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Analog Devices Inc. LTC2912HTS8-1#TRMPBF
- Part No.:
- LTC2912HTS8-1#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2912HTS8-1#TRMPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TSOT23-8
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LTC2912HTS8-1#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 (e.g., 8.5ms with 1nF), and operates from 2.3V to 6V supply or up to 48V via internal 6.2V shunt regulator. It is used in industrial servers and automotive control units requiring fail-safe reset signaling under voltage faults.
For engineers reviewing the LTC2912HTS8-1#TRMPBF datasheet, LTC2912HTS8-1#TRMPBF pinout, LTC2912HTS8-1#TRMPBF application, or LTC2912HTS8-1#TRMPBF equivalent, key selection criteria include guaranteed operation down to VCC = 1V, latch-controlled OV output, TSOT-23-8 package compatibility, and –40°C to 125°C extended temperature range.
Technical Context
The LTC2912HTS8-1#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) tied to the TMR pin, enabling programmable reset pulse widths from ~6ms to >10s using external capacitance.
It integrates a 6.2V shunt regulator on VCC, allowing direct connection to 12V/24V/48V rails when paired with a series current-limiting resistor. The LATCH pin enables manual clearing of the latched OV output - a feature distinguishing the -1 variant from -2 (DIS-enabled) and -3 (noninverting OV) versions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 2.3V–6V direct; up to 48V via 6.2V shunt regulator with external series resistor |
| Threshold Accuracy | ±1.5% over full –40°C to 125°C operating range - ensures precise trip points without calibration |
| Quiescent Current | 29µA typical - enables always-on monitoring in battery-backed or low-power systems |
| Reset Timeout | Adjustable 6–14ms per 1nF on TMR pin (H-grade); bypassable by tying TMR to VCC |
| Output Type | Open-drain OV and UV outputs - supports wired-OR configurations and level-shifting |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive, industrial PLC, and telecom base station use |
| VCC UVLO | 1.9V–2.1V with 5–50mV hysteresis - guarantees valid reset assertion during brownout |
Pinout & Package
Package: 8-Lead Plastic TSOT-23 (TS8), 3mm × 1.75mm footprint, exposed pad not present (TSOT-23 variant), θJA = 195°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LATCH (Pin 1) | OV latch clear input | Pulling high clears latched OV output; held low enables latching behavior on OV fault |
| UV (Pin 2) | Undervoltage logic output | Open-drain, asserts low when VH < 0.5V; held low for programmed timeout after recovery |
| OV (Pin 3) | Overvoltage logic output | Open-drain, latched low when VL > 0.5V; cleared only by LATCH pin or power cycle |
| GND (Pin 4) | Device ground reference | Return path for all internal circuitry and external filter capacitors |
| TMR (Pin 5) | Reset timeout timing node | Connects to GND via capacitor (≥10pF) to set delay; tie to VCC to disable timeout |
| VL (Pin 6) | Overvoltage sense input | Monitors low-side divider tap; triggers OV when voltage exceeds 0.5V threshold |
| VH (Pin 7) | Undervoltage sense input | Monitors high-side divider tap; triggers UV when voltage falls below 0.5V threshold |
| VCC (Pin 8) | Power supply input | Accepts 2.3–6V directly; regulates higher voltages via internal 6.2V shunt (max 10mA) |
Key Features
| Feature | Design Value |
|---|---|
| Glitch-immune comparators | Integrated low-pass filtering rejects transients <500µs, eliminating need for external RC snubbers |
| Wide supply flexibility | Operates from 2.3V–6V or up to 48V with series resistor - eliminates external regulator in high-voltage systems |
| Latch-controlled OV output | OV remains asserted until manually cleared via LATCH pin - critical for fault logging and safety interlocks |
| Guaranteed operation at low VCC | Valid UV/OV assertion down to VCC = 1V - ensures reset integrity during deep brownouts |
| High-temp qualification | Rated for –40°C to +125°C ambient - meets AEC-Q100 Grade 0 stress requirements for automotive ECUs |
Applications
| Industrial Motor Drives | Automotive ADAS ECUs |
|---|---|
Use Scenario: Monitoring 24V DC bus in servo drive inverters for undervoltage lockout and overvoltage fault detection during regenerative braking. IC Role / Device Role / Timing Role: LTC2912HTS8-1#TRMPBF acts as primary supervisor, asserting latched OV during bus overvoltage and UV during input sag, with 200ms timeout set via 22nF TMR capacitor. Use Value: Prevents IGBT shoot-through and gate driver damage by enforcing hard reset before re-enabling power stage after fault clearance. | Use Scenario: Supervising 5V and 3.3V rails in radar processing modules where thermal cycling induces voltage drift beyond ±5%. IC Role / Device Role / Timing Role: LTC2912HTS8-1#TRMPBF monitors each rail independently using resistor dividers; latched OV output halts processor boot until stable supply is confirmed. Use Value: Eliminates intermittent boot failures caused by marginal voltage recovery - improves field reliability in engine bay-mounted units. |
| Telecom Base Station Power | Rail-Specific Server PSU Monitoring |
Use Scenario: Detecting 48V input collapse or surge in distributed telecom power shelves operating at –40°C to +70°C ambient. IC Role / Device Role / Timing Role: LTC2912HTS8-1#TRMPBF interfaces directly to 48V via 200kΩ series resistor and 0.1µF bypass; TMR pin strapped to VCC for immediate reset assertion. Use Value: Enables fast, deterministic power-good loss detection without microcontroller intervention - reduces downtime during grid instability. | Use Scenario: Monitoring core CPU voltage (1.2V) and I/O voltage (3.3V) in rack-mounted server PSUs where tight tolerance (±3%) is required. IC Role / Device Role / Timing Role: LTC2912HTS8-1#TRMPBF configured with precision resistors achieves ±1.5% threshold accuracy; UV/OV outputs feed FPGA-based power sequencer. Use Value: Replaces dual discrete supervisors with single IC - saves board space and eliminates mismatch-induced timing skew between rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2912ITS8-1#TRMPBF | Same functionality and pinout, but rated for –40°C to +85°C only | Not suitable for under-hood or high-ambient industrial deployments | Select only if system max ambient ≤85°C and cost sensitivity outweighs long-term reliability margin |
| LTC2913IDDB#TRPBF | Dual independent UV/OV monitor in 3×3mm DFN; no latch function; separate VCC pin | Requires two devices to match single-rail latch behavior; better for multi-rail systems needing independent timeouts | Choose when monitoring two supplies simultaneously and latch is unnecessary; avoid for single-rail safety-critical latch requirement |
Compared with LTC2912ITS8-1#TRMPBF, the LTC2912HTS8-1#TRMPBF provides extended high-temperature operation essential for automotive and industrial edge nodes; versus LTC2913IDDB#TRPBF, it offers simpler single-rail supervision with hardware latch - reducing firmware dependency and BOM count.
Availability
LTC2912HTS8-1#TRMPBF is available at Aetrix Electronics and suitable for industrial motor drives, automotive ADAS ECUs, telecom base station power, and rail-specific server PSU monitoring requiring stable component supply across extended temperature ranges.
Supply support for LTC2912HTS8-1#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.
The LTC2912 product line delivers micropower, precision voltage supervision ICs optimized for space-constrained, high-reliability applications where glitch immunity, wide supply range, and extended temperature operation are mandatory.
FAQ
What is the maximum input voltage the LTC2912HTS8-1#TRMPBF can monitor directly?
The LTC2912HTS8-1#TRMPBF cannot monitor high voltages directly on its VH or VL pins - those inputs are limited to 7.5V absolute maximum. To supervise 48V rails, use a resistor divider to scale the voltage to ≤0.5V at VH/VL, while powering the device via VCC with a series resistor and its internal 6.2V shunt regulator. This maintains accuracy and avoids exceeding pin ratings.
Does the LTC2912HTS8-1#TRMPBF require external pull-up resistors on its OV and UV outputs?
The LTC2912HTS8-1#TRMPBF includes weak internal pull-ups to VCC on both OV and UV outputs, eliminating external resistors in most cases. However, at VCC < 1.5V, the internal pull-up strength drops significantly; for robust high-state assurance at low supply, add a ≤100kΩ external pull-up to VCC on the OV pin - especially critical in systems with wired-OR reset buses.
How does the LATCH pin affect OV behavior in the LTC2912HTS8-1#TRMPBF?
In the LTC2912HTS8-1#TRMPBF, the LATCH pin controls OV output latching: when pulled low, OV latches low upon overvoltage detection and stays asserted until LATCH is raised high or VCC is cycled. When held high, OV behaves like UV - asserting low only for the programmed timeout period after fault clearance, then releasing.
Can the LTC2912HTS8-1#TRMPBF operate reliably at 125°C junction temperature?
Yes - the LTC2912HTS8-1#TRMPBF is fully specified and tested for continuous operation at TJ = 125°C. Its TSOT-23 package has θJA = 195°C/W; to maintain safe junction temperature in a 125°C ambient, ensure PCB copper area and airflow keep power dissipation below ~15mW (e.g., 29µA × 5V = 0.145mW), making thermal design straightforward.
What is the minimum capacitor value required on the TMR pin of the LTC2912HTS8-1#TRMPBF?
The TMR pin of the LTC2912HTS8-1#TRMPBF requires a minimum load of 10pF to ground for stable timing operation. Using less than 10pF may cause erratic timeout behavior or failure to assert reset. For precise timing, select NP0/C0G ceramic capacitors with tight tolerance (±5%) and low leakage (<1.3µA) - especially critical for timeout periods >100ms.
LTC2912HTS8-1#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 Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
LTC2912HTS8-1#TRMPBF FAQ
1.How can I place an order for LTC2912HTS8-1#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2912HTS8-1#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 LTC2912HTS8-1#TRMPBF reliable?
The price and inventory of LTC2912HTS8-1#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2912HTS8-1#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2912HTS8-1#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2912HTS8-1#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2912HTS8-1#TRMPBF?
LTC2912HTS8-1#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2912HTS8-1#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 LTC2912HTS8-1#TRMPBF?
For technical support, including LTC2912HTS8-1#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2912HTS8-1#TRMPBF requirements.
6.How does Aetrix verify that LTC2912HTS8-1#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2912HTS8-1#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 LTC2912HTS8-1#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2912HTS8-1#TRMPBF?
All LTC2912HTS8-1#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2912HTS8-1#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 LTC2912HTS8-1#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2912HTS8-1#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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