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Analog Devices Inc. LTC2912CTS8-1#TRMPBF
- Part No.:
- LTC2912CTS8-1#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2912CTS8-1#TRMPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,381
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Product details
Overview
LTC2912CTS8-1#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 6–14ms reset timeout. It monitors one supply (e.g., 3.3V ±10%) in desktop computers and network servers, asserting open-drain UV and OV outputs independently upon fault detection.
For engineers reviewing the LTC2912CTS8-1#TRMPBF datasheet, LTC2912CTS8-1#TRMPBF pinout, LTC2912CTS8-1#TRMPBF application, or LTC2912CTS8-1#TRMPBF equivalent, key selection considerations include latch-controlled OV output behavior, VCC shunt regulator operation up to 48V via external resistor, guaranteed operation down to VCC = 1V, and TSOT-23 thermal performance (θJA = 195°C/W).
Technical Context
The LTC2912CTS8-1#TRMPBF implements dual comparator-based monitoring: VH input triggers undervoltage when below 0.5V, VL input triggers overvoltage when above 0.5V. Both inputs feature internal low-pass filtering for glitch immunity without added hysteresis error. The TMR pin sets timeout via external capacitor (e.g., 1nF → 8.5ms), and can be strapped to VCC to bypass timing.
Its LATCH pin (Pin 1) enables OV latching - pulled low to latch OV output low on overvoltage event; pulled high to clear latch and enable timeout-based OV behavior matching UV. Internal VCC shunt regulator (6.2–7.3V) allows direct connection to 12V/24V/48V supplies with series current-limiting resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 2.3V to 6V direct; up to 48V via external series resistor and internal 6.2–7.3V shunt regulator |
| Threshold Accuracy | ±1.5% over full temperature range - ensures reliable trip points for 3.3V ±10% monitoring (e.g., 4.5V UV, 5.5V OV) |
| Quiescent Current | 29µA typical - enables micropower system-level supervision without burdening low-power rails |
| Reset Timeout Range | 6–14ms (CTMR = 1nF); scalable from ~9ms/nF - provides configurable pulse width for processor reset hold time |
| Output Type | Open-drain UV and OV - supports wired-OR reset bus, level translation, and flexible pull-up configuration |
| Operating Temp | 0°C to 70°C (C-grade) - validated for commercial computing and server board environments |
| Input Glitch Immunity | Internal RC filtering on VH/VL - rejects sub-500µs transients, eliminating need for external RC networks |
Pinout & Package
Package: 8-Lead Plastic TSOT-23 (TS8), 3.00mm × 1.75mm × 0.85mm, exposed pad not present (unlike DFN variant), θJA = 195°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LATCH (Pin 1) | OV latch control input | Pulled low to latch OV output low on overvoltage; pulled high to clear latch and enable timeout-driven OV behavior |
| UV (Pin 2) | Undervoltage logic output | Open-drain, asserts low when VH < 0.5V; held low for programmable timeout after recovery |
| OV (Pin 3) | Overvoltage logic output (latched) | Open-drain, latches low when VL > 0.5V; cleared only by LATCH high or power cycle |
| GND (Pin 4) | Device ground reference | Return path for all internal circuitry and external timing capacitor (TMR-to-GND) |
| TMR (Pin 5) | Reset timeout timer input | Connects to GND via capacitor (e.g., 1nF) to set 8.5ms timeout; tie to VCC to disable timeout |
| VL (Pin 6) | Overvoltage sense input | Monitors low-side divider tap; >0.5V triggers OV; tie to GND if unused |
| VH (Pin 7) | Undervoltage sense input | Monitors high-side divider tap; <0.5V triggers UV; tie to VCC if unused |
| VCC (Pin 8) | Supply input / shunt regulator | Accepts 2.3–6V directly; regulates higher voltages (e.g., 48V) with external series resistor |
Key Features
| Feature | Design Value |
|---|---|
| Latch-controlled OV output | Enables persistent fault signaling until explicit clear via LATCH pin - critical for fault logging in unattended systems |
| VCC shunt regulator | Supports direct connection to 12V/24V/48V rails using simple series resistor - eliminates need for external LDO |
| Guaranteed operation at VCC ≥ 1V | Ensures valid UV assertion and OV weak-pull during brownout - supports robust power-up/power-down sequencing |
| Adjustable timeout with disable | TMR pin allows precise reset pulse width tuning (e.g., 200ms with 22nF) or full bypass - matches diverse MCU reset requirements |
| ±1.5% threshold accuracy over temp | Minimizes margin loss in tight-tolerance applications (e.g., 3.3V ±10% = 4.5V–5.5V window) without calibration |
Applications
| Desktop Computers | Network Servers |
|---|---|
Use Scenario: Monitoring 3.3V core I/O rail in ATX motherboard power delivery. IC Role / Device Role / Timing Role: Single-supply UV/OV supervisor asserting open-drain reset to PCH upon 3.3V excursion beyond ±10%. Use Value: 29µA quiescent current avoids loading standby rail; ±1.5% accuracy ensures reset occurs precisely within spec-defined window. | Use Scenario: Supervising 12V auxiliary supply feeding PCIe slot regulators. IC Role / Device Role / Timing Role: High-voltage supervisor using VCC shunt mode with 200kΩ series resistor to monitor 12V rail. Use Value: Direct 12V interface eliminates external regulator; latch function holds reset until system firmware acknowledges fault. |
| Core Voltage Monitors | I/O Voltage Monitors |
Use Scenario: Detecting undervoltage on 1.8V CPU core rail during dynamic frequency scaling. IC Role / Device Role / Timing Role: UV-only monitoring via VH input tied to resistive divider; OV input disabled (tied GND). Use Value: Guaranteed operation down to VCC = 1V ensures reset assertion even during deep brownout; 500µs delay prevents false triggering. | Use Scenario: Validating 5V USB power rail integrity before enabling port controller. IC Role / Device Role / Timing Role: Dual-threshold monitoring of 5V rail with 4.5V UV and 5.5V OV trip points. Use Value: Adjustable timeout (via 10nF TMR cap) enforces 85ms minimum reset pulse - satisfies USB 2.0 power-good timing. |
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; rated for –40°C to 85°C industrial temperature range | Required for extended-temperature embedded systems (e.g., telecom base stations) | Select when operating ambient exceeds 70°C or requires industrial-grade reliability |
| LTC2912CTS8-3#TRMPBF | Non-inverting OV output (asserts high, not low); identical UV, timing, and latch behavior | Suitable where active-high reset logic or wired-OR with other high-asserting supervisors is needed | Choose when system reset architecture requires active-high OV signal instead of open-drain low |
Compared with LTC2912ITS8-1#TRMPBF, the LTC2912CTS8-1#TRMPBF offers lower cost for commercial-temperature applications; compared with LTC2912CTS8-3#TRMPBF, it provides active-low OV output essential for legacy reset buses requiring sink-current assertion.
Availability
LTC2912CTS8-1#TRMPBF is available at Aetrix Electronics and suitable for desktop computers, network servers, and core/I/O voltage monitoring applications requiring stable component supply, commercial-temperature grade assurance, and long-term production continuity.
Supply support for LTC2912CTS8-1#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, Inc. 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 precision, low-power voltage supervision ICs optimized for space-constrained computing and server platforms where accurate, glitch-immune power monitoring is mission-critical.
FAQ
What is the function of the LATCH pin on the LTC2912CTS8-1#TRMPBF?
The LATCH pin (Pin 1) controls the OV output behavior of the LTC2912CTS8-1#TRMPBF. When pulled low, it causes the OV output to latch low upon overvoltage detection and remain asserted until LATCH is pulled high or power is cycled. When held high, OV operates with the same timeout-based behavior as the UV output - asserting low for the programmed duration then releasing.
Can the LTC2912CTS8-1#TRMPBF monitor a 48V supply directly?
Yes - the LTC2912CTS8-1#TRMPBF can monitor a 48V supply directly using its internal VCC shunt regulator. A series current-limiting resistor must be placed between the 48V source and the VCC pin to limit input current to ≤10mA. With typical shunt voltage of 6.2–7.3V, a ~3.8kΩ resistor ensures safe operation while maintaining 29µA quiescent current draw.
What is the minimum VCC voltage required for the LTC2912CTS8-1#TRMPBF to assert a valid UV output?
The LTC2912CTS8-1#TRMPBF guarantees UV output assertion (low) and functional monitoring down to VCC = 1V. At this voltage, VOL remains ≤0.15V at 100µA sink current, ensuring compatible logic-level reset signaling even during severe brownout conditions before UVLO activation at ~2V.
How is the reset timeout period set on the LTC2912CTS8-1#TRMPBF?
The reset timeout period on the LTC2912CTS8-1#TRMPBF is set by an external capacitor (CTMR) connected between the TMR pin (Pin 5) and GND. The relationship is approximately 9ms per nanofarad (e.g., 22nF yields ~200ms). Tying TMR to VCC disables the timeout, causing immediate output release after fault clearance.
Does the LTC2912CTS8-1#TRMPBF require external pull-up resistors on its UV and OV outputs?
The LTC2912CTS8-1#TRMPBF includes weak internal pull-ups to VCC on both UV and OV outputs, eliminating external resistors when rise-time constraints are relaxed. However, for reliable state definition at very low VCC (<1.5V) or in wired-OR configurations, a ≤100kΩ external pull-up on OV is recommended to ensure sufficient pull-up strength during startup.
LTC2912CTS8-1#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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
LTC2912CTS8-1#TRMPBF FAQ
1.How can I place an order for LTC2912CTS8-1#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2912CTS8-1#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 LTC2912CTS8-1#TRMPBF reliable?
The price and inventory of LTC2912CTS8-1#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2912CTS8-1#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2912CTS8-1#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2912CTS8-1#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2912CTS8-1#TRMPBF?
LTC2912CTS8-1#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2912CTS8-1#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 LTC2912CTS8-1#TRMPBF?
For technical support, including LTC2912CTS8-1#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2912CTS8-1#TRMPBF requirements.
6.How does Aetrix verify that LTC2912CTS8-1#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2912CTS8-1#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 LTC2912CTS8-1#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2912CTS8-1#TRMPBF?
All LTC2912CTS8-1#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2912CTS8-1#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 LTC2912CTS8-1#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2912CTS8-1#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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