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Analog Devices Inc. LTC2912HTS8-2#TRMPBF
- Part No.:
- LTC2912HTS8-2#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2912HTS8-2#TRMPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:505
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Product details
Overview
LTC2912HTS8-2#TRMPBF from Analog Devices is a high-temperature single UV/OV voltage monitor IC designed for reliable power supply supervision in harsh environments. It features ±1.5% threshold accuracy, 29µA quiescent current, adjustable reset timeout via external capacitor, and dual open-drain OV/UV outputs with independent fault detection. It operates from 2.3V to 6V supply or up to 48V via internal shunt regulator and is used in industrial servers and telecom power systems requiring fail-safe reset signaling.
For engineers reviewing the LTC2912HTS8-2#TRMPBF datasheet, LTC2912HTS8-2#TRMPBF pinout, LTC2912HTS8-2#TRMPBF application, or LTC2912HTS8-2#TRMPBF equivalent, key selection criteria include its –40°C to 125°C operating range, DIS pin-enabled margining capability, guaranteed VCC ≥ 1V output validity, and TSOT-23-8 package compatibility with space-constrained PCB layouts.
Technical Context
The LTC2912HTS8-2#TRMPBF implements dual comparator-based monitoring with independent VH (undervoltage) and VL (overvoltage) inputs, each filtered to reject sub-500µs glitches. Its internal oscillator drives an adjustable timeout timer (tUOTO = 6–14ms at CTMR = 1nF), and the DIS pin disables both OV and UV outputs except during VCC undervoltage lockout (UVLO).
It integrates a 6.2–7.3V internal shunt regulator enabling direct operation from 12V/24V/48V supplies when paired with a series current-limiting resistor. The H-grade variant guarantees full electrical performance across –40°C to 125°C, including ±15nA input bias current and 50–500µs propagation delay from threshold crossing to output assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.3V to 6V direct; up to 48V via shunt regulator with external series resistor |
| Threshold Accuracy | ±1.5% over full temperature range - ensures precise 3.3V ±10% monitoring without calibration |
| Quiescent Current | 29µA typical - enables micropower operation in battery-backed or always-on systems |
| UV/OV Timeout Range | 6ms to 14ms (H-grade) with 1nF TMR capacitor - sets minimum reset pulse width for system stability |
| Operating Temperature | –40°C to 125°C - qualified for under-hood automotive, industrial control, and base station applications |
| VCC UVLO Threshold | 1.9V to 2.1V with 5–50mV hysteresis - prevents erratic behavior during brown-out conditions |
| Input Bias Current | ±15nA max (H-grade) - minimizes error in high-impedance resistive divider networks |
Pinout & Package
Package: 8-Lead Plastic TSOT-23 (TS8), 3mm × 1.75mm footprint, exposed pad not present in TSOT-23 variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIS) | Output Disable Input | Pulls high to disable OV/UV outputs; weak 2µA internal pull-down allows open-circuit use |
| 2 (UV) | Undervoltage Logic Output | Open-drain, asserts low on VH < 0.5V; held low for programmable timeout after recovery |
| 3 (OV) | Overvoltage Logic Output | Open-drain, asserts low on VL > 0.5V; disabled when DIS = high except during VCC UVLO |
| 4 (GND) | Ground Reference | Primary return path for internal circuitry and external timing capacitor |
| 5 (TMR) | Reset Timeout Timer Input | Accepts external capacitor (≥10pF) to set tUOTO = 9ms/nF; tie to VCC to bypass timer |
| 6 (VL) | Overvoltage Sense Input | Monitors low-side of resistive divider; triggers OV when voltage exceeds 0.5V threshold |
| 7 (VH) | Undervoltage Sense Input | Monitors high-side of resistive divider; triggers UV when voltage falls below 0.5V threshold |
| 8 (VCC) | Supply Input / Shunt Regulator | Operates as direct supply (≤6V) or shunt-regulated input (≥6V); requires 0.1µF bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable UV/OV timeout | Programmable 6–14ms (H-grade) via single external capacitor - eliminates need for external RC timers |
| Glitch-immune inputs | Internal low-pass filtering rejects transients < 500µs - prevents false resets in noisy power rails |
| High-temp reliability | Specified and tested over –40°C to 125°C - supports deployment in engine control units and industrial PLCs |
| Margining support | DIS pin enables controlled OV/UV output disable during voltage margin testing - simplifies production test flow |
| Wide-supply operation | Internal 6.2–7.3V shunt regulator allows direct connection to 12V/24V/48V rails - reduces BOM count |
Applications
| Industrial Server Power Sequencing | Telecom 48V DC-DC Supervision |
|---|---|
Use Scenario: Monitoring primary 48V input and secondary 3.3V/12V rails in carrier-grade base station power modules. IC Role / Device Role / Timing Role: LTC2912HTS8-2#TRMPBF acts as dual-rail supervisor, asserting UV/OV only after sustained deviation beyond ±10%, with 85ms timeout ensuring clean power-good deassertion. Use Value: Prevents premature processor boot during 48V line sag by enforcing minimum valid window before releasing reset - improves field reliability. |
Use Scenario: Supervising isolated 48V-to-12V DC-DC converters in optical line terminal (OLT) chassis. IC Role / Device Role / Timing Role: LTC2912HTS8-2#TRMPBF monitors converter output using 3-resistor divider; DIS pin enables dynamic margin testing during factory calibration. Use Value: Enables automated voltage margining without hardware rework - reduces test time by eliminating manual jumper changes. |
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
Use Scenario: Validating 5V microcontroller supply in under-hood ECU exposed to ambient temperatures up to 125°C. IC Role / Device Role / Timing Role: LTC2912HTS8-2#TRMPBF provides UV/OV detection with guaranteed operation at 125°C junction temperature and 29µA supply current. Use Value: Eliminates need for external thermal derating or heatsinking - maintains compact form factor in sealed enclosures. |
Use Scenario: Ensuring stable 24V logic supply in modular PLC backplane with multiple hot-swap I/O cards. IC Role / Device Role / Timing Role: LTC2912HTS8-2#TRMPBF supervises 24V rail with 200ms timeout (via 22nF TMR cap), preventing spurious resets during card insertion transients. Use Value: Glitch immunity rejects 100ns noise spikes from relay switching - avoids unintended controller reboot during field maintenance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2912ITS8-2#TRMPBF | Same functionality but rated for –40°C to 85°C; lower max operating temperature and no H-grade thermal validation | Suitable for commercial/industrial indoor equipment; not qualified for under-hood or high-ambient deployments | Select when ambient temperature stays below 85°C and cost sensitivity outweighs extended thermal margin |
| LTC2912HDDB-2#TRMPBF | Identical H-grade specs but in 3mm × 2mm DFN package with exposed GND pad; θJA = 55°C/W vs TSOT-23's 195°C/W | Better thermal performance in high-power-density layouts; requires different PCB land pattern and soldering profile | Choose for thermally constrained designs where board space allows DFN and enhanced heat dissipation is critical |
Compared with LTC2912ITS8-2#TRMPBF, the LTC2912HTS8-2#TRMPBF delivers verified operation at 125°C junction temperature and tighter input bias current spec, while LTC2912HDDB-2#TRMPBF offers superior thermal resistance but demands revised layout and assembly process.
Availability
LTC2912HTS8-2#TRMPBF is available at Aetrix Electronics and suitable for industrial server power sequencing, telecom 48V DC-DC supervision, and automotive ECU applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2912HTS8-2#TRMPBF 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 since 1965.
The LTC2912 product line delivers precision, low-power voltage supervision ICs optimized for mission-critical power integrity in servers, telecom infrastructure, and harsh-environment control systems.
FAQ
What is the maximum supply voltage the LTC2912HTS8-2#TRMPBF can tolerate on the VCC pin?
The LTC2912HTS8-2#TRMPBF VCC pin has an absolute maximum rating of 6V when used as a direct supply. For higher voltages such as 12V, 24V, or 48V, the internal 6.2–7.3V shunt regulator must be used with an external series current-limiting resistor to keep input current ≤10mA. Exceeding this current risks damage per Absolute Maximum Ratings.
How does the DIS pin function on the LTC2912HTS8-2#TRMPBF?
The DIS pin on the LTC2912HTS8-2#TRMPBF disables both OV and UV outputs when pulled high, forcing them into a weakly pulled-high state. However, during VCC undervoltage lockout (UVLO), UV still asserts low regardless of DIS state. The pin has a 2µA internal pull-down, so it may be left unconnected for normal operation.
What is the guaranteed timeout period for the LTC2912HTS8-2#TRMPBF at 125°C junction temperature?
At –40°C to 125°C, the LTC2912HTS8-2#TRMPBF guarantees a UV/OV timeout period of 6ms to 14ms when a 1nF capacitor is connected to the TMR pin. This range reflects H-grade characterization across temperature and process variation, ensuring predictable reset pulse width in high-temp environments.
Can the LTC2912HTS8-2#TRMPBF monitor negative voltages?
No, the LTC2912HTS8-2#TRMPBF is designed exclusively for positive voltage monitoring. Its VH and VL inputs require referenced-to-GND signals between –0.3V and 7.5V, and its internal comparators are biased for 0.5V thresholds. For negative rail supervision, Analog Devices recommends the LTC2909, which supports dedicated negative voltage inputs.
What is the purpose of the TMR pin on the LTC2912HTS8-2#TRMPBF?
The TMR pin on the LTC2912HTS8-2#TRMPBF sets the duration of the UV and OV reset pulses via an external capacitor to ground. With CTMR = 1nF, the timeout is 8.5ms (H-grade). Tying TMR to VCC bypasses the timer entirely, causing immediate output assertion upon fault detection - useful for fast-fail safety-critical paths.
LTC2912HTS8-2#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Open Drain or Open Collector
- Reset:
- Active High/Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
LTC2912HTS8-2#TRMPBF FAQ
1.How can I place an order for LTC2912HTS8-2#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2912HTS8-2#TRMPBF 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 LTC2912HTS8-2#TRMPBF reliable?
The price and inventory of LTC2912HTS8-2#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2912HTS8-2#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2912HTS8-2#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2912HTS8-2#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2912HTS8-2#TRMPBF?
LTC2912HTS8-2#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2912HTS8-2#TRMPBF 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 LTC2912HTS8-2#TRMPBF?
For technical support, including LTC2912HTS8-2#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2912HTS8-2#TRMPBF requirements.
6.How does Aetrix verify that LTC2912HTS8-2#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2912HTS8-2#TRMPBF 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 LTC2912HTS8-2#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2912HTS8-2#TRMPBF?
All LTC2912HTS8-2#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2912HTS8-2#TRMPBF, 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 LTC2912HTS8-2#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2912HTS8-2#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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