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Analog Devices Inc. LTC2914IDHC-2#TRPBF
- Part No.:
- LTC2914IDHC-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC2914IDHC-2#TRPBF.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,717
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Product details
Overview
LTC2914IDHC-2#TRPBF from Analog Devices (formerly Linear Technology) is a quad-input, adjustable UV/OV supply monitor IC for simultaneous monitoring of four independent voltage rails in power management systems. It supports ±1.5% threshold accuracy over temperature, 62µA quiescent current, and dual-polarity monitoring (positive/negative supplies) via three-state SEL pin. Used in desktop/notebook computers and network servers for core/I/O rail supervision.
For engineers reviewing the LTC2914IDHC-2#TRPBF datasheet, LTC2914IDHC-2#TRPBF pinout, LTC2914IDHC-2#TRPBF application, or LTC2914IDHC-2#TRPBF equivalent, key selection factors include its -40°C to 85°C industrial temperature grade, DFN-16 (5mm × 3mm) package, adjustable reset timeout with disable capability, and buffered 1V reference for negative-rail monitoring.
Technical Context
The LTC2914IDHC-2#TRPBF implements four independent comparator pairs (VHn/VLn), each configurable for positive or negative supply monitoring via the three-state SEL pin. Thresholds are referenced to an internal 0.5V comparator input, scaled by external resistor dividers, with guaranteed ±1.5% accuracy across –40°C to 85°C.
It features open-drain UV and OV outputs with weak internal pull-ups to VCC and strong pull-downs, adjustable timeout via external TMR capacitor (6–14ms typical), and DIS pin functionality that disables both outputs when pulled high-distinguishing it from the latching LTC2914-1 variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | VCC = 2.3V to 6V; operates as shunt regulator above 6V with series resistor |
| Threshold Accuracy | ±1.5% over full –40°C to 85°C range - ensures reliable trip point stability without recalibration |
| Quiescent Current | 62µA typical - enables micropower operation in always-on supervisory circuits |
| Reference Output | 1.000V ±15mV buffered REF - drives ≤1mA load; used for offset in negative-voltage monitoring |
| UV/OV Timeout Range | 6ms to 14ms (–40°C to 85°C) with 1nF CTMR - sets minimum reset pulse width after fault clearance |
| Input Voltage Range | VHn/VLn: –0.3V to 7.5V - supports direct connection to negative rails when configured with SEL |
| Output Type | Open-drain UV/OV with weak VCC pull-up and strong ground pull-down - enables wired-OR and flexible logic interfacing |
Pinout & Package
Package: 16-lead plastic DFN (5mm × 3mm), exposed pad (Pin 17), RoHS-compliant, industrial temperature grade (–40°C to 85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VH1–VH4 (Pins 1,3,5,7) | High-side voltage inputs | Trigger UV if below 0.5V (positive mode) or OV if below 0.5V (negative mode, per SEL) |
| VL1–VL4 (Pins 2,4,6,8) | Low-side voltage inputs | Trigger OV if above 0.5V (positive mode) or UV if above 0.5V (negative mode, per SEL) |
| VCC (Pin 16) | Supply input / shunt regulator | Operates directly up to 6V; >6V requires current-limiting resistor to stay within 10mA max terminal current |
| GND (Pin 9) | Device ground reference | Return path for all internal circuitry; exposed pad may be connected to PCB GND |
| UV (Pin 12), OV (Pin 11) | Open-drain logic outputs | Assert low on fault; weakly pulled up to VCC; DIS pin disables both outputs when high |
| REF (Pin 10) | Buffered 1V reference output | Sources/sinks ±1mA; drives capacitive loads ≤1nF; critical for negative-rail divider biasing |
| TMR (Pin 15) | Reset timeout timing input | Connect external capacitor to GND for adjustable delay; tie to VCC to bypass timeout |
| SEL (Pin 14) | Three-state polarity select | Connect to VCC/GND/open to configure V3/V4 inputs for positive/negative monitoring |
| DIS (Pin 13) | Output disable control | Pull high to force UV/OV high regardless of input faults - unique to LTC2914-2 variant |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent UV/OV monitoring | Simultaneously supervises four voltage rails using eight input pins (VH1–VH4, VL1–VL4) with shared UV/OV outputs |
| Adjustable trip thresholds | External resistor dividers set UV/OV points for each rail; 1% resistors maintain ±1.5% overall accuracy |
| Negative supply monitoring support | SEL pin configures V3/V4 inputs for negative rails using REF output as bias reference |
| Glitch-immune comparator architecture | Integrated low-pass filtering at each input prevents false triggering from transient noise without adding hysteresis error |
| Output disable functionality | DIS pin (LTC2914-2 only) allows system-level suppression of UV/OV asserts during maintenance or safe-mode operation |
Applications
| Desktop & Notebook Computers | Network Servers |
|---|---|
Use Scenario: Monitoring 5V, 3.3V, 2.5V, and 1.8V core/I/O rails during boot and runtime. IC Role / Device Role / Timing Role: Quad UV/OV supervisor asserting system reset if any rail falls outside ±10% tolerance window. Use Value: Prevents unstable CPU/memory operation by ensuring all supplies meet spec before release from reset. | Use Scenario: Supervising redundant 12V, 5V, 3.3V, and –12V power modules in blade server chassis. IC Role / Device Role / Timing Role: Detects undervoltage on positive rails and overvoltage on negative rails (e.g., –12V < –13.2V) using SEL-configured inputs. Use Value: Enables early fault detection before downstream logic damage occurs, leveraging ±1.5% threshold accuracy across temperature. |
| Core Voltage Monitors | I/O Voltage Monitors |
Use Scenario: Validating GPU core voltage (e.g., 0.8–1.2V) and memory VDDQ (1.2V) in AI accelerator cards. IC Role / Device Role / Timing Role: Uses buffered REF and precision resistor dividers to monitor low-voltage rails with sub-10mV effective threshold resolution. Use Value: Maintains tight regulation compliance under dynamic load transients due to 500µs max response delay and glitch rejection. | Use Scenario: Ensuring PCIe slot I/O voltages (3.3V, 12V) remain stable during hot-plug events. IC Role / Device Role / Timing Role: Configured with adjustable tUOTO (e.g., 200ms via 22nF) to hold reset until all rails settle post-insertion. Use Value: Eliminates spurious resets caused by insertion-induced dips, thanks to programmable timeout and input filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2914CDHC-2#TRPBF | Same functionality and pinout; commercial temperature range (0°C to 70°C) vs industrial (–40°C to 85°C) | Not suitable for extended-temperature environments such as industrial enclosures or automotive under-hood locations | Select LTC2914IDHC-2#TRPBF when operating ambient exceeds 70°C or requires industrial-grade reliability |
| TPS3307-33DGNR | Triple-channel UV monitor only; no OV detection, no negative rail support, no adjustable timeout, fixed 3.3V threshold | Limited to basic 3.3V rail supervision; cannot replace quad-rail or polarity-flexible monitoring needs | Choose only for cost-sensitive, single-rail applications where OV and negative monitoring are unnecessary |
Compared with LTC2914CDHC-2#TRPBF, the LTC2914IDHC-2#TRPBF extends operational reliability to –40°C to 85°C while retaining identical electrical behavior and layout compatibility; versus TPS3307-33DGNR, it delivers full quad-rail UV/OV supervision with polarity flexibility and timeout control-enabling consolidation of multiple discrete supervisors into one space-efficient IC.
Availability
LTC2914IDHC-2#TRPBF is available at Aetrix Electronics and suitable for desktop/notebook computers, network servers, and core/I/O voltage monitoring applications requiring stable component supply across industrial temperature ranges.
Supply support for LTC2914IDHC-2#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, formed through the acquisition of Linear Technology in 2017.
The LTC2914 product line delivers precision, low-power, multi-rail voltage supervision ICs designed specifically for mission-critical power integrity in computing, communications, and industrial systems.
FAQ
What is the operating temperature range of the LTC2914IDHC-2#TRPBF?
The LTC2914IDHC-2#TRPBF is rated for industrial operation from –40°C to +85°C. This range is confirmed in the Absolute Maximum Ratings table and applies to all electrical specifications unless otherwise noted. The "I" grade designation in the part number explicitly denotes this industrial temperature capability, distinguishing it from commercial (C) and high-reliability (H) variants.
How does the DIS pin function on the LTC2914IDHC-2#TRPBF?
The DIS (Disable) pin on the LTC2914IDHC-2#TRPBF, located at Pin 13, forces both UV and OV outputs into a high-impedance state when pulled high. This feature is exclusive to the "-2" variant and allows system-level suppression of reset asserts during firmware updates or safe-mode transitions. When DIS is left open, its internal 2µA pull-down holds it low, enabling normal monitoring operation.
Can the LTC2914IDHC-2#TRPBF monitor negative voltages, and how is polarity selected?
Yes, the LTC2914IDHC-2#TRPBF monitors up to two negative voltages using its VH3/VL3 and VH4/VL4 inputs. Polarity is selected via the three-state SEL pin (Pin 14): connecting SEL to GND configures both V3 and V4 for negative monitoring, where VHn triggers OV and VLn triggers UV. The buffered 1V REF output provides the necessary bias reference for the external resistor divider.
What is the purpose of the TMR pin, and how is timeout adjusted on the LTC2914IDHC-2#TRPBF?
The TMR (Timer) pin (Pin 15) sets the reset timeout period - the minimum duration UV/OV remains asserted after all monitored voltages return to valid levels. A capacitor (CTMR) from TMR to GND determines the delay: CTMR = tUOTO × 115 nF/s. For example, a 1nF capacitor yields ~8.5ms timeout. Tying TMR to VCC bypasses the timer entirely, causing immediate output release upon fault clearance.
What is the guaranteed threshold accuracy of the LTC2914IDHC-2#TRPBF over temperature?
The LTC2914IDHC-2#TRPBF guarantees ±1.5% relative threshold accuracy over its full –40°C to +85°C operating temperature range. This specification applies to all four UV and OV comparators and is measured against the internal 0.5V reference. Combined with 1% external resistors, total system accuracy remains within ±2.5% for typical rail-monitoring configurations.
LTC2914IDHC-2#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFDFN 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 Open Collector
- Reset:
- Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DFN (5x3)
LTC2914IDHC-2#TRPBF FAQ
1.How can I place an order for LTC2914IDHC-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2914IDHC-2#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 LTC2914IDHC-2#TRPBF reliable?
The price and inventory of LTC2914IDHC-2#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2914IDHC-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2914IDHC-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2914IDHC-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2914IDHC-2#TRPBF?
LTC2914IDHC-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2914IDHC-2#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 LTC2914IDHC-2#TRPBF?
For technical support, including LTC2914IDHC-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2914IDHC-2#TRPBF requirements.
6.How does Aetrix verify that LTC2914IDHC-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2914IDHC-2#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 LTC2914IDHC-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2914IDHC-2#TRPBF?
All LTC2914IDHC-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2914IDHC-2#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 LTC2914IDHC-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC2914IDHC-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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