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Analog Devices Inc. LTC2912CTS8-3#TRMPBF
- Part No.:
- LTC2912CTS8-3#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2912CTS8-3#TRMPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TSOT23-8
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LTC2912CTS8-3#TRMPBF from Analog Devices is a single-channel UV/OV voltage monitor IC in TSOT-23-8 package, designed for precise 3.3V ±10% supply supervision. It features ±1.5% threshold accuracy, 29µA quiescent current, open-drain UV and noninverting OV outputs, and adjustable reset timeout via external capacitor - deployed in desktop computers, network servers, and core voltage monitoring systems.
For engineers reviewing the LTC2912CTS8-3#TRMPBF datasheet, LTC2912CTS8-3#TRMPBF pinout, LTC2912CTS8-3#TRMPBF application, or LTC2912CTS8-3#TRMPBF equivalent, key selection criteria include guaranteed operation down to VCC = 1V, glitch-immune VH/VL inputs, latch-controlled OV polarity, and compatibility with 12V/24V/48V supplies via internal shunt regulator.
Technical Context
The LTC2912CTS8-3#TRMPBF implements dual comparator architecture with independent VH (undervoltage sense) and VL (overvoltage sense) inputs, each filtered to reject sub-500µs transients. Its internal 6.2–7.3V shunt regulator enables direct connection to 12V/24V/48V rails when paired with a series current-limiting resistor.
Unlike LTC2912-1 (latched low OV) and LTC2912-2 (disable-enabled), the -3 variant provides noninverting OV output with latch-clear functionality on LATCH pin - asserting high during overvoltage and holding latched until LATCH is pulled high, while UV remains open-drain low-active with programmable timeout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 2.3V to 6V direct; up to 48V with external series resistor and internal 6.2–7.3V shunt regulation |
| UV/OV Threshold Accuracy | ±1.5% over full temperature range - ensures reliable 3.3V ±10% trip points (4.5V UV, 5.5V OV) without calibration |
| Quiescent Current | 29µA typical - enables micropower operation in battery-backed or always-on supervisory circuits |
| Reset Timeout Control | Adjustable via TMR pin capacitor (e.g., 1nF → 8.5ms); disable by tying TMR to VCC |
| Output Configuration | Open-drain UV (low-active); noninverting OV (high-active, latched); both with weak internal pull-up to VCC |
| Minimum Valid VCC | 1V - guarantees UV assertion and OV state definition even during brownout conditions |
| Input Glitch Immunity | 50–500µs rejection window - eliminates false triggering from ESD or switching noise without added hysteresis |
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 control | Pulling high clears OV latch and makes OV behave like UV (timeout-based); pulling low enables latched high OV output |
| UV (Pin 2) | Undervoltage logic output | Open-drain, active-low output asserted when VH input falls below threshold; held low for programmed timeout after recovery |
| OV (Pin 3) | Overvoltage logic output | Noninverting, active-high, latched output asserted when VL input exceeds threshold; cleared only by LATCH pin |
| GND (Pin 4) | Device ground reference | Primary return path for internal circuitry and TMR capacitor; must be low-impedance for accurate timing |
| TMR (Pin 5) | Reset timeout timer control | Connect external capacitor to GND to set timeout (9ms/nF); tie to VCC to bypass delay |
| VL (Pin 6) | Overvoltage sense input | Monitors low-side divider tap; triggers OV when voltage > 0.5V; tied to GND if unused |
| VH (Pin 7) | Undervoltage sense input | Monitors high-side divider tap; triggers UV when voltage < 0.5V; tied to VCC if unused |
| VCC (Pin 8) | Power supply input | Accepts 2.3–6V directly; regulates higher voltages (e.g., 12V/24V/48V) via internal shunt; requires 0.1µF bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply UV/OV monitoring | Replaces discrete resistor-divider + comparator solutions with integrated, calibrated sensing and timing |
| Adjustable reset timeout | Capacitor-programmable delay (e.g., 200ms with 22nF) ensures sufficient system settling before release |
| Guaranteed operation at VCC ≥ 1V | Enables robust reset assertion during deep brownout, critical for safe power-down sequencing |
| Glitch-immune comparator inputs | Internal filtering rejects transients < 500µs - avoids false resets without compromising threshold accuracy |
| Noninverting latched OV output | Eliminates need for external inverter; simplifies wired-OR reset bus integration where high-active signaling is required |
Applications
| Desktop Computer Power Sequencing | Network Server Core Voltage Monitoring |
|---|---|
|
Use Scenario: Supervising 3.3V ±10% main logic rail during cold boot and thermal throttling events. IC Role / Device Role / Timing Role: LTC2912CTS8-3#TRMPBF acts as primary undervoltage/overvoltage detector, generating latched OV signal for fault logging and UV pulse for CPU reset coordination. Use Value: ±1.5% threshold accuracy prevents premature shutdown during nominal 3.3V tolerance band; 29µA quiescent current minimizes standby loss. |
Use Scenario: Monitoring redundant 12V backplane supply with fail-safe power-good assertion. IC Role / Device Role / Timing Role: LTC2912CTS8-3#TRMPBF interfaces with 12V via series resistor and internal shunt regulator, using VL/VH resistive dividers to detect ±10% deviation. Use Value: Internal 6.2–7.3V shunt allows direct 12V connection without external regulator; latch function holds OV high until operator intervention. |
| Industrial PLC I/O Module Supervision | Embedded Edge Gateway Power Integrity |
|
Use Scenario: Ensuring clean startup of isolated 2.5V/3.3V I/O domain in harsh EMI environments. IC Role / Device Role / Timing Role: LTC2912CTS8-3#TRMPBF monitors local 3.3V rail with VH/VL inputs referenced to precision divider; UV initiates FPGA configuration hold, OV triggers watchdog timeout. Use Value: 500µs glitch immunity prevents spurious resets from motor drive noise; TSOT-23 package enables compact layout near power stage. |
Use Scenario: Validating stable 5V USB-C PD input before enabling cellular modem and sensor subsystems. IC Role / Device Role / Timing Role: LTC2912CTS8-3#TRMPBF senses 5V input through resistor network, asserts latched OV on overvoltage and timed UV on undervoltage to gate power-enable FETs. Use Value: Adjustable TMR timeout (e.g., 85ms with 10nF) matches modem power-up sequence timing; 1V minimum VCC operation supports graceful shutdown during input collapse. |
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 | Same functionality and pinout; rated for –40°C to 85°C industrial temperature range vs. 0°C to 70°C of LTC2912CTS8-3#TRMPBF | Suitable for extended-temperature deployments such as outdoor base stations or automotive infotainment head units | Select when operating ambient exceeds 70°C or requires industrial-grade qualification |
| LTC2912CDDB-3#TRMPBF | Same electrical specs; packaged in 3mm × 2mm DFN with exposed GND pad (θJA = 55°C/W) vs. TSOT-23 (θJA = 195°C/W) | Better thermal performance in high-density PCBs; requires soldering exposed pad for optimal reliability | Select when board space permits DFN and thermal management is critical |
Compared with LTC2912CTS8-3#TRMPBF, the ITS8-3 variant extends temperature capability without layout change, while the CDDB-3 variant improves thermal resistance at the cost of assembly complexity - both retain identical UV/OV behavior, latch control, and timing characteristics.
Availability
LTC2912CTS8-3#TRMPBF is available at Aetrix Electronics and suitable for desktop computing, network server, and industrial embedded applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LTC2912CTS8-3#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, communications, automotive, and aerospace markets.
The LTC2912 product line delivers precision, low-power voltage supervision ICs optimized for reliable power-rail monitoring in space-constrained, thermally demanding, and mission-critical systems.
FAQ
What is the exact overvoltage and undervoltage threshold voltage for LTC2912CTS8-3#TRMPBF?
The LTC2912CTS8-3#TRMPBF has a nominal internal comparator threshold of 500mV, used with external resistor dividers to set system-level UV/OV points. For a 3.3V ±10% application, typical design yields 4.5V UV and 5.5V OV trip points. Threshold accuracy is ±1.5% over temperature, meaning actual trip points fall within ±1.5% of the calculated value - e.g., 4.5V UV may trigger between 4.433V and 4.567V.
How does the LATCH pin affect the OV output behavior of LTC2912CTS8-3#TRMPBF?
When LATCH is pulled low, the OV output of LTC2912CTS8-3#TRMPBF latches high upon overvoltage detection and remains high until LATCH is pulled high. When LATCH is high, OV behaves like UV - asserting high only while VL exceeds threshold and releasing after the TMR timeout expires. This dual-mode operation enables both fault-hold and transient-detection use cases in one device.
Can LTC2912CTS8-3#TRMPBF monitor a 12V supply directly without external components?
No - LTC2912CTS8-3#TRMPBF cannot connect directly to 12V. Its VCC pin has an internal 6.2–7.3V shunt regulator, so a series current-limiting resistor must be used to limit input current to ≤10mA. For 12V input, a ~600Ω resistor (assuming 6V drop across shunt) is typical. The VH/VL inputs remain referenced to the internal 500mV threshold and require appropriate resistor dividers.
What is the minimum capacitor value required on the TMR pin of LTC2912CTS8-3#TRMPBF?
The TMR pin of LTC2912CTS8-3#TRMPBF requires a minimum load of 10pF to ground for stable timing operation. Capacitors smaller than 10pF may cause inconsistent timeout periods or erratic behavior. Typical designs use 1nF (8.5ms timeout) to 22nF (200ms timeout); leakage current must stay below 1.3µA for long delays.
Does LTC2912CTS8-3#TRMPBF support operation below 2.3V supply voltage?
Yes - LTC2912CTS8-3#TRMPBF guarantees functional operation down to VCC = 1V. At VCC ≥ 1V, UV is asserted low and OV is defined (high for -3 variant). However, full specification compliance (e.g., ±1.5% threshold accuracy, 29µA ICC) applies only from VCC = 2.3V. Below 2.3V, it serves as a robust brownout detector but with relaxed parametric limits.
LTC2912CTS8-3#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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
LTC2912CTS8-3#TRMPBF FAQ
1.How can I place an order for LTC2912CTS8-3#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2912CTS8-3#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 LTC2912CTS8-3#TRMPBF reliable?
The price and inventory of LTC2912CTS8-3#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2912CTS8-3#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2912CTS8-3#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2912CTS8-3#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2912CTS8-3#TRMPBF?
LTC2912CTS8-3#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2912CTS8-3#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 LTC2912CTS8-3#TRMPBF?
For technical support, including LTC2912CTS8-3#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2912CTS8-3#TRMPBF requirements.
6.How does Aetrix verify that LTC2912CTS8-3#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2912CTS8-3#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 LTC2912CTS8-3#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2912CTS8-3#TRMPBF?
All LTC2912CTS8-3#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2912CTS8-3#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 LTC2912CTS8-3#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2912CTS8-3#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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