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Analog Devices Inc. LTC2914HGN-2#TRPBF
- Part No.:
- LTC2914HGN-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC2914HGN-2#TRPBF.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,960
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Product details
Overview
LTC2914HGN-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 high-reliability systems. It features ±1.5% threshold accuracy over temperature, 62µA quiescent current, buffered 1V reference output, and open-drain UV/OV outputs with adjustable reset timeout. It is used in desktop/notebook computers and network servers for core/I/O rail supervision.
For engineers reviewing the LTC2914HGN-2#TRPBF datasheet, LTC2914HGN-2#TRPBF pinout, LTC2914HGN-2#TRPBF application, or LTC2914HGN-2#TRPBF equivalent, key selection criteria include its –40°C to 125°C operating range, dual-polarity input capability (supporting up to two negative voltages), DIS pin-based output disable functionality, and guaranteed UV/OV assertion at VCC ≥ 1V.
Technical Context
The LTC2914HGN-2#TRPBF implements four independent comparator pairs (VHn/VLn) sharing common UV and OV open-drain outputs. Its three-state SEL pin selects polarity configuration (positive/positive, positive/negative, or negative/negative) for inputs VH3/VL3 and VH4/VL4 without external components. The DIS pin (Pin 13) disables both UV and OV outputs when pulled high - a defining functional distinction from the LTC2914-1 variant.
Threshold detection uses a precision 0.5V internal reference scaled by external resistor dividers; all monitors share identical 492–508 mV trip window (±1.5% over –40°C to 125°C). Glitch rejection is achieved via integrated low-pass filtering on each comparator output, and reset timing is set by an external capacitor on TMR (Pin 15), with typical timeout of 8.5 ms at CTMR = 1 nF.
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 125°C range - ensures reliable trip points across automotive/industrial thermal environments |
| Quiescent Current | 62 µA typical - enables always-on monitoring in battery-backed or low-power systems |
| Reference Output | 1.000 V ±15 mV (±1.5%) - buffered, ±1 mA capable, supports negative-rail sensing offset |
| UV/OV Timeout Range | 6–14 ms at CTMR = 1 nF - adjustable via external capacitor (9 ms/nF scaling) |
| Input Voltage Range | VHn/VLn: –0.3V to 7.5V - allows direct monitoring of negative supplies down to –5V with proper divider |
| Output Type | Open-drain UV/OV with weak internal pull-up to VCC - supports wired-OR and level-shifting |
Pinout & Package
Package: 16-Lead Plastic SSOP (Standard Small Outline Package), 0.150" wide, RoHS-compliant, moisture-sensitive level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VH1 (Pin 1) | Positive-voltage undervoltage sense input | Triggers UV when voltage falls below 0.5V threshold; tied to VCC if unused |
| VL1 (Pin 2) | Positive-voltage overvoltage sense input | Triggers OV when voltage rises above 0.5V threshold; tied to GND if unused |
| VH2 (Pin 3) | Second positive-voltage undervoltage sense input | Same function as VH1; supports independent monitoring of second rail |
| VL2 (Pin 4) | Second positive-voltage overvoltage sense input | Same function as VL1; supports independent monitoring of second rail |
| VH3 (Pin 5) | Configurable polarity undervoltage/overvoltage input | Role depends on SEL state: UV for positive, OV for negative monitoring |
| VL3 (Pin 6) | Configurable polarity overvoltage/undervoltage input | Role depends on SEL state: OV for positive, UV for negative monitoring |
| VH4 (Pin 7) | Configurable polarity undervoltage/overvoltage input | Same behavior as VH3; third/fourth rail support with polarity flexibility |
| VL4 (Pin 8) | Configurable polarity overvoltage/undervoltage input | Same behavior as VL3; completes quad-monitor capability |
| GND (Pin 9) | Device ground reference | Primary return path for internal circuitry and reference buffer |
| REF (Pin 10) | Buffered 1V reference output | Sources/sinks ±1 mA; drives ≤1 nF capacitive load; enables negative-supply offset |
| OV (Pin 11) | Common overvoltage logic output | Open-drain, asserted low on any OV condition; disabled when DIS = high |
| UV (Pin 12) | Common undervoltage logic output | Open-drain, asserted low on any UV condition; disabled when DIS = high |
| DIS (Pin 13) | Output disable control | Pulled high to disable both UV and OV outputs; internal 2 µA pull-down when open |
| SEL (Pin 14) | Three-state polarity select | Connect to VCC/GND/open to configure VH3/VL3 & VH4/VL4 as +/+, +/−, or −/− |
| TMR (Pin 15) | Reset timeout timer input | Capacitor-to-GND sets delay (9 ms/nF); tie to VCC to bypass timeout |
| VCC (Pin 16) | Power supply input | Operates from 2.3V–6V; internal 6.6V shunt regulator enables higher-voltage operation |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent UV/OV monitoring | Four VH/VL input pairs enable simultaneous supervision of 4 distinct rails (e.g., 5V, 3.3V, 2.5V, 1.8V) with single IC |
| Adjustable polarity per input pair | SEL pin configures VH3/VL3 and VH4/VL4 for positive-only, mixed, or dual-negative monitoring without external switches |
| Output disable via DIS pin | Hardware-controlled disable of both UV and OV outputs eliminates need for software gating or external logic |
| Guaranteed operation at low VCC | UV/OV assertion guaranteed at VCC ≥ 1V - critical for brown-out detection during power ramp-up/down |
| Glitch-immune comparator architecture | Integrated low-pass filtering prevents false triggering from transient noise on monitored rails |
| Buffered 1V reference | Stable, low-drift reference supports accurate negative-rail monitoring and external circuit biasing |
Applications
| Desktop Computer Power Sequencing | Notebook Computer Battery Management |
|---|---|
Use Scenario: Monitoring 12V, 5V, 3.3V, and 1.8V rails during cold boot and thermal throttling events. IC Role / Device Role / Timing Role: Quad UV/OV supervisor asserting system reset if any rail deviates beyond ±10% tolerance during startup or runtime. Use Value: Prevents CPU/GPU lockup by ensuring all voltage domains stabilize before firmware execution begins. | Use Scenario: Supervising main battery (12.6V), system rail (5V), DDR memory (1.2V), and PMIC core (0.85V) in portable platforms. IC Role / Device Role / Timing Role: Detects undervoltage on battery input and overvoltage on regulated outputs to trigger graceful shutdown or charge controller intervention. Use Value: Extends battery life and prevents data corruption by initiating controlled power-down before critical rail collapse. |
| Network Server Core Voltage Monitoring | Industrial PLC I/O Module Supply Integrity |
Use Scenario: Continuous monitoring of CPU VDD (1.1V), VDDQ (1.2V), auxiliary 3.3V, and 12V fan supply in 24/7 data center hardware. IC Role / Device Role / Timing Role: Provides fail-safe reset signaling to BMC (Baseboard Management Controller) upon rail fault, with 8.5ms timeout preventing nuisance resets. Use Value: Enables remote diagnostics and automatic recovery without manual intervention during transient line disturbances. | Use Scenario: Verifying integrity of isolated 24V field power, 5V logic rail, 3.3V FPGA core, and –12V analog bias in harsh factory-floor environments. IC Role / Device Role / Timing Role: Uses SEL-configured negative monitoring to supervise –12V analog supply while simultaneously checking three positive rails. Use Value: Ensures analog sensor accuracy and digital logic stability by detecting rail deviations before process faults occur. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2914IGN-2#TRPBF | Same functionality and pinout; rated for –40°C to 85°C instead of –40°C to 125°C | Suitable for commercial/industrial ambient environments but not extended-temperature industrial or under-hood automotive | Select when full 125°C operation is unnecessary and cost optimization is prioritized |
| TPS3307-33DGNR | Triple-channel (not quad), fixed 3.3V UV/OV thresholds, no negative rail support, no DIS pin | Lacks configurable polarity, adjustable timeout, and fourth channel - requires additional ICs for full quad coverage | Choose only for simpler 3-rail systems where negative monitoring and output disable are not required |
Compared with LTC2914IGN-2#TRPBF, the LTC2914HGN-2#TRPBF delivers extended temperature reliability for demanding deployments; compared with TPS3307-33DGNR, it provides full quad monitoring, negative rail capability, and hardware disable - eliminating design compromises in complex power architectures.
Availability
LTC2914HGN-2#TRPBF is available at Aetrix Electronics and suitable for desktop computers, network servers, and industrial PLCs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2914HGN-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 was designed by Linear Technology specifically for space-constrained, multi-rail power supervision in computing and communications infrastructure - emphasizing micropower operation, precision thresholding, and flexible polarity configuration.
FAQ
What is the operating temperature range of the LTC2914HGN-2#TRPBF?
The LTC2914HGN-2#TRPBF is rated for operation from –40°C to +125°C, making it suitable for extended-temperature industrial, automotive under-hood, and high-density server applications where thermal margins exceed standard commercial or industrial grade limits. This rating is confirmed in the Absolute Maximum Ratings table and applies across all electrical specifications unless otherwise noted.
How does the DIS pin on the LTC2914HGN-2#TRPBF function?
The DIS (Disable) pin (Pin 13) on the LTC2914HGN-2#TRPBF disables both UV and OV outputs when pulled high. When active, it forces both outputs into a weakly pulled-high state regardless of input conditions - a hardware-level override that eliminates the need for external logic or firmware intervention. The pin has an internal 2 µA pull-down, so it may be left floating if disable functionality is not required.
Can the LTC2914HGN-2#TRPBF monitor negative voltages?
Yes, the LTC2914HGN-2#TRPBF can monitor up to two negative voltages using its configurable VH3/VL3 and VH4/VL4 inputs. Polarity is selected via the three-state SEL pin: when configured for negative monitoring, VHn triggers OV and VLn triggers UV. A buffered 1V reference (Pin 10) provides the necessary offset, enabling accurate supervision of rails such as –5V or –12V with standard resistor dividers.
What is the purpose of the TMR pin on the LTC2914HGN-2#TRPBF?
The TMR (Timer) pin (Pin 15) on the LTC2914HGN-2#TRPBF sets the reset timeout period via an external capacitor to ground. With CTMR = 1 nF, the typical timeout is 8.5 ms; scaling is ~9 ms/nF. This timeout holds UV/OV asserted after fault clearance, ensuring sufficient system settling time. Tying TMR to VCC bypasses the timer entirely, causing immediate output release upon fault recovery.
Does the LTC2914HGN-2#TRPBF require external resistors for voltage monitoring?
Yes, the LTC2914HGN-2#TRPBF requires external resistor dividers on each VHn/VLn pair to scale monitored voltages to its internal 0.5V threshold. For example, a 5V rail uses RA ≈ 45.3kΩ, RB ≈ 10kΩ, and RC ≈ 442kΩ (1% tolerance recommended). These resistors determine actual UV/OV trip points and directly impact overall accuracy - combined with the IC's ±1.5% threshold tolerance, total error remains within ±2.5% for well-designed networks.
LTC2914HGN-2#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
LTC2914HGN-2#TRPBF FAQ
1.How can I place an order for LTC2914HGN-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2914HGN-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 LTC2914HGN-2#TRPBF reliable?
The price and inventory of LTC2914HGN-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 LTC2914HGN-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2914HGN-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2914HGN-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2914HGN-2#TRPBF?
LTC2914HGN-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2914HGN-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 LTC2914HGN-2#TRPBF?
For technical support, including LTC2914HGN-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2914HGN-2#TRPBF requirements.
6.How does Aetrix verify that LTC2914HGN-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2914HGN-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 LTC2914HGN-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2914HGN-2#TRPBF?
All LTC2914HGN-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2914HGN-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 LTC2914HGN-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC2914HGN-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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