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Analog Devices Inc. LTC2912HTS8-3#TRMPBF
- Part No.:
- LTC2912HTS8-3#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2912HTS8-3#TRMPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:285
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Product details
Overview
LTC2912HTS8-3#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 operates from 2.3V to 6V (or higher with shunt regulation). It delivers noninverting OV output and open-drain UV output - used in industrial servers and automotive control modules requiring fail-safe reset signaling.
For engineers reviewing the LTC2912HTS8-3#TRMPBF datasheet, LTC2912HTS8-3#TRMPBF pinout, LTC2912HTS8-3#TRMPBF application, or LTC2912HTS8-3#TRMPBF equivalent, key selection criteria include guaranteed operation down to VCC = 1V, glitch-immune VH/VL inputs, H-grade (–40°C to 125°C) temperature rating, and TSOT-23-8 package compatibility with space-constrained PCB layouts.
Technical Context
The LTC2912HTS8-3#TRMPBF implements dual comparator-based monitoring with internal 0.5V reference, low-pass filtering on VH and VL inputs to reject transient glitches, and independent UV/OV output timing controlled by an external TMR capacitor. Its internal VCC shunt regulator enables direct operation from 12V/24V/48V supplies when paired with a series current-limiting resistor.
As the -3 variant, it provides a noninverting OV output (asserts high on overvoltage), latch-clear functionality via LATCH pin, and guaranteed UV/OV assertion at VCC ≥ 1V. The H-grade version ensures full electrical performance across –40°C to 125°C ambient, with thermal resistance θJA = 195°C/W in TSOT-23-8 package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.3V to 6V direct; up to 48V with external series resistor and internal 6.2–7.3V shunt regulator |
| UV/OV 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 |
| Reset Timeout Control | Adjustable via external CTMR capacitor (e.g., 1nF → 8.5ms); TMR pin can be tied to VCC to bypass |
| Operating Temperature | –40°C to +125°C (H-grade) - qualified for under-hood automotive and industrial control applications |
| Output Configuration | Open-drain UV (active-low), noninverting OV (active-high with weak pull-up to VCC) |
| Input Glitch Immunity | Integrated low-pass filtering on VH/VL inputs rejects sub-500µs transients - eliminates false resets |
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/bypass input | Pulling high clears OV latch and makes OV behave like UV (timed active-high); low enables latching behavior |
| UV (Pin 2) | Undervoltage logic output | Open-drain, active-low output asserted when VH < 0.5V; held low for programmable timeout after recovery |
| OV (Pin 3) | Overvoltage logic output | Noninverting, active-high output with weak internal pull-up to VCC; latches high on VL > 0.5V |
| GND (Pin 4) | Device ground reference | Return path for all internal circuitry and external filter/timing capacitors |
| TMR (Pin 5) | Reset timeout timer input | Connects to external capacitor (≥10pF) to GND; sets UV/OV assertion duration (9ms/nF typical) |
| VL (Pin 6) | Voltage Low monitor input | Detects overvoltage: asserts OV when voltage exceeds 0.5V threshold (e.g., via resistive divider) |
| VH (Pin 7) | Voltage High monitor input | Detects undervoltage: asserts UV when voltage falls below 0.5V threshold |
| VCC (Pin 8) | Supply voltage input | Accepts 2.3–6V directly; regulates higher voltages (e.g., 12V/24V) via internal 6.2–7.3V shunt |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed operation at VCC ≥ 1V | Enables valid reset signaling during brown-out or slow power ramp-up, critical for safe system boot |
| Adjustable UV/OV timeout disable | TMR pin strapped to VCC disables timeout - provides immediate, non-latched fault response |
| Power supply glitch immunity | Internal RC filtering rejects transients < 500µs - avoids spurious resets in noisy industrial environments |
| H-grade temperature qualification | Full parametric performance verified from –40°C to +125°C - suitable for engine control units and base station power |
| Open-drain UV + noninverting OV outputs | Supports wired-OR reset bus architecture while enabling direct connection to microcontroller GPIO with pull-up |
Applications
| Industrial PLC Power Supervision | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Monitors 5V auxiliary rail in programmable logic controller with 12V input supply and wide ambient temperature swings. IC Role / Device Role / Timing Role: LTC2912HTS8-3#TRMPBF acts as primary UV/OV supervisor, asserting UV on rail collapse and OV on surge, with 200ms timeout set by 22nF TMR capacitor. Use Value: ±1.5% threshold accuracy prevents nuisance resets during thermal drift; H-grade rating ensures reliability at 125°C junction temperature. | Use Scenario: Supervises 3.3V microcontroller core supply in engine bay ECU powered from 12V battery with load dump transients. IC Role / Device Role / Timing Role: LTC2912HTS8-3#TRMPBF monitors 3.3V rail using resistive divider on VH/VL; noninverting OV output drives reset logic directly. Use Value: Glitch immunity rejects 100ns–1µs load dump spikes; VCC shunt regulation allows direct 12V connection without external LDO. |
| Telecom Base Station PSU Monitoring | Rail-Specific Server Core Voltage Monitor |
Use Scenario: Detects overvoltage on 48V intermediate bus in telecom rectifier module where fast fault isolation is mandatory. IC Role / Device Role / Timing Role: LTC2912HTS8-3#TRMPBF configured with RA/RB/RC divider on VL input triggers OV within 125µs of excursion beyond 52.8V (48V +10%). Use Value: 29µA quiescent current minimizes standby loss; TMR-adjustable timeout ensures compliance with IEC 61000-4-5 surge recovery timing. | Use Scenario: Validates 3.3V ±10% I/O supply in high-density server motherboard with tight layout constraints. IC Role / Device Role / Timing Role: LTC2912HTS8-3#TRMPBF placed adjacent to VRM output, using TSOT-23-8 package to minimize trace inductance on VH/VL sense lines. Use Value: Small 3mm × 1.75mm footprint saves board area; open-drain UV supports shared reset bus with other supervisors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2912ITS8-3#TRMPBF | I-grade (–40°C to +85°C), identical electrical specs and pinout | Not rated for continuous operation above 85°C ambient - unsuitable for under-hood or enclosed industrial enclosures | Select only if system max ambient ≤ 85°C and cost sensitivity outweighs thermal margin needs |
| LTC2913HDD-3#TRPBF | Dual UV/OV monitor in 3mm × 3mm DFN-10; separate VCC pin; no LATCH function | Monitors two independent rails simultaneously; lacks latch-clear capability and noninverting OV output | Choose when dual-rail supervision is required and board space allows larger DFN package |
Compared with LTC2912ITS8-3#TRMPBF, the LTC2912HTS8-3#TRMPBF adds 40°C higher max operating temperature without trade-offs in accuracy or power. Versus LTC2913HDD-3#TRPBF, it offers simpler single-rail supervision with latch control and smaller TSOT-23 footprint - ideal for space- and thermal-critical designs.
Availability
LTC2912HTS8-3#TRMPBF is available at Aetrix Electronics and suitable for industrial PLCs, automotive ECUs, telecom base station PSUs, and server core voltage monitoring requiring stable component supply across extended temperature ranges.
Supply support for LTC2912HTS8-3#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, Inc. 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 precision, low-power voltage supervision ICs optimized for mission-critical power integrity in harsh thermal and electrical environments - especially where single-rail UV/OV detection with latch control and wide supply range is essential.
FAQ
What is the maximum input voltage the LTC2912HTS8-3#TRMPBF can tolerate on its VCC pin?
The LTC2912HTS8-3#TRMPBF has an absolute maximum VCC pin voltage of 6V when used as a direct supply input. For higher voltages (e.g., 12V, 24V, 48V), it operates as a shunt regulator with internal 6.2–7.3V regulation - but requires an external series resistor to limit input current to ≤10mA. Exceeding this current risks damage per Absolute Maximum Ratings.
How does the LATCH pin affect OV behavior in the LTC2912HTS8-3#TRMPBF?
In the LTC2912HTS8-3#TRMPBF, the LATCH pin controls OV output latching: when pulled low, OV latches high upon overvoltage detection and remains high until LATCH is pulled high to clear it. When LATCH is high, OV behaves like UV - asserting high for a programmable timeout period after VL recovers, then releasing.
Can the LTC2912HTS8-3#TRMPBF monitor negative voltages?
No - the LTC2912HTS8-3#TRMPBF is designed exclusively for positive voltage monitoring. Its VH and VL inputs are referenced to GND and require positive input signals between 0V and 7.5V. For negative rail supervision, Analog Devices recommends the LTC2909, which supports dedicated negative voltage inputs.
What is the minimum TMR capacitor value supported by the LTC2912HTS8-3#TRMPBF?
The LTC2912HTS8-3#TRMPBF requires a minimum 10pF capacitor on the TMR pin to GND for stable timeout operation. Capacitors smaller than 10pF may cause inconsistent or shortened timeout periods due to parasitic effects. For bypassing the timer entirely, tie TMR directly to VCC.
Does the LTC2912HTS8-3#TRMPBF provide hysteresis on its UV/OV thresholds?
No - the LTC2912HTS8-3#TRMPBF does not implement built-in hysteresis. Instead, it achieves robust noise immunity through low-pass filtering on the VH and VL comparator outputs, rejecting brief transients without introducing hysteresis-induced trip-point error. System-level hysteresis must be implemented externally via resistor divider design.
LTC2912HTS8-3#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
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
LTC2912HTS8-3#TRMPBF FAQ
1.How can I place an order for LTC2912HTS8-3#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2912HTS8-3#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 LTC2912HTS8-3#TRMPBF reliable?
The price and inventory of LTC2912HTS8-3#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2912HTS8-3#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2912HTS8-3#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2912HTS8-3#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2912HTS8-3#TRMPBF?
LTC2912HTS8-3#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2912HTS8-3#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 LTC2912HTS8-3#TRMPBF?
For technical support, including LTC2912HTS8-3#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2912HTS8-3#TRMPBF requirements.
6.How does Aetrix verify that LTC2912HTS8-3#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2912HTS8-3#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 LTC2912HTS8-3#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2912HTS8-3#TRMPBF?
All LTC2912HTS8-3#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2912HTS8-3#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 LTC2912HTS8-3#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2912HTS8-3#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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