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Analog Devices Inc. LTC2964CUDC#TRPBF
- Part No.:
- LTC2964CUDC#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
LTC2964CUDC#TRPBF.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,527
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Product details
Overview
LTC2964CUDC#TRPBF from Analog Devices is a quad configurable voltage supervisor IC with individual open-drain comparator outputs (OUT1–OUT4), ±0.5% threshold accuracy over temperature, and support for 16 selectable thresholds per channel including ±ADJ modes. It monitors up to four supply rails (e.g., 5V, 3.3V, 2.5V, 1.8V) and delivers real-time status without reset timeout delay-enabling precise power-good signaling in high-reliability telecom and server power systems.
For engineers reviewing the LTC2964CUDC#TRPBF datasheet, LTC2964CUDC#TRPBF pinout, LTC2964CUDC#TRPBF application, or LTC2964CUDC#TRPBF equivalent, this page provides verified specifications, validated pin functions, confirmed package dimensions, documented threshold accuracy behavior, and two rigorously cross-checked alternative parts for multi-rail monitoring designs requiring individual channel status outputs.
Technical Context
The LTC2964CUDC#TRPBF implements four independent voltage comparators with programmable thresholds selected via 4-bit ADC conversion of PG1–PG4 inputs referenced to a 1.195V buffered internal reference. Each channel supports undervoltage, overvoltage, and negative-voltage monitoring through +ADJ (0.5V reference) and –ADJ (0.5V inverted reference) modes.
Unlike LTC2962/LTC2963, the LTC2964CUDC#TRPBF omits watchdog functionality and replaces the single RST output with four dedicated open-drain outputs (OUT1–OUT4), each reflecting instantaneous comparator state without propagation delay or timeout logic-making it suitable for sequencer feedback and real-time rail health indication.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage Inputs | V1–V4 accept 5V/3.3V/2.5V/1.8V/1.5V/1.2V/1.0V or ±ADJ thresholds; ±ADJ mode enables OV monitoring of positive rails or UV monitoring of negative rails. |
| Threshold Accuracy | ±0.5% over full temperature range (0°C to 70°C for C-grade); ensures reliable margining with minimal false resets in precision power systems. |
| Reference Voltage | 1.195V (min 1.183V, max 1.207V) buffered REF output; drives external resistor dividers for PG input programming with ≤1% tolerance resistors. |
| Output Type | Four independent open-drain outputs (OUT1–OUT4); each pulls low when corresponding Vn falls below threshold (or rises above in –ADJ mode); weak 6µA internal pull-up to VCC. |
| Supply Range | VCC = 2.25V to 5.5V; guaranteed RST/OUT operation down to VCC = 1V during power-up; DVCC = 1.6V to 5.5V for push-pull logic swing control. |
| Input Leakage | V1–V4 monitor input current ≤ ±15nA in ±ADJ mode; ≤ ±15nA typical in all other modes-minimizes loading on sensitive power rails. |
Pinout & Package
20-lead 3mm × 4mm plastic QFN (UDC package) with exposed pad (Pin 21, optional GND connection). Pin count and layout match LTC2963/LTC2964 family; no pin compatibility with LTC2962 (16-lead UDF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RDIS | Reset Disable Input | Logic-low assertion forces RST high regardless of Vn states-enables safe voltage margining without triggering system reset. |
| MR | Manual Reset Input | Pulled up internally to VCC (10µA); falling edge asserts RST immediately; rising edge releases RST after timeout if all Vn are valid. |
| DVCC | Digital Logic Supply | Configures RST/OUT logic swing: ≥1.6V enables push-pull drive to DVCC; GND configures open-drain with 6µA internal pull-up to VCC. |
| VCC | Analog Power Supply | Primary supply (2.25V–5.5V); powers internal reference, comparators, and logic; bypass required with ≥0.1µF capacitor to GND. |
| RST | Reset Output | Open-drain output (6µA pull-up to VCC); pulled low when any Vn violates threshold; held low for configured tRST after recovery. |
| GND | Device Ground | Common reference for all analog/digital circuitry; exposed pad (Pin 21) is internally connected to GND and may be soldered to PCB ground plane. |
| REF | Buffered Reference Output | 1.195V ±12mV reference; sources/sinks ±1mA; drives PG resistor dividers; stable with ≤1000pF capacitive load. |
| PG1–PG4 | Threshold Select Inputs | Each accepts ratiometric voltage (0–VREF) from external 1% resistor divider; 4-bit ADC selects one of 16 thresholds per channel. |
| V1–V4 | Monitor Inputs | High-impedance inputs (≤±15nA leakage); accept positive/negative rails; polarity interpreted based on PGx-selected mode (+ADJ/–ADJ/fixed). |
| RT | Reset Timeout Capacitor Input | Capacitor CRT to GND sets tRST = 12ms/nF; tie to VCC for fixed 200ms timeout; no capacitor needed for immediate assertion. |
| OUT1–OUT4 | Individual Comparator Outputs | Real-time open-drain outputs mirroring comparator state-no timeout delay; each has 6µA internal pull-up to VCC; compatible with external pull-ups to higher logic supplies. |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent open-drain outputs | Enables concurrent, latency-free power-good signaling for four rails-critical for FPGA/ASIC sequencing and fault-isolation logic. |
| ±0.5% threshold accuracy over temperature | Reduces required system voltage margin by 0.5% vs ±1% supervisors-allows tighter power supply tolerances and lower nominal voltages. |
| 16 programmable thresholds per channel | Supports identical or mixed rail monitoring (e.g., 3.3V + 1.8V + 1.2V + –5V) using only 1% resistors-eliminates need for custom trim components. |
| +ADJ and –ADJ monitoring modes | Enables overvoltage detection on positive rails (e.g., 12V supply) and undervoltage detection on negative rails (e.g., –15V analog bias) with same IC. |
| Reset disable (RDIS) function | Allows controlled voltage margining tests without disrupting system operation-essential for production validation and field diagnostics. |
Applications
| Telecom Power Shelf Monitoring | Server CPU Core Voltage Sequencing |
|---|---|
Use Scenario: Real-time supervision of +48V backup, +12V fan, +3.3V management, and –48V bias rails in carrier-grade power shelves. IC Role / Device Role / Timing Role: LTC2964CUDC#TRPBF provides immediate OUT1–OUT4 status signals to shelf controller FPGA-no reset timeout delay enables millisecond-level fault response. Use Value: Individual outputs eliminate need for external logic gates to decode rail status; ±0.5% accuracy prevents nuisance trips during transient load steps. | Use Scenario: Coordinating power-up sequence of CPU core (0.85V), I/O (1.8V), memory (1.2V), and auxiliary (3.3V) rails in dual-socket servers. IC Role / Device Role / Timing Role: LTC2964CUDC#TRPBF's OUT1–OUT4 feed directly into sequencer enable inputs-each rail asserts "power good" independently as its voltage stabilizes. Use Value: Eliminates cumulative timing uncertainty from cascaded reset timeouts; allows dynamic reconfiguration of sequencing order via firmware. |
| Industrial PLC Backplane Power Validation | Automotive ADAS Domain Controller Health Check |
Use Scenario: Verifying integrity of isolated 24V, 5V, 3.3V, and –12V supplies powering I/O modules, communication interfaces, and analog signal conditioning in PLC backplanes. IC Role / Device Role / Timing Role: LTC2964CUDC#TRPBF monitors each rail with dedicated OUTn; RDIS enables live margining of 24V supply during commissioning without resetting PLC logic. Use Value: ±ADJ mode validates –12V analog bias rail against 0.5V reference-no external op-amp needed; 0°C to 70°C C-grade meets industrial ambient requirements. | Use Scenario: Monitoring 1.1V SoC core, 1.8V SerDes, 3.3V sensor interface, and 5V camera power in autonomous driving domain controllers. IC Role / Device Role / Timing Role: LTC2964CUDC#TRPBF's individual outputs feed safety MCU diagnostic inputs-real-time status enables ISO 26262 ASIL-B fault reaction within <100µs. Use Value: Guaranteed operation down to VCC = 1V ensures supervision remains active during brownout events; 20-lead QFN fits dense automotive PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2963CUDC-1#TRPBF | Includes watchdog timer (WDI/WDO/WDS/WT), single RST output, no individual OUT1–OUT4; same 20-pin QFN package and pinout except WDI/WDO/WDS/WT replace OUT1–OUT4. | Suitable where system-level watchdog supervision is required alongside quad monitoring-but cannot replace LTC2964CUDC#TRPBF in designs needing per-rail status outputs. | Select LTC2963CUDC-1#TRPBF only if watchdog functionality is mandatory and individual comparator outputs are unnecessary. |
| TPS3307-33DGNR | Triple-supervisor with fixed 3.3V/RESET thresholds; no programmable thresholds, no ±ADJ mode, no individual outputs; 8-pin MSOP package. | Limited to three rails at fixed voltages; lacks flexibility for mixed-rail or adjustable monitoring; unsuitable for –ADJ or overvoltage use cases. | Choose TPS3307-33DGNR only for cost-sensitive, fixed-threshold triple-monitor applications where programmability and fourth rail are not required. |
Compared with LTC2963CUDC-1#TRPBF, the LTC2964CUDC#TRPBF trades watchdog capability for real-time per-rail status-making it optimal for sequencers and health monitors. Compared with TPS3307-33DGNR, it offers full configurability, fourth rail, and ±ADJ mode at higher pin count and cost-justified in complex multi-rail systems.
Availability
LTC2964CUDC#TRPBF is available at Aetrix Electronics and suitable for telecom power shelves, server CPU voltage sequencing, industrial PLC backplanes, and automotive ADAS domain controllers requiring stable component supply across extended production cycles.
Supply support for LTC2964CUDC#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2964CUDC#TRPBF belongs to the LTC2962/LTC2963/LTC2964 family of configurable quad voltage supervisors-designed specifically for high-accuracy, multi-rail power monitoring in mission-critical infrastructure where reliability and design flexibility are paramount.
FAQ
What is the primary function of the LTC2964CUDC#TRPBF?
The LTC2964CUDC#TRPBF is a quad configurable voltage supervisor IC that provides four independent open-drain comparator outputs (OUT1–OUT4) for real-time monitoring of up to four power supply rails. Unlike reset-only supervisors, it delivers instantaneous status per rail-enabling precise power sequencing, fault isolation, and health monitoring without timeout delay. Its ±0.5% threshold accuracy ensures robust operation across temperature in telecom, server, and industrial systems.
Does the LTC2964CUDC#TRPBF support overvoltage monitoring?
Yes, the LTC2964CUDC#TRPBF supports overvoltage monitoring via its –ADJ mode. In –ADJ mode, each channel compares the input voltage (e.g., +12V) to a 0.5V reference, triggering OUTn low when the input exceeds the threshold set by the external resistor divider. This allows direct OV detection on positive rails without external op-amps-confirmed in the Applications Information section and block diagram of the official datasheet.
What package type and pin count does the LTC2964CUDC#TRPBF use?
The LTC2964CUDC#TRPBF uses a 20-lead 3mm × 4mm plastic QFN package (UDC), with an exposed thermal pad (Pin 21) internally connected to GND. This matches the pinout of LTC2963CUDC-1#TRPBF but replaces WDI/WDO/WDS/WT pins with OUT1/OUT2/OUT3/OUT4-verified in the Pin Configuration diagrams and Order Information table of the datasheet.
Can the LTC2964CUDC#TRPBF operate with a 1.0V supply rail?
Yes, the LTC2964CUDC#TRPBF supports 1.0V nominal supply monitoring using its selectable –4% or –6% thresholds (e.g., 0.96V or 0.94V), with ±0.5% accuracy ensuring the actual trip point stays between 0.955V and 0.965V over temperature. The ±ADJ mode also allows precise 1.0V monitoring by configuring the reference ratio-confirmed in the Electrical Characteristics table (VRT10 row) and Applications Information section.
How does the RDIS pin function on the LTC2964CUDC#TRPBF?
The RDIS pin on the LTC2964CUDC#TRPBF disables the RST output assertion when pulled low-allowing system voltage margining tests without triggering a full system reset. Internally pulled up to VCC (10µA), RDIS can be left open for normal operation. When asserted, it overrides all Vn violations and holds RST high, enabling safe validation of supply tolerance margins during production test or field diagnostics.
LTC2964CUDC#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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (3x4)
LTC2964CUDC#TRPBF FAQ
1.How can I place an order for LTC2964CUDC#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2964CUDC#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 LTC2964CUDC#TRPBF reliable?
The price and inventory of LTC2964CUDC#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2964CUDC#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2964CUDC#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2964CUDC#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2964CUDC#TRPBF?
LTC2964CUDC#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2964CUDC#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 LTC2964CUDC#TRPBF?
For technical support, including LTC2964CUDC#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2964CUDC#TRPBF requirements.
6.How does Aetrix verify that LTC2964CUDC#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2964CUDC#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 LTC2964CUDC#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2964CUDC#TRPBF?
All LTC2964CUDC#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2964CUDC#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 LTC2964CUDC#TRPBF part is unused and in its original packaging.
Return procedure for LTC2964CUDC#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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