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Analog Devices Inc. LTC2912ITS8-2#TRMPBF
- Part No.:
- LTC2912ITS8-2#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2912ITS8-2#TRMPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,959
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Product details
Overview
LTC2912ITS8-2#TRMPBF from Analog Devices is a single-channel UV/OV voltage monitor IC with independent undervoltage and overvoltage detection, ±1.5% threshold accuracy, 29µA quiescent current, and adjustable 6–14ms reset timeout (CTMR = 1nF). It operates from 2.3V to 6V supply or higher via internal 6.6V shunt regulator and supports margining applications via DIS pin disable functionality.
For engineers reviewing the LTC2912ITS8-2#TRMPBF datasheet, LTC2912ITS8-2#TRMPBF pinout, LTC2912ITS8-2#TRMPBF application, or LTC2912ITS8-2#TRMPBF equivalent, this page delivers verified functional identity, TSOT-23-8 package mapping, DIS-enabled dual-output disable behavior, temperature-grade I (–40°C to +85°C), and real-world timing and threshold specifications - all confirmed from Analog Devices Rev. C datasheet.
Technical Context
The LTC2912ITS8-2#TRMPBF implements dual comparator-based monitoring: VH input triggers UV when below 0.5V, VL input triggers OV when above 0.5V. Both inputs include low-pass filtering for glitch immunity without hysteresis-induced trip error. The TMR pin sets timeout via external capacitor (9ms/nF) and can be strapped to VCC to bypass delay.
Its DIS pin (Pin 1 in TS8 package) disables both UV and OV outputs except during VCC UVLO (≥1V guaranteed operation). Internal weak 2µA pull-down ensures safe default operation when DIS is left open. The device uses an internal 6.6V shunt regulator on VCC to support direct connection to 12V/24V/48V supplies with appropriate series resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 2.3V–6V direct; up to 48V with series resistor and internal 6.6V shunt regulator |
| Threshold Accuracy | ±1.5% over full temperature range - enables precise 3.3V ±10% monitoring without calibration |
| Quiescent Current | 29µA typical - supports always-on monitoring in battery-backed or low-power systems |
| UV/OV Timeout | 6–14ms (CTMR = 1nF); scalable to 200ms+ with larger capacitor - ensures reliable reset pulse width |
| Input Glitch Immunity | Integrated low-pass filtering on VH/VL - rejects transients <500µs without hysteresis penalty |
| VCC UVLO Threshold | 2.0V (typ), with 25mV hysteresis - guarantees valid operation before enabling input comparators |
| Output Type | Open-drain UV and OV - supports wired-OR, level-shifting, and flexible pull-up configuration |
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 |
|---|---|---|
| 1 - DIS | Output Disable Control | Pulling high disables UV/OV outputs (except during VCC UVLO); internal 2µA pull-down ensures safe default |
| 2 - UV | Undervoltage Logic Output | Open-drain, asserts low when VH < 0.5V; held low for programmed timeout after recovery |
| 3 - OV | Overvoltage Logic Output | Open-drain, asserts low when VL > 0.5V; disabled when DIS = high |
| 4 - GND | Ground Reference | Primary return path for internal circuitry and external filter capacitors |
| 5 - TMR | Timeout Timer Input | Connects to external capacitor (≥10pF) to set UV/OV assertion duration; tie to VCC to bypass |
| 6 - VL | Overvoltage Sense Input | Monitors low-side divider tap; triggers OV when voltage exceeds 0.5V threshold |
| 7 - VH | Undervoltage Sense Input | Monitors high-side divider tap; triggers UV when voltage falls below 0.5V threshold |
| 8 - VCC | Supply Input / Shunt Regulator | Accepts 2.3–6V directly; regulates >6V supplies via internal 6.6V shunt (max 10mA) |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent UV/OV detection | Enables single-supply monitoring of 3.3V ±10% (e.g., 2.97V–3.63V) using resistor divider |
| DIS pin for margining control | Allows system-level enable/disable of fault outputs during voltage margin testing without hardware change |
| Guaranteed operation down to VCC = 1V | Ensures UV assertion and basic output function even during brown-out conditions |
| Adjustable timeout with capacitor scaling | CTMR = 1nF → 8.5ms timeout; CTMR = 22nF → ~200ms - supports diverse reset timing requirements |
| Glitch-immune comparator inputs | Low-pass filtered VH/VL inputs reject noise spikes <500µs, eliminating need for external RC filters |
Applications
| Server Power Sequencing | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitoring 12V backplane supply in rack-mounted server with hot-swap capability. IC Role / Device Role / Timing Role: LTC2912ITS8-2#TRMPBF acts as primary UV/OV supervisor for main power rail, asserting reset if voltage deviates beyond ±10% tolerance. Use Value: 29µA quiescent current minimizes standby loss; DIS pin allows firmware-controlled disable during dynamic margin testing. |
Use Scenario: Supervising isolated 24V field power in programmable logic controller I/O card. IC Role / Device Role / Timing Role: LTC2912ITS8-2#TRMPBF monitors 24V input with 2.2V threshold (via resistor divider), triggering UV if voltage drops below 21.6V. Use Value: ±1.5% threshold accuracy ensures compliance with IEC 61000-4-11 immunity test margins; TSOT-23 package saves board space in dense I/O layouts. |
| Medical Diagnostic Imaging PSU | Automotive Infotainment Core Supply |
Use Scenario: Validating 48V intermediate bus in MRI power supply before enabling downstream DC/DC converters. IC Role / Device Role / Timing Role: LTC2912ITS8-2#TRMPBF interfaces with 48V rail via series resistor and internal shunt regulator, asserting UV/OV if voltage drifts outside ±5% window. Use Value: 6.6V shunt regulator enables direct 48V connection without external LDO; guaranteed operation at –40°C supports cold-start reliability. |
Use Scenario: Monitoring 3.3V core supply for SoC in automotive infotainment head unit. IC Role / Device Role / Timing Role: LTC2912ITS8-2#TRMPBF detects undervoltage (e.g., <2.97V) during engine cranking and holds system reset until stable. Use Value: 8.5ms minimum timeout prevents false resets during brief dips; open-drain outputs interface cleanly with SoC's active-low reset input. |
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 | LATCH pin instead of DIS; OV latches low on fault and requires external clear signal | Suitable for systems requiring persistent fault indication until manual reset | Select LTC2912ITS8-1#TRMPBF only if latch-hold behavior is required; not drop-in compatible due to Pin 1 function change |
| LTC2912IDDB-2#TRMPBF | Same functionality but in 3mm × 2mm DFN package with exposed thermal pad (θJA = 55°C/W) | Better thermal performance in high-density or thermally constrained PCB layouts | Choose LTC2912IDDB-2#TRMPBF when lower thermal resistance or smaller footprint is critical; pinout differs (Pin 1 = VCC, not DIS) |
Compared with LTC2912ITS8-1#TRMPBF, the LTC2912ITS8-2#TRMPBF replaces latch control with output disable - enabling margining workflows without changing reset logic. Compared with LTC2912IDDB-2#TRMPBF, it trades thermal performance for TSOT-23 compatibility with legacy footprints and simpler assembly.
Availability
LTC2912ITS8-2#TRMPBF is available at Aetrix Electronics and suitable for server power sequencing, industrial PLC I/O modules, medical imaging PSUs, and automotive infotainment core supply monitoring requiring stable component supply across extended temperature ranges.
Supply support for LTC2912ITS8-2#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 precision instrumentation, industrial automation, communications, and healthcare markets.
The LTC2912 product line delivers micropower, high-accuracy voltage supervision for space-constrained and thermally demanding applications - specifically engineered for reliable UV/OV detection in computing, networking, and industrial power systems.
FAQ
What is the operating temperature range of the LTC2912ITS8-2#TRMPBF?
The LTC2912ITS8-2#TRMPBF is rated for –40°C to +85°C (Industrial grade). This is confirmed in the "ORDER INFORMATION" table on page 3 of the Rev. C datasheet, where "ITS8" denotes the Industrial temperature variant. The device maintains ±1.5% threshold accuracy across this full range.
How does the DIS pin on the LTC2912ITS8-2#TRMPBF function?
The DIS pin (Pin 1) on the LTC2912ITS8-2#TRMPBF disables both UV and OV outputs when pulled high, forcing them into a weakly pulled-high state. During VCC undervoltage lockout (UVLO), UV still asserts low regardless of DIS state. The pin has a 2µA internal pull-down, so leaving it unconnected defaults to enabled operation.
Can the LTC2912ITS8-2#TRMPBF monitor a 48V supply directly?
Yes - the LTC2912ITS8-2#TRMPBF supports 48V monitoring via its internal 6.6V shunt regulator on the VCC pin. A series current-limiting resistor must be used to keep input current ≤10mA. For example, with 48V input and 6.6V regulation, RZ ≥ (48V – 6.6V)/10mA = 4.14kΩ. This is detailed in the "Shunt Regulator" section on page 10.
What is the minimum timeout period achievable with the LTC2912ITS8-2#TRMPBF?
The minimum timeout period for the LTC2912ITS8-2#TRMPBF is 6ms (typical) with CTMR = 1nF, per the Electrical Characteristics table on page 4. The TMR pin requires ≥10pF load; using smaller capacitors is not supported and may cause unstable timing behavior.
Is the LTC2912ITS8-2#TRMPBF pin-compatible with other LTC2912 variants in TSOT-23?
No - the LTC2912ITS8-2#TRMPBF is not pin-compatible with LTC2912ITS8-1#TRMPBF or LTC2912ITS8-3#TRMPBF. Pin 1 is DIS in the -2 variant but LATCH in the -1/-3 variants. Swapping them without PCB revision will result in incorrect or nonfunctional behavior, as confirmed in the "PACKAGE/ORDER INFORMATION" diagrams on pages 2–3.
LTC2912ITS8-2#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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
LTC2912ITS8-2#TRMPBF FAQ
1.How can I place an order for LTC2912ITS8-2#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2912ITS8-2#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 LTC2912ITS8-2#TRMPBF reliable?
The price and inventory of LTC2912ITS8-2#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2912ITS8-2#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2912ITS8-2#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2912ITS8-2#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2912ITS8-2#TRMPBF?
LTC2912ITS8-2#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2912ITS8-2#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 LTC2912ITS8-2#TRMPBF?
For technical support, including LTC2912ITS8-2#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2912ITS8-2#TRMPBF requirements.
6.How does Aetrix verify that LTC2912ITS8-2#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2912ITS8-2#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 LTC2912ITS8-2#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2912ITS8-2#TRMPBF?
All LTC2912ITS8-2#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2912ITS8-2#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 LTC2912ITS8-2#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2912ITS8-2#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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