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Analog Devices Inc. LTC2912CTS8-2#TRMPBF
- Part No.:
- LTC2912CTS8-2#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2912CTS8-2#TRMPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:183
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Product details
Overview
LTC2912CTS8-2#TRMPBF from Analog Devices is a single-channel UV/OV voltage monitor IC in 8-lead TSOT-23 package, designed for precise power supply supervision with ±1.5% threshold accuracy, 29µA quiescent current, and adjustable reset timeout via external capacitor. It supports 2.3V–6V direct supply operation or higher voltages (e.g., 12V/24V/48V) via internal 6.2V shunt regulator, and features independent open-drain OV and UV outputs with glitch immunity-used in desktop computers, network servers, and core/I/O voltage monitoring.
For engineers reviewing the LTC2912CTS8-2#TRMPBF datasheet, LTC2912CTS8-2#TRMPBF pinout, LTC2912CTS8-2#TRMPBF application, or LTC2912CTS8-2#TRMPBF equivalent, key selection criteria include its UV/OV trip point adjustability, DIS pin-enabled margining capability, guaranteed operation down to VCC = 1V, and compatibility with high-voltage supplies using series current-limiting resistors.
Technical Context
The LTC2912CTS8-2#TRMPBF implements dual comparator-based UV/OV detection with integrated low-pass filtering on VH and VL inputs to reject transient glitches. Its DIS pin (Pin 1) provides active-high disable control for both OV and UV outputs-critical for voltage margining during system test or calibration.
Internally, it uses a 400kHz oscillator to drive programmable timeout logic tied to the TMR pin, enabling UV/OV assertion hold times from ~6ms to >10s via external capacitor (CTMR ≥10pF). The device guarantees valid output behavior at VCC ≥1V and includes a 2µA internal pull-down on DIS to ensure safe default operation when left unconnected.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.3V to 6V direct; up to 48V with external current-limiting resistor due to 6.2V internal shunt regulator |
| Threshold Accuracy | ±1.5% over full temperature range - ensures reliable reset within tight supply tolerance bands (e.g., 3.3V ±10%) |
| Quiescent Current | 29µA typical - enables long-term battery-backed or low-power embedded supervision without significant load |
| UV/OV Timeout Range | 6ms to 12.5ms per nF on TMR pin - allows precise reset pulse width tuning for system stabilization after fault recovery |
| Output Type | Open-drain OV and UV - supports wired-OR reset buses and flexible pull-up configurations (e.g., to different rail voltages) |
| DIS Pin Function | Active-high disable input (1.2V VIH min) - suppresses OV/UV assertion except during VCC UVLO, enabling controlled margining tests |
| Operating Temp Range | 0°C to 70°C (C-grade) - validated for commercial environments including desktop PCs and enterprise servers |
Pinout & Package
Package: 8-Lead Plastic TSOT-23 (TS8), 3mm × 1.75mm footprint, exposed pad not present (unlike DFN variant); thermal resistance θJA = 195°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - DIS | Output Disable Control | Active-high input; disables OV and UV outputs except during VCC undervoltage lockout (UVLO); internal 2µA pull-down ensures safe default state |
| 2 - UV | Undervoltage Output | Open-drain logic output asserted low when VH input falls below threshold; weak internal pull-up to VCC |
| 3 - OV | Overvoltage Output | Open-drain logic output asserted low when VL input rises above threshold; weak internal pull-up to VCC |
| 4 - GND | Ground Reference | Primary return path for internal circuitry and external timing capacitor (CTMR) |
| 5 - TMR | Timeout Timer Input | Connects to external capacitor (≥10pF) to set UV/OV assertion hold time; tie to VCC to bypass timer |
| 6 - VL | Overvoltage Sense Input | Input referenced to GND; triggers OV when voltage exceeds 0.5V threshold (±1.5%) |
| 7 - VH | Undervoltage Sense Input | Input referenced to GND; triggers UV when voltage falls below 0.5V threshold (±1.5%) |
| 8 - VCC | Power Supply Input | Accepts 2.3V–6V directly; operates as shunt regulator above 6V (max 10mA input current required) |
Key Features
| Feature | Design Value |
|---|---|
| Glitch-immune UV/OV detection | Integrated low-pass filtering rejects sub-500µs transients without adding hysteresis-induced threshold error |
| Adjustable reset timeout | Programmable 6–12.5ms/nF delay via external capacitor - eliminates need for discrete RC networks or microcontroller polling |
| VCC shunt regulation | 6.2V internal regulator enables direct use with 12V/24V/48V rails using only one series resistor - simplifies high-voltage supervision |
| Margining support via DIS pin | Dedicated active-high disable allows temporary suppression of UV/OV during production testing or voltage stress validation |
| Low-VCC operation guarantee | Valid UV/OV outputs and internal logic functional down to VCC = 1V - ensures robust power-up sequencing in brownout conditions |
Applications
| Desktop & Notebook Computers | Network Servers |
|---|---|
Use Scenario: Monitoring 3.3V ±10% CPU core or I/O supply rail during boot and runtime. IC Role / Device Role / Timing Role: Single-supply UV/OV supervisor providing reset assertion on out-of-tolerance events with 200ms timeout (via 22nF TMR cap). Use Value: Prevents processor lockup or data corruption by ensuring stable voltage before firmware execution begins. | Use Scenario: Supervising redundant 12V backplane supplies in blade server chassis. IC Role / Device Role / Timing Role: High-voltage-compatible monitor using 200kΩ series resistor on VCC to regulate 12V input; DIS pin used for hot-swap enable/disable sequencing. Use Value: Enables safe insertion/removal of power modules without false resets caused by supply transients. |
| Core Voltage Monitors | I/O Voltage Monitors |
Use Scenario: Validating 2.5V or 1.8V FPGA core supply against ±5% tolerance. IC Role / Device Role / Timing Role: Configured with precision resistor divider (RA/RB/RC) to scale 2.5V to 0.5V thresholds at VH/VL pins. Use Value: Achieves ±1.5% total trip accuracy - tighter than standard 3-pin reset ICs - critical for advanced process nodes. | Use Scenario: Monitoring PCIe 3.3V auxiliary rail in storage controllers. IC Role / Device Role / Timing Role: Dual-output open-drain interface allows shared reset bus with other supervisors; UV/OV outputs independently wired to separate power domains. Use Value: Isolates fault propagation - an I/O rail overvoltage does not force core domain reset unless explicitly designed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2912CDDB-2#TRMPBF | Same functionality and electrical specs, but in 3mm × 2mm DFN package with exposed GND pad and lower θJA (55°C/W) | Better thermal performance in high-density layouts; requires different PCB footprint and reflow profile | Select for thermally constrained designs or where board space permits larger 8-lead DFN |
| LTC2904CMS8#TRPBF | Dual-channel, 3-state programmable UV/OV monitor; ±0.75% threshold accuracy; no DIS pin; fixed 200ms timeout | Supports two independent supplies; lacks margining disable feature; higher accuracy but less flexible timing | Choose when supervising two rails simultaneously and absolute threshold precision outweighs programmable timeout needs |
Compared with LTC2912CDDB-2#TRMPBF, the LTC2912CTS8-2#TRMPBF offers identical supervision logic in a smaller TSOT-23 footprint ideal for space-constrained boards, while LTC2904CMS8#TRPBF trades single-rail flexibility for dual-rail integration and tighter accuracy-making it suitable for cost-optimized dual-supply systems without margining requirements.
Availability
LTC2912CTS8-2#TRMPBF is available at Aetrix Electronics and suitable for desktop computers, network servers, and core/I/O voltage monitoring requiring stable component supply across commercial temperature grades.
Supply support for LTC2912CTS8-2#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 computing markets.
The LTC2912 product line delivers micropower, precision voltage supervision ICs optimized for reliable power-up sequencing, brownout protection, and margining in space- and power-sensitive computing platforms.
FAQ
What is the function of the DIS pin on the LTC2912CTS8-2#TRMPBF?
The DIS (Disable) pin on the LTC2912CTS8-2#TRMPBF is an active-high input that suppresses both OV and UV output assertions during normal operation-except when VCC falls below UVLO threshold (~2V). This enables voltage margining tests where intentional over/undervoltage conditions must not trigger system reset. With a 2µA internal pull-down, the pin defaults to enabled if left floating.
Can the LTC2912CTS8-2#TRMPBF monitor a 48V supply directly?
Yes-the LTC2912CTS8-2#TRMPBF can monitor a 48V supply by using its internal 6.2V shunt regulator. A series current-limiting resistor (e.g., 200kΩ) is required between the 48V source and the VCC pin to limit input current to ≤10mA. The device then regulates internally and draws only 29µA quiescent current, making it viable for high-voltage industrial or telecom applications.
How is the UV/OV timeout period set on the LTC2912CTS8-2#TRMPBF?
The UV/OV timeout period on the LTC2912CTS8-2#TRMPBF is set by connecting an external capacitor (CTMR ≥10pF) between the TMR pin and GND. The timeout follows tUOTO ≈ 9ms/nF (typical), so a 1nF capacitor yields ~8.5ms. Tying TMR to VCC bypasses the timer entirely, causing immediate output deassertion after fault clearance.
What is the minimum VCC voltage required for valid operation of the LTC2912CTS8-2#TRMPBF?
The LTC2912CTS8-2#TRMPBF guarantees functional UV and OV outputs down to VCC = 1V. Below this, behavior is unspecified. At VCC ≥2V, VH and VL comparators become fully active; at VCC <2V, the device enters undervoltage lockout (UVLO), asserting UV low while blocking OV until VCC recovers above ~2.1V.
Does the LTC2912CTS8-2#TRMPBF support negative voltage monitoring?
No-the LTC2912CTS8-2#TRMPBF is designed exclusively for positive-supply monitoring. Its VH and VL inputs are referenced to GND and operate only with positive voltages (0V to 7.5V max). For negative rail supervision, Analog Devices recommends the LTC2909 or LTC2914, which include dedicated negative-input channels and separate VCC pins.
LTC2912CTS8-2#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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
LTC2912CTS8-2#TRMPBF FAQ
1.How can I place an order for LTC2912CTS8-2#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2912CTS8-2#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 LTC2912CTS8-2#TRMPBF reliable?
The price and inventory of LTC2912CTS8-2#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2912CTS8-2#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2912CTS8-2#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2912CTS8-2#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2912CTS8-2#TRMPBF?
LTC2912CTS8-2#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2912CTS8-2#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 LTC2912CTS8-2#TRMPBF?
For technical support, including LTC2912CTS8-2#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2912CTS8-2#TRMPBF requirements.
6.How does Aetrix verify that LTC2912CTS8-2#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2912CTS8-2#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 LTC2912CTS8-2#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2912CTS8-2#TRMPBF?
All LTC2912CTS8-2#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2912CTS8-2#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 LTC2912CTS8-2#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2912CTS8-2#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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