: 20-lead QFN footprint fits dense RF board layouts; 20µs propagation delay detects nanosecond-scale transients from GaN switching noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6314US29D3+T | Fixed 2.93V single-supply monitor; no programmability, no multi-rail support, no individual outputs. | Only suitable for single-rail systems; lacks per-channel status, adjustable thresholds, and H-grade temp range. | Select only for cost-sensitive, single-voltage applications where flexibility and accuracy are secondary. |
| TPS3808G33DBVR | Single-channel 3.3V supervisor with 200ms fixed timeout; no PG programming, no OUTn equivalents, rated only to 85°C. | Requires four separate ICs to match LTC2964HUDC#TRPBF's quad capability; unsuitable for automotive or extended-temp industrial use. | Consider only for low-complexity, non-automotive designs with limited BOM count constraints. |
Compared with MAX6314US29D3+T and TPS3808G33DBVR, the LTC2964HUDC#TRPBF delivers integrated quad monitoring, ±0.5% accuracy across –40°C to 125°C, and real-time per-rail status-reducing component count by 75%, enabling tighter voltage margins, and supporting ASIL-B and industrial safety certifications.
Availability
LTC2964HUDC#TRPBF is available at Aetrix Electronics and suitable for automotive control systems, 5G radio unit power management, and industrial PLCs requiring stable component supply with guaranteed long-term availability and H-grade thermal qualification.
Supply support for LTC2964HUDC#TRPBF 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
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and industrial markets since 1965.
The LTC2964HUDC#TRPBF belongs to the LTC2962 family of configurable supervisors-designed specifically for high-reliability, multi-rail power monitoring in automotive, telecom, and industrial systems demanding ±0.5% accuracy and extended temperature operation.
FAQ
What is the primary function of the LTC2964HUDC#TRPBF?
The LTC2964HUDC#TRPBF is a quad configurable voltage supervisor IC that independently monitors up to four power supply rails with ±0.5% threshold accuracy. It provides real-time open-drain comparator outputs (OUT1–OUT4) for each rail and a shared reset output (RST) with programmable timeout-enabling precise power sequencing, fault isolation, and system-level reliability in harsh environments.
How does the LTC2964HUDC#TRPBF differ from the LTC2963?
The LTC2964HUDC#TRPBF replaces the watchdog timer (WDI/WDO/WDS/WT) and associated pins found in the LTC2963 with individual comparator outputs (OUT1–OUT4). It lacks watchdog functionality but delivers immediate, unfiltered per-rail status-making it ideal for sequencing and diagnostic applications where reset delay is undesirable. Both share identical pinout, package, and threshold programming architecture.
What is the role of the REF pin on the LTC2964HUDC#TRPBF?
The REF pin on the LTC2964HUDC#TRPBF provides a buffered 1.195V ±12mV reference used to set threshold voltages via external 1% resistor dividers connected to PG1–PG4. It can source/sink up to ±1mA and drive up to 1000pF capacitance, ensuring stable threshold selection across temperature and load conditions without external regulation.
Can the LTC2964HUDC#TRPBF monitor negative voltages?
Yes-the LTC2964HUDC#TRPBF supports –ADJ mode on any Vn input, comparing the rail to a 0.5V internal reference. When a negative supply (e.g., –5V) is applied through an external resistor divider that scales its magnitude to 0.5V at the Vn pin, the device detects undervoltage as the negative rail becomes *less negative*, enabling robust supervision of bipolar power systems.
What is the minimum VCC voltage required for reliable operation of the LTC2964HUDC#TRPBF?
The LTC2964HUDC#TRPBF guarantees correct RST output state down to VCC = 1V during power-up, brownout, or shutdown. Its specified operating range is 2.25V to 5.5V, and minimum configuration voltage (VCCMINC) is 2.2V-ensuring functional initialization and stable comparator operation across wide input transients common in automotive and industrial power domains.
LTC2964HUDC#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Open-Drain or Push-Pull
- Reset:
- Active Low
- Reset Timeout:
- 160ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (3x4)
LTC2964HUDC#TRPBF FAQ
1.How can I place an order for LTC2964HUDC#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2964HUDC#TRPBF 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 LTC2964HUDC#TRPBF reliable?
The price and inventory of LTC2964HUDC#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2964HUDC#TRPBF is usually 5 days.
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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2964HUDC#TRPBF transactions.
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LTC2964HUDC#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2964HUDC#TRPBF 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 LTC2964HUDC#TRPBF?
For technical support, including LTC2964HUDC#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2964HUDC#TRPBF requirements.
6.How does Aetrix verify that LTC2964HUDC#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2964HUDC#TRPBF 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 LTC2964HUDC#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2964HUDC#TRPBF?
All LTC2964HUDC#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2964HUDC#TRPBF, 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 LTC2964HUDC#TRPBF part is unused and in its original packaging.
Return procedure for LTC2964HUDC#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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